Furuno FR-2125, FR-2125-B, FR-2125W, FR-2125W-B, FR-2155 Operator's Manual

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New standard of marine radar technology through

50 years of FURUNO’s marine electronics activit ies

21” MULTI-COLOR HIGH-PERFORM ANCE

SHIPBORNE RADAR AND ARPA

MODEL

FR-2105/2105-B SERIES

FURUNO ELECTRIC CO., LTD.

NISHINOMIYA, JAPAN

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9-52, Ashihara-cho, Nishinomiya, Japan

Telephone: 0798-65-2111 Telefax: 0798-65-4200

Your Local Agent/Dealer

ll rights reserved.

PUB. No. OME-34640

FR-2105/2105-B SERIES

(

TATA)

FIRST EDITION : JUL. 1998 U : JUN. 6, 2001

Printed in Japan

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Before turning on the radar, make sure that there is no one near the scanner unit.

Serious injury or even death may result if a rotating antenna strikes someone standing nearby.

DANGER

SAFETY INSTRUCTIONS

WARNING

Radio Frequency Radiation Hazard

The radar antenna emits electromagnetic radio frequency (RF) energy which can be harmful, particularly to your eyes. Never look directly into the antenna aperture from a close distance while the radar is in operation or expose yourself to the transmitting antenna at a close distance.

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WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel should work inside the equipment.

Turn off the radar power switch before servicing the scanner unit. Post a warning sign near the switch indicating it should not be turned on while the scanner unit is being serviced.

Prevent the potential risk of being struck by the rotating scanner and exposure to RF radiation hazard.

Wear a safety belt and hard hat when working on the scanner unit.

Serious injury or death can result if someone falls from the radar scanner mast.

Do not disassemble or modify the equipment.

Fire, electrical shock or serious injury can result.

Turn off the power immediately if water leaks into the equipment or the equipment is emitting smoke or fire.

Continued use of the equipment can cause fire or electrical shock.

WARNING

Do not place liquid-filled containers on the top of the equipment.

Fire or electrical shock can result if a liquid spills into the equipment.

Do not operate the equipment with wet hands.

Electrical shock can result.

Keep heater away from equipment.

Heat can alter equipment shape and melt the power cord, which can cause fire or electrical shock.

CAUTION

Do not use the equipment for other than its intended purpose.

Use of the equipment as a stepping stool, for example, can result in personal injury or equipment damage.

No one navigation device should ever be solely replied upon for the navigation of a vessel.

Always confirm position against all available aids to navigation, for safety of vessel and crew.

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iii

ARPA Safety Inst ructions

WARNING

No one navigational aid should be relied upon for the safety of vessel and crew. The navigator has the responsibility to check all aids available to confirm position. Electronic aids are not a substitute for basic navigational principles and common sense.

• This auto plotter automatically tracks an automatically or manually acquired radar target and calculates its course and speed, indicating them by a vector. Since the data generated by the auto plotter are based on what radar targets are selected, the radar must always be optimally tuned for use with the auto plotter, to ensure required targets will not be lost or unwanted targets such as sea returns and noise will not be acquired and tracked.

• A target does not always mean a land mass, reef, ships or other surface vessels but can imply returns from sea surface and clutter. As the level of clutter changes with environment, the operator should properly adjust the A/C SEA, A/C RAIN and GAIN controls to be sure target echoes are not eliminated from the radar screen.

CAUTION

The plotting accuracy and response of this auto plotter meets IMO standards. Tracking accuracy is affected by the following:

• Tracking accuracy is affected by course change. One to two minutes is required to restore vectors to full accuracy after an abrupt course change. (The actual amount depends on gyrocompass specifications.)

• The amount of tracking delay is inversely proportional to the relative speed of the target. Delay is on the order of 15—30 seconds for high relative speed; 30—60 seconds for low relative speed.

Display accuracy is affected by the following:

• Echo intensity

• Radar transmission pulsewidth

• Radar bearing error

• Gyrocompass error

• Course change (own ship or target)

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Several labels are attached to the display unit and scanner unit.Do not remove these labels. If a label is peeling off or is illegible, contact a FURUNO agent or dealer.

WARNING

To avoid electrical shock, do not remove cover. No user-serviceable parts inside.

Name: Warning Label (1) Type: 86-003-1011-0 Code no.: 100-236-230

WARNING

Radiation hazard. Only qualified personnel should work inside scanner. Confirm that TX has stopped before opening scanner.

Name: Radiation Warning Label Type: 03-142-3201-0 Code no.: 100-266-890

WARNING

Display unit may fall. Lock stay before servicing.

Name : Warning Label Type : 03-144-1332 Code No. : 100-266-290

WARNING

ARNING

Possibility of injuly. Hold handle when mounting display unit.

Name : Warning Label Type : 03-144-1333 Code No. : 100-266-300

DANGER

ANGER

Electrical shock hazard. Do not touch anode cap or its cable.

Name : Danger Label Type : 14-055-4201 Code No. : 100-243-450

DANGER

ANGER

Electrical shock hazard. Do not touch parts inside this cover.

Name : Danger Label Type : 14-055-4202 Code No. : 100-245-220

DANGER

ANGER

Electrical shock hazard. Turn off power before servicing.

Name : Danger Label Type : 66-022-2012 Code No. : 100-237-730

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TABLE OF CONTENTS

INTRODUCTION ...........................................................................................................................................viii

A W

ORD TO THE OWNER OF

FURUNO R

ADAR

.................................................................................................

VIII

PECIFICATIONS OF

FR-2105/2105-B S

ERIES RADAR AND

ARPA.......................................................................XI

CHAPTER 1 OPERATION............................................................................................................................1.1

1.1 T

URNING ON THE POWER

..............................................................................................................................1

1.2 T

RANSMITTER

ON.........................................................................................................................................2

1.3 C

ONTROL HEAD

............................................................................................................................................3

1.4 CRT B

RILLIANCE

..........................................................................................................................................5

1.5 T

UNING THE RECEIVER

.................................................................................................................................5

1.6 O

N-SCREEN LEGENDS AND MARKERS

............................................................................................................7

1.7 D

EGAUSSING THE

CRT S

CREEN

....................................................................................................................9

1.8 I

NITIALIZING THE GYRO READOUT

..................................................................................................................9

1.9 P

RESENTATION MODES

...............................................................................................................................10

1.10 S

ELECTING THE RANGE SCALE

..................................................................................................................13

1.11 S

ELECTING THE PULSELENGTH

..................................................................................................................13

1.12 A

DJUSTING THE SENSITIVITY

.....................................................................................................................16

1.13 S

UPPRESSING SEA CLUTTER

.....................................................................................................................16

1.14 S

UPPRESSING PRECIPITATION CLUTTER

....................................................................................................18

1.15 I

NTERFERENCE REJECTOR

........................................................................................................................18

1.16 M

EASURING THE RANGE

...........................................................................................................................19

1.17 M

EASURING THE BEARING

.........................................................................................................................21

1.18 C

OLLISION ASSESSMENT BY OFFSET

EBL .................................................................................................22

1.19 M

EASURING RANGE AND BEARING BETWEEN TWO TARGETS

......................................................................23

1.20 S

ETTING A TARGET ALARM ZONE

..............................................................................................................23

1.21 O

FF-CENTERING

.......................................................................................................................................25

1.22 E

CHO STRETCH

........................................................................................................................................26

1.23 E

CHO AVERAGING

.....................................................................................................................................27

1.24 E

LECTRONIC PLOTTING AID

(EPA) ............................................................................................................29

1.25 E

NTERING OWN SHIP'S SPEED

....................................................................................................................33

1.26 T

ARGET TRAILS (ECHO TRAILS

).................................................................................................................35

1.27 P

ARALLEL INDEX LINES

.............................................................................................................................38

1.28 O

RIGIN MARK

...........................................................................................................................................40

1.29 Z

OOM

.......................................................................................................................................................41

1.30 M

ARKERS

.................................................................................................................................................42

1.31 M

ENU KEYS

..............................................................................................................................................43

1.32 RADAR 1, 2

AND

3 M

ENU SETTINGS

........................................................................................................44

1.33 F

UNCTION KEYS

.......................................................................................................................................46

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1.34 B

ARGE INFORMATION

................................................................................................................................52

1.35 R

ADAR MAP

..............................................................................................................................................52

1.36 S

UPPRESSING SECOND-TRACE ECHOES

....................................................................................................57

1.37 D

ISPLAYING EXTERNAL WAYPOINT AND NAVIGATION LINE

..........................................................................57

1.38 A

DJUSTING BRILLIANCE OF SCREEN DATA

.................................................................................................58

1.39 D

ISPLAY OF WIND/TIDE/DEPTH INFORMATION

............................................................................................59

1.40 A

LARMS

....................................................................................................................................................61

CHAPTER 2 OPERATION OF ARPA (OPTION) .........................................................................................2.1

2.1 G

ENERAL

.....................................................................................................................................................1

2.2 K

EYPADS FOR

ARPA....................................................................................................................................2

2.3 ARPA M

ENU OPERATION

.............................................................................................................................3

2.4 S

TART-UP PROCEDURE

.................................................................................................................................4

2.5 A

UTOMATIC ACQUISITION

..............................................................................................................................6

2.6 M

ANUAL ACQUISITION

.................................................................................................................................10

2.7 C

HANGING PLOT SYMBOL SIZE

....................................................................................................................11

2.8 A

DJUSTING BRILLIANCE OF PLOT MARKS

.....................................................................................................14

2.9 D

ISPLAYING TARGET DATA

..........................................................................................................................14

2.10 V

ECTOR MODES

........................................................................................................................................15

2.11 P

AST POSITION DISPLAY

...........................................................................................................................16

2.12 S

ET AND DRIFT (SET AND RATE

) ...............................................................................................................17

2.13 S

ETTING

CPA/TCPA A

LARM RANGES

.......................................................................................................18

2.14 S

ETTING A GUARD ZONE

...........................................................................................................................19

2.15 O

PERATIONAL WARNINGS

.........................................................................................................................21

2.16 T

RIAL MANEUVER

.....................................................................................................................................23

2.17 ARPA P

ERFORMANCE TEST

.....................................................................................................................25

2.18 C

RITERIA FOR SELECTING TARGETS FOR TRACKING

...................................................................................26

2.19 F

ACTORS AFFECTING

ARPA F

UNCTIONS

...................................................................................................28

CHAPTER 3 RADAR OBSERVATION.........................................................................................................3.1

3.1 G

ENERAL

.....................................................................................................................................................1

3.2 F

ALSE ECHOES

.............................................................................................................................................3

3.3 SART (S

EARCH AND RESCUE TRANSPONDER

) ..............................................................................................3

3.4

RACON (R

ADAR BEACON

)............................................................................................................................7

CHAPTER 4 OPERATION OF VIDEO PLOTTER .....................................................................................4.1

4.1 G

ENERAL

.....................................................................................................................................................1

4.2 T

HE VIDEO PLOTTER DISPLAY

.......................................................................................................................2

4.3 D

ISPLAY MODES

...........................................................................................................................................2

4.4 S

ET- UP OF VIDEO PLOTTER DISPLAY

............................................................................................................4

4.5 T

RACK

..........................................................................................................................................................5

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4.6 MARKS, LINES ..............................................................................................................................................8

4.7 W

AYPOINTS..................................................................................................................................................9

4.8 N

AVIGATION LINES......................................................................................................................................12

4.9 R

ECORDING & REPLAYING DATA .................................................................................................................14

4.10 P

LOTTER PRESENTATION MODE ................................................................................................................16

4.11 I

NITIAL SETTINGS ......................................................................................................................................17

4.12

LATITUDE ERROR TABLE (ON 96 NM RANGE SCALR).........................................................17

CHAPTER 5 MAINTENANCE..................................................................................................................5.1

5.1 P

ERIODIC MAINTENANCE SCHEDULE..............................................................................................................1

5.2 L

IFE EXPECTANCY OF MAJOR PARTS .............................................................................................................2

5.3 R

EPLACEMENT OF BATTERY ..........................................................................................................................2

CHAPTER 6 TROUBLESHOOTING........................................................................................................6.1

6.1 E

ASY TROUBLESHOOTING .............................................................................................................................1

6.2 A

DVANCED-LEVEL TROUBLESHOOTING...........................................................................................................2

6.3 D

IAGNOSTIC TEST.........................................................................................................................................4

CHAPTER 7 MENU OVERVIEW..............................................................................................................7.1

CHAPTER 8 ANLILLARY EQUIPMENT..................................................................................................8.1

8.1

PERFORMANCE MONITOR..............................................................................................................................1

8.2

INTERSWITCHING UNIT...................................................................................................................................3

8.3 F

OR FISHING VESSEL....................................................................................................................................4

CHAPTER 9 DIGITAL INTERFACE (IEC61162-1)..................................................................................9.1

CHAPTER 10 PARTS LIST AND MAJOR PARTS LOCATION .............................................................10.1

Declaration of Conformity to Type (FR-21X5 series) Declaration of Conformity (FR-2155, FR-2165DS)

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INTRODUCTION

A Word to the Owner of FURUNO Radar

Thank you for purchasing this FURUNO radar. We are confident you will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manufacture of marine electronics equipment for half a century, FURUNO Electric Company has gained an unrivaled reputation as a world leader in the industry. This is the result of our technical excellence as well as our worldwide distribution and service network.

Please carefully read and follow the safety information and operating and maintenance instructions set forth in this manual before attempting to operate the equipment and conduct any maintenance. Your radar set will perform to the utmost of its ability only if it is operated and maintained in accordance with the correct procedures.

FEATURES OF THIS SERIES OF RADARS AND ARPAs

■

Daylight-bright rasterscan 21-inch multi-color, high-resolution display

■

New microprocessing technology with high-speed high-density gate array and softwar e

expertise

■

New cast aluminum scanner gearbox and new series of radiators

■

Easy operation by combination of discrete keys, rotary controls, and menu oper ation, all

logically arranged and configured

■

Electronic Plotting Aid (EPA) fitted standard, Automatic Radar Plotting Aid (ARPA) option

exceeding IMO and IEC standards .

■

Reliable CPA and T CPA war ni ng in any pl otti ng mode, accur ate t arg et data.

■

Stand-alone or integrated conf igur ation

■

Meets IMO MSC.64 (61) and IEC A. 823 : 1996 as a shipborne radar, high speed cr aft r adar

A.820 (19), and ARPA A.823 (19).

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FR-2105/2105-B Series of Radars and ARPAs

The FURUNO FR-2105/2105-B Series of radars and ARPAs are designed to meet various customers’ needs and the exacting requirements of international and national standards and regulations including:

- IMO A.477(XII): Performance Standards for Radar Equipment (up to 31.12.1998)

- IMO MSC.64(67) Annex 4: Performance Standard s for Radar E quipment ( 1. 1. 1999 and af ter )

- IEC 60936-1: Shipborne Radar Operational and Performance Requirement (1.1. 1999 and after)

- IMO A.823(19): Performance standards for Automatic Radar Plotting Aids (ARPAs) (1.1.1997 and after)

- IEC 60872-1: Automatic Radar Plotting Aids (ARPAs) (1.1.1997 and after)

- IEC 60945: 1996-11(3rd Ed) Marine Navigational E quipment General Requirements

- IMO A.820(19): Performance standards for navigational radar equipment for high speed craft (1.1.1996 and after)

- IEC 60936-2: Performance standards for navigational radar equipment f or high speed craf t

Models

This series of radar and ARPA is available in the following models: Model

Freq Band Output Transceiver configuration FR-2115,FR-2115-B X-band 12 kW TR-up FR-2125, FR-2125-B X-band 25 kW TR-up FR-2125W, FR-2125W-B X-band 25 kW TR-down FR-2155, FR-2155-B X-band 50 kW TR-up FR-2135S, FR-2135S-B S-band 30 kW TR-up FR-2135SW, FR-2135SW-B S-band 30 kW TR-down FR-2165DS S-band 60 kW TR-up

Note: FR-2155, FR-2155-B, FR-2165DS are not IMO type-approved models.

All comes with the EPA (Electronic Plotting Aid) standard fitted. An optional ARP-26 board is available to provide the full functionality of ARPA (Automatic Radar Plotting Aid). Also with an optional Video Plotter RP-26 board.

Besides the choice of the above models, the FR-2105/2105-B Series is available in the Regular type (R-type) and IMO type. The IMO type is designed as a primary radar under the 1974 SOLAS Convention on ships below 10,000 GT and also as a high speed craft radar when fitted with ARPA function (at least ATA by IEC 60936-2). The R-type satisfies the IMO and IEC standards but includes more flexibility of functionality to meet the fishing boats particularly (thus, this is an expanded type in other word).

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The table below shows the differences between R-type and IMO type radars. Other functions and specifications are common. The operator cannot navigate between these two types. Your radar is factory set for IMO type. If you want an R-type, please ask your service representative.

Function IMO type Regular type (R-type), Japanese

version

Range scales 0.125, 0.25, 0.5, 0. 75, 1. 5, 3, 6, 12,

24, 48, 96 nm

FR-2115/2115-B:

0.125, 0.25, 0.5, 0. 75, 1. 5, 3, 6, 12, 24, 48, 72 nm

Other models:

0.125, 0.25, 0.5, 0. 75, 1. 5, 3, 6, 12, 24, 48, 120 nm

Alarm zones Radar: Target Alarm Z one:

1st TAZ between 3 and 6 nm, 2nd TAZ anywhere provided the 1st TAZ is valid.

Radar: Target Alarm Zone: 1st and 2nd TAZs anywhere. Alarm

can be selected for inside ( as TAZ) or outside (as off-zone watch) mode.

ARPA: Guard Zones:

1st GZ - between 3 and 6 nm, in 0.5 nm range depth

2nd GZ - Anywhere in 0.5 nm range depth, but needs 1st GZ operative

ARPA: Guard Zones: 1st GZ - Anywhere in 0.5 nm depth

2nd GZ - Anywhere in 0.5 nm depth

x2 Zoom Not available Available on menu Echo colors Monochrome yellow or green in 16

tones

Choice of monochrome in 16 tones or 3 colors depending on echo strengths

Program num be r

MAIN 0359149103 ARPA 1859038103 DISP 1859039101 RP 0359150102 (See page 6.6 to confirm this on the screen.)

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Specifications of FR-2105/2105-B Series Radar and ARPA

ANTENNA RADIATOR

1. Type Slotted waveguide array

2. Beamwidth and sidelobe attenuation

X-band S-band Radiator Type

XN12AF XN20AF XN24AF SN30AF SN36AF

Length (mm) 1260 2040 2550 3090 3765 Beamwidth (H)

1.8° 1.23° 0.95° 2.5° 2.1°

Beamwidth (V)

20° 20° 20° 25° 25°

Sidelobe att. Within ±10°

28 dB 28 dB 28 dB 24dB 24 dB

Sidelobe att. Outside ±10°

32dB 32 dB 32dB 30 dB 30 dB

* SN30AF is available for non-SOLAS ship or for HSC

radar (FR-2135S)

3. Rotation

. FR-2115/2125/2115-B/2125-B: 24/42 rpm . FR-2125W/2135SW/2125W-B/2135SW-B: 26 rpm (60 Hz), 21 rpm (50 Hz) . FR-2135S/2135S-B: 26 rpm (60 Hz), 21 rpm (50Hz), 45 rpm (for HSC) . FR-2155/2155-B: 20 rpm (DC and 60 Hz), 16 rpm (50 Hz)

. FR-2165DS: 24 rpm

RF TRANSCEIVER

1. Frequency

X-band 9410 MHz ± 30 MHz (12, 25 kW)

9415 MHz ± 30 MHz (50 kW)

S-band 3050 MHz ± 30 MHz (35, 60 kW)

2. Output power

FR-2115/2115-B : 12 kW, FR-2125/2125W/2125-B/2125W-B: 25 kW, FR-2155/2155-B: 50 kW FR-2165DS: 60 kW, FR-2135S/2135SW/2135S-B/2135SW-B: 30 kW

3. Pulselengths and PRR

<FR-2115/2125/2115-B/2125-B>

Range scales P/L (µs) PRR (Hz)

0.125, 0.25 0.07 3000

0.5 0.07.0.15 3000

0.75, 1.5 2 from 0.07/0.15/0.3 3000/1500 3 2 from 0.15/0.3/0.5/0.7 3000/1500 6 2 from 0.3/0.5/0.7/1.2 1500/1000 12, 24 2 from 0.5/0.7/1.2 1000/600

48, 96 1.2 600/500 <FR-2155/2125W/2135S/2135SW/2165DS/ 2155-B/2125W-B/2135S-B/2135SW-B>

Range scales P/L (µs) PRR (Hz)

0.125, 0.25, 0.5 0.08 2200

0.75, 1.5 0.08/0.3* 2200/1100

3 2 from 0.08/0.3*/0.6 2200/1100

6 2 from 0.08/0.3*/0.6 2200/1100

12, 24 0.6/1.2 1100/600

48, 96 1.2 600/500

*: In case of FR-2155/2165DS/2155-B, 0.3 is replaced

with 0.2.

