Furuno FR-1710 User Manual

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MARINE RADAR

MODEL

FR-1710/1725/1760DS

(

9-52, Ashihara-cho, Nishinomiya, Japan

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

ll rights reserved.

Printed in Japan

Your Local Agent/Dealer

FIRST EDITION : NOV. 1998 L : APR. 9, 2001

PUB. No. OME-34530

YOSH)

FR-1700 SERIES

SAFETY INSTRUCTIONS

DANGER

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

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

WARNING

Radio Frequency Radiation Hazard

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

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.

Distances at which RF radiation levels of 100 and 10 W/m table below.

Note: If the scanner unit is installed at a close distance in front of the wheelhouse, your administration may require halt of transmission within a certain sector of scanner revolution. This is possible Ask your FURUNO representative or dealer to provide this feature.

Model

FR-1760DS

FR-1710

FR-1725

exist are given in the

Radiator

type

SN4A — 1.2 m SN5A — 1.0 m

XN12AF — 0.15 m XN20AF — —

XN20AF — 1.1 m

SN24AF — 1.0 m

Distance to

100W/m

point

Distance to

10W/m

point

WARNING

DANGER

Danger/Warning Labels in Display Unit

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.

This radar system contains the danger/ warning labels shown below. Do not remove the labels. If a label is peeling off or is illegible, contact a FURUNO agent for replacement.

WARNING

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

Name : Warning Label Type : 86-003-1011 Code No. : 100-236-230

DANGER

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

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.

Use the proper fuse.

Fuse rating is shown on the equipment. Use of a wrong fuse can result in equipment damage.

Keep heater away from equipment.

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

DANGER

Electrical shock hazard. Turn off power before servicing.

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

DANGER

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

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

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

INTRODUCTION.................................................................................v

SYSTEM CONFIGURATION.............................................................vi|

MENU TREE ....................................................................................viii

OPERATIONAL OVERVIEW

1.1 Turning on the Power ................................................................................................... 1-1

1.2 Transmitter ON............................................................................................................. 1-1

1.3 Control Description....................................................................................................... 1-2

1.4 CRT Brilliance .............................................................................................................. 1-3

1.5 Control Panel Backlighting........................................................................................... 1-3

1.6 Tuning the Receiver ..................................................................................................... 1-3

1.7 Degaussing the Screen................................................................................................ 1-4

1.8 Initializing the Compass Readout ................................................................................ 1-4

1.9 On-screen Legends and Markers ................................................................................ 1-5

1.10 Presentation Modes ................................................................................................... 1-6

1.11 Selecting the Range Scale ......................................................................................... 1-8

1.12 Entering Own Ship’s Speed ....................................................................................... 1-9

1.13 Pulselength, Echo Stretch........................................................................................ 1-10

1.14 Adjusting the Sensitivity ........................................................................................... 1-12

1.15 Suppressing Sea Clutter .......................................................................................... 1-12

1.16 Suppressing Precipitation Clutter............................................................................. 1-13

1.17 Interference Rejector ............................................................................................... 1-13

1.18 Measuring the Range............................................................................................... 1-14

1.19 Measuring Bearing................................................................................................... 1-14

1.20 Collision Assessment by the Offset EBL .................................................................. 1-15

1.21 Measuring Range and Bearing Between Two Targets ............................................. 1-15

1.22 Setting a Target Alarm Zone..................................................................................... 1-16

1.23 Off-centering (shift) .................................................................................................. 1-17

1.24 Echo Averaging........................................................................................................ 1-18

1.25 Electronic Plotting Aid (EPA) .................................................................................... 1-19

1.26 Target Trails (Echo T rails) ........................................................................................ 1-22

1.27 Parallel Index Lines.................................................................................................. 1-25

1.28 Origin Mark............................................................................................................... 1-25

1.29 Zoom ........................................................................................................................ 1-26

1.30 Markers .................................................................................................................... 1-26

1.31 User Keys (F1, F2, F3) ............................................................................................ 1-27

1.32 Function Keys .......................................................................................................... 1-27

1.33 Suppressing Second-trace Echoes.......................................................................... 1-29

1.34 Adjusting Brilliance of Screen Data.......................................................................... 1-29

1.35 Noise Rejector.......................................................................................................... 1-30

1.36 Time Alarm ............................................................................................................... 1-30

1.37 Enhanced Video....................................................................................................... 1-30

1.38 Degaussing Interval ................................................................................................. 1-31

1.39 Navigation Data........................................................................................................ 1-31

1.40 Video Contrast ......................................................................................................... 1-32

iii

1.41 Clutter Sweep........................................................................................................... 1-32

1.42 Outputting Target Position........................................................................................ 1-32

1.43 Background Color .................................................................................................... 1-33

1.44 Selecting Range Scales........................................................................................... 1-33

1.45 Selecting Bearing Scale Format .............................................................................. 1-33

1.46 A/D Converter Curve Setting.................................................................................... 1-34

1.47 Enlarging Close-in Targets....................................................................................... 1-34

1.48 Alarms ...................................................................................................................... 1-35

1.49 Peformance Monitor................................................................................................. 1-36