4. IF 60 MHz, Logarithmic. BW 28/3 MHz

5. Noise figure 6 dB

6. Duplexer Ferrite circulator with diode limiter for FR-2115/2125/2135S/2135SW/ 2115-B/2125-B/2135S-B/ 2135SW-B/2165DS. Ferrite circulator with TR limiter for FR-2155/2155-B/2125W/2125W-B.

DISPLAY

1. Picture tube 21” multi-color, 1280 x 1024 pixels, Rasterscan non-interlace at 61.44 kHz hor, 60 Hz vert. Effective display diameter 275 mm

IMO type Yellow or green echoes in 16 levels.

Echoes in the same color in 16 graduation for smooth display. Different colors for marks, legends, alarms to ensure easy observation.

Regular type Yellow or green echoes in 16 levels

or 3 colors depending on echo strengths

2. Minimum range and discrimination Meets 35 m HSC requirements

3. Range scales 0.125, 0.25, 0.5, 0.75, 1.5, 3, 6, 12,24, 48, 96

Note:

Max. range for Japanese version is

FR-2115/2115-B: 72 nm, Other: 120 nm

4. Range accuracy 1% of range or 15 m, whichever is the greater

5. Bearing discrimination Better than 2.5° except 9 ft S-band radiator. Accuracy ±1°

6. Presentation Head-up, Head-up TB, North-up, TM Sea or ground stabilization

7. Plotting facilities

EPA 10 targets manual plotting (standard).

Not operational in ARPA mode.

ARPA Automatic Radar Plotting Aid for 30

targets automatically or manually acquired, dynamic and static trial maneuver, complies with A.823(19).

Common features Sea and ground stabilized vectors

and target trails, 3 target data readout at a time

8. Radar map Nav lines, coastlines, buoys, etc. produced by operator as required by IMO and IEC standards. 150 points x 10 areas stored in EEROM.

9. Guard zone 2 GZs at 3 and 6 nm in width of 0.5 nm, any sector, in ARPA mode.

10. Target alarm zone 1st zone within 3-6 nm, 2nd zone anywhere

11. Target trails Plotted in light blue not to interfere with radar picture, intervals 15, 30 s, 1, 3, 6, 15, 30 min, true or relative on RM mode; true only in TM mode.

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12. Parallel index line Choice of 2, 3 or 6 lines

INTERFACE IEC 61162-1 OSD, RSD, TTM, etc. (LISTENER 2 mA at 2 V, TALKER

60 mA max.)

Analog RGB video, H/V sync for VDR with

optional interface board

Gyrocompass Built-in interface for sync signal

20-50 V, 50-400 Hz, or stepper 20-50 V

Speed log IEC 61162-1, contact closure or

200/400/500 pulses/nm

EQUIPMENT LIST Standard

1 Display unit (Separated to Monitor, Processor unit and Control unit for –B type model) 2 Antenna unit 3 Transceiver unit for TR down version; FR-2125W/2135SW/2125W -B/2135SW-B 4 Power supply unit for FR-2155/2135S/2135SW/2165DS/2155-B/ 2135S-B/2135SW-B/2165DS-B

Option

1 Waveguide for TR down version 2 Gyro interface GC-8 (built-in type) 3 Interswitch box RJ-7, RJ-8 4 Performance monitor PM-30 (X), PM-50 (S) 5 42 rpm scanner motor for HSC

(FR-2115/2115B, 2125/2125B only)

6 45 rpm scanner motor for HSC

(FR-2135S/2135S-B only)

7 Interface unit IF-2300 (Mandatory for IMO radar)

8 ARPA board ARP-26 (Mandatory on HSC) 9 Video plotter board RP-26 10 ROM card (for digital charts), RAM card (for custom data) for RP-26, expanded radar map 11 Sub display FMD-8001 (R-type)

POWER SUPPLY FR-2115/2115-B: 24 V, 9.6 A; 32 V, 7.2 A; 230 VAC, 2.4 A FR-2125/2125-B: 24 V, 10.8 A; 32 V, 8.2 A; 230 VAC, 2.7 A FR-2135S/2135S-B: Display/Transceiver unit 230 VAC, 2.1 A Antenna unit 200/220/380/440 VAC, 3ø,

1.4 A FR-2155/2155-B: Display/Transceiver unit 230 VAC, 5.7 A Antenna unit 200/220 VAC, 0.7A;

24 VDC, 0.6 A FR-2165DS: Display/Transceiver unit 115 VAC, 5.7 A Antenna unit 24 VDC, 10.9A FR-2125W/2125W-B: Display/Transceiver unit 230 VAC, 2.1 A Antenna unit 200/220/380/440 VAC, 3ø,

0.7 A FR-2135SW/2135SW -B: Display/Transceiver unit 115 VAC, 5.7 A Antenna unit 200/220/380/440 VAC, 3ø,

1.4 A

X-Radiation None of the equipment or any device used in it will not give rise to dose rate > 5 µJ/kgh (0.5 mrem/h) at 50 mm.

Electromagnetic radiofrequency radiation

MODEL RADIATOR TYPE Distance to 100 W /cm

Distance to 10 W/cm2

RF power density on

antenna aperture FR-2115 XN12AF (4’) 0.1 m worst case 3.5 m 150 W/cm2 FR-2115-B XN20AF (6.5’)

(X, 12 kW) XN24AF (8’) 1.4 m 70 W/cm2 FR-2125/2125W XN12AF (4’) 1.1 m worst case 10.0 m worst case 200 W/cm2 worst case FR-2125-B XN20AF (6.5’) FR-2125W-B (X, 25 kW) XN24AF (8’)

SN30AF (10)

- 0.7 m FR-2135S/2135SW FR-2135S-B FR-2135SW-B (S, 30 kW)

SN36AF (12) 0.5 m

FR-2165DS SN4A (8’) - 1.2 m (S, 60 kW) SN5A (9’) 1.0 m FR-2155 XN4A (8’) - 0.7 m FR-2155-B (X, 50 kW) XN5A (10’) 1.6 m

FR-2135S/2135SW SN-30AF: Not available in Japan.

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Category of Equipment Units

Display unit (Monitor, Processor unit, Control unit) To be installed in a Protected area Power supply unit To be installed in a Protected area RF Transceiver unit To be installed in a Protected area Antenna unit To be installed in an Exposed area Performance Monitor To be installed in an Exposed area

Precautions for high speed targets

! Assume your ship is making 40 kt and a target ship is approaching at 40 kt right toward you.

Then the relative speed is 80 kt. With the antenna revolving at 42 rpm, the target blip appears jumping to a new location 59 m nearer. This jump corresponds to 19 mm on the 300 mm display using the 0.25 nm range scale. On such a short range you may lose the track of target in the midst of sea clutter, random noise or other targets. Use one step larger range scale.

! ARPA can fail to track a target when the relative speed exceeds 100 kt.

Page 16

xiv

CONFIGURATION OF FR-2105 SERIES RADAR AND ARPA

Your RADAR or ARPA is model FR-21xx

consisting of checked component units. (Check by yourself or your service representative)

FR-2155/2135S/2165DS

ANTENNA UNIT

TRANSCEIVER UNIT

For FR-2125W/2135SW

FR-2125W/2135SW

Display unit

115/230 VAC , 1φ, 50/60Hz 115 VAC , 1φ, 50/60 Hz (FR-2155/2165DS)

Antenna unit

See the table in below

Display unit

115/230 VAC , 1φ, 50/60 Hz (FR-2125W/2135SW)

Antenna unit

See the table in below

Please specify power supply when ordering. Optional transformer is required for other mains.

115/230 VAC , 1φ, 50/60 Hz (Ant and disp for FR-2115/2125)

Gyro Interface

ARPA board

ARP-26

Video Plotter

RP-26

Power Supply Unit PSU-001 (For FR-2155/2165DS)

Power Supply Unit PSU-004

Performance Monitor (option)

PM-30 for X-band PM-50 for S-band

Power Supply Unit PSU-004

DISPLAY UNIT RDP-124

FR-2115/2125

Interswitch

Gyro

Converter

External Buzzer

SDME (pulse)

Gyro

EPFS

Other Radar system

Optional Supply

For antenna unit

For display unit

(FR-2155/2165DS)

For antenna unit

For display unit

Waveguide or Coax cable

115/230 VAC , 1φ, 50/60 Hz

ANTENNA UNIT

Power

Interface

IF-2300

SDME (VBW) GYRO (HDT)

ARPA data (TTM)

ANTENNA UNIT

FR-2115 FR-2115-B

RSB-0074 (24 rpm, 24VDC): Motor D8G-516

RSB-0075 (42 rpm, 24VDC): Motor D8G-571 --- HSC X-band FR-2125 FR-2125-B

RSB-0074 (24 rpm, 24VDC): Motor D8G-516

RSB-0075 (42 rpm, 24VDC): Motor D8G-571571 --- HSC X-band FR--2155 FR-2155-B

RSB-0049 (16 rpm (50Hz)/20 rpm (60 Hz), 200/220 VAC, 3ø: Motor GOB-8222

RSB-0050 (20 rpm, 24VDC): Motor RM-6585 FR-2125W FR-2125W-B

RSB0076 (21 rpm (50Hz)/26 rpm (60Hz), 200/220 VAC, 3ø): Motor RM-8123

RSB0077 (21 rpm (50Hz)/26 rpm (60Hz), 380/440 VAC, 3ø): Motor RM-8124

RSB0078 (21 rpm (50Hz)/26 rpm (60Hz), 100 VAC, 1ø): Motor RM-8247 FR-2135S FR-2135S-B

RSB0026 (21 rpm (50Hz)/26 rpm (60Hz), 200/220 VAC, 3ø): Motor RM-7398

RSB0031 (21 rpm (50Hz)/26 rpm (60Hz), 380/440 VAC, 3ø): Motor RM-7435

RSB0088(45 rpm, 220 VAC, 3ø 50Hz): Motor RM-9519 --- HSC S-band

RSB0089 (45 rpm, 220 VAC, 3ø 60Hz): Motor RM-9520 --- HSC S-band

RSB0090 (45 rpm, 440 VAC, 3ø 60Hz): Motor RM-9521 --- HSC S-band FR-2135SW FR-2135SW-B

RSB0027 (21 rpm (50Hz)/26 rpm (60Hz), 200/220 VAC, 3ø: Motor RM-7398

RSB0032 (21 rpm (50Hz)/26 rpm (60Hz), 380/440 VAC, 3ø: Motor RM-7435 FR-2165DS RSB0051 (21 rpm, 24 VDC): Motor RM-6585

Page 17

CONFIGURATION OF FR-2105-B SERIES RADAR AND ARPA

Your RADAR or ARPA is model FR-21xx -B

consisting of checked component units. (Check by yourself or your service representative)

FR-2155-B/2135S-B

ANTENNA UNIT

TRANSCEIVER UNIT

For FR-2125W/2135SW

FR-2125W-B/2135SW-B

Display unit

115/230 VAC , 1φ, 50/60Hz 115 VAC , 1φ, 50/60 Hz (FR-2155-B)

Antenna unit

200 VAC , 3φ, 50 Hz (FR-2135S-B) 220 VAC , 3φ, 60 Hz (FR-2155-B/2135S-B) 380 VAC , 3φ, 50 Hz (FR-2135S-B) 440 VAC , 3φ, 60 Hz (FR-2135S-B)

Display unit

115/230 VAC , 1φ, 50/60 Hz (FR-2125W-B/2135SW-B)

Antenna unit

230 VAC , 1φ, 50/60 Hz (FR-2125W-B) 220 VAC , 3φ, 60 Hz (FR-2135SW-B) 380 VAC , 3φ, 50 Hz (FR-2125W-B/2135SW-B) 440 VAC , 3φ, 60 Hz (FR-2125W-B/2135SW-B)

Please specify power supply when ordering. Optional transformer is required for other mains.

115/230 VAC , 1φ, 50/60 Hz (Ant and disp for FR-2115-B/2125-B)

Gyro Interface

ARPA board

ARP-26

Video Plotter

RP-26

Power Supply Unit PSU-001 (For FR-2155-B)

Power Supply Unit PSU-004

Performance Monitor (option)

PM-30 for X-band PM-50 for S-band

Power Supply Unit PSU-004

Processor unit RPU-011

FR-2115-B/2125-B

Interswitch

RJ-7/RJ-8

Gyro

Converter

External Buzzer

SDME (pulse)

Gyro

EPFS

Other Radar system

Optional Supply

For antenna unit

For display unit

(FR-2155-B)

For antenna unit

For display unit

Waveguide or Coax cable

115/230 VAC , 1φ, 50/60 Hz

ANTENNA UNIT

Power

MONITOR RDP-124-M-ES

CONTROL UNIT RCU-011

Interface

IF-2300

SDME (VBW)

GYRO (HDT)

ARPA data (TTM)

Note: The Display unit RDP-124 for FR-2105 series radar is separated into the Monitor RDP-124-M-ES, the Processor unit RPU-011 and the Control unit RCU-011 for FR-2105-B series radar.

Page 18

-1.

Chapter 1 OPERATION

Before turning on the radar, make sure that there is no one near the antenna unit.

Serious injury or even death may result if a rotating antenna strikes someone standing nearby.

DANGERDANGER

Power switch

Control head

1.1 Turning on the Power

The POWER switch is located at the left corner of the control head. Push it to switch on the radar system. To turn off the radar, push it again. The screen shows the bearing scale and digital timer in approximately 15 seconds after power-on. The

timer counts

down three minutes of warm-up time. During this period the magnetron, i.e., transmitter tube, is warmed for transmission. When the timer has reached 0:00, the indication STBY appears indicating that the radar is now ready to transmit pulses.

In warm-up and standby condition, you will see the message BRG SIG MISSING. This is normal because a bearing (azimuth) signal is not yet generated when the antenna is not rotating. ON TIME and TX TIME values shown at the bottom of the screen are the time counts in hours and tenths of hour when the radar has been powered.

Page 19

-1.

1.2 Transmitter ON

When the STANDBY status is displayed on the screen, press the transmit switch labeled STBY/TX on the control panel of the display unit.

The radar is initially set to previously used range and pulsewidth. Other settings such as brilliance levels, VRMs, EBLs and menu option selections are also set to previous settings.

The transmit switch toggles the radar between STANDBY and TRANSMIT status. The antenna stops in STANDBY status and rotates in TRANSMIT status.

Quick Start

Provided that the radar was once in use with the transmitter tube (magnetron) still warm, you can turn the radar into TRANSMIT condition without 3-minutes standby. If the Power Switch has been turned off by mistake or the like and you wish to restart the radar promptly, turn on the Power Switch not later than 10 seconds after power-off.

Notes:

1) If the antenna does not rotate in TRANSMIT status, check whether the antenna switch in

the tuning compartment is in the OFF position.

2) The magnetron ages with time resulting in a reduction of output power. It is highly

recommended that the radar be set to STANDBY status when not used for an extended period of time.

Page 20

-1.

1.3 Control Head

OFF

CENTER

EBL

TARGET

TRAILS

CANCEL

PANEL BRILL

VECTOR

CHART

ALIGN

CU, TM RESET

MODE

LOST

TARGET

MARK

A/C

AUTO

ENTER

TARGET CANCEL

TARGET

DATA

ACQ

AUDIO

OFF

RADAR

PLOT MENU

NAV

BRILLIANCE A/C RAIN A/C SEA GAIN

OFF ON

VRM

STBY

RANGE

OFF ON

EBL

ON OFF ANTENNA

TUNE

DEGAUSS ERROR

#1 #2

#3 #4

POWER

AUDIO OFF

Acknowledges audible alarms, no effect on visual alarms.

BRILLIANCE

Adjusts the brightness of entire screen.

A/C RAIN

Suppresses clutter from rain, snow, clouds.

A/C SEA

Suppresses sea clutter to improve the short range discrimination.

GAIN

Adjusts the radar sensitivity.

RADAR MENU

for setting various parameters for radar operation and radar map.

NAV MENU

Sets parameters for nav info.

PLOT MENU

for plotting

TRANSMIT/STANDBY

RANGE Keys

Select the range scales.

VRM control and on/off keys Pressing ON key toggles between NO.1 and NO.2 VRMs.

TRACKBALL

Shifts the cursor for plotting, entering reference points, etc.

FUNCTION Keys #1: Set-up 1 #2: Set-up 2 #3: Set-up 3 #4: Set-up 4

EBL control and on/off keys Pressing ON key toggles between NO.1 and NO.2 EBLs.

Page 21

-1.

OFF

CENTER

EBL

OFFSET

TARGET

TRAILS

CANCEL

PANEL

BRILL

VECTOR

CHART

ALIGN

CU, TM RESET

MODE

LOST

TARGET

MARK

A/C

AUTO

ENTER

TARGET CANCEL

TARGET

DATA

ACQ

AUDIO

OFF

RADAR

PLOT

NAV

(3)

(2)

(1)

(4)

(12)

(5)

(11) (6)

(7),

(16)

(14)

(15)

(8)

(9)

(10)

(13)

1 MODE Selects presentation modes: Head-up, Head-up TB, North-up, Course-up and True Motion.

2 PANEL BRILL Adjusts brightness of control panel. 3 HL OFF Temporarily erases the heading line. 4 OFF-CENTER Activates and deactivates off-centering of the own ship position. 5 EBL OFFSET Activates and deactivates off-centering of the EBL origin. 6 C U, TM RESET Resets the heading line to 000° in course-up mode; moves own ship

position to 75% radius in stern direction in the True Motion mode. 7 A/C AUTO Reduces sea clutter at preset level. Permits manual override by A/C SEA and

A/C RAIN controls. 11 TARGET TRAILS CANCEL Erases target trails.

Keys for EPA or ARPA (optional)

8 ACQ key Acquires a target after selecting it by trackball. 9 TARGET DATA Displays the acquired target data for 2 or 3 targets at a time. 10 TARGET CANCEL Terminates plotting of a specified target or all tracked targets. 12 VECTOR Select vector mode; true or relative. 13 LOST TARGET Silences the lost target audible alarm and erases the lost target symbol. 14 CHART ALIGN Aligns chart with the radar display.

15 MARK Enters/erases mark. 16 ENTER Used to save settings on menu screen. Keys 0-9 Select video plotting symbols. Also used for entering numeric data in any mode as

applicable.

Page 22

-1.

1.4 CRT Brilliance

The BRILLIANCE control on the control head of the display unit adjusts the entire screen brightness. Note that the optimum point of adjustment varies with ambient light conditions, especially between daytime and nighttime.

BRILLIANCE

A/C RAIN GAINA/C SEA

Brilliance control

Note: The CRT brilliance should be adjusted before adjusting relative brilliance levels on the BRILLIANCE menu to be explained later.

1.5 Tuning the Receiver

Tuning method can be selected at RADAR 3 menu; auto or manual.

1. Press the RADAR MENU key.

2. Press [0], [0], [2], [0] and [0] in sequence to reach the RADAR 3 menu item.

3. Press the [9] key twice to change between Auto and Manual.

4. Press the ENTER key to confirm your selection.

5. Press the RADAR MENU key to close the menu.

Automatic tuning

The radar receiver is tuned automatically each time the power is turned on; thus, there is no front panel control for tuning. The tuning indicator and the label AUTO TUNE at the top right corner of the display unit show the tuning circuit is working.

Manual tuning

If you are not satisfied wi t h the curre nt t une setti ng, fol low these steps t o fine-tune t he recei ver:

TUNE control

ERROR lamp (See next page.)

1. Set the tuning method to manual as described above.

2. While observing the picture on the 48 mile scale, slowly adjust the TUNE control in the

tune compartment and find the best tuning point.

3. Make sure that the radar has been set to the best tuning point. This condition is where the

tuning indicator lights to about 80% of its total length. Note that the tuning indicator will never extend to full length.

Page 23

-1.

Video Freeze-up Recovery

Video freeze-up or lock-up can occur unexpectedl y on any di gital rast er scan r adars. T his is mainl y caused by heavy spike noise in the power line and can be noticed by carefully watching the nearly visible sweep line. If you suspect that the picture is not updated every scan of the antenna or no key entry is accepted notwithstanding the apparently nor m al pict ures, do Quick Start to restore nor mal operation.

1. Turn off the Power Switch and within 10 seconds turn it on again.

2. Press the Transmit switch labeled STBY/TX for transmit condition. NOTE: This equipment has self-diagnostic function to check operational software periodically. If

any trouble has been found, the ERROR lamp lights. In this case, do the above procedure.

Page 24

-1.