RADAR OBSERVATION

2.1 General ........................................................................................................................ 2-1

2.2 False Echoes ............................................................................................................... 2-2

2.3 SART (Search and Rescue Transponder) ................................................................... 2-3

2.4 RACON (Radar Beacon).............................................................................................. 2-5

MAINTENANCE, TROUBLESHOOTING

3.1 Periodic Maintenance Schedule .................................................................................. 3-1

3.2 Life Expectancy of Major Parts .................................................................................... 3-2

3.3 Fuse Replacement....................................................................................................... 3-3

3.4 Replacement of Batteries............................................................................................. 3-3

3.5 Simple Troubleshooting ............................................................................................... 3-3

3.6 Advanced-level Troubleshooting .................................................................................. 3-4

3.7 Diagnostic Test............................................................................................................. 3-7

PARTS LOCATION ..........................................................................4-1

SPECIFICATIONS.........................................................................SP-1

INDEX

Declaration of Conformity (FR-1760DS)

INTRODUCTION

A Word to the Owner of This 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 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

■ FR-1760DS is 60kW, S-band radar , FR-1710 is 10kW, X-band radar and FR-1725 is 25kW , X-band radar.

■ Daylight-bright rasterscan 17-inch multi-color, high-resolution display

■ New microprocessing technology with high-speed high-density gate array and software

expertise

■ Easy operation by combination of discrete keys, rotary controls, and menu operation, all logically arranged and configured

■ Electronic Plotting Aid (EPA) fitted standard, Automatic Tracking Aid (ATA) option

■ Reliable CPA and TCPA warning in any plotting mode, accurate target data

■ The Clutter Sweep feature suppresses sea and rain clutters within an operator-selected

area.

■ A Video Plotter (Chart Plotter) and Performance Monitor are also optionally available.

FR-1760DS

SYSTEM CONFIGURATION

ANTENNA UNIT

110/115/ 220 VAC, 1φ, 50/60 Hz

100 VAC, 1φ, 50/60 Hz

100/110/ 115 VAC, 1φ, 50/60 Hz

220 VAC, 1φ, 50/60 Hz

440 VAC, 1φ, 50/60 Hz

Rectifier

RU-3305

Rectifier

RU-1758

Rectifier

RU-1803

Serial Data

(I/O)

GPS, etc.

Speed Log

Pulse Input

Water temperature, water depth

Gyrocompass

External

Buzzer

OP03-21

For de-icer

POWER

SUPPLY

UNIT

PSU-002

DISPLAY UNIT

RDP-120

ATA Board

ARP-17

Gyro Converter

GC-8A

Video Plotter RP-17 Board

SN4A-RSB-0051-N SN4A-RSB-0051-I SN5A-RSB-0051-N SN5A-RSB-0051-I

Remote Display

FMD-8010/FMD-811

Option

Ship’s Mains 24/32 VDC

Rectifier

RU-3424

100/110/115/220/230 VAC, 1φ, 50/60 Hz

FR-1710/1725

Serial Data

GPS, etc.

Speed Log

Water temperature, water depth

Gyrocompass

OP03-21

(I/O)

Pulse Input

External

Buzzer

ANTENNA UNIT

DISPLAY UNIT

RDP-120

ATA Board

ARP-17

Gyro Converter

GC-8A

Video Plotter RP-17 Board

FR-1710 XN12AF-RSB0074-062 (24 rpm)

XN20AF-RSB0074-062 (24 rpm) XN12AF-RSB0075-062 (42 rpm) XN20AF-RSB0075-062 (42 rpm)

FR-1725 XN20AF-RSB0074-063 (24 rpm)

XN24AF-RSB0074-063 (24 rpm) XN20AF-RSB0075-063 (42 rpm) XN24AF-RSB0075-063 (42 rpm)

Remote Display

FMD-8010/FMD-811

Option

Rectifier

RU-3424

Ship’s Mains 24/32 VDC or 100/110/115/220/230 VAC, 1φ, 50/60 Hz

*: FR-1725 only

Note: The display unit is available

in AC or DC specification.

vii

MENU key

TGT TRAIL

1. VIDEO PLOT*

2. TGT TRAIL

3. TGT ALARM

4. PANEL DIM

5. ECHO SIG

6. FUNC

7. PLOT 1

8. MARK 2

9. BRILL 3

0. OTHER 4 * Requires Video Plotter

RP-17.

MENU TREE

1. TIME 15S 30S 1M 3M 6M 15M 30M CONT

2. MODE REL TRUE

3. SHADE MONO MULTI

4. LEVEL 1 2 3

5. TRAIL COPY OFF ON

6. THIN TRAIL OFF ON

7. THIN MODE 1 2 3 4

TGT ALARM

1. AREA NO1 NO2

2. MODE1 IN OUT

3. MODE2 IN OUT

DIMMER

1. PANEL BRIGHT 7 6 5 4 3 2 DIM

: Default settings

ECHO SIG

1. TGT COLOR YEL GRN COLOR*

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

FUNC

1. FUNC1 5

2. FUNC2

3. F•1 6

4. F•2

5. F•3

6. A/D CURVE A B C D

* COLOR not shown on HK type radar.

OFF ON(LINK) ON(FIX)

viii

PLOT MENU 1

1. MARK DISP OFF ON

2. ERASE

3. VEC REF REL TRUE

4. VEC TIME 30S 1M 3M 6M 15M 30M

5. CPA SET OFF 0.5NM 1NM 1.5NM 2NM 3NM 4NM 5NM 6NM

6. TCPA SET 30S 1M 2M 3M 4M 5M 6M 12M 15M

7. TRACK OFF ON

8. AUDIO ALARM OFF ON

9. INTVAL* 30S 1M 2M 3M 6M

0. ↓*

[0]

* Requires Automatic Tracking Aid ARP-17 (Option).

PLOT MENU 2*

1. ↑

2. AUTO OFF ON SET

3. GUARD ZONE OFF ON SET

4. TRACK TEST

5. LAND DISCRIM 0 1 2 3 4 5

6. TTM OFF REL TRUE

7. VEC START 1MIN 20SCAN

8. REF TGT VECTOR OFF ON

9. TARGET BASED SPEED

MARK

1. ERASE

2. MODE REL TRUE

BRILL

1. TGT TRAIL

2. CHARACTER

3. HDG LINE

4. EBL/VRM

5. CURSOR

6. MARK

7. PLOT

8. OS SYMB

9. ↓

PLOTTER BRILL*

1. ↑

2. LAND

3. GRID

4. MARK

5. OS TRACK

6. TGT TRACK

7. COLOR

* Requires Video Plotter RP-17 (option).

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV

LOG (S-BT)

LOG (S-WT)

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓ 7

EBL/VRM

1. ↑

2. CURS BRG REL TRUE

3. EBL1 REL TRUE

4. EBL2 REL TRUE

5. CURS RNG NM KM SM

6. VRM1 NM KM SM

7. VRM2 NM KM SM

DISPLAY

DRIFT SET

1. ↑

2. SET&DRIFT OFF ON

3. SET

4. DRIFT

1. ↑

2. NAV DATA OFF ON

3. DISPLAY MAIN SUB

4. SART OFF ON

5. P M OFF ON

MARK/LINE

1. ↑

2. INDEX LINES 2 6

3. STERN MARK OFF ON

4. SHIP’S MARK OFF ON

BEARING SCALE

1. ↑

2. MODE AUTO MAN

3. TUNE SET

360 COMPASS

TUNE

NAV DATA

1. ↑

2. NAV SEL ANY GPS LC

3. EXT WP OFF ON

4. OS POSN OFF L/L TD

5. DEPTH M FA

6. TEMP °C °F

7. TIME DIF UTC LOCAL

8. LOCAL TIME

FUNC 1 MENU

1. ↑

2. FUNC SEL COAST OCEAN R-SEA RAIN BIRD-N BIRD-F

3. ECHO AVG OFF 0.5 1 2 3

4. INT REJ OFF 1 2 3

5. STRETCH OFF 1 2

6. N REJ OFF ON

7. ENHANCE OFF ON

8. CONTRAST OFF 1 2 3

9. A/C AUTO OFF ON

[F•2 MENU]

1. TRAIL TIME 26. HUTB MODE

2. TRAIL MODE 27. TUNE A/M

3. TRAIL SHADE 28. EXT WP

4. TRAIL LEVEL 29. OS POSN

5. ALARM AREA 30. CURS BRG

6. ALARM MODE 31. EBL1 T/R

7. PANEL DIMMER 32. EBL2 T/R

8. TGT COLOR 33. CURS RNG

9. ECHO AVG 34. VRM1 RNG

10. INT REJ 35. VRM2 RNG

11. ECHO STRETCH 36. CLTR SWEEP

12. NOISE REJ 37. MARK MENU

13. ECHO ENHANCE 38. DISP MODE

14. 2ND ECHO 39. A/D CURVE

15. CONTRAST 40. DRIGIN MARK

16. PLOT MENU 41. DEST ON CSR

17. MARK MODE

18. BRILL MENU

19. DRIFT MENU

20. NAV DATA

21. DISPLAY

22. SART

23. TIME ALARM

24. STERN MARK

25. OS MARK Select by VRM knob

and hit ENTER key.

37 and 38 shown with connection of RP-17.

OTHER

1. ↑

2. TEST

3. DEGAUSS

4. TIME ALARM

5. RANGE

6. INSTALL*

*: See Installation Manual.

DEGAUSS

1. ↑

2. DEGS INTV OFF 30S 1M 2M

3. DEGS DEG OFF 45° 90° 135°

TIME ALARM

1. ↑

2. ALARM INTV OFF 3M 6M 12M 15M 20M

RANGE

1. ↑

2. RANGE 1/8 1/4 1/2

3/4 1 1.5 2 3 4 6 8 12 16 24 32 48 72 96 120

FR-1760DS Max. range: 120 NM FR-1710 Max. range: 72 NM FR-1725 Max. range: 96 NM

xii

OPERATIONAL OVERVIEW

1.1 Turning on the Power

The [POWER] switch is located at the top left corner of the display unit. Push it to switch on the radar set. To turn off the radar , push it again. The screen shows the bearing scale and digital timer approximately 15 seconds after power-on. The timer counts down three minutes of warm-up time. During this period the magnetron, that is, the 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.