1.6 On-screen Legends and Markers

A/C AUTO NOISE REJ OFFCENTER Long-1 EBL >287.2° R<

240.0° R

12/

2NM

+ 4.2NM

320.2° R

HEAD UP RM

PULSE 1 M1

EAV 1 ES1

Disp 1 ANT 1 MAIN LOG F 10.0 KT SOG SB -1.0 KT

TRUE TRAIL 3MIN 1:25 TGT ALARM 1 TGT ALARM 2

VRM

>10.75NM<

7.00NM

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Cursor position from OS

Function key selected

North marker

Set & Drift values are accessible on RADAR MENU.

Dual-axis SDME F: Fore/aft speed (- sign for reverse). SB: Port/stbd (-sign for port)

Heading line

Target Alarm Zone (Radar) or Guard Zone (ARPA), 1st zone between 3 and 6 nm, 2nd zone anywhere.

X-Band

IR3

HDG 155.0° T SPD 12.0KT BT LOG

ARPA AUTO-MAN TRUE VEC 6MIN GRD STAB HISTORY 6MIN

12MAR 1998

13:28

... SIGNAL MISSING ... GYRO LOG EPFS TRIGGER VIDEO AZIMUTH HEAD LINE ... ARPA ALARM ... COLLISION GUARD LOST TARGET FULL (AUTO + MAN)

Heading marker

Stern marker

>140.9° <

Orientation of Parallel Index Lines

INDEX LINE

SET & DRIFT

0 20 40 60 80 100

-30 20 10

WATCH 11:28

AUTO TUNE

RNG 3.5NM BRG 25.5°R

01 CSE 264.0°T BT TRU

SPD 12.3K BT TRU CPA 2.9NM TCPA94MIN BCR 2.9MIN BCT 94MIN

RNG 4.7NM BRG 78.5°R CSE 264.0°T BT TRU SPD 12.3K BT TRU

02 CPA 2.9NM

TCPA94MIN BCR 2.9MIN BCT 94MIN

DEPTH 21.1m CURRENT 1.2KT

105.7°R

11.3KT

285.6

WPT 2 150.8NM

155.0°T

01 → + 11.7NM

162.5°T

OWN SHIP GPS 34°40.849N 125°18.115E + CURSOR POSN 34°39.039N 135°18.303E

Target Data

This cell indicates 3rd target data or wind/depth data.

SOG*

MAN ALIGNED

Manual chart alignment

*:With the serial speed inputs and SOG selection, if the type of data is changed from SOG to

STW, the label SOG appears in red at the upper right corner on the screen.

Note: For W-type (Washington Ferry), ship's heading and speed are indicated as follows.

HDG 18.5° GYRO SPEED 3.5KT BT NAV

ANT 1 MAIN

AUTO TUNE

Page 25

-1.

DATA DISPLAY

HDG 155.0 T SPEED 12.0KT BT LOG

ARPA AUTO+MAN TRUE VEC 6MIN GRD STAB

HISTORY 6MIN

RNG 4.7NM BRG 25.5 T CSE 264.0 T BT TRU

OWN SHIP [GP] 34 40.849N 125 18.115E +CURSOR POSN 34 39.039N 135 18.303E

11.7NM

162.5 T

WPT 2 150.8NM

155.0 T

DEPTH 21.1m

CURRENT

2.2KT

105.7 T

WIND

11.3KT

285.6 T

12 MAR 1998 13:28 LOCAL

... SIGNAL MISSING ... GYRO LOG EPFS TRIGGER VIDEO AZIMUTH HEAD LINE

.... ARPA ALARM ....

COLLISION GUARD LOST TARGET FULL (AUTO + MAN)

SPD 12.3KT BT TRU CPA 3.4NM TCPA 94MIN BCR 2.9NM BCT 94NM

RNG 2.0NM BRG 180.0 T CSE 200.0 T BT TRU

SPD 10.5KT BT TRU CPA 1.3NM TCPA 15.1MIN BCR 3.0NM BCT 25NM

RNG 2.0NM BRG 180.0 T CSE 200.0 T BT TRU

SPD 10.5KT BT TRU CPA 1.3NM TCPA 15.1MIN BCR 3.0NM BCT 25NM

1:23

HDG: Heading T (True = corrected gyro or magnetic heading)

Speed data is LOG, MAN etc. showing sensor and types.

When set/drift is manually applied, BT appears instead of WT.

(WT: Water tracking mode, BT: Bottom Tracking mode)

SEA STAB: Sea stabilization, displayed objects subject to water,

current.

GND STAB: Ground stabilization, compensated for the current;

stationary objects appear stationary on the display.

Target NO. 01 - 40 in ARPA, 01 - 10 in EPA, automatically assigned.

The numbers are left occupied if targets are lost or intentionally

removed until the full numbers are used up.

Interpreting Course Ex. 180.0 T BT TRU

T: True, referenced to True North BT: Bottom tracking (referenced on the bottom) TRU: Vector orientation

Numerals on division lines Ex. 1:23: Elapsed time since last plot (EPA

only)

This third target data area may be used to indicate the graphics of wind

and depth data if the third target data is not interested.

This display cell shows digital readouts of water depth, ocean currents, wind if associated sensors are in use.

Bearing and range to waypoint

Bearing and range from origin mark to cursor.

Electronic Position-Fixing System, such as GPS, DGPS, DECCA,

LORAN C. Status (Healthy or invalid) will be indicated.

Date and time.

Warning and indications

*Note: When a presentation mode other than north-up true motion is

selected in true vector mode, TRUE VEC indication appears in

red to alert you.

Page 26

-1.

1.7 Degaussing the CRT Screen

Each time the radar is turned on, the degaussing circuit automatically demagnetizes the CRT screen to eliminate color contamination caused by earth's magnetism or magnetized ship structure.

The screen is also degaussed automatically at certain time intervals. While being degaussed, the screen may be disturbed momentarily with vertical lines. If you wish to degauss by manual operation, open the tuning compartment and press the Degauss switch.

BRILLIANCE

A/C RAIN A/C SEA GAIN

STBY

RANGE

OFF ON

EBL

ANTENNA

TUNE

DEGAUSS ERR

#1 #2

#3 #4

POWER

POWER switch

DEGAUSS SWITCH

Tuning compartment

1.8 Initializing the Gyro Readout

With a gyrocompass interfaced with the radar, ship's heading is displayed at the top of the screen. Upon turning on the radar, align the on-screen GYRO readout with the gyrocompass reading by the procedure shown below. Once you have set the initial heading correctly, resetting is not usually required. However, if the GYRO readout goes wrong for some reason, repeat the procedure to correct it.

1. Press the RADAR MENU key to display the FUNCTIONS 1 menu.

2. Press the [0] key twice to display the FUNCTIONS 3 menu.

3. Press the [9] key to select GYRO SETTING option.

4. Rotate the EBL control to adjust the gyrocompass reading.

5. Press the ENTER key to confirm the setting.

Page 27

-1.

10-

1.9 Presentation Modes

This radar has the following presentation modes: Relative Motion (RM) Head-up: Unstabilised

Head-up TB: Head-up with compass-stabilized bearing scale (True Bearing) where the

bearing scale rotates with the compass reading. Course-up: Compass-stabilized relative to ship's intended course North-up: Compass-stabilized with reference to north

True Motion (TM) North-up: Ground or sea stabilized with compass and speed inputs

Selecting presentation mode

Press the MODE key on the control head. Each time the MODE key is pressed, the presentation mode and mode indication at the upper-left corner of the screen change cyclically.

OFF

CENTER

EBL

TARGET

TRAILS

CANCEL

PANEL

BRILL

VECTOR

CHART

ALIGN

CU, TM RESET

MODE

LOST

TARGET

MARK

A/C

AUTO

ENTER

TARGET CANCEL

TARGET

DATA

ACQ

AUDIO

OFF

RADAR

PLOT

NAV

MODE key

Loss of Gyrocompass signal

When the compass signal is lost, the presentation mode automatically becomes head-up and the HDG (heading) readout at the top of the text area shows asterisks ***. Also GYRO appears in red characters at the lower right corner on t he scr een. When the gyrocompass signal is restored, the SET HDG appears at the upper-right corner on the screen. Press the MODE key, and the asterisks and GYRO go off. Align the HDG readout with the gyrocompass reading, referring to the previous section 1.8. Finally press the CANCEL key to erase the message SET HDG.

Page 28

-1.

11-

Presentatio n mode, representative display

Description

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Heading Line

North marker

Heading Marker

Head-up mode

A display without azimuth stabilization in which the line

connecting the cent er with the top of the dis play indic ates own ship’s heading.

The tar get pips are painted at their m eas ur ed dis tances

and in their directions r elative to own ship’s heading.

A shore line on t he bear ing s c ale is the north marker

indicating compass north. A failure of the compass input will cause the north mar k er to disappear and the readout to show asterisks (***.*) and the message GYRO appears in red at the lower-right corner of the screen.

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Heading Line

North marker

Heading Marker

Course-up mode

An azimut h s tabilized display in which a line connecting

the center with the top of the display indic ates own ship’s intended course (namely, own ship’s previous heading just before this mode has been s elec ted).

Target pips are painted at their measured distances and in

their directions r elative to the intended cour s e whic h is maintained at the 0-degr ee pos ition while the heading line moves in accordance wit h s hip’s y awing and c our s e change. This mode is us eful to avoid smearing of pic ture during course change. After a course change, press the [CU, TM RESET] key to reset the picture orientation if yo u wish to continue using t he c our s e- up m ode. The heading line gets back to scale zero.

340

350

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

North marker

earing scale rotates with a compass signal

Heading Marker

Head-up TB (True Bearing) mode

Radar echoes are s hown in the same way as in the

head-up mode. The difference from normal head- up presentation lies in t he or ientation of the bearing sc ale. The bearing scale is compass stabilized. That is, it rotates in accordance with the c om pas s s ignal, enabling you to know own ship’s heading at a glance.

This mode is av ailable only when the radar is interfac ed

with a gyrocompass.

If the compass fails, the bearing scale returns to the state

of head-up mode.

Page 29

-1.

12-

Presentation mode,

representative display

Description

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Heading Line

North

Heading Marker

North-up mode In the north-up mode, target pips are painted at their

measured distances and in their true (compass) directions from own ship, north bearing maintained up of the screen. The heading line changes its direction according to the ship’s heading.

If the gyrocompass fails, the presentation mode changes

to head-up and the north marker disappears. Also, the HDG readout shows asterisks (***.*) And the message GYRO appears in red at the lower-right corner of the screen.

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Heading Line

North

Heading Marker

True motion mode Own ship and other moving objects move in accordance

with their true courses and speed. In ground stabilized TM, all fixed targets, such as landmasses, appear as stationary echoes. In the sea stabilized TM without set and drift inputs, the landmass can move on the screen.

When own ship reaches a point corresponding to 75% of

the radius of the display, it is automatically reset to a point of 75% radius opposite to the extension of the heading marker passing through the display center. Resetting can be made at any moment before the ship reaches the limit by pressing the [CU, TM reset]. Automatic resetting is preceded by a beep sound.

If the compass fails, the mode is changed to the head-up

and the north marker disappears. The HDG readout shows asterisks (***.*) and the message GYRO appears in red at the lower-right corner of the screen.

000 010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

200

210

220

230

240

250

260

270

280

290

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1.10 Selecting the Range Scale

The display range scale is changed by pressing the [+] and [-] keys. The selected range scale and range ring interval are shown at the upper left corner on the screen. When a target of interest comes closer, reduce the range scale so that it appears in 50 - 90 % of the display radius. The range scales are:

0.125−0.25−0.5−0.75−1.5−3−6−12−24−48−96 nm (IMO-type) (Maximum range for Regular type or Japanese version is 72 nm for FR-2115/2115-B or 120

nm for other models)

1.11 Selecting the Pulsel ength

The pulselength in use is displayed at the upper-left position of the screen using the abbreviations shown in the table below.

Appropriate pulselengths are preset to individual range scales and function keys. Therefore, you are not usually required to select them. If you are not satisfied with the current pulselength settings, however, it is possible to change them by the Radar menu operation shown below.

You can choose the pulselength 1 or 2 on the scales 0.5 to 24 nm ranges on FR-2115/2125 models (0.75 to 24 nm ranges on the other models).

Selecting pulsel engt h 1 or 2

1. Press the RADAR MENU key to display the FUNCTIONS 1 menu.

2. Press the [6] key to select PULSELENGTH 1 or 2 as appropriate.

3. Press the RADAR MENU key to close the FUNCTIONS menu.

LABEL P/L in FR-2115/2125/

2115-B/2125-B

P/L in other models

S (Short pulse) - 0.08 µs S1 (Short pulse 1) 0.07 µs S2 (Short pulse 2) 0.15 µs M1 (Medium pulse 1) 0.3 µs 0.3 µs (0.2 µs in F R- 2155, 2165DS) M2 (Medium pulse 2) 0.5 µs 0.6 µs M3 (Medium pulse 3) 0.7 µs L (Long pulse) 1. 2 µs 1.2 µs

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Presetting pulsel engt hs 1 and 2

Pulselength 1 and 2 can be preset on the PULSE WD 1 and 2 menus. Shown below are examples of the pulselength setup procedure:

1. To enable selection of S1 (0.07 µs) and S2 (0.15 µs) pulselength on the 0.5 nm range on

FR-2115/2125/2115-B/2125-B model, select S1 at 0.5 nm on the PULSE WD 1 menu and S2 at 0.5 nm on the PULSELENGTH 2 menu.

2. To enable selection of S2 (0.15 µs) and M1 (0.3 µs) pulselength on the 3 nm range on

FR-2115/2125/2115-B/2125-B model, select S2 at 3 nm in the PULSE WD 1 menu and M1 at 3 nm in the PULSE WD 2 menu.

A longer pulse provides an increased detection range, but with reduced discrimination. If you need discrimination in preference to detection, choose a shorter pulse.

Example: To select S1 (0.07 µs) as Pulselength 1 for the 0.5 nm range, display the PULSELENGTH 1 menu following the steps shown above and hit the [2] key to choose "0.5 NM." Further hit the [2] key until the menu option "S1" is highlighted to the right of "0.5 NM."

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[RADAR MENU] key

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM* 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

[0] key [1] key

[FUNCTIONS 2] 1 [FUNCTIONS 1] 2 BKGD COLOR BLK(GRN CHAR)/ BLK(RED CHAR)/ BLU (ECHO AREA) BLU/ BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/ COLOR* 6 SHIP SPEED LOG/NAV*/MAN MAN = xx.xKT (STW/SOG) 7 SET, DRIFT OFF/MAN SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTION 3]

*: R-type only *1: Fishing mode only (one type of R-type)

[0] key [1] key

[FUNCTIONS 3] 1 [FUNCTIONS 2] 2 [RADAR 1] 3 [FUNCTION KEY 1] 4 [FUNCTION KEY 2] 5 [FUNCTION KEY 3] 6 [FUNCTION KEY 4] 7 RADAR* 1/2 7 INTER SWITCH 8 9 GYRO SETTING EBL = xxx.x° 0 [FUNCTIONS 4]

[2]

[RADAR 1] 1 [FUNCTIONS 3] 2 EBL 1 * REL/TRUE 3 EBL 2 * REL/TRUE 4 VRM 1 *1 NM/km (IMO: nm only) 5 VRM 2 *1 NM/km (IMO: nm only) 6 TRAIL REL/TRUE 7 TRAIL GRAD SGL/MULT 8 [PULSE WD 1] 9 [PULSE WD 2] 0 [RADAR 2]

In RADAR 1 menu, select 8 for pulselength 1 or 9 for pulselength 2. Selection available is as below for FR-2115/2125/2115-B/2125-B:

0.5 nm range S1/S2 0.75 nm range S1/S2/M1

1.5 nm range S1/S2/M1 3 nm range S2/M1/M2/M3 6 nm range M1/M2/M3/L 12-24 nm range M2/M3/L

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1.12 Adjusting the Sensitivity

The GAIN control is used to adjust the sensitivity of the receiver, and thus the intensity of echoes as they appear on the screen. It should be adjusted so that speckled background noise is just visible on the screen.

To become acquainted with the way the GAIN control works, try rotating it between fully counterclockwise and clockwise positions while observing the radar picture. You will notice that clockwise rotation increases the echo intensity level. A low gain setting results in the loss of weak echoes and a reduced detection range. If you turn the GAIN control too far clockwise for an excessive gain setting, desired echoes will be masked in the strong background noise.

BRILLIANCE

A/C RAIN A/C SEA GAIN

STBY

RANGE

OFF ON

EBL

ANTENNA

TUNE

DEGAUSS ERR

#1 #2

#3 #4

POWER

GAIN CONTROL

1.13 Suppressing Sea Clutter

In rough weather conditions returns from the sea surface are received over several miles around own ship and mask close targets. This situation can be improved by properly adjusting the A/C SEA (Anti-Clutter Sea) control.

BRILLIANCE

A/C RAIN A/C SEA GAIN

STBY

RANGE

OFF ON

EBL

#1 #2

#3 #4

A/C SEA CONTROL

A/C SEA control off

A/C SEA control adjusted

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Automatic anti-clutter control

The easiest way to suppress the surface clutter is to use the automatic control. Press the A/C AUTO key. Use of a function key is also a good method for reducing sea clutter. For this purpose, presetting is required. Consult a FURUNO representative.

OFF

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TARGET TRAILS

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CHART ALIGN

CU, TM RESET

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LOST

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MARK

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AUTO

ENTER

TARGET CANCEL

TARGET

DATA

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NAV

A/C AUTO key

CAUTION

The auto A/C function can erase weak target echoes.

Manual anti-clutter control

From the fully counterclockwise position, slowly turn the A/C SEA control clockwise. For optimum target detection, you should leave speckles of the surface return slightly visible.

The anti-clutter sea control is often referred to as STC (Sensitivity Time Control) which decreases the amplification of the receiver immediately after a radar pulse is transmitted, and progressively increases the sensitivity as the range increases.

A common mistake is to over-adjust the A/C SEA control so that the surface clutter is completely removed. By rotating the control fully clockwise, you will see how dangerous this can be; a dark zone is created near the center of the screen and close-in targets can be lost. This dark zone is even more dangerous if the gain has not been properly adjusted. Always leave a little surface clutter visible on the screen. If no surface clutter is observed (on a very calm water), set the control at the fully counterclockwise position.

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1.14 Suppressing Precipitation Cl utter

In adverse weather conditions, clouds, rain or snow produce a lot of spray-like spurious echoes and impairs target detection over a long distance. This situation can be improved by using a function key provided that it is so programmed. If the function key fails to offer a favorable suppression of the rain clutter, adjust the A/C RAIN control on the front control head.

BRILLIANCE

A/C RAIN A/C SEA GAIN

STBY

RANGE

OFF ON

EBL

A/C RAIN CONTROL

A/C RAIN control OFF

A/C RAIN control adjusted

The A/C RAIN control adjusts the receiver sensitivity as the A/C SEA control does but rather in a longer time period (longer range). Clockwise rotation of this control increases the anticlutter effect.

1.15 Interference Rejector

Mutual radar interference may occur in the vicinity of another shipborne radar operating in the same frequency band (9 GHz for X-band, 3 GHz for S-band). It is seen on the screen as a number of bright spikes either in irregular patterns or in the form of usually curved spoke-like dotted lines extending from the center to the edge of the picture. This type of interference can be reduced by activating the interference rejector circuit.

The interference rejector is a kind of signal correlation circuit. It compares the received signals over successive transmissions and suppresses randomly occurring signals. There are three levels of interference rejection depending on the number of transmissions that are correlated. These are indicated by the legends IR1, IR2 and IR3 at the upper-left position of the screen.

Radar interference

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To activate the interference rejector;

1. Press the RADAR MENU key. The following appears.

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

2. Press the [7] key to select the INT REJECT option.

3. Successive presses of the key increase the effect of interference rejection, up to level 3. A

fourth press deactivates the interference rejector. Switch off the interference rejector when no interference exists; otherwise weak targets may be lost.

Note: For stable reception of certain types of radar beacons (Racons) or SART (Search and Rescue Radar Transponder) as required by SOLAS 1974 as amended 1988 (GMDSS), it is recommended to turn the interference rejector off.

1.16 Measuring the Range

Use the fixed range rings to obtain a rough estimate of the range to a target. They are concentric solid circles about own ship, or the sweep origin. The number of rings is automatically determined by the selected range scale and their interval is displayed at the upper-left position of the screen.

Procedure

1. Press the RADAR MENU key to display FUNCTIONS 1 menu.

2. Press the [0] key to display FUNCTIONS 2 menu.

3. Press [9] key to display BRILLIANCE 1 menu.

[BRILLIANCE 1] 1 [FUNCTIONS 2] 2 RINGS BRILL OFF/DIM/M1/M2/BRT 3 EBL BRILL DIM/M1/M2/BRT 4 VRM BRILL DIM/M1/M2/BRT 5 +CURSOR BRILL OFF/DIM/M1/M2/BRT 6 CHAR BRILL DIM/M1/M2/BRT 7 MARK BRILL DIM/M1/M2/BRT 8 TRAIL BRILL DIM/M1/M2/BRT 9 HL BRILL DIM/M/BRT

0 [BRILLIANCE 2]

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4. Press [2] key to select RINGS BRILL option.

5. Press [2] key again. Each pressing gradually increase their brightness in 4 steps and fifth

press erases the range rings.

6. Press the ENTER key to confirm you selection.

7. Press the RADAR MENU key to close the menu. Use the Variable Range Markers (VRMs) for more accurate measurement of the range to a

target. There are two VRMs, No. 1 and No. 2, which appear as dashed rings so that you can discriminate them from the fixed range rings. The two VRMs can be distinguished from each other by different lengths of dashes.

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Target blip

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0.66NM

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Active VRM is identified with this marker.

Measuring the range

Press the VRM ON key to display either of the VRMs. Successive presses of the VRM ON key toggle the active VRM between No. 1 and No. 2 and

the currently active VRM readout is circumscribed by >.....<.

Turning the VRM control, align the active variable range marker with the inner edge of the target of interest and read its distance at the lower-right corner of the screen. Each VRM remains at the same geographical distance when you operate the RANGE+ or RANGE- key. This means that the apparent radius of the VRM ring changes in proportion to the selected range scale.

Press the VRM OFF key to key to erase each VRM.

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1.17 Measuring the Bearing

Use the Electronic Bearing Lines (EBLs) to take bearings of a target. There are two EBLs, No. 1 and No. 2, which are toggled by successive presses of the EBL ON key. Each EBL is a straight dashed line extending out from the own ship position up to the circumference of the radar picture. The fine dashed line is the No. 1 EBL and the coarse dashed one is the No. 2 EBL.

Press the EBL ON key to display either of the EBLs. Successive presses of the EBL ON key toggle the active EBL between No. 1 and No. 2 and

the currently active EBL readout is circumscribed by >... <. Rotate the EBL rotary control clockwise or counterclockwise until the active EBL bisects the

target of interest, and read its bearing at the lower-left corner of the screen. The EBL readout is affixed by "R" (relative) if it is relative to own ship's heading, "T" (true) if

it is referenced to the north, as determined by RADAR 2 menu settings. Each EBL carries a range marker, or a short line crossing the EBL at right angles and its

distance from the EBL origin is indicated at the VRM readout whether or not the corresponding VRM is displayed. The range marker changes its position along the EBL with the rotation of the VRM control.

Press the EBL OFF key to erase each EBL.

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Target blip

No.1 EBL

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EBL

32.5°T

298.0°T

Active EBL is indicated with this marker.

Range scale markers on EBLs

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1.18 Collision Assessment by Offset EBL

The origin of the EBL can be placed anywhere with the trackball to enable measurement of range and bearing between any targets. This function is also useful for assessment of the potential risk of collision. To assess possibility of collision:

1. Press the EBL ON key to display or activate an EBL (No. 1 or 2).

2. Place the cursor (+) on a target appearing as threatening (A in the illustrated example) by

operating the trackball.

3. Press the EBL OFFSET key on the mode panel, and the origin of the active EBL shifts to

the cursor position. Press the EBL OFFSET key again to anchor the EBL origin.

4. After waiting for a few minutes (at least 3 minutes), operate the EBL control until the EBL

bisects the target at the new position (A'). The EBL readout shows the target ship's course, which may be true or relative depending on the settings on the RADAR 1 menu.

If relative motion is selected, it is also possible to read CPA (Closest Point of Approach) by using a VRM as shown below (Figure (a)). If the EBL passes through the sweep origin (own ship) as illustrated (Figure (b)), the target ship is on a collision course.

5. To return the EBL origin to the own ship's position, press the EBL OFFSET key again.

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EBL 1

(a) Evaluating the target ship course in RM (b) Target ship on collision course

Page 40

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1.19 Measuring Range and Bearing Between Two Targets

Press the EBL OFFSET key, and place the origin of No. 1 EBL, for example, on a target of interest (target 1 in the illustrated example) by operating the trackball.

Turn the EBL control until the EBL passes through another target of interest (target 2). Turn the VRM control until the range marker aligns with target 2. The active VRM readout at

the lower-right corner of the screen indicates the distance between the two targets. You can repeat the same procedure on third and forth targets (targets 3 and 4) by using No. 2

EBL and No. 2 VRM. Bearing is shown relative to own ship with suffix "R" or as a true bearing with suffix "T"

depending on EBL relative/true settings on the RADAR 1 menu. To return the EBL origin to the own ship position, press the EBL OFFSET key again.

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No.1 VRM

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Target 4

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Target 2

Range marker

No.1 EBL

No.2 EBL

Range marker

Range/bearing between targets 1 and 2

Range/bearing between targets 3 and 4

1.20 Setting a Target Alarm Zone

CAUTION

The target alarm feature should never be relied upon as t he sole m eans for detecting the risk of potential collision. The operator of a ship is not r elieved of the responsibility to keep lookout for avoiding collisions, whether or not the r adar is in use.

The target alarm serves to alert the navigator to targets (ships, landmasses, etc.) entering a certain area with visual and audible alarms.

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The zone has a fixed width of 0.5 nm in the radial direction (depth) and is adjustable only within 3.0 to 6.0 nm from own ship. On the R-type, the outer and inner boundaries can be set at any distance. On any radar type, the sector of the zone can be set anywhere between 0 and 360 degrees in any direction.

To set a target alarm zone:

1. Place the cursor (+) at point "A" (see figure below) using the trackball.

2. Press the RADAR MENU key to show the FUNCTION 1 menu.

3. Press [2] key to set start point (point "A") of the alarm zone. The message TGT ALARM 1

(or 2) SET appears at the bottom-right corner of the screen.

4. Move the cursor (+) to point "B" and press the [2] key again. Then, the target alarm zone as

illustrated is created and the label TGT ALARM 1 (or 2) appears instead of TGT ALARM 1 (or 2) SET at the lower-right corner of the screen.

Note: If you wish to create a target alarm zone having a 360-degree coverage around own ship, set point "B" in almost the same direction (approx. ±3°) as point "A" and press the [2] key.

If you change the range scale to less than half of the TAZ, the warning TGT ALARM 1 (or

2) OUT appears instead of TGT ALARM 1 (or 2).

5. Two alarm zones can be set as described above. Press [ENTER] and [2] keys in that order

while displaying the FUNCTION 1 menu and repeat the above steps.

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Target alarm zone (TAZ) can be set in any sector between 3 and 6 nm on IMO-type, or anywhere on the R-type.

When the radar has an ARPA board ARP-26, a total of 4 alarm zones (2 each TAZ and GZ) may be set.

The 2nd TAZ or 2nd GZ is available only when the 1st TAZ or 1st GZ is valid.

Acknowledging alar m

A target entering the watch zone produces both visual (flashing) and audible (beeping) alarms. To silence the audible alarm, press [2] key shortly on the FUNCTION 1 menu and the label TGT ALARM 1 ACK replaces TGT ALARM 1 on the display.

This will deactivate the audible alarm but will not stop the flashing of the target in the guard alarm zone. To reactivate the audible alarm, press [2] key again on the FUNCTIONS 1 menu.

When an external buzzer is connected, the audible alarm does not stop until deactivation of the guard alarm.

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Deactivating guard alarm

Hold the [2] key depressed for at least 5 seconds on the FUNCTION 1 menu. In the IMO type, deactivation of TAZ 1 deactivates TAZ 2. TAZ 1 and 2 work independent in the Regular type.

Note: The echo watch alarm is given to targets having a certain level of echo strength. This level does not always imply a landmass, reef, ships or other surface objects but can mean returns from the sea surface or precipitation. Properly adjust the GAIN, A/C SEA, and A/C RAIN controls to reduce noise to avoid generation of an alarm against false target.

Inward and outwar d guar d al ar m s

On the R-type, an inward or outward guard alarm can be selected on the RADAR 2 menu. On the IMO type, only the inward guard alarm is available. The inward guard alarm generates visual and audible warnings when a target enters the guard zone from any direction. The outward guard alarm is produced when a target leaves the guard zone (This is not a guard zone by definition but some users find this feature valuable).

(a) Inward guard alarm available on IMO and R-types

(b) Outward guard alarm available on R-type only

1.21 Off-Centering

Own ship position, or sweep origin, can be displaced to expand the view field without switching to a larger range scale. The sweep origin can be off-centered to the cursor position, but not more than 75% of the range in use; if the cursor is set beyond 75% of the range scale, the sweep origin will be off-centered to the point of 75% of the limit.

This feature is not available on the longest range scale. The number of range rings increases keeping the original range intervals unchanged.

To off-center the radar picture:

1. Place the cursor at a position where you wish to move the sweep origin by operating the

trackball.

2. Press the OFF CENTER key. Then, the sweep origin is off-centered to the cursor position.

3. To cancel off-centering, press the OFF CENTER key again.

The picture cannot be off-centered in the true motion mode.

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1.22 Echo Stretch

On long ranges target echoes tend to shrink in the bearing direction, making them difficult to see. On short and medium ranges such as 1.5, 3 and 6 nm scales, the same size targets get smaller on screen as they approach the own ship. These are due to the inherent property of the radiation pattern of the antenna. To enhance target video, use the echo stretch function. There are 3 settings: echo stretch 1 (ES1) to enlarge in bearing direction for long range detection, echo stretch 2 (ES2) to enlarge in range direction and echo stretch 3 (ES3) to enlarge in bearing and range directions.

To activate the echo stretch:

1. Press the RADAR MENU key to show the FUNCTIONS 1 menu.

2. Press the [0] key to display the FUNCTIONS 2 menu.

3. Press the [3] key to select ECHO STRETCH.

4. Press [3] until Echo Stretch option 1, 2, 3 or OFF as desired is highlighted.

5. Press the ENTER key to conclude your selection followed by the RADAR MENU key to

close the FUNCTIONS menu. Selected setting is marked on the left side of the radar display.

[FUNCTIONS 2 ] 1 [FUNCTIO NS 1 ] 2 BKGD COLO R BLK(GRN CHAR) /

BLK(RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLO R YEL /GRN/COL OR* 6 SHIP SPEED LOG//NAV*/MAN

MAN = xx.xKT (STW/SOG) 7 SET, DRIFT OFF/M AN

SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIO N 3 ]

*: R-type only

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ES OFF ES1 - Enlarged in

bearing direction

Use on range 1.5-12

ES2 - Enlarged in

range direction.

Invalid at P/L S1 and

Use on range 1.5-6 nm

ES3 - Enlarged in both

bearing and range

directions

To enlarge more than ES 2

Notes:

1) If the 1.5 nm range is preset with a pulselength of S1 or S2, and the 3 nm scale with S2,

the echo stretch is not available on these range scales.

2) The echo stretch magnifies not only small target pips but also returns (clutter) from sea

surface, rain and radar interference. For this reason make sure these types of interference have been sufficiently suppressed before activating this function.

1.23 Echo Averaging

The echo average feature effectively suppresses sea clutter. Echoes received from stable targets such as ships appear on the screen at almost the same position every rotation of the antenna. On the other hand, unstable echoes such as sea clutter appear at random positions.

To distinguish real target echoes from sea clutter, this radar performs scan-to-scan correlation. Correlation is made by storing and averaging echo signals over successive picture frames. If an echo is solid and stable, it is presented in its normal intensity. Sea clutter is averaged over successive scans resulting in the reduced brilliance, making it easier to discriminate real targets from sea clutter.

To properly use the echo average function, it is recommended to first suppress sea clutter with the A/C SEA control and then do the following:

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1. Press the RADAR MENU key and the [0] key to show the FUNCTIONS 2 menu.

[FUNCTIONS 2 ] 1 [FUNCTIO NS 1 ] 2 BKGD COLO R BLK(GRN CHAR) /

BLK(RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLO R YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xKT (STW/SOG) 7 SET, DRIFT OFF/M AN

SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIO N 3 ]

*: R-type only

2. Press the [4] key to select ECHO AVERAGE.

3. Press [4] until echo average option 1, 2, 3 or OFF as desired is highlighted.

OFF: No averaging effect 1: Helps distinguish targets from sea clutter and suppresses brilliance of unstable

echoes 2: Distinguishes small stationary targets such as navigation buoys. 3: Stably displays distant targets.

4. Press the ENTER key to conclude your selection followed by the RADAR MENU key to close the FUNCTIONS menu.

(a) Echo average OFF (b) Echo average ON

Echo averaging uses scan-to-scan signal correlation technique based on the true motion over the ground of each target. Thus, small stationary targets such as buoys will be shown while suppressing random echoes such as sea clutter. True echo average is not however effective for picking up small targets running at high speeds over the ground.

Echo average is inoperable when a gyrocompass signal is not available. If you wish to use this feature without a gyrocompass signal, consult a FURUNO representative.

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Manual speed entry is done at menu item 6 SHIP'S SPEED on the FUNCTIONS 2 menu which is accessed by pressing the RADAR MENU key.

CAUTION

Do not use the Echo Average function under heavy pitching and rolling loss of target detection can result.

1.24 Electronic Plotting Ai d (EPA)

A maximum 10 operator-selected targets can be plotted electronically to assess their motion trend. Five past positions can be displayed for each of the plotted targets. If you enter a 6th plot on a certain target, the oldest plot (past position) will be erased.

A vector appears when you enter a second plot for the target and is updated each time a new plot is entered. The vector shows the target motion trend based on its latest two plots. The vector origin will move across the screen at a rate and direction defined by the calculated true course and speed until a next manual plotting.

Target data is shown in the data display area which shows: bearing, course, speed, CPA, TCPA, calculated true course of targets, calculated true speed of

targets

A/C AUTO NOISE REJ OFFCENTER Long-1 EBL

287.2° R

240.0° R

12/

2NM

+ 4.2NM

320.2° R

HEAD UP RM PULSE 1 M1

EAV 1 ES1

Disp 1 ANT 1 MAIN LOG F 10.0 KT SB -1.0 KT

TRUE TRAIL 3MIN 1:25 TGT ALARM 1 TGT ALARM 2

VRM

10.75NM

7.00NM

000

010

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EPA time

X-Band

IR3

HDG 155.0° T SPD 12.0KT BT LOG

EPA REL VECTOR 6MIN 3:20

12MAR 1998

13:28

... SIGNAL MISSING ... GYRO LOG EPFS TRIGGER VIDEO AZIMUTH HEAD LINE ... ARPA ALARM ... COLLISION GUARD LOST TARGET FULL (AUTO + MAN)

140.9

INDEX LINE

9.5

0 20 40 60 80 100

-30 20 10

AUTO TUNE

RNG 3.5NM BRG 25.5°R

01 CSE 264.0°T BT TRU

SPD 12.3K BT TRU CPA 2.9NM TCPA6MIN BCR 2.9MIN BCT 6MIN

RNG 4.7NM BRG 78.5°R CSE 264.0°T BT TRU SPD 12.3K BT TRU

02 CPA 0NM

TCPA23MIN BCR 0MIN BCT 23MIN

DEPTH 21.1m CURRENT 1.2KT

105.7°R

11.3KT

285.6

WPT 2 150.8NM

155.0°T

01 → + 11.7NM

162.5°T

OWN SHIP GPS 34°40.849N 125°18.115E + CURSOR POSN 34°39.039N 135°18.303E

Target Data

3:20

1:25

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Target 2 is on a collision course as the extension of the vector goes through the own ship position. Placing the offset EBL will be a help for assessment. TCPA is counted up to 99.9 min and beyond this it is indicated as TCPA > 99.9 MIN.

Note: EPA requires own ship's speed input (automatic or manual) and a heading signal. The vector and data is updated automatically every 1-2 scenes between plot entries, but do not neglect to plot a new position over a long period of time. The accuracy will be reduced. Note the plots will be lost when the compass fails; start the plotting exercise again.

Plotting a target

To perform electronic plotting:

1. Place the cursor(+) on a target of interest by operating the trackball.

2. Press the ACQ key and one of numeric keys, and the plot symbol with number appears at the cursor position.

3. Watching the EPA time shown at the upper right margin of the screen, wait for at least 30 seconds. Place the cursor (+) on the target at its new location, press the ACQ key, and the same numeric key for the target.

The plot symbol moves to the new target position and previous position is marked by a small dot.

4. To acquire other targets, repeat the above steps selecting different plot number.

Note: If a target once plotted is not plotted again within 10 minutes, the warning "UPDATE PLOT" will appear in red on the upper right margin of the screen and the plot symbol of the target flashes. If you want to continue plotting this target, reacquire it within 5 minutes. Otherwise, the target will be regarded as a "lost target" and its plot symbol and target data will be erased. The larger the plotting interval, the less accurate the plotted target data. Plotting of each target should normally be made every 3 or 6 minutes as far as possible. You can use a Watch Alarm to warn yourself every 3 or 6 min or whichever you may set.

Within 5 seconds, you can cancel a last plot by CANCEL key and make a re-entry at a different position. After 5 seconds, the last entry is processed to produce a vector.

True or relati ve vect or

Vectors can be displayed relative to own ship's heading (Relative) or with reference to the north (True). Press the VECTOR key to select the required mode. This feature is available in all presentation modes (gyrocompass must be working correctly). The current vector mode is indicated at the upper-right corner of the screen.

Vector time

Vector time (or the length of vectors) can be set to 30 seconds, 1, 2, 3, 6, 12, 15 or 30 min and the selected vector time is indicated at the upper-right corner of the screen.

1. Press the PLOT MENU key, and [1] key several times until the desired vector time is reached.

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[EPA] 1 VECTOR TIME 30SEC/1/2/3/6/ 12/15/30 MIN 2 COLLISION ALARM OFF/ON

CPA x.x NM*

TCPA xx.x MIN* 3 MARK STD/LARGE 4 PLOT NO. OFF/ON

*: Setting range

CPA: 0.0 to 9. 9 NM TCPA: 1.0 to 99.9 MIN

2. Press the [ENTER] key to confirm your selection.

3. Press the PLOT MENU key to close the menu. The vector tip shows an estimated position

of the target after the selected vector time elapses. It can be valuable to extend the vector length to evaluate the risk of collision with any target.

Target data

The radar calculates motion trends (range, bearing, course, speed, CPA and TCPA) of all plotted targets.

In head-up and head-up true bearing modes, target bearing, course and speed shown in the upper-right target data field become true (T) relative to north or relative (R) relative to own ship in accordance with true/relative vector setting. In north-up, course-up, and True Motion modes, the target data field always displays true bearing, true course and speed over the ground.

Reading the target data

Press the ACQ key and corresponding numeric key, and the following target data is displayed. RNG/BRG (Range/Bearing): Range and bearing from own ship to last-plotted target with

suffix "T" (True) or "R" (Relative) plot symbol. CSE/SPD (Course/Speed): Course and speed are displayed for the last-plotted target with

suffix "T" (True) or :"R" (Relative) plot symbol. CPA/TCPA: CPA (Closest Point of Approach) is a closest range the target will approach to

own ship. TCPA is the Time to CPA. Both CPA and TCPA are automatically calculated. TCPA is counted up to 99.9 min and beyond this, it is indicated as TCPA > *99.9 MIN.

BCR/BCT: BCR (Bow Cross Range) is the range at which target will cross own ship's bow. BCT (Bow Cross Time) is the estimated time at which target will cross own ship's bow. If BCR is negative, BCR/BCT readout should be displayed as *.*.

Terminating t ar get pl otting

With EPA you can plot up to 10 targets. You may wish to terminate plotting of less important targets to newly plot other threatening targets.

By Symbol: To terminate plotting of a certain target, press the TARGET CANCEL key and then press the corresponding plot number key.

With Trackball: Place the cursor (+) on a target which you do not want to be tracked any longer by operating the trackball and press the TARGET CANCEL key.

All Targets: To terminate plotting of all targets at once, press and hold the TARGET

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CANCEL key until all plot symbols and marks disappear in about 3 seconds.

Setting CPA/ TCPA Alarm Ranges

When the predicted CPA of any target becomes smaller than a preset CPA alarm range and its predicted TCPA less than a preset TCPA alarm limit, the EPA releases an aural alarm and displays the warning label COLLISION on the screen. In addition, the EPA symbol changes to a triangle and flashes together with its vector.

Provided that this feature is used correctly, it will help prevent the risk of collision by alerting you to threatening targets. It is important that GAIN, A/C SEA, A/C RAIN and other radar controls are properly adjusted.

CPA/TCPA alarm ranges must be set up properly taking into consideration the size, tonnage, speed, turning performance and other characteristics of own ship.

CAUTION

CPA/TCPA

The CPA/TCPA alarm feature should never be relied upon as the sole means for detecting the risk of collision. The naviga tor is not relieved of the responsibility to keep visual lookout for avoiding collisions, whether or not the radar or other plotting aid is in use.