POWER switch

1.2 T ransmitter ON

After the power has been turned on and the magnetron has warmed, STBY (Standby) appears at the screen center, indicating the radar is ready to transmit radar pulses.

Press the [STBY/TX] key to transmit. When you won’t be using the radar for an

extended period, but you want to keep it in a state of readiness, place it in standby by pressing the [STBY/TX] key. The display shows STBY when the radar is in standby.

Video Lockup Recovery

Video freeze-up or lock-up, can occur unexpectedly on digital rasterscan radars. This is mainly caused by heavy spike noise in the power line and can be noticed by carefully watching the nearly invisible 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 normal picture, do Quick Start to restore normal operation.

Figure 1-1 Location of power switch

DANGER

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

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

1. Turn off the POWER switch and turn it on again within 10 seconds.

2. Push the Transmit switch labeled STBY/TX for Transmit status.

1-1

1.3 Control Description

Selects presentation mode.

MODE

Offset EBL origin to measure range,

Turns power on/off.

Chart card slot (Requires video plotter.)

ROTATE: Rotates EBL. PUSH: Degausses screen.

Alternately selects No.1 EBL, No.2 EBL.

Erases EBL.

Turns on/off target trails.

Enables/disables guard zone.

Off centers picture.

Turns zoom function on/off.

Turns parallel index lines on/off.

bearing between two targets;

predict collision course.

TRACKBALL Shifts cursor.

ROT A TE: Adjusts screen brilliance. PUSH: Selects background color.

DEGAUSS (PUSH)

EBL

OFF

BKGND COLOR (PUSH)

BRILL

F2 F3

ROTATE: Suppresses sea clutter. PUSH: Turns on/off automatic clutter suppression.

TLL (PUSH)

A/C RAIN

A/C AUTO (PUSH)

Activates desired function.

ROTATE: Suppresses precipitation clutter. PUSH: Outputs target position.

HL OFF (PUSH)

A/C SEA

GAIN

RANGE

Selects range scale.

Turns on/off menu-selected function.

TGT

TRAIL

ALARM

SHIFT

ZOOM

INDEX

LINE

EBL

OFFSET

MARK

RINGS

Inscribes mark.

Adjusts brilliance of fixed range rings.

CANCEL

CLEAR

ENTER

SELECT

Displays previous menu.

Opens/closes menu.

Menu open: Cancels item selected. Menu closed: Erases mark.

Menu open: Registers selection. Menu closed: Displays data of selected plot symbol.

ROT A TE: Adjusts gain. PUSH: Temporarily erases heading line, markers (stern, north) OS symbol.

Selects pulselength, echo stretch.

Adjusts radius of VRM.

10-1

-2 3

-3

ECHO

STBY

VRM

OFF

ACQ

Manually acquires target (plotting

AUDIO

OFF

function).

Silences timer, ATA and EPA alarms.

Alternately selects

Erases VRM.

No.1 VRM, No.2 VRM.

Transmit/standby switch

1-2

Figure 1-2 Control description

1.4 CRT Brilliance

1.6 Tuning the Receiver

Operate the BRILL control on the control panel of the display unit to adjust the entire screen brightness. Note that the optimum point of adjustment varies with ambient lighting conditions, especially between daytime and nighttime.

1.5 Control Panel Backlighting

1. Press the [MENU] key.

1. VIDEO PLOT

2. TGT TRAIL

3. TGT ALARM

4. PANEL DIM

5. ECHO SIG

6. FUNC

7. PLOT

8. MARK

9. BRILL

0. OTHER

Figure 1-3 Main menu

2. Press the [4] key twice. The following display appears.

DIMMER

1. PANEL BRIGHT 7 6 5 4 3 2 DIM

Figure 1-4 Screen for adjustment

of panel dimmer

3. Press the [1] key to select backlighting level desired.

4. Press the [ENTER/SELECT] key to register your selection and the [MENU] key to close the menu.

The radar is set for automatic tuning at the factory.

Automatic tuning

The radar receiver is tuned automatically each time the transmitter is turned on. The tuning indicator and the label AUTO at the top right corner of the display unit shows the tuning circuit is working. The receiver may become detuned, in automatic tuning, if own ship’s radar receives the radar signal of another shipborne radar. To retune, press the [STBY/TX] key twice.

Manual tuning

1. Set up for manual tuning following the procedure shown below.

2. While observing the picture on the 48 mile scale, press and hold down the GAIN control while slowly adjusting the VRM rotary control to find the best tuning point. This condition is where the tuning indicator lights to about 80% of its total length. Note that the tuning indication will never extend to full length.