To set the CPA/TCPA alarm ranges:

1. Press the PLOT MENU key to show the EPA menu.

2. Press the [2] key to select COLLISION ALARM ON. At this point, a highlight cursor

appears at the "CPA x.x NM" field.

3. Enter the CPA alarm range in nautical miles (0.0 to 9.9 nm) without omitting leading

zeroes, if any, and press the ENTER key. The highlight cursor now moves to the "TCPA xx.x MIN" field.

4. Enter the TCPA alarm limit in minutes (1.0 to 99.9 min) without omitting leading zeroes, if

any, and press the ENTER key.

5. Press the PLOT MENU key to close the menu.

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Silencing CPA/TCPA audible alarm

Press the AUDIO OFF key to acknowledge and silence the CPA/TCPA audible alarm. The warning label COLLISION and the flashing of the triangle plot symbol and vector remain

on the screen until the dangerous situation is gone or you intentionally terminate tracking of the target by using the CANCEL key.

Changing size of the plotting symbols

You can change the size of the plotting symbols as the procedure shown below:

1. Press the PLOT MENU key to show the EPA menu.

2. Press the [3] key two or three times until plot symbol size option STD (standard) or

LARGE is highlighted.

3. Press the ENTER key to conclude your selection followed by the PLOT MENU key to

close the PLOT menu.

1.25 Entering Own Ship's Speed

EPA and any azimuth stabilized presentation modes require an own ship speed input and compass signal. The speed can be entered from a speed log (automatic) or through the plotting keypad (manual).

Automatic speed input

1. Press the RADAR MENU key and the [0] key to show the FUNCTIONS 2 menu.

[FUNCTIONS 2 ] 1 [FUNCTIO NS 1 ] 2 BKGD COLO R BLK(GRN CHAR) /

BLK(RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLO R YEL /GRN/COL OR* 6 SHIP SPEED LOG/NAV*/MAV

MAN = xx.xKT (STW/SOG) 7 SET, DRIFT OFF/M AN

SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIO N 3 ]

*:R- type only

2. Press the [6] key to select menu item 6 SHIP SPEED.

3. Press the [6] key to select (or highlight) LOG option.

SOG (Speed-over- the-gr ound) is the Speed Made Good over the ground deter m i ned by EPF S, Ec ho Reference or Dual-axis speed log. It is obtained by a distance between two points over the gr ound divided by the time spent for travelling between those two points

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4. When the serial speed data is selected at the installation menu, select the speed mode,

STW (speed through the water) or SOG (speed over the ground). If pulse speed data is selected, the STB/SOG does not appear.

5. Press the ENTER key to confirm your selection followed by the RADAR MENU key to

close the FUNCTIONS menu. The ship's speed readout at the screen top shows own ship's speed fed from the speed log followed by the label "LOG."

Notes:

1) IMO Resolution A.823(19) for ARPA recommends that a speed log to be interfaced with

an ARPA should be capable of providing through-the-water speed.

2) Be sure not to select LOG when a speed log is not connected. If the log signal is not

provided, the ship's speed readout at the screen top will be blank.

3) SPEED **.* and SIGNAL MISSING “ LOG” appears if no log signal is present for 30 s

while the ship speed has been more than 5.0 kt.

4) With the serial speed inputs and SOG selection, if the type of data is changed from SOG

to STW, the label SOG appears in red at the upper right corner on the screen.

Manual speed input

1. Press the RADAR MENU and [0] key to show the FUNCTIONS 2 menu.

2. Press the [6] key to select menu 6 SHIP'S SPEED.

3. Press the [6] key to select (or highlight) MAN option.

4. Press the ENTER key to confirm selection. At this point, "MAN = XX.X KT" appears on

the FUNCTIONS 2 menu.

5. Enter the ship speed by hitting corresponding numeric keys followed by the ENTER

without omitting leading zeros, if any. For example, if the ship speed is 8 knots, [0] [8] [ENTER].

6. Press the RADAR MENU key to close FUNCTIONS menu. The ship speed readout at the

screen top shows own ship speed entered followed by the label "MAN."

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1.26 Target Trails (Echo Trails)

It is possible to display the trails by the radar echoes of targets in the form of synthetic afterglow. The afterglow can be selected in a single tone or gradual shading as set on RADAR 1 menu.

Trail gradation

Echo trails may be shown in monotone or gradual shading. Gradual shading paints the trails getting thinner with time just like the afterglow on an analog PPI radar.

(Monotone (SGL))

(Gradual shading (MULT))

- Press the [7] key to select menu item 7 TRAIL GRAD (graduation) in step 4, and

- Press the [7] key to select (or highlight) SGL (single tone) or MULT (multiple shading)

option in step 5.

True or relative trails

You may display echo trails in true or relative motion (only true trail on TM). Relative trails show relative movements between targets and own ship. True motion trails require a gyrocompass signal and own ship speed input to cancel out own ship's movement and present true target movements in accordance with their over-the-ground speeds and courses.

(a) True target trails - no smearing of stationary targets

(b) Relative target trails - all targets moving relative to own ship

Note: When true trail is selected on the RM mode, the legend TRUE TRAIL appears in red. No true-relative selection on TM, it is only True trails on TM mode.

To select true or relative echo trail presentation:

1. Press the RADAR MENU key to show the FUNCTIONS 1 menu.

2. Press the [0] key twice for FUNCTION 3 menu, then [2] key to show the RADAR 1 menu.

3. Press the [6] key to select menu item 6 TRAIL.

4. Press the [6] key to select (or highlight) REL (Relative) or TRUE option.

5. Press the ENTER key to confirm your selection; then RADAR MENU key to close the

menu.

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Press [RADAR MENU] key.

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM* 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

Press [0] key.

[FUNCTIONS 2] 1 [FUNCTIONS 1] 2 BKGD COLOR BLK(GRN CHAR)/ BLK(RED CHAR)/ BLU (ECHO AREA) BLU/ BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN MAN = xx.xKT (STW/SOG) 7 SET, DRIFT OFF/MAN SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTION 3]

*: R-type only

Press [0] key.

[FUNCTIONS 3] 1 [FUNCTIONS 2] 2 [RADAR 1] 3 [FUNCTION KEY 1] 4 [FUNCTION KEY 2] 5 [FUNCTION KEY 3] 6 [FUNCTION KEY 4] 7 RADAR* 1/2 8 9 GYRO SETTING

EBL = xxx.x°

0 [FUNCTIONS 4]

[2]

[RADAR 1] 1 [FUNCTIONS 3] 2 EBL 1 * REL/TRUE 3 EBL 2 * REL/TRUE 4 VRM 1 *1 5 VRM 2 *1 6 TRAIL REL/TRUE 7 TRAIL GRAD SGL/MULT 8 [PULSE WD 1] 9 [PULSE WD 2] 0 [RADAR 2]

*1: Fishing mode only (one type of R-type)

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Displaying and erasing echo trails

Press the RADAR MENU and [1] key to activate or deactivate the echo trails feature.

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM* 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

*: R-type only

Each press of the [1] key within 5 seconds cyclically changes echo trail length (time) as below:

OFF - 30 s - 1 min - 3 min - 5 min - 15 min - 30 min - continuous - OFF The current echo trail setting is displayed at the lower-right corner of the screen. Suppose that "3 MIN" has just been selected. If the [1] key is hit on the FUNCTION 1 menu

more than 5 seconds later, echo trails are removed from the display (memory still alive with echo trail timer count going on). Next hitting of the key calls out the echo trails on the screen. To proceed to longer plot intervals, successively push the [1] key with a hit-and-release action. The larger the echo trail length, the larger the echo trail plot interval.

Note: Holding the [1] key depressed for about 3 seconds on the FUNCTION 1 menu will cause a loss of echo trail data so far stored in an memory.

Resetting echo trails

To reset (or clear) the echo trail memory, hold the TARGET TRAILS CANCEL key depressed for about 3 seconds. Echo trails are cleared and the trailing process restarts from time count zero at current echo trail plot interval. When memory assigned to echo trailing becomes the echo trail timer at the lower-right corner of the screen freezes and the oldest trails are erased to show the latest trails.

R/N/W versions: The TARGET TRAILS CANCEL key can be functioned as follows;

(a) Pressing the key within 3 seconds after the first press selects the trail time: 30 seconds, 1

min., and then 3 min.

(b) Pressing the key after more than 3 seconds from the first press tums off/on the trail

display.

memory is cleared. The next press for more than 2 seconds turns on the trail display and new trailing starts.

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1.27 Parallel Index Lines

Parallel index lines are useful for keeping a constant distance between own ship and a coastline or a partner ship when navigating. Index lines are drawn in parallel with the No. 2 EBL (No. 2 EBL must be active). The orientation of the index lines is controlled with the EBL control (without effecting the EBL indication) and the intervals between the lines adjusted with the VRM rotary control (provided that No. 2 VRM is active).

Maximum number of the index line can be set on INITIAL SETTING 3 menu: 2, 3 or 6.

Displaying and erasing the index lines

1. Press the RADAR MENU and [4] key, and the index lines appears.

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM* 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT

0 [FUNCTION 2]

*: R-type only

2. Orient the index lines in a desired direction with the EBL rotary control. The azimuth of

the index lines appear at the left bottom of the screen.

NO.2 EBL

Parallel Index Lines

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Adjusting index line i nt er val s

1. Press the RADAR MENU and [0] key to show the FUNCTIONS 2 menu.

[FUNCTIONS 2] 1 [FUNCTIONS 1] 2 BKGD COLOR BLK(G RN CHA R) /

BLK(RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRET CH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLO R* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xxKT

(STW/SOG) 7 SET, DRIFT OFF/MAN

SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTION 3]

*: R-type only

2. Press the [8] key to select menu item 8 INDEX LINES.

3. Press the [8] key to select (or highlight) No. 2 VRM or MAN (manual) option.

4. Press the ENTER key to conclude your selection.

5. If you have selected MAN in step 3 above, "MAN = XX.XX NM" appears at the bottom of

the FUNCTIONS 2 menu. Enter a desired line interval by hitting numeric keys followed by the ENTER key without omitting leading zeroes, if any. There are choices of 2, 3 and 6 index lines but the number of lines visible on the screen may be less than 6 depending on the line intervals.

6. If you have selected NO. 2 VRM in step 3 above, make sure that the No. 2 VRM is active

and adjust the spacing between the index lines by operating the VRM control.

7. Press the RADAR MENU key to close the FUNCTIONS 2 menu. To erase the index lines;

1. Press the RADAR MENU key and the [4] key.

2. Press the RADAR MENU key.

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1.28 Origin Mark

You can mark any reference points, prominent target or a point of particular interest using the origin mark feature. These marks (max 10) are geographically fixed, i.e., ground stabilized. To display the origin marks, heading signal and own ship position data are required.

To use the origin mark:

1. Place the cursor (+) at a point where you want to place a reference mark by operating the

trackball.

2. Press the RADAR MENU to show the FUNCTION 1 menu.

3. Press [3] key. The origin mark appears at the cursor position of which range and bearing

are indicated at the lower-right section of the screen.

4. To measure the range and bearing to a target of interest from the origin mark, move the

cursor to the target of interest. Then, the range and bearing from the origin mark to the target are shown at the target data display.

5. To enter another origin mark, press the ENTER key and the [3] key in the FUNCTIONS 1

menu. Place the cursor where you want to place the origin mark, then press the [3] key.

6. To erase the origin mark, select the mark number in the FUNCTIONS 1 menu by pressing

the ENTER key and the [3] key repeatedly, and then press the [3] key once again

000

010

020

030

040

050

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070

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090

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Origin mark

EPA REL VECTOR 6MIN WT

RNG 3.4NM BRG 25.5°T CSE 264.0°T

SPD 12.3KT CPA 2.9NM TCPA ***MIN BCR 2.9NM BCT 20MIN

3.1NM

123.5°T

WPT 2 150.8NM

155.0°T

RNG 3.2NM BRG 45.0°T CSE 242°T

CPA 0.2NM TCPA ***MIN BCR **NM BCT **MIN

• Origin marks may be affixed with ID numbers or symbols corresponding to the keys in use. 1 Press the RADAR menu key and [0] [0] [2] [0] and [0] keys to show the RADAR 3 menu. 2 Press the [5] key twice to select the number or symbol. 3 Press the ENTER key to conclude your selection.

R/N/W versions: Pressing a function key can enter an origin mark. Note: To enter an origin mark, Gyro and LL are required. If no LL, select DR through the menu.

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For easier entry, you can use a FUNCTION key as follows.

1. Assign origin mark to one of the four function keys as described in the paragraph 1.33.

2. Use the trackball to place the cursor (+) where you want to display an origin mark.

3. Press the assigned function key and then press a number key. The origin mark appears with

number.

4. To enter another origin mark, repeat steps 2 and 3. If you press the number/symbol key for the origin mark which is already displayed, that

origin mark will disappear. The range and bearing from the last-entered origin mark to the cursor are automatically

displayed in the text data area. To display another origin mark data;

1. Place the cursor on the origin mark whose range and bearing you want to display.

2. Press the function key assigned to origin mark entry twice.

1.29 Zoom

The zoom function is available on the R-type radar only. This enlarges an area of interest as large as twice the normal viewing.

1. Place the cursor (+) close to the point of interest by operating the trackball.

2. Press the RADAR MENU to show FUNCTION 1 menu.

3. Press [5] key. The area around the cursor and own ship is enlarged twice as large as the

original size and the label ZOOM appears at the lower-left corner of the screen.

4. To cancel zoom, press the [5] key again on the FUNCTIONS 1 menu. Note: The zoom feature is inoperative when the display is off centered.

Cursor

(a) Cursor placed at point of interest

Cursor

(b) Zoom in (R-type only)

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1.30 Markers

Heading marker and heading line

The heading marker and the heading line indicate the ship's heading in all presentation modes. The heading line is a line from the own ship position to the outer edge of the radar display area and appears at zero degrees on the bearing scale in head-up mode centered; it changes the orientation depending on the ship orientation in north-up and true motion modes. The heading marker appears as a small circle on the bearing scale to indicate the heading when the display is off-centered or is in north-up or TM mode.

Temporarily erasing heading line, video plotter screen (requires RP-26)

To temporarily extinguish the heading line and video plotter screen to look at targets existing dead ahead of own ship, press the HL OFF key. The heading line reappears when the key is released. Note that the video plotter screen (requires Video Plotter RP-26) is also temporarily erased when the HL OFF key is pressed.

R/N/W versions: Pressing HL OFF key outputs + cursor LL ($RATLL) from J450 on the INT board. OSD and RSD are also output.

North marker

The north marker appears as a short dashed line. In the head-up mode, the north marker moves around the bearing scale in accordance with the compass signal.

Stern marker

The stern marker (a dot-and-dash line) appears opposite to the heading line. This marker can be displayed provided that STERN MK ON is selected on the RADAR 2 menu.

Own ship symbol

The own ship symbol (

) can be displayed/erased on the RADAR 2 menu. The symbol is scaled to indicate the length and beam of the vessel. If the largest dimension of the symbol gets smaller than 6 mm, the symbol will disappear and own ship will be represented with a small dot or circle depending on the range in use.

NOTE: Details should be entered during installation.

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1.31 Menu Keys

Three menu keys are provided on the right hand corner of the control head, RADAR MENU, PLOT MENU and NAV MENU keys.

RADAR MENU: Permits setting of basic radar parameters. PLOT MENU: Permits setting of Electronic Plotting Aids (EPA) parameters or the optional

ARPA ARP-26. NAV MENU: Provides a choice of navigation data for on-screen display. Also selects display

data for the optional Video Plotter.

OFF

CENTER

EBL

OFFSET

TARGET

TRAILS

CANCEL

PANEL

BRILL

VECTOR

CHART

ALIGN

CU, TM

RESET

MODE

LOST

TARGET

MARK

A/C

AUTO

ENTER

TARGET CANCEL

TARGET

DATA

ACQ

AUDIO

OFF

RADAR

PLOT

NAV

Note: Menu automatically goes off in 30 seconds if you do not press any key.

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1.32 RADAR 1, 2 and 3 Menu Settings

Press [RADAR MENU] key.

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM * 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

*: R-type only

Press [0] key.

[FUNCTIONS 2] 1 [FUNCTIONS 1] 2 BKGD COLOR BLK(GRN CHAR)/ BLK(RED CHAR)/ BLU (ECHO AREA) BLU/ BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN MAN = xx.x KT (STW/SOG) 7 SET, DRIFT OFF/MAN SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTION 3]

2 Background color - Character color BLACK ... Green character

BLACK ....Red character

BLUE .....Display area

BLUE BRIGHT BLUE

*: R-type only

Press [0] key.

[FUNCTIONS 3] 1 [FUNCTIONS 2] 2 [RADAR 1] 3 [FUNCTION KEY 1] 4 [FUNCTION KEY 2] 5 [FUNCTION KEY 3] 6 [FUNCTION KEY 4] 7 RADAR* 1/2 8 9 GYRO SETTING EBL = xx.x° 0 [FUNCTIONS 4]

7 RADAR: Select 1 for single radar installation or for connecting to antenna NO. 1 on dual radar installation. , 2 for connecting to antenna NO. 2 on dual radar installation.

Press [2] key.

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[RADAR 1] 1 [FUNCTIONS 3] 2 EBL 1 * REL/TRUE 3 EBL 2 * REL/TRUE 4 VRM 1 *1 NM/KM 5 VRM 2 *1 NM/KM 6 TRAIL REL/TRUE 7 TRAIL SGL/MULT 8 [PULSE WD 1] 9 [PULSE WD 2] 0 [RADAR 2] Press [0] key.

[RADAR 2] 1 [RADAR 1] 2 + CURSOR EBL REL/TRUE 3 NOISE REJ OFF/ON 4 STERN MK* OFF/ON 5 SHIP MK OFF/ON 6 ALARM* 7 KEY BEEP* OFF/L/M/H 8 AUDIO ALARM OFF/L/M/H 9 2ND ECHO REJ OFF/ON 0 [RADAR 3]

8 AUDIO ALARM level : 65/70/80 dB (A)

Press [0] key.

[RADAR 3] 1 [RADAR 2] 2 BARGE MK *2 OFF/ON 3 BARGE SIZE *2 LENGTH=XXX ft WIDTH = xx ft 4 [BARGE INFORMATION ] *2 5 ORIGIN MK DISP No./SYMBOL 6 ORIGIN MK STAB GND/SEA 7 ANTENNA REVOLUTION LOW/HIGH 8 RADAR NO.* 1 /2 9 TUNE MAN/AUTO 0 TUNE INITIALIZE

*: R-type only *1: Fishing mode only (one type of R-type) *2: SM only (one type of R-type)

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1.33 Function Keys

The four function keys (#1-4) on the control head serve for a macro function to instantly select a combination of assigned functions or settings. The function keys provide optimum radar settings for a specific purpose with a single key operation.

Each function key can be assigned a combination of particular radar settings that will be most suited to your specific navigating purpose, and an adhesive label (such as BUOY, HARBOR, COAST or the like) is usually attached to the key top for easy identification of the assigned purpose.

The individual function keys are preset, or programmed, for the following purposes by qualified service personnel at the time of installation using the procedures described in the succeeding paragraphs:

Function keys #1, #2 and #3: Picture setup and specific operation Function key #4: Specific operation or watch alarm

BRILLIANCE

A/C RAIN A/C SEA GAIN

STBY

RANGE

OFF ON

EBL

ANTENNA

TUNE

DEGAUSS ERR

#1 #2

#3 #4

POWER

FUNCTION KEYS #1: SET-UP 1 #2: SET-UP 2 #3: SET-UP 3 #4: SET-UP 4

1.33.1 Picture setup

Suppose that you have been navigating along a coast for hours and now you are approaching a harbor, your final destination. You will have to adjust your radar to change from the settings for coastal navigation to those for harbor approach. Every time your navigating environment or task changes, you must adjust the radar, which can be a nuisance in a busy situation. Instead of changing radar settings case by case, it is possible to assign the function keys to provide optimum settings for often encountered situations.

The radar's internal computer offers several picture setup options to be assigned to each function key for your specific navigating requirements. For instance, one of the function keys may be assigned the buoy detecting function and labeled BUOY on the key top. If you press this key, the radar will be instantly set for optimum detection of navigation buoys and similar objects and the label BUOY is shown at the left margin of the screen. If you re-press the same key, the radar returns to the previous settings.

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The picture setup options assignable to any of the function keys are shown in the table below:

LABEL DESCRIPTION LABEL DESCRIPTION BUOY Optimum setting for detecting

navigation buoys, small vessels and other small surface objects

SHIP Optimum setting for detecting

vessels

SHORT Optimum setting for short range

detection using a range scale of 3 nm or less on calm seas

LONG Optimum setting for long range

detection using a range scale of 6 nm or larger

CRUISING For cruising using a range scale

of 1.5 nm or larger

HARBOR Optimum setting for short range

navigation in a harbor area using a range scale of 1.5 nm or less

COAST For coastal navigation using a

range of 12 nm or less

SEA Transoceanic voyage using a

range scale of 12 nm or larger ROUGH SEA

Optimum setting for rough weather or heavy rain

RIVER Optimum setting for navigation

on a river

Each picture setup option defines a combination of several radar settings for achieving optimum setup for a particular navigating situation. Those involved are interference rejector, echo stretch, echo average, automatic anti-clutter, pulselength and noise rejector settings.

Adjusting these features on a function key menu changes the original function key settings. To restore the original settings for a particular function key, it is necessary to display the relevant function key menu and select appropriate menu options.

Note: Function key presetting requires a good knowledge of optimum radar settings. If you want to change the original function key settings, consult your nearest FURUNO representative or dealer.

1.33.2 Specific operation

Most often used controls are placed on the center panel while less often used controls are provided in the menu. To avoid opening the menus to set up the radar for a particular situation, function keys #1, #2, #3 and #4 may be assigned a combination of the following settings at the time of installation.

- Target trails (See paragraph 1.25.)

- Echo stretch 1,2 or 3 (See paragraph 1.22.)

- Pulselength 1 or 2 (See paragraph 1.11.)

- Echo averaging 1, 2 or 3 (See paragraph 1 .23.)

- Echo color (See paragraph 1.32.)

- Panel illumination

- Marks brilliance

- Noise rejection Provided that the function key is assigned the specific operation feature, press the key to instantly

set the radar for the prese t purpose. The corresponding label will be displaye d at the left margin of the screen. If you re-press the function key, the r a dar returns to the previous settings.

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1.33.3 Watch alarm

The watch alarm sounds an external buzzer at selected time intervals to help you keep regular watch of the radar picture for safety or other purposes. This feature can be assigned to function key #4 with a choice of alarm intervals of 6, 10, 12, 15 and 20 minutes. (See the flowchart for keystroke sequence.)

Provided that function key #4 is assigned the watch alarm feature, just press function key #4 to activate the feature. The label WATCH appears at the lower-left corner of the screen associated with a watch alarm timer counts down from the initial value (e.g., "12:00").

When a preset time interval has elapsed, an audible watch alarm is released and the screen label WATCH turns red and the watch alarm timer freezes at "0:00."

To silence the alarm, press the AUDIO key. The label WATCH turns to normal color and the watch alarm timer is reset to the initial value and starts the count-down sequence again.

If you press the AUDIO OFF key before the selected time interval is reached, the watch alarm timer is reset to the initial value and starts the count-down sequence again.

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1.33.4 Setting for function keys #1/#2/#3

RADAR MENU

[FUNCTIONS 1]

1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM * 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTIONS 2]

[FUNCTIONS 2] 1 [FUNCTIONS 1]

2 BKGD COLOR

BLK (GRN CHAR)/ BLK (RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xKT

(STW/SOG)

7 SET, DRIFT OFF/MAN

SET = xxx.x° DRIFT = xx.xKT

8 INDEX LINES NO.2 VRM/MAN

MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIONS 3]

[FUNCTIONS 3] 1 [FUNCTIONS 2]

2 RADAR 1 3 [FUNCTION KEY 1] 4 [FUNCTION KEY 2] 5 [FUNCTION KEY 3] 6 [FUNCTION KEY 4] 7 RADAR* 1/2 8 INTER SWITCH 9 GYRO SETTING EBL = xxx.x° 0 [FUNCTIONS 4]

[0]

[FUNCTION KEY 1] (PICT) 1 [FUNCTIONS 3]

2 FUNCTION KEY 1 PICTURE/OPERATION 3 PICTURE FUNC1/BUOY/SHIP/

SHORT/LONG/CRUISING/ HARBOR/COAST/SEA/

ROUGH SEA/RIVER*2/BIRD*1 4 INT REJECT OFF/1/2/3 5 ECHO STRETCH OFF/1/2/3 6 ECHO AVERAGE OFF/1/2/3 7 A/C AUTO OFF/ON 8 [FUNC 1 PULSE WD] 9 NOISE REJECT OFF/ON 0 VIDEO CONTRAST 1/2/3

[FUNC 1 PULSE WD] 1 [FUNCTION KEY 1]

2 0.5 NM S1/S2 3 0.75 NM S1/S2/M1 S/M1 4 1.5 NM S1/S2/M1 S/M1 5 3 NM S2/M1/M2/M3 S/M1/M2 6 6 NM M1/M2/M3/L M1/M2/L 7 12-24 NM M2/M3/L M2/M3/L

[8]

[3]

(In the case of FR-2115/2125)

[FUNCTION KEY 1] (OPR) 1 [FUNCTIONS 3]

2 FUNCTION KEY 1 PICTURE/OPERATION 3 OPERATION TARGET TRAILS/ TARGET ALALRM/ARPA/VECTOR TIME * VIDEO PLOT/ZOOM * BKGD COLOR/INDEX LINES/ INT REJECT/2ND ECHO/ORIGIN MARK/ PLS WD 1/PLS WD 2/ ECHO STRETCH 1/2/3 ECHO AVG 1/2/3 ECHO COLOR/ CHAR BRILL/MARK BRILL/ TRAIL BRILL/RINGS BRILL/ EBL BRILL/VRM BRILL/ +CURSOR BRILL/HL BRILL/ PLOT BRLL/L/L BRILL/ CHART BRILL/NOISE REJECT/ BARGE INFORATION*2

[2] [2] to toggle between OPERATION and PICTURE menu.

[4]

*: R-type only *1: Fishing mode only (one type of R-type) *2: SM only (one type of R-type)

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Picture setup default for Function Keys 1, 2 and 3

4. INT Reject

5. ES 6. ES 7. A/C Auto

9. Noise Rejector

P/L on

0.5 nm

P/L on

0.75 nm

P/L on

1.5 nm

P/L on 3 nm

P/L on 65 nm

P/L on 12-24

RIVER 2 1 OFF OFF OFF S1 S1 S1 S2 M1 M2 BUOY 3 2 3 OFF ON S1 S2 M1 M2 M3 L SHIP 3 2 3 OFF ON S1 S2 M1 M2 M3 L SHORT 2 OFF OFF OFF OFF S1 S1 S1 S2 M1 M2 LONG 3 2 3 OFF ON S2 S2 M1 M2 M3 L CRUISING 3 OFF 3 OFF ON S2 S2 M1 M2 M3 L HARBOR 3 OFF OFF OFF OFF S1 S1 S1 S2 M1 M2 COAST 2 OFF OFF OFF OFF S1 S1 S2 M2 M2 L SEA 2 OFF 3 OFF OFF S1 S2 M1 M2 M3 L BIRD 2 OFF 3 OFF OFF S1 S1 S2 M2 M3 L ROUGH SEA

2 OFF 2 ON OFF S1 S2 M1 M2 M3 L

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1.33.5 Setting for function key #4

RADAR MENU

[0]

[6]

Press [2] once or twice to toggle between OPERATION and WATCH ALARM followed by ENTER key.

[FUNCTIONS 1]

1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM * 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTIONS 2]

[FUNCTIONS 2] 1 [FUNCTIONS 1]

2 BKGD COLOR

BLK (GRN CHAR)/ BLK (RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xKT (STW/SOG)

7 SET, DRIFT OFF/MAN

SET = xxx.x° DRIFT=xx.xKT

8 IDX LINES NO.2 VRM/MAN

MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIONS 3]

[FUNCTIONS 3] 1 [FUNCTIONS 2]

2 [RADAR 1] 3 [FUNCTION KEY 1] 4 [FUNCTION KEY 2] 5 [FUNCTION KEY 3] 6 [FUNCTION KEY 4] 7 RADAR* 1/2 8 9 GYRO SETTING EBL = xxx.x° 0 [FUNCTIONS 4]

[FUNCTION KEY 4] (OPR) 1 [FUNCTIONS 3] 2 FUNCTION KEY 4 OPERATION/WATCH ALARM 3 OPERATION TARGET TRAILS/ TARGET ALARM/ARPA/VECTOR TIME * VIDEO PLOT/ZOOM* BKGD COLOR/INDEX LINES/ INT REJECT/2ND ECHO/ORIGIN MARK/ PLS WD1/PLS WD 2/ ECHO STRETCH 1/ 2/ 3 ECHO AVG 1/ 2 / 3 ECHO COLOR/ CHAR BRILL/MARK BRILL/ TRAIL BRILL/RINGS BRILL/ EBL BRILL/VRM BRILL/ +CURSOR BRILL/HL BRILL/ PLOT BRILL/L/L BRILL CHART BRILL/ NOISE REJECT/ BARGE INFORMATION*2

[FUNCTION KEY 4] (WATCH ALARM) 1 [FUNCTIONS 3] 2 FUNCTION KEY 4 OPERATION/WATCH ALARM 3 WATCH ALARM INTERVAL 6/10/12/15/20 MIN

*: R-type only *1: Fishing mode only (one type of R-type) *2: SM only (one type of R-type)

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1.34 Barge information

Do the following to display the barge information. This function is not available in all radar.

1. Press the RADAR MENU, [0],[0],[2],[0] and [0] to reach the RADAR 3 menu.

2. Press [2] key twice to select BARGE MK ON, followed by the ENTER key.

3. Press [3] key to select BARGE SIZE and enter length and width of a barge, followed by the ENTER key.

4. Press [4] key to display BARGE INFORMATION menu.

5. Enter number of barges in first row, followed by the ENTER key.

6. Enter the number of barges for 2nd, 3rd, 4th and/or 5th row followed by the ENTER key. The barge information appears on the radar display.

1.35 Radar Map

A radar map is a combination of map lines and symbols whereby the user can define and input the navigation, route planning and monitoring data on the radar equipment. Map lines are navigational facility whereby the observer can define lines to indicate channels or traffic separation schemes. Also called nav lines, these lines can be ground stabilized to stop them drifting. (Definition in Annex C of IEC 60936-1 and IEC 60872-1)

In this series of radar, a radar map may contain 150 points of mark and line data on one map. 10 maps can the memorized to facilitate the repeated use on the routine navigation area.

The user can create a radar map on-real time base while using the radar for navigation or at leisure time at anchor or while the radar is not being used. Place of a map can be made for any waterways apart from the actual own ship location. The map data is stored on EEROM card which is mounted on the main processor board socket. When the optional Video Plotter board RP-26 and RAM card are installed in the display unit, much more data can be created and copied to another card.

General operation procedure:

1. Press the NAV MENU key to show the NAV INFORMATION 1 menu.

2. Press [2] key to select the SELECT NAVAID operation.

3. Press [2] key again to select navigation data input device, followed by the ENTER key.

4. Also, set other nav data parameters as appropriate referring to the operation flow shown on

the next page.

5. Press the NAV MENU key to close the NAV INFORMATION menu.

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Notes:

1) Own ship position display requires an input from radionavigational equipment such as a

GPS receiver in accordance with the data format as defined by IEC 61162-1.

2) Wind, water current, depth, water temperature are not displayed when relevant sensors are

not fitted and the text are for these is used for displaying another target data.

1.35.1

Making a radar map

1. Press the NAV MENU key to display the NAV INFORMATION 1 menu.

2. Press [1] key to display the RADAR MAP menu.

3. Press the [2] key twice to set MAP ON, then press the ENTER key.

4. Press the [8] key to select the MAP DISP SELECT menu.

[MAP DISP SELECT] 1 [RADAR MAP] 2 DANGER HIGHLIGHT OFF/ON 3 COAST LINE OFF/ON 4 MARK OFF/ON 5 NAV LINE OFF/ON 6 PROHIBITED AREAS OFF/ON 7 BUOY OFF/ON 8 CONTOUR LINE OFF/ON 9 WPT MARK OFF/ON

5. Press appropriate numeric key twice to select ON, then press the ENTER key.

6. Press the NAV MENU key to close the menu.

Mark entry mode

Marks can be entered in 3 different ways.

1. Press the NAV MENU to display the NAV INFORMATION 1 menu.

2. Press [1] key to display the RADAR MAP menu.

3. Press [6] key and further press [6] key to select the entry mode - cursor, L/L or own ship

position.

4. Press the ENTER key followed by the NAV MENU key.

5. Press the MARK key to read the following legends.

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xx xx. xxx N/S

xxx xx. xxx E/W

MARK XX

21 LINE CHANGE 22 MARK CANCEL

CANCEL ENTER MARK CANCEL KEY

*: These appear when L/L mode is selected at the step 3.

6. Select a wanted position, followed by the ENTER key. Positions can be selected either by

the Trackball, lat/lon values or at own ship.

7. Select a desired mark by the corresponding number followed by the ENTER key.

8. Repeat steps 6-7. To enter the same mark selected, simply repeat step 6.

9. To erase a mark entered, enter 22, place the cursor to the mark you want to erase and then

press the CANCEL key.

10. To escape the mark entry mode press the CANCEL key.

Example: How to draw a coastline

1. Press the MARK key.

2. Enter 17 to select Coast Line and press the ENTER key.

3. Place the cursor mark on a required position and press the ENTER key.

4. Place the cursor at a next position and press the ENTER key. One line appears connecting

designated two points.

5. Repeat step 4 to establish the coastline.

6. To enter more than one of the same type of line, after entering one line, enter 21 and press

the ENTER key. Then, repeat step 2 to 5.

7. To draw other lines, enter required line no., for example, enter 18 to inscribe a contour line,

followed by the ENTER key. Repeat step 3.

8. To erase a line segment entered, enter 22, place the cursor to a point and then press the

CANCEL key. For example, if point 4 is erased on the figure below, line segment 3-4 is erased. If point 3 is erased, line segments 2-3 and 3-4 are erased and new line segment 2-4 is generated.

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1.35.2

Storing the map data

When you have made a map, store it with a map number as follows:

1. Press the NAV MENU and [1] key to display RADAR MAP menu.

2. Press [7] key for ENTER MAP menu.

3. Press [2] key and enter map number by numeral key, followed by ENTER key.

4. Press the NAV MENU key to leave this menu.

1.35.3 Displaying radar map

1. Press the NAV MENU and [1] key in order to display the RADAR MAP.

2. Press [3] key and enter a map number you want to display.

3. Press ENTER key.

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

W012

W011

North marker

Heading marker

Waypoint

Navline

Own ship safe contour

Heading line

Planned route

Own ship vector

Approximate coastline

Waypoint

Past position ARPA: Equally time-spaced positions of any targets being tracked. Note-not equally geographically spaced. EPA: Past plot positions may not be equally time-spaced, up to the operator.

Target being tracked

Separation zone

Dangerous side of own ship safe contour may be marked like this.

Concept of Radar map, Ground stabilized

(Above excludes radar pictures. In reality, radar echoes are always displayed)

4. Press [1] and [7] key in order to display the NAV LINE menu.

5. Press [4] key twice to select NAV WIDTH ON and enter navigation width in nautical mile.

6. Press the ENTER key followed by the NAV MENU key.

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1.35.4 Erasing contents of a radar map

1. Press the NAV MENU, [1] and [9] key to display MAP ERASE menu.

2. Press a wanted number key twice to select OFF or ALL, followed by the ENTER key.

[MAP ERASE] 1 [RADAR MAP] 2 DANGER HIGHLIGHT OFF/ALL 3 COAST LINE OFF/ALL 4 MARK OFF/ALL 5 NAV LINE OFF/ALL 6 PROHIBITED AREAS OFF/ALL 7 BUOY OFF/ALL 8 CONTOUR LINE OFF/ALL 9 WPT MARK OFF/ALL

3. Press the NAV MENU key to leave the menu.

[NAV INFOMATION 1]

1 [RADAR MAP] 2 SELECT NAVAID GPS+LC/DEAD RECKONING

3 OWN SHIP POSN OFF L/L 4 POSN xx° xx.xxx N/S xxx° xx.xxx E/W 5 +CURSOR DATA OFF/ L/L 6 WPT DATA OFF/REL/TRUE 7 [NAV LINE] 8 [WAY POINT] 9 WIND DATA OFF/ ON 0 [NAV INFOMATION 2]

Press [NAV MENU\] key.

[NAV INFOMATION 2]

1 [NAV INFOMATION 1] 2 WIND GRAPH OFF/ON 3 WIND UNIT m/s /KT 4 CURRENT DATA OFF/ON 5 CURRENT GRAPH OFF/ON 6 DEPTH DATA OFF/ON 7 DEPTH GRATH OFF/ON 8 DEPTH SCALE 10/20/50/100/ 200/500 9 DEPTH UNIT *1 m/ft 0 [NAV INFOMATION 3]

[NAV INFOMATION 3]

1 [NAV INFOMATION 2] 2 WATER TEMPERATUDE *1 OFF/ON 3 DATE OFF/UTC/LOCAL +00:00H 4 USED WPL* NAV LINE/WP

[RADAR MAP]

1 [NAV INFOMATION 1] 2 MAP OFF/ON 3 MAP NO. MAP xx MAP LIST xx xx xx xx xx xx xx xx xx xx 4 NAV DATA POSN 5 ALIGN +CURSOR DATA OFF/ON 6 MARK ENTRY MODE CURSOR/ L/L /OWN SHIP POSN 7 [ENTER MAP] 8 [MAP DISP SELECT] 9 [MAP ERASE]

[ENTER MAP]

1 [RADAR MAP] 2 ENTEA MAP MAP xx

9 ERASE MAP MAP xx

[WAY POINT]

1 [NAV INFOMATION 1] 2 WPT MARK OFF/ON 3 4 WPT LINE OFF/ON 5 WPT NO. OFF/ON 6 7 8 ARRIVAL ALARM OFF/ON

x.xxNM

[MAP DISP SELECT]

1 [RADAR MAP] 2 DANGER HIGHLIGHT OFF/ON 3 COAST LINE OFF/ON 4 MARK OFF/ON 5 NAV LINE OFF/ON 6 PROHIBITED AREAS OFF/ON 7 BUOY OFF/ON 8 CONTOUR LINE OFF/ON 9

[MAP ERASE]

1 [RADAR MAP] 2 DANGER HIGHLIGHT OFF/ALL 3 COAST LINE OFF/ALL 4 MARK OFF/ALL 5 NAV LINE OFF/ALL 6 PROHIBITED AREAS OFF/ALL 7 BUOY OFF/ALL 8 CONTOUR LINE OFF/ALL

[NAV LINE]

1 [NAV INFOMATION 1] 2 NAV LINE OFF/ON 3 4 NAV WIDTH OFF/ON

x.xxNM

5 WPT NO. OFF/ON 6 7 8 ARRLVAL ALARM OFF/ON

x.xxNM

9 TURNING LINE OFF/ON/REVISED

*: R-type only *1: Fishing mode only (one type of R-type)

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1.36 Suppressing Second-trace Echoes

In certain situations, echoes from very distant targets may appear as false echoes (second-trace echoes) on the screen. This occurs when the return echo is received one transmission cycle later, that is, after a next radar pulse has been transmitted.

To activate or deactivate the second-trace echo rejector:

1. Press the RADAR MENU, [0], [0], [2] and [0] key to show the RADAR 2 menu.

2. Press the [9] key to select menu item 2ND ECHO REJ option.

3. Further press the [9] key to activate (ON) or deactivate (OFF) the second-trace echo

rejector.

4. Press the ENTER key to conclude selection followed by the RADAR MENU key to

close the RADAR menu.

1.37 Displaying External Waypoint and Navigation Line

Waypoint or navigation line defined on another navaid can be displayed by setting WAYPOINT and NAV LINE menu as follows. To display the menu, press the NAV MENU and [8], [2] for waypoint or [7], [2] for navigation line if video plotter is not provided.

[WAYPOINT] 1 [NAV INFORMATION 1] 2 WPT MARK OFF/ON 3 WPT

4 WPT LINE OFF/ON 5 WPT NO. OFF/ON 6 7 8 ARRIVAL ALARM OFF/ON

x.xxNM

[NAV LINE] 1 [NAV INFORMATION] 2 NAV LINE OFF/ON 3 4 NAV WIDTH OFF/ON

x.xxxNM 5 WPT NO. OFF/ON 6

7 8 ARRIVAL ALARM OFF/ALL

x.xxNM 9 TURNING LINE OFF/ON/REVISED

No cross track error correction at turning line

Cross track error correction at turning line

Turning line

Turning

line

TURNING LINE: ON

TURNING LINE: REVISED

Own ship

Navigation line

Course

Track

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1.38 Adjusting Brilliance of Screen Data

You can adjust relative brilliance levels of various marks and alphanumeric readouts displayed on the screen by the steps below:

1. Press the RADAR MENU key to show the FUNCTIONS 1 menu.

2. Press the [0] and [9] key to show the BRILLIANCE 1 menu. To display the BRILLIANCE 2 menu, further press the [9] key.

3. Select a desired menu item by pressing the corresponding numeric key. As an example, press [8] in the BRILLIANCE menu if you want to change the brilliance of target trails.