Selection of manual or automatic tuning

1. Press the [MENU] key.

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

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV LOG (S-BT)

LOG (S-WT)

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓

Figure 1-5 OTHER menu

1-3

3. Press the [7] key twice to display the TUNE menu.

TUNE

1. ↑

2. MODE AUTO MAN

3. TUNE SET

Figure 1-6 TUNE menu

4. Press the [2] key to select the option AUTO or MAN from the MODE field.

5. Press the [ENTER/SELECT] key.

1.8 Initializing the Compass Readout

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

6. Press the [MENU] key to close the menu.

1.7 Degaussing the 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, which may be selected on the menu. While being degaussed, the screen may be disturbed momentarily with vertical lines. If you wish to degauss by manual operation, push the EBL rotary control (DEGAUSS control).

1. Press the [MENU] key to display the main menu.

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

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV LOG (S-BT)

LOG (S-WT)

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓

Figure 1-7 OTHER menu

1-4

3. Press the [1] key to select HDG SET.

4. Operate the VRM rotary control to duplicate the compass readout on the radar menu display.

5. Press the [ENTER/SELECT] key.

6. Press the [MENU] key to close the menu.

1.9 On-screen Legends and Markers

Heading (Requires heading sensor.)

Range ring interval

Range to cursor

Bearing to cursor

Presentation mode

Pulselength

Offcenter

Function

Target alarm zone No. 1

No. 1 EBL

No. 2 EBL

Range rings

Interference rejector

Echo stretch

Noise rejector

Auto clutter reduction

Echo averaging

Video contrast

No. 1 EBL bearing

Heading line

/2 NM

4.111NM

103.7°R HU PULSE MIP OFF CENT FUNC1 COAST

320

310

300

290

2 8 0

2 7 0

2 6 0

2 5 0

240

230

220

IR2 ES1 NR A/C AUTO EAV1 VIDEO CONTRAST1 EBL

345.6° R

23.0° R

No. 2 EBL bearing

2nd trace echo rejector

2nd Echo

340

330

320

210

200

(L/L)

135°

RNG

BRG

TTG 00:20

9/22

12:34

Date, time

Range, bearing to waypoint

Own ship position

HDG 234.5°

LOG 12.8 KT

350

190

40.36’N

34°

18.23’E

123.9NM 220°R

UTC

Log speed (Requires log device.)

AUTO

GAIN

A/C SEA

A/C RAIN

BRILL

000

010

020

030

040

140

150

160

170

180

40°21.211’N

127°21.321’E

TTG 00 : 50

TEMP 20.1°C DEPTH 123.5M

Water temperature, water depth

T-ALM

02:30

REL TRAIL

30S 0 : 16

2.093 NM

4.465 NM

Timer alarm countdown

Cursor position, time-to-go

050

060

120

130

GZ1

GZ2

OUT IN

VRM

0 7 0

110

0 7 0

0 8 0

0 9 0

1 0 0

Tuning bar

GAIN setting A/C SEA setting

A/C RAIN setting

BRILL setting

Cursor

Waypoint marker

Target alarm zone No. 2

No.1 VRM

No.2 VRM

North marker

Guard zone (active one is circumscribed) Guard zone mode

Target trail reference Target trail time, elapsed time

No. 1 VRM range No. 2 VRM range

Figure 1-8 On-screen legends and markers

Note: The cursor functions to measure the range and bearing to a radar target, and is permanently displayed. It can be returned to the screen center by pressing the VRM rotary control.

1-5

1.10 Presentation Modes

This radar has the following presentation modes: Head-up, Head-up/TB, Course-up, North-up, and True Motion.

Selecting presentation mode

Press the [MODE] key on the panel at the right side of the display unit. Each time the [MODE] key is pressed, the presentation mode and mode indication at the upper-left corner of the screen change cyclically.

Note: When a failure occurs in the gyrocompass, the radar will automatically be switched to unstabilized presentation mode. All compass related data will read Relative values.

Loss of Compass Signal

When the compass signal is lost, the buzzer sounds once, the presentation mode becomes head-up and the compass readout shows xxx.x°. After restoring the compass signal, press the [MODE] key to display the compass readout. Readjust the compass readout as shown on page 1-4. Also HDG SIGNAL MISSING appears at the bottom of the screen.

Presentation mode, representative display

Heading

marker North marker

300

290

280

270

260

250

240

North marker

310

300

290

280

270

320

310

230

220

340

330

320

260

250

210

330

240

350

200

340

000

230

350

190

010

220

The bearing scale rotates with a compass signal.

Heading line

000

010

170

180

Heading marker

030

020

200

210

020

160

190

040

030

150

050

180

040

050

130

140

Heading line

060

070

160

170

120

060

150

080

Description

Head-up Mode

A display without azimuth stabilization in which the line connecting the center with the top of the display indicates own ship’s heading.

070

080

090

100

110

The target pips are painted at their measured distances and in their directions relative to own ship’s heading.

A short line on the bearing scale is the north marker indicating compass north. A failure of the compass input will cause the north marker to disappear and the HDG readout to show asterisks xxx.x°.

Head-up TB (True Bearing) Mode

Radar echoes are shown in the same way as in the head-up mode. The difference from normal head-up presentation lies in the orientation of the bearing

090

100

110

120

130

140

scale. The bearing scale is compass stabilized, that is, it rotates in accordance with the compass signal, enabling you to know own ship’s heading at a glance.

This mode is available only when the radar is interfaced with a compass.

If the compass fails, the bearing scale returns to the state of head-up mode.

1-6

Presentation mode, representative display

Description

North marker

330

320

310

300

290

280

270

260

300

290

280

270

260

250

240

310

230

250

340

320

220

240

350

210

330

000

230

010

220

340

200

Heading marker

030

020

200

210

North

000

350

190

180

190

010

170

040

180

020

160

Heading line

050

060

070

160

170

Heading line

030

040

050

130

140

150

080

090

100

110

120

130

140

150

Heading marker

060

070

080

090

100

110

120

Course-up Mode

An azimuth stabilized display in which a line connecting the center with the top of the display indicates own ship’s intended course (namely, own ship’s previous heading just before this mode has been selected). Target pips are painted at their measured distances and in their directions relative to the intended course which is maintained at the top of screen while the heading line moves in accordance with ship’s yawing and course changes. This mode is useful to avoid smearing of picture during course change. After a course change, press the [SHIFT] key to reset the picture orientation if you wish to continue using the course-up mode. The heading line gets back to perpendicular.

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 being maintained up of the screen. The heading line changes its direction according to the ship’s heading.

If the compass fails, the presentation mode changes to head-up and the north marker disappears. Also, the HDG readout shows xxx.x°.

1-7

Presentation mode, representative display

Description

270

280

260

290

250

300

240

310

230

North marker

330

320

220

210

340

200

350

190

000

180

010

170

020

160

Heading line

030

040

140

150

050

060

120

130

Heading marker

070

080

090

100

110

True Motion Mode

Own ship and other moving objects move in accordance with their true courses and speeds. In ground stablized TM, all fixed targets, such as landmasses, appear as stationary echoes. In the sea stablized TM without set and drift input, the landmass can move on the screen.

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

If the compass fails, the presentation mode is changed to the head-up mode and the north marker disappears. The HDG readout at the top of the screen shows xxx.x°.

North

Heading line

300

290

280

270

260

250

240

350

340

330

320

310

230

220

210

200

(a) True motion is selected

000 010

marker

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

300

290

280

270

260

250

240

340

330

320

310

230

220

210

200

(b) Own ship has reached a point 75% of display radius

Automatic resetting of own ship position in true motion mode

1.11 Selecting the Range Scale

The range selected automatically determines

the range ring interval, the number of range rings and pulse repetition rate, for optimal detection capability in short to long ranges. You can select pulselength with the ECHO control. For details, see paragraph 1.13.

000 010

350

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

320

310

300

290

280

270

260

250

240

230

220

000 010

350

340

330

210

200

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

Press the [RANGE] key to select a range scale. The range, range ring interval and pulselength appear at the top left corner of the display.

1-8

1.12 Entering Own Ship’s Speed

4. Press the [ENTER/SELECT] key to confirm your selection followed by the [MENU] key to close the menu.

EPA requires an own ship speed input and compass signal. The speed can be entered from a speed log or navaid (automatic) or through the plotting keypad (manual).

Automatic speed input

1. Press the [MENU] key and the [0] key twice to show the OTHER menu.

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV LOG (S-BT)

LOG (S-WT)

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓

Figure 1-9 OTHER menu

2. Press the [2] key to select the menu item SPD MODE.

3. Press the [2] key again to select the LOG or NAV.

LOG: Pulse input from speed

log, serial data

NAV: Speed data from naviga-

tion equipment

Note: Be sure not to select a LOG option or NAV when respective equipment is not connected. If the log signal or navaid signal is not provided, the ship’s speed readout at the screen top will be blank.

Manual speed input

If the radar is not interfaced with a speed log, or the speed log does not feed correct speed enter the ship’s speed as follows:

1. Press the [MENU] key and the [0] key twice to show the OTHER menu.

2. Press the [2] key to select MAN from the SPD MODE field, and then press the [ENTER/SELECT] key.

3. Press the [3] key twice to select the MAN SPD field.

4. Enter speed with the numeric keys.

5. Press the [ENTER/SELECT] key to confirm your selection followed by the [MENU] key to close the menu.

LOG 10.0KT WT

Or NAV

LOG or NAV speed indication

LOG 8.7KT WT

8.5 F ← Fore/Aft

0.5 SB ← Port/STBD

About Ship’s Speed

c’

Wind,

⇒

current

LOG (serial data) speed indication

a: Fore/aft speed b: Port/starboard speed c: Speed made good (actual speed)

Pulse signal: a only (water tracking speed) Serial speed: a and b

Water tracking speed = relative speed (including error due to wind, current Ground tracking speed = true speed (no influence from wind, currents) Navigator speed: c→c’ Speed input (c) from navgator (GPS, etc.) c is converted to fore/aft direction (c’) and displayed on the radar screen.

1-9

1.13 Pulselength, Echo Stretch

The ECHO control selects pulselength, and echo stretch when it is not turned on with a user key ([F1], [F2], [F3]). The pulselength in use is displayed at the upper-left position of the screen using the abbreviations (suffixed with “P”) shown in the table on the next page. Echo stretch level (ES1, ES2) in use appears at the bottom left position, using the indication ES1 or ES2.