4. Further press the same numeric key as you pressed in step 3 above to select or highlight a desired brilliance level.

5. Press the ENTER key to conclude your selection followed by the RADAR MENU key to close the FUNCTIONS menu.

RADAR MENU

[0]

[9]

[BRILLIANCE 1]

1 [FUNCTIONS 2] 2 RINGS BRILL OFF/DIM/M1/M2/BRT 3 EBL BRILL DIM/M1/M2/BRT 4 VRM BRILL DIM/M1/M2/BRT 5 +CURSOR BRILL OFF/DIM/M1/M2/BRT 6 CHAR BRILL DIM/M1/M2/BRT 7 MARK BRIL DIM/M1/M2/BRT 8 TRAIL BRILL DIM/M1/M2/BRT 9 HL BRILL DIM/M/BRT 0 [BRILLIANCE 2]

[BRILLIANCE 2]

1 [BRILLIANCE 1] 2 PLOT BRILL OFF/DIM/M1/M2/BRT 3 L/L GRID BRILL DIM/M1/M2/BRT 4 CHART BRILL DIM/M1/M2/BRT 5 SYMBOLS BRILL DIM/M1/M2/BRT

[0]

[FUNCTIONS 1]

1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTIONS 2]

[FUNCTIONS 2] 1 [FUNCTIONS 1]

2 BKGD COLOR

BLK (GRN CHAR)/ BLK (RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 ECHO COLOR YEL/GRN/COLOR* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xKT (STW/SOG)

7 SET, DRIFT OFF/MAN

SET = xxx.x° DRIFT=xx.xKT

8 INDEX LINES NO.2 VRM/MAN

MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTIONS 3]

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The table below describes which menu item adjusts the brilliance of which picture element.

Menu Item Functions adjusted Menu Item Functions adjusted RINGS Fixed range rings EBL Electronic bearing lines NO. 1, 2 VRM Variable range markers NO. 1, 2 + CURSOR Trackball controlled cursor CHAR Alphanumeric readouts MARKS Bearing scale TRAILS Target trails HL Heading Line and stern marker PLOT Plots for EPA and ARP-26 L/L Latitude and longitude grid lines CHART Charts

Note: You should adjust the entire CRT brilliance by operating the BRILLIANCE control before adjusting the respective brilliance levels on the BRILLIANCE 1 and 2 menu.

1.39 Display of Wind/Tide/Depth Information

Wind Wind, oceancurrent and depth sounding data can be displayed in the text cell which is

normally used to indicate third target ship data. Do as below:

1. Press the NAV menu to show the NAV INFORMATION 1 menu.

2. Press [9] key twice to set WIND DATA ON and press the ENTER key.

3. Press [0] key to show NAV INFORMATION 2 menu.

4. Press [2] key twice to set WIND GRAPH ON and press the ENTER key. Echo sounding depth and tide

1. Do the same to indicate ocean current graph and echo-sounding chart. Depth scales can be selected among 10, 20, 50, 100, 200 and 500 m. The echogram shows the last 30 minutes of depths along the ship’s track.

2. Press [0] key to show the NAV INFORMATION menu.

3. To indicate the date and time in UTC, press [3] key twice or three times to select UTC and press ENTER key.

4. To indicate the local time, press [3] key twice or three times and press ENTER key twice. Enter time difference between UTC and local time, followed by the ENTER key.

Note: Wind data and current data require the respective sensors. The depth data requires an

adequate echo-sounding equipment. The echogram shows the last 30 minutes of depths along the ship’s track. Wind vector shows a direction from which the wind blows in, relative to own ship heading, and labeled T *. Wind velocity is a true wind speed as a result of compensating for own ship’s speed and orientation. Ocean current (tide) is the direction to which the current is flowing away from os position, relative to north.

* T in this case means a true value meanwhile T denotes “relative to True North” in the

case of EBLs and target ship vectors.

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-1.60-

OS heading

Current relative to north, full scale 10 kt

Wind direction relative to OS heading, full scale 100 kt. Wind velocity is calculated value to exclude the ship's orientation and speed

Example of Head-up mode

20 10 min

100 m

Present depth

Last 30 minutes of depth

Page 78

-1.61-

1.40 Alarms

The table below summarizes alarms which may occur at various warning conditions.

Warming Audible alarm Visual alarm To quit alarm status GYRO failure 2 beeps HDG label reads “***.*” and the

message SET HDG appears at the lower-left corner of the screen. GYRZO in red.

Display is automatically switched

to head-up mode within 1 min (IEC 60936-1/3.12.2.1).

Match the on-screen HDG

readout with the actual compass reading, if necessary. Then, press the Cancel key to erase the message SET HEADING.

Target alarm

(TAZ)

beeps Target flashes. Press [2] key on Function 1 menu

(Section 1.20).

WATCH alarm beeps WATCH 0:00

(Label WATCH turns red and time

count freezes at 0:00).

Press the AUDIO OFF key. The

label WATCH turns to normal video and the timer is reset

(Section 1.32.3). Own ship lat/lon Cursor lat/lon

none “***.*” In own ship position field

“***.*” In cursor position field

Make sure that own ship position

data is fed from external radionav

equipment. System failure none Message BRG SIGNAL MISSING

at screen bottom. No radar echoes. SYSTEM FAILURE in red at the lower left of the display during test.

Make sure the antenna switch in

the tuning compartment is on.

Incorrect

keystroke

double beep

tone

none Correct keystroke is responded by

a single beep provided that KEY

BEEP ON is selected in initial

settings. Log failure

EPFS failure

2 beeps

Continuous beep

LOG **.* and LOG appears in red,

if no log signal is input for 30 s while the ship speed has been more than 5.0 kt .

EPFS in red (EPFS: electronic position-fixing system) in the warning and indication cell. The indication also appears when the GPS mode is switched between GPS and DGPS.

If the SDME has failed, use the

Manual Speed mode or other

appropriate sensor.

To silence the beep, press the

AUDIO OFF key.

Press the CANCEL key to erase

message which appears when

GPS mode is switched. Message

cannot be erased if position signal

is missing; it is automatically

erased when signal is restored.

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-1.62-

SOG indication

COLLISION

TRUE VECTOR indication

UPDATE PLOT

COLLISION

Guard Zone alarm

GZ OUT alarm

none

Continuous beep

none

Continuous beep

Continouas beep

none

The label SOG (Speed Made Good) turns red at the top data cell when SOG option is selected on the menu and the assoclated SDME (Speed and Distance Measuring Equipment = Speed log) fails to detect a bottom tracking speed, resulting in the "Speed through the water" (STW) mode automatically.

The label TRUE VECTOR turns red in the second data cell when the TRUE Vector is selected in the RM mode, and returns to the normal text color in the North-up TM mode.

If you have failed to enter a next EPA plot with in 10 min, this indication flashes. Plot symbol of the target also flashes.

COLLISION comes on when EPA- or ATA-tracked target is on collision course.

The label CZ appears in red if a target enters to the guard zone. Target is masked by a flashing inverted triangle.

If the range scale has been reduced to make one of GZs positions more than 1.5 times of the range scale, the label GZ OUT appears in red.

The radar does not automatically

reset itself to receive an SOG

data even if the SDME regains a

bottom tracking speed. To erase

SOG indication (red), press keys

[RADAR menu], [0], [6].

Re-acquire the flashing target

within 5 min. Leave it if it is not

important.

Take evasive action or terminate

tracking of target.

Then, visual indication goes off.

Press the AUDIO OFF key to

acknowledge it.

CXhange the range scale of GZ.

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Chapter 2 OPERATION OF ARPA (Option)

2.1 General

The FR-2105 series radar can accommodate an ARPA (Automatic Radar Plotting Aid) module ARP-26 complying with IMO A.823 and IEC 60987-1. This chapter describes the operation of the ARPA. For operation of normal radar, refer to Chapter 1.

Principal specif i cat ions

Acquisition and tracking

• Automatic acquisition of up to 20 targets plus manual acquisition of 10 targets, or fully

manual acquisition of 30 targets between 0.2 and 32 nm. Manual acquisition has a priority over automatic acquisition. Therefore, if 20 targets have been manually acquired, the capacity for automatic acquisition is 10 targets.

• The ARPA automatically tracks all acquired targets, whether manually or automatically

acquired, between 0.1 and 32 nm (0.1 and 24 nm depending on initial setting). Manually acquired targets are indicated in bold symbols and the automatically acquired targets, in

thinner symbols. Vector length: 0.5, 1, 2, 3, 6, 12, 15, 30 min. Orientation: True velocity or relative velocity Stabilization: Sea or Ground as selected with Vector key. Motion trend: Displayed within 20 scans, full accuracy within 60 scans after acquisition. Past positions: Choice of 5, 10 or 20 past positions at intervals of 30 s, 1, 2, 3 or 6 min. Alarms: Visual and audible alarms against targets violating CPA/TCPA limits, lost

targets, targets crossing guard zone, system failure and target full status.

Trial maneuver: Predicted situation appears in 1 min after selected delay (1-60 minutes).

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2.2 Keypads for ARPA

The ARPA uses the keys on the plotting keyboard on the right side of the radar screen and two keys on the control head.

PLOT MENU: Shows/hides ARPA menus. Plot Symbol keys: Select specific plot symbols for

manually acquired targets. TARGET CANCEL: Terminates tracking of a

single target specified by the trackball if the key is pressed with a hit-and-release action. If the key is held depressed for about 3 seconds, tracking of all targets is terminated.

ENTER: Registers menu options selected. VECTOR: Selects true or relative presentation of

target vectors. TARGET DATA: Displays data on one of tracked

targets selected by the trackball. LOST TARGET: Silences the lost target aural

alarm and erases the lost target symbol.

ACQ (on control head): Manually acquires a target. AUDIO OFF (on control head): Silences aural

alarm.

OFF

CENTER

EBL

TARGET

TRAILS

CANCEL

PANEL

BRILL

VECTOR

CHART ALIGN

CU, TM RESET

MODE

LOST

TARGET

MARK

A/C

AUTO

ENTER

TARGET

CANCEL

TARGET

DATA

ACQ

AUDIO

OFF

RADAR MENU

PLOT

NAV

Plotting keypad

CRITERIA OF TRACKING

A target measuring 800 m or more in the radial or circumferential direction is regarded as a landmass and not acquired or tracked. Echoes smaller than 800 m are regarded as targets to be tracked.

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-2.3-

2.3 ARPA Menu Operation

To activate ARPA function;

1. Press the RADAR MENU key.

2. Press [8] key to select ARPA, instead of EPA. Note that the label ARPA appears in the upper-right box on the screen.

Various parameters for the ARPA are set on the ARPA 1 and ARPA 2 menus. To do this, follow the steps shown below:

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [0] key once if you wish to go to the ARPA 2 menu.

3. Select a desired menu item by pressing the corresponding numeric key.

4. Select a menu option by pressing the same numeric key as pressed in step 3 above. If there

is more than one option on the current menu item, you may need to press the numeric key

several times. Press it until the desired option is highlighted. (Note that certain menu items

will prompt you to enter numeric data or to define points on the radar screen with the

trackball.)

5. Press the ENTER key to register settings.

6. Press the PLOT MENU key to close the menu.

Press [PLOT MENU] key.

[ARPA 1] 1 VECTOR TIME 30SEC/1/2/3/6/12/15/30MIN 2 AUTO ACQ OFF/ON 3 AUTO ACQ AREA 3.6NM/[SET] * 4 GUARD ZONE OFF/ON 5 [GUARD ZONE SET] **] 6 TARGET BASED SPEED 7 REFERENCE TARGET VECT OFF/ON 8 COLLISION ALARM OFF/ON CPA x.xKT TCPA xx.xMIN 9 [TRIAL MANEUVER] 0 [ARPA 2]

* SET opens the [AUTO ACQ AREA SET] submenu which reads:

1 [ARPA1] 2 1/2 SET LEFT/RIGHT BOUNDARY CANCEL PREVIOUS AREA: CANCEL

KEY ** This submenu reads: 1 [ARPA 1] 2 1/2 SET LEFT/RIGHT BOUNDARY CANCEL PREVIOUS AREA: CANCEL

KEY

Press [0].

[ARPA 2] 1 [ARPA 1] 2 TRIAL MODE STATIC/DYNAMIC 3 HISTORY OFF/ON 4 HISTORY POINTS 5/10 5 HISTORY INTVL 30SEC/1/2/3/6MIN 6 MARK SIZE STD/LARGE 7 GUARD, ACQ STABILIZE NORTH/CRT 8 [INPUT SIG CHECK] 9 [ARPA TRACK TEST]

0 [ARPA INITIAL SETTING]

Page 83

-2.

2.4 Start-up Procedure

Entering own ship's speed

The ARPA requires own ship's speed and heading data. The speed can be entered automatically from a speed log (SDME, Speed and Distance Measuring Equipment), navaid, or by referencing to a target-based speed (based on 3 max. stationary objects). Manual input is also possible.

Automatic speed input

For speed log input:

1. Press the RADAR MENU key and [0] key to show the FUNCTIONS 2 menu.

Press [

RADAR MENU

] key.

↓

[FUNCTIONS 1] 1 TARGET TRAILS 2 TARGET ALARM 1 or 2 3 ORIGIN MARK 1 to 10 4 INDEX LINES 5 ZOOM* 6 PULSE WIDTH 7 INT REJECT 8 ARPA 9 VIDEO PLOT 0 [FUNCTION 2]

↓

Press [0] key.

[FUNCTIONS 2] 1 [FUNCTIONS 1] 2 BKGD COLOR BLK(GRN CHAR)/

BLK(RED CHAR)/ BLU (ECHO AREA) BLU/

BRT BLU 3 ECHO STRETCH OFF/1/2/3 4 ECHO AVERAGE OFF/1/2/3 5 TARGETS COLOR YEL/GRN/COL OR* 6 SHIP SPEED LOG/NAV*/MAN

MAN = xx.xKT

(STW/SOG) 7 SET, DRIFT OFF/MAN

SET = xxx.x° DRIFT = xx.xKT 8 INDEX LINES NO. 2 VRM/MAN MAN = xx.xx NM 9 BRILLIANCE (1) 0 [FUNCTION 3]

2 Background color - Character color BLACK ... Green character

BLACK ....Red character

BLUE .....Display area

BLUE BRIGHT BLUE

* : R-type only

2. Press the [6] key to select menu item SHIP'S SPEED.

3. Press the [6] key to select (or highlight) LOG option.

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-2.5-

4. Press the ENTER key to conclude your selection followed by the RADAR MENU key to

close the FUNCTIONS 2 menu. The ship's speed readout at the top of the screen shows own ship's speed fed from the speed log preceded by the label "LOG."

Notes:

1) IMO Resolution A.823(19) for ARPA recommends that a speed log to be interfaced with

an ARPA should be capable of providing through-the-water speed data (forward speed).

2) Be sure not to select LOG when a speed log is not connected. If the log signal is not

provided, the ship speed readout at the top of the screen will be blank. In the event of a log error, you can continue plotting by entering a manual speed.

3) If a log signal interval becomes more than 30 seconds with the ship's speed 5 kt or more,

the radar regards the speed log is defective and LOG FAIL appears, reading xx.x KT. If no speed input is present for 3 minutes at below 0.1 kt, the radar regards the log is defective.

Manual speed input

To manually enter the ship's speed with the numeric keys:

1. Press the RADAR MENU key and [0] key to show the FUNCTIONS 2 menu.

2. Press the key [6] to select menu item SHIP'S SPEED.

3. Press the key [6] to select (or highlight) MAN option.

4. Press the ENTER key to conclude your selection. At this point, "MAN = xx.x KT" appears

at the bottom of the FUNCTIONS 2 menu.

5. Enter the ship speed by hitting corresponding numeric keys followed by the ENTER key

without omitting leading zeroes, if any. As an example, if the ship speed is 8 knots, press [0] [8] [ENTER]. For 4.5 knots, [0] [4] [5] [ENTER].

6. Press the RADAR MENU key to close the FUNCTIONS 2 menu. The ship speed readout

at the screen top shows own ship's speed you entered preceded by the label "MENU."

Target-based speed

The use of target-based speed is recommended when:

• The speed log is not operating properly or not connected to the radar.

• The vessel has no device which can measure ship's leeward movement (Doppler sonar,

speed log, etc.) when leeward movement can not be disregarded.

If you select target-based speed, the ARP-26 calculates own ship's speed relative to a fixed reference target. The number of targets may be 1, 2 or 3. They appear as tracked targets, each shown in a small circle, but without a vector. When a plural of objects are selected, the mean value is used for stabilization and speed. Select the number in [PLOT MENU], see section

2.3.

1. Select a small fixed island or any radar prominent point located at 0.2 to 24 nm from own

ship.

2. Place the cursor (+) on the target by operating the trackball.

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-2.6-

3. Press the PLOT MENU key and [6] key followed by the ENTER key.

The reference target mark (see below) appears at the cursor position and the own ship data label changes from "LOG," "NAV" or "MENU" to "REF." Note that it takes 60 scans or approximately 1 min before a new speed is displayed. If tracking has failed for a reference target, the target is marked with a lost target mark (symbol formed with two triangles).

changes to ○

○○

○R in 60 scans

Notes:

1) When the reference target is lost or goes out of the acquisition range, the reference target

mark blinks and the speed reads "xx.x." Select a different reference target in this case.

2) When all targets are deleted, the reference target mark is also deleted and the target-based

speed becomes invalid. The speed is indicated in KTBT where BT means Bottom Track (speed over ground).

3) The vector of the reference target can be displayed by menu operation (ARPA 1 menu).

Canceling target-based speed

To cancel the target-based speed, the PLOT MENU and [6] key. The speed is shown by LOG, NAV* or MANUAL as selected previously.

Deactivating the ARPA

To deactivate the ARPA, press the RADAR MENU key and [8] key twice followed by the ENTER key. Target plotting symbols and the on-screen label ARPA will disappear. The label EPA appears.

2.5 Automatic Acquisition

The ARPA can acquire up to 30 targets (20 automatically and 10 manually or all 30 manually). If AUTO ACQ is selected after more than 20 targets have been manually acquired, only the remaining capacity of targets can be automatically acquired. For example, when 30 targets have been acquired manually, then the ARPA is switched to AUTO ACQ. Only 10 targets can be acquired automatically.

A target just acquired automatically is marked with a broken square and a vector appears within 20 scans of antenna to indicate the target's motion trend. Within 60 scans, the initial tracking stage is finished and the target becomes ready for stable tracking. At this point, the broken square mark changes to a solid circle. (Targets automatically acquired are distinguished from those acquired manually, the targets which are acquired manually are displayed by bold symbol.)

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-2.

Enabling and disabli ng aut o acquisition

1. Press the RADAR MENU key and [8] key twice followed by the ENTER and RADAR

MENU key if the ARPA is not yet activated. Note that the label ARPA appears in the box at the upper-right on the screen.

2. Press the PLOT MENU key to show the ARPA 1 menu.

[ARPA 1] 1 VECTOR TIME 30SEC/1/2/3/6/12/15/30MIN 2 AUTO ACQ OFF/ON 3 AUTO ACQ AREA 3 6/[SET] 4 GUARD ZONE OFF/ON 5 [GUARD ZONE SET ] 6 TARGET BASED SPEED 7 REFERENCE TARGET VECT OFF/ ON 8 COLLISION ALARM OFF/ON CPA x.xKT

TCPA xx.xMIN* 9 [TRIAL M ANEUVER] 0 [ARPA 2] * Setting range: 1.0 t o 99. 9 m in

3. Press the [2] key to select menu item AUTO ACQ.

4. Further press the [2] key to select (or highlight) ON (enable auto acquisition) or OFF

(disable auto acquisition) as appropriate.

5. Press the ENTER key to conclude your selection followed by the PLOT MENU key to

close the ARPA 1 menu. Note that the label AUTO+MAN is displayed in the box at the upper-right on the screen when auto acquisition is enabled; MAN when auto acquisition is disabled.

Note: When the ARPA has acquired 20 targets automatically, the message AUTO TARGET FULL is displayed in the box at the right-hand side of screen.

Auto acquisition areas

Automatic acquisition is performed within 1 or 2 zones. Outside these zones is auto acquisition suppressed zones. The zones can be set at 3-3.5 n and/or 5.5-6.0 nm, or anywhere within 0.2 - 32 nm.

Predefined auto acquisition areas (Menu item: 3 & 6 NM)

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [3] key to select menu item AUTO ACQ AREA.

3. Further press the [3] key to select (or highlight) menu option 3, 6NM.

4. Press the ENTER key to confirm your selection followed the PLOT MENU key to close

the ARPA 1 menu.

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-2.8-

The illustration below shows how the auto acquisition areas are displayed on the screen. Up to 20* targets within the auto acquisition areas are acquired automatically. There is no priority in picking up. It is recommended to use 2 zones on high speed craft.