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 ECHO control. The ECHO control settings which can select the echo stretch are shown in the table below. The legend and pulselengths are shown in below.

5271/0171-RFSD0671-RF sµ70.0:P1Ssµ80.0:PS sµ51.0:P2Ssµ3.0:P1M

sµ3.0:P1Msµ6.0:P2M sµ5.0:P2Msµ2.1:PL sµ7.0:P3M

sµ2.1:PL

Note: 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.

Enlarged in bearing (circumferential) direction with ES1

If a distant target is hard to see, use ES 1.

Enlarged with ES2

If a target becomes smaller as it approaches own ship, use ES 2.

Figure 1-10 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 two types: echo stretch 1 (ES1) to enlarge in bearing direction for long range detection, and echo stretch 2 (ES2) to enlarge in range direction.

1-10

Table 1-1a ECHO control setting, pulselength and echo stretch (FR-1710/1725)

egnaR sgnitteShctertSohcEdnahtgnelesluPdnanoitisoPlortnoCOHCE

mkmsmn3-2-1-0123

52.0– 521.0P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1S

5.052.052.0P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1S

57.0–– P1SP1SP1SP1S1SE,P1SP2S1SE,P2S

15.05.0P1SP1SP1SP1S1SE,P1SP2S1SE,P2S

–57.0– P1SP1S1SE,P1SP2S1SE,P2SP1M1SE,P1M

5.1157.0P1SP1S1SE,P1SP2S1SE,P2SP1M1SE,P1M

25.11 P1SP1S1SE,P1SP2S1SE,P2SP1M1SE,P1M 32 5.11SE,P1SP2S1SE,P2SP1M1SE,P1MP2M1SE,P2M 432 1SE,P1SP2S1SE,P2SP1M1SE,P1MP2M1SE,P2M 6– 3 1SE,P2SP1M1SE,P1MP2M1SE,P2MP3M1SE,P3M 844 1SE,P2SP1M1SE,P1MP2M1SE,P2MP3M1SE,P3M

2166 1SE,P2SP1MP2MP3M2SE,P3MPL1SE,PL

6188 1SE,P2SP1MP2MP3M1SE,P3MPL1SE,PL 4221211SE,P1M1SE,P2MP3MPL1SE,PL2SE,PL2SE,PL 2361611SE,P2MP3M1SE,P3MPL1SE,PL2SE,PL2SE,PL 8442421SE,P2MP3M1SE,P3MPL1SE,PL2SE,PL2SE,PL

–2323PLPLPLPL1SE,PL2SE,PL2SE,PL

278484PLPLPLPL1SE,PL2SE,PL2SE,PL 69–– PLPLPLPL1SE,PL2SE,PL2SE,PL

–2727PLPLPLPL1SE,PL2SE,PL2SE,PL –6969PLPLPLPL1SE,PL2SE,PL2SE,PL

Table 1-1b ECHO control setting, pulselength and echo stretch (FR-1760DS)

egnaR sgnitteShctertSohcEdnahtgnelesluPdnanoitisoPlortnoCOHCE

mkmsmn3-2-1-0123

52.0– 521.0P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1S

5.052.052.0P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1S

57.0–– P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1M

15.05.0P1SP1SP1SP1S1SE,P1S1SE,P1S1SE,P1M

–57.0– P1SP1SP1SP1S1SE,P1SP1M1SE,P1M

5.1157.0P1SP1SP1SP1S1SE,P1SP1M1SE,P1M

25.11 P1SP1SP1SP1S1SE,P1SP1M1SE,P1M 32 5.1P1SP1S1SE,P1SP1M1SE,P1MP2M1SE,P2M 432 P1SP1S1SE,P1SP1M1SE,P1MP2M1SE,P2M 6– 3 P1SP1S1SE,P1MP1M1SE,P1MP2M1SE,P2M 844 P1MP1M1SE,P1MP2M1SE,P2MPL1SE,PL

2166 P1MP1M1SE,P1MP2M2SE,P2MPL1SE,PL

6188 P1MP1M1SE,P1MP2M1SE,P2MPL1SE,PL 422121P1MP1M1SE,P1MP2M1SE,P2MPL1SE,PL 236161P2MP2M1SE,P2MPL1SE,PL2SE,PL2SE,PL 844242P2MP2M1SE,P2MPL1SE,PL2SE,PL2SE,PL

–2323PLPLPLPL1SE,PL2SE,PL2SE,PL

278484PLPLPLPL1SE,PL2SE,PL2SE,PL 69–– PLPLPLPL1SE,PL2SE,PL2SE,PL

–2727PLPLPLPL1SE,PL2SE,PL2SE,PL –6969PLPLPLPL1SE,PL2SE,PL2SE,PL

021021021PLPLPLPL1SE,PL2SE,PL2SE,PL

1-11

1.14 Adjusting the Sensitivity

The GAIN control adjusts the sensitivity of the receiver. It works in precisely the same manner as the volume control of a broadcast receiver, amplifying the signals received.

If the control is set too low, targets will be hidden in the clutter , while if it is set too high, both sea clutter and targets will disappear from the display. In most cases adjust the control until clutter has disappeared to leeward, but a little is still visible windward.

The proper setting is such that the background noise is just visible on the screen. If you set up for too little sensitivity, weak echoes may be missed. On the other hand excessive sensitivity yields too much background noise; strong targets may be missed because of the poor contrast between desired echoes and the background noise on the display.

T o adjust receiver sensitivity , transmit on long range, and adjust the GAIN ground noise is just visible on the screen. The current gain setting is shown by the “GAIN bar” at the top right-hand corner of the screen.

control so back-

1.15 Suppressing Sea Clutter

Echoes from waves cover the central part of the display with random signals known as sea clutter . The higher the waves, and the higher the scanner above the water , the further the clutter will extend. When sea clutter masks the picture, suppress it by the A/C SEA control, rotate for manual adjustment, push for automatic adjustment.

Manual adjustment by the A/C SEA control

1. Confirm that the sensitivity is properly adjusted, and then transmit on short range.

2. Adjust the A/C SEA control so small targets are distinguishable but some clutter remains on the display.

A/C SEA control off

A/C SEA control adjusted

Figure 1-11 How to adjust

the A/C SEA control

Automatic adjustment by the A/C AUTO control

The A/C AUTO control automatically suppresses sea clutter as well as rain clutter. Push the A/C SEA control to turn on the automatic A/C circuit. A/C AUTO appears at the bottom left corner when the A/C AUTO circuit is on. Fine adjustment of the circuit can be done with the A/C RAIN and A/C SEA controls.

The A/C SEA control reduces the amplification of echoes at short ranges (where clutter is the greatest) and progressively increases amplification as the range increases, so amplification will be normal at those ranges where there is no sea clutter.

The proper setting of the A/C SEA control should be such that the clutter is broken up into small dots, and small targets become distinguishable.

1-12

CAUTION

Turn off the A/C AUTO feature when its use is not required; it can erase weak target echoes.

1.16 Suppressing Precipitation Clutter

The vertical beamwidth of the scanner is designed to see surface targets even when the ship is rolling. However, by this design the unit will also detect rain clutter (rain, snow, or hail) in the same manner as normal targets. Figure 1-12 shows the appearance of rain clutter on the display.

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 anti-clutter effect.

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 lowerleft position of the screen.

Figure 1-13 Interference

To activate the interference rejector;

1. Press the [MENU] key.

2. Press the [5] key twice to select ECHO SIG.

A/C RAIN control OFF

A/C RAIN control adjusted

Figure 1-12 Effect of A/C RAIN control

1.17 Interference Rejector

Mutual radar interference may occur in the vicinity of another shipborne radar operating in the same frequency band (9 GHz). 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.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

Figure 1-14 ECHO SIG menu

3. Press the [3] key to select interference rejection level (OFF, 1, 2, or 3) from the INT REJ field.

4. Press the [ENTER/SELECT] key.

5. Press the [MENU] key.

The interference rejector is a kind of signal correlation circuit. It compares the received signals over successive transmissions and suppresses randomly occurring signals.

1-13

1.18 Measuring the Range

Measuring range by the fixed range rings

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. The fixed range rings may be turned on/off and their brilliance adjusted with the [RINGS] key.

Measuring range by the variable range marker (VRM)

0.55 NM

15.0°R

Range and bearing to cursor

Ring interval

Active marker is circumscribed.

Target

Cursor

No. 1 VRM (dotted)

No. 2 VRM (dashed)

VRM

0.375NM

0.550NM

Range to No. 2 VRM

Figure 1-15 How to measure

range by VRM

Range to No. 1 VRM

Use the V ariable 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.

1. 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.

2. Rotate the VRM rotary control clockwise or counterclockwise to align the active VRM with the inner edge of the target of interest and read its distance (unit: nm) at the lower-right corner of the screen. Each VRM remains at the same geographical distance when you operate the [RANGE] key . This means that the apparent radius of the VRM ring changes in proportion to the selected range scale.

3. Press the [VRM OFF] key to erase each VRM.

1.19 Measuring Bearing

Use the Electronic Bearing Lines (EBLs) to find bearing 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.

1. 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, No.2 and index lines (if displayed) and the currently active EBL readout is circumscribed.

2. 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.

3. Press the [EBL OFF] key to erase each EBL.

The EBL readout is affixed by “R” (relative) if it is relative to own ship’s heading, or “T” (true) if it is referenced to the North, as determined by the item EBL/VRM on the OTHER menu.

1-14

Bearing to No. 1 EBL Bearing to No. 2 EBL

Range and bearing to cursor

0.55 NM

15.0°R

No. 2 EBL (dashed)

EBL

45.5°R

314.0°R

Active marker is circumscribed.

Cursor

No. 1 EBL (dotted)

Figure 1-16 How to measure

bearing by EBL

Target

If relative motion is selected, it is also possible to read CPA (Closest Point of Approach) by using a VRM as shown in Figure 1-17(a). If the EBL passes through the sweep origin (own ship) as illustrated Figure 1-17(b), the target ship