* If 30 targets have already been acquired manually in the MAN ACQ mode (AUTO OFF on ARPA 1 menu), only 10 more targets can be acquired automatically.

3-3.5 nm

5.5-6 nm

Predefined auto acquisition areas

Free selection of acquisition zones (Menu item: SET)

To set auto acquisition areas with trackball:

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [3] key to select menu item AUTO ACQ AREA.

3. Further press the [3] key to select (or highlight) SET option.

4. Press the ENTER key to conclude your selection. At this point the AUTO ACQ SETTING

menu is displayed at the screen bottom.

[AUTO ACQ AREA SET] 1 [ARPA 1] 2 1/2

5. Press the [2] key to select menu item "1/2" and press the ENTER key. Then, you will see

the message as shown below:

[AUTO ACQ SETTING] 1 [ARPA 1] 2 1/2

SET LEFT/RIG HT BOUNDARY CANCEL PREVIOUS AREA: CANCEL KEY

Page 88

-2.9-

6. Place the cursor at the outer counterclockwise corner of the area (point A) and press the

ENTER key.

7. Place the cursor at the clockwise edge of the area (point B) and press the ENTER key.

0.5 nm

Note: If you wish to create an auto acquisition area having a 360-degree coverage around own ship, set point B in almost the same direction (approx. ±5°) as point A and press the ENTER key.

8. Repeat steps 5 to 7 above if you want to set another auto acquisition area with the trackball.

9. Press the [1] key followed by the PLOT MENU key to close the ARPA 1 menu. An auto acquisition area like the example shown above appears on the display. Note that each

auto acquisition area has a fixed radial extension (width) of 0.5 nm. Note that the auto acquisition areas are preserved in an internal memory of the ARPA even

when auto acquisition is disabled or the ARPA is turned off.

Terminating t racking of targets

When the ARPA has acquired 20 targets automatically, the message AUTO TARGET FULL is displayed in the box at right-hand side of the screen and no more auto acquisition occurs unless targets are lost. You may find this message before you set an auto acquisition area. Should this happen, cancel tracking of less important targets or perform manual acquisition.

Canceling individual targets

Place the cursor (+) on a target to cancel tracking by operating the trackball. Press the TARGET CANCEL key.

Canceling all targets at a time

Press and hold the TARGET CANCEL key down more than 3 seconds. In the automatic acquisition mode, acquisition begins again.

Discriminati on bet w een landmass and true targets

A target is recognized as a landmass and thus not acquired if it is 800 m or more in range or bearing direction.

Page 89

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10-

2.6 Manual Acquisition

In auto acquisition mode (AUTO ACQ ON), up to 20 targets can be manually acquired in addition to 20 auto acquired targets. When auto acquisition is disabled (AUTO ACQ OFF), up to 40 targets can be manually acquired and automatically tracked.

To manually acquire a target:

1. Place the cursor (+) on a target of interest by operating the trackball.

2. Press the ACQ key on the control head. The selected plot symbol is marked at the cursor

position.

Note that the plot symbol is drawn by broken lines during the initial tracking stage. A vector appears in about one minute after acquisition indicating the target's motion trend. If the target is consistently detected for three minutes, the plot symbol changes to a solid mark. If acquisition fails, the target plot symbol blinks and disappears shortly.

(a) Immediately after acquisition, this plot

symbol is shown in broken lines.

(b) Within 20 scans of antenna after

acquisition, a vector appears to show a trend of movement.

acquisition, the plot symbol changes to a small circle indicating steady-state tracking condition.

Notes:

1) For successful acquisition, the target to be acquired should be within 0.2 to 32 nm from

own ship and not obscured by sea or rain clutter.

2) When you have acquired 40 targets manually, the message MAN TARGET FULL is

displayed at the screen bottom. Cancel tracking of non-threatening targets if you wish to acquire additional targets manually. (See "Terminating tracking of acquired targets" on page 2-9.)

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11-

2.7 Changing Plot Symbol Size

Press a desired plot symbol key, and the symbol is enlarged for about 7 seconds. You may also choose plot symbol size. To choose a large or standard size for all plot symbols:

1. Press the PLOT MENU key followed by the [0] key to show the ARPA 2 menu.

2. Press the [6] key to select MARK SIZE.

3. Further press the [6] key to select (or highlight) STANDARD or LARGE as appropriate.

4. Press the ENTER key to conclude your selection followed by the PLOT MENU key to

close the ARPA 2 menu.

CAUTION

TARGET SWAP

When a target being tracked nears another target being tracked, the targets may be “swapped”. When two targets acquired either automatically or manually come close to each other, one of the two may become a Lost Target. Should this happen, manual re-acquisition of the Lost Target may be required after the two have separated.

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12-

ARPA symbols

The symbols used in this equipment comply with

IEC 60872-1.

Item Symbol Status Remarks

Automatically

acquired targets

Initial stage

epvs symbol no. 3

Broken square around an echo to

indicate the target under acquisition and initial stage of tracking, before steady-state tracking.

epvs symbol no. 3

Between 20 and 60 scans of antenna

after acquisition (vec tor still unreliable)

Steady tracking

epvs symbol no. 4a

Solid circle with vector indicating steady

state tracking (60 scans after acquisition)

(flashing)

CPA alarm

epvs symbol no. 8

Plot symbol changes to an equilateral

triangle flashing to indicate the target is predicted to come into CPA or TCPA.

CPA alarm

acknowledge

epvs symbol no. 8

Flashing stops after CPA/TCPA alarm is

acknowledged.

(flashing)

Lost target

epvs symbol no. 9

Lost target is indicated by flashing

diamond symbol. The diamond is formed from two equal triangles.

Manually

acquired targets

Initial stage

epvs symbol no. 3

Plot symbol selected for a target

acquired manually is shown in bold broken lines.

epvs symbol no. 3

Bold broken square for 20 - 60 scans of

antenna after acquisition

Steady tracking

epvs symbol no. 4a

Manual plot symbol in a bold solid circle

(60 scans after acquisition)

(flashing)

CPA alarm

(collision course)

epvs symbol no. 8

Plot symbol changes to an equilateral

triangle flashing if a target is predicted to come into the preset CPA or TCPA.

epvs symbol no. 8

Flashing stops after CPA/TCPA alarm is

acknowledged.

(flashing)

Lost target

epvs symbol no. 9

Lost target is indicated by flashing

diamond symbol. The diamond is formed from two equal triangles (one apex up and the other apex down).

guard zone

alarm

(flashing)

On target passing

through operator-set guard zone

epvs symbol no. 7

Plot symbol changes to an equilateral

triangle, apex down, flashing together with vector if target entering guard zone.

automatic

acquisition area

5.5 - 6.0 nm, 3 -

3.5 nm or anywhere

epvs symbol no. 2

Sector or full circle as selected by the

operator.

Target selected

for data readout

On selected target

epvs symbol no. 12

Target data (range, bearing, course,

speed, CPA and TCPA)

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13-

Reference

target

In 60 scans,

changes to

○○○○

On reference target Used to calculate own ship’s

over-the-ground speed (target-based speed) for ground stabilization.

ARPA symbols (conti nued)

ITEM SYMBOL STATUS

REMARKS

Trial maneuver

(flashing)

Bottom center

EPVS SYMBOL NO. 10

Appears during execution of a trial

maneuver.

Performance

test

X X

(flashing)

Bottom center

EPVS SYMBOL NO. 11A

Appears during execution of a

performance test.

NON-ARPA SYMBOLS for Radar

ITEM SYMBOL STATUS REMARKS

Non-ARPA

symbols

T hes e ar e non- A RP A symbols, but only on

Radar mode. Not available in t he A RP A mode.

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14-

2.8 Adjusting Brilliance of Plot Marks

1. Press the RADAR MENU and [0] key to show the FUNCTIONS 2 menu.

2. Press the [9] and [0] key to show the BRILLIANCE 2 menu.

3. Press the [2] key to select PLOT BRILL.

4. Further press the [2] key to select (or highlight) a desired brilliance level.

5. Press the ENTER key to confirm your selection followed by the RADAR MENU key to

close the BRILLIANCE 2 menu.

Note:

Refer to paragraph 1.37 for the BRILLIANCE menu screen.

2.9 Displ aying Target Data

The ARPA mode (with built-in ARP-26 optional board) provides the full functionality of ARPA as required by the IMO Resolution A.823(19) and IEC 60972-1, including display of range, bearing, course, speed, CPA and TCPA of all plotted targets. Data on 3 targets may be displayed on the text area at a time.

In head-up and head-up true bearing modes, target bearing, course and speed shown in the upper-right target data field become true (suffix "T") or relative (suffix "R") to own ship in accordance with the true/relative vector setting. In north-up, course-up and true motion modes, the target data field always displays true bearing, true course and speed over the ground.

Place the cursor on a desired target and press the [TARGET DATA] key. Target data display is as below.

RNG/BRG (Range/Bearing): Range and bearing from own ship to the selected target with suffix "T" (True) or "R" (Relative).

CSE/SPD (Course/Speed): Course and speed are displayed for the selected target with suffix "T" (True) or "R" (relative).

CPA/TCPA: CPA(Closest Point of Approach) is the closest range a target will approach to own ship. TCPA is the time to CPA. Both CPA and TCPA are automatically calculated. When the CPA has passed clear of own ship, it is indicated by a TCPA with a negative (-) sign. TCPA is counted to 99.9 min and beyond this, it is indicate as TCPA> -99.9MIN.

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15-

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Guard Zone

Acquisition Zone

Target on collision course

Target in GZ

RNG 3.4 NM BRG 25.5°R CSE 264.0°R SPD 12.3 KT CPA 2.9 NM TCPA 12.2MIN BCR 1.7NM BCT 20MIN

Target accessed for data readout

Target being access ed for data readout is marked □1, 2 ,...etc.

RNG: Range from own ship to t ar get BRG: Bear ing from own ship to target

in R (Relative) or T ( True)

CSE: Course of target, True or

Relative SPD: Speed of target CPA: Closest Point of A ppr oac h of

target to own ship TCPA: Time to CPA BCR: Bow crossi ng r ange of target BCT: Bow cr os sing time of target

2.10 Vector modes

Target vectors can be displayed relative to own ship's heading (Relative) or north (True). Ground stabilization and Sea Stabilization Target vectors can be ground stabilized or sea stabilized. Sea stabilization is a mode where

own ship and all targets are referenced to the sea using gyro heading and single axis log water speed inputs in True Motion mode. Ground stabilization is a mode where own ship and all targets are referenced to the ground using the ground track or set and drift inputs. If the accuracy seems unsatisfactory, enter the set and drift correction (section 2.12).

True vector

Vector mode, True or Relative, is selected with the VECTOR key. With true vectors the radar display will look like the one shown below.

In the true motion mode, all fixed targets such as land, navigational marks and ships at anchor remain stationary on the radar screen with vector length zero. But in the presence of wind and/or current, vectors appear on fixed targets representing the reciprocal of set and drift affecting own ship unless set and drift values are properly entered.

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Buoy

Own ship

Target on collision course

Buoy

Own ship

Target on collision course

(a) True vectors in head-up mode (b) Relative vectors in head-up mode

Relative vector

With relative vectors the radar display will look like (b).

Relative vectors on targets which are not moving over the ground such as land, navigational marks and ships at anchor will represent the reciprocal of own ship’s ground track. A target of which vector extension passes through own ship is on the collision course. (Dotted lines in the figure are for explanation only.)

Vector time

Vector time (or the length of vectors) can be set to 30 seconds, 1, 2, 3, 6, 12, 15 or 30 minutes and the selected vector time is indicated at the upper-right corner of the screen.

1. Press the PLOT MENU key to display the ARPA 1 menu.

2. Press the [1] key to select the VECTOR TIME option.

3. Further press the [1] key to select (or highlight) a desired vector time.

4. Press the ENTER key to conclude your selection.

5. Press the PLOT MENU key to close the menu.

The vector tip shows an estimated position of the target after the selected vector time elapses. It can be valuable to extend the vector length to evaluate the risk of collision with any target.

R/N/W version: ARPA vector time can be programmed onto the function key. (e.g. pressing the function key can change the vector time.)

2.11 Past Position Display

The ARPA displays equally time-spaced dots marking the past positions of any targets being tracked.

A new dot is added every minute (or at preset time intervals) until the preset number is reached. If a target changes its speed, the spacing will be uneven. If it changes the course, its plotted course will not be a straight line.

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Displaying and erasing past positions

To display past positions;

1. Press the [PLOT MENU] and [0] key to display the ARPA 2 menu.

[ARPA 2] 1 [ARPA 1] 2 TRIAL MODE STATIC/DYNAMIC 3 HISTORY OFF/1/2 4 HISTORY POINTS 5/10/20 5 HISTORY INTVL 30S/1/2/3/6MIN 6 MARK SIZE STD/LARGE 7 GUARD, ACQUISITION STABILIZE NORTH/CRT 8 INPUT SIG CHECK 9 ARPA TRACK TEST 0 ARPA INITIAL SETTING

2. Press [3] key twice to select HISTORY ON.

3. Press the ENTER key followed by the PLOT MENU key. The label HISTORY appears at the upper-right corner of the screen. To erase past positions; press the [3] key twice on the ARPA 2 menu.

Selecting the number of dot s and past posi t ion plot interval s

1. Press the PLOT MENU and [0] key to show the ARPA 2 menu.

2. Press the [4] key to select menu item HISTORY POINTS.

3. Further press the [4] key to select a desired number of past positions (5, 10 or 20). The

IMO-type has the selection of only 5 or 10.

4. Press the ENTER key to confirm your selection.

5. Press the [5] key to select menu item HISTORY INTERVAL.

6. Further press the [5] key to select a desired past position plot interval (0.5, 1, 2, 3 or 6

minutes).

7. Press the ENTER key to conclude your selection.

8. Press the PLOT MENU key to close the menu.

2.12 Set and Drift (Set an d Rate)

Set, the direction in which a water current flows, can be manually entered in 0.1-degree steps. Drift, in another word Rate, the speed of tide, can also be entered manually in 0.1 knot steps.

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Set and drift corrections are beneficial for increasing the accuracy of vectors and target data. The correction is best made in the head-up mode with true vectors, watching landmasses, or other stationary targets. Thus, the speed and course of own ship over the ground are reciprocally calculated and compared with the relative bearing and range to the reference target to produce a Set and Drift. These values are automatically applied to all targets. If stationary targets have vectors, set and drift values should be adjusted until they lose vectors.

Proceed as follows to enter set and drift (rate):

1. Press the RADAR MENU key to show the FUNCTIONS 1 menu.

2. Press the [0] key to show the FUNCTIONS 2 menu.

3. Press the [7] key to select menu item SET, DRIFT.

4. Further press the [7] key to select OFF or MAN option.

OFF: No correction against set and drift. MAN: Manual entry of set and drift data.

5. If OFF is selected, press the ENTER key.

6. If you have selected MAN in step 4 above, the highlight cursor will advance to right

requesting you to enter SET xxx.x°. Enter the value of set in degrees by hitting numeric keys without omitting leading zeroes, if any, and press the ENTER key.

The highlight cursor will then advance to the next line DRIFT xx.xKT. Enter the value of

drift in knots by hitting numeric keys without omitting leading zeroes, if any, and press the ENTER key. Set and drift have the same effect on own ship and all targets.

7. Press the RADAR MENU key to close the menu. The label LOG (or NAV) on the top of

the display changes to SMG xx.x KTBT, where SMG stands for Speed Made Good and BT, Bottom Track. Set and drift data can also be used in the basic radar without ARPA function.

2.13 Setting CPA/TCP A Al arm Ranges

The ARPA continuously monitors the predicted range at the Closest Point of Approach (CPA) and predicted time to CPA (TCPA) of each tracked target to own ship.

When the predicted CPA of any target becomes smaller than a preset CPA alarm range and its predicted TCPA less than a preset TCPA alarm limit, the ARPA releases an aural alarm and displays the warning label COLLISION on the screen. In addition, the ARPA symbol changes to a triangle and flashes together with its vector.

CPA/TCPA alarm ranges must be set up properly taking into consideration the size, tonnage, speed, turning performance and other characteristics of own ship.

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CAUTION

CPA/TCPA Alarm

The CPA and TCPA alarm feature should never be relied upon as the sole means for detecting the risk of collision.

The navigator is not relieved of the responsibility to keep visual lookout for avoiding collisions, whether or not the radar or other plotting aid is in use.

To set the CPA/TCPA alarm ranges:

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [8] key to select menu item COLLISION ALARM. At this point, a highlight

cursor appears at the "CPA x.x NM" field.

3. Enter the CPA alarm range in nautical miles (0.0 to 9.9 nm) without omitting leading

zeroes, if any, and press the ENTER key. The highlight cursor now moves to the "TCPA xx.x MIN" field.

4. Enter the TCPA alarm limit in minutes (1.0 to 99.9 min) without omitting leading zeroes, if

any, and press the ENTER key.

5. Press the PLOT MENU key to close the menu.

Acknowledging CPA/ TCPA audi ble alarm

Press the AUDIO OFF key to acknowledge and silence the CPA/TCPA aural alarm. The warning label COLLISION and the flashing of the triangle plot symbol and vector remain

on the screen until the dangerous situation is gone or you intentionally terminate tracking of the target by using the CANCEL key.

2.14 Setting a Guard Zone

When a target transits the operator-set guard zone, the buzzer sounds and the indication GUARD turns red at the screen bottom. The target causing the warning is clearly indicated with an inverted flashing triangle.

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CAUTION

Guard zone (GZ)

The Guard Zone Alarm feature should never be relied upon as a sole means for detecting the risk of collision.

The navigator is not relieved of the responsibility to keep visual lookout for avoidin g collisions, wh ether or not the radar or other plotting aid is in use.

Activating the guar d zone

One or two guard zones may be selected. The NO. 1 guard zone is available between 3 and 6 nm and NO. 2 guard zone can be set anywhere when the NO. 1 zone is already in use.

To set and activate the guard zone:

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [4] key to select menu item GUARD ZONE.

3. Further press the [4] key to select (or highlight) ON to activate the guard zone.

4. Press the ENTER key to conclude your selection.

5. Press the [5] key to select menu item GUARD ZONE SET. At this point the GUARD

ZONE SET menu is displayed at the screen bottom.

[GUARD ZONE SET] 1 [ARPA 1] 2 1/2

SET LEFT /RIGHT BOUNDA RY CANCEL PREVIOUS AREA: CANCEL KEY

6. Press the [2] key and ENTER key. ([2] [2] [ENTER] when setting the No. 2 zone.)

7. Referring to figure below, place the cursor at the outer left corner of the area (point A) and

press the ENTER key.

8. Place the cursor at the right edge of the area (point B) and press the ENTER key.

Note: If you wish to create a guard zone having a 360-degree coverage around own ship, set point B in almost the same direction (approx. ±3°) as point A and press the ENTER key.

If the range scale is changed to less than half of GZ, the label GZ OUT appears in red at the upper right corner of the screen.

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9. Press the [1] key followed by the PLOT MENU key to close the ARPA 1 menu.

The guard zone like an example below appears on the display. Note that the guard zone has a fixed radial extension (width) of 0.5 nm. The label GZ is displayed in the box at the upper-right on the screen when guard zone is enabled.

Target in a guard zone is marked by inverted flashing triangle whichever is heading.

0.5nm

NO. 1 Guard Zone (GZ) is available bet wee n 3 and 6 nm wit h a fi xe d range depth of 0.5 nm. NO. 2 GZ ma y be set a nywhere when t he NO. 1 GZ is valid.

Two more alarm zones (NO. 1 and NO. 2 Ta rget Ala rm Z one s = TAZ) may be added in addit ion. T hi s mea ns a m axi m um 4 a l a rm z one s are available at a time. ARPA symbols are not changed to inverted triangles in the TAZ, onl y those i n GZ do so.

Deactivating the guard zone

1. Press the PLOT MENU key to show the ARPA 1 menu.

2. Press the [4] key to select menu item GUARD ZONE.

3. Further press the [4] key to select (or highlight) OFF to deactivate the guard zone.

4. Press the ENTER key to conclude your selection followed by the PLOT MENU key to

close the menu.

To acknowledge the guard zone alar m

Press the AUDIO OFF key to acknowledge and silence the guard zone aural alarm.

2.15 Operational Warnings

There are six main situations which cause the ARPA to trigger visual and aural alarms:

• CPA/TCPA alarm

• Guard zone alarm

• Lost target alarm

• Target full alarm for manual acquisition

• Target full alarm for automatic acquisition

• System failures

CPA/TCPA alarm

Visual and aural alarms are generated when the predicted CPA and TCPA of any target become less than their preset limits. Press the AUDIO OFF key to acknowledge and silence the CPA/TCPA aural alarm.

Furuno FR-2125, FR-2125-B, FR-2125W, FR-2125W-B, FR-2155 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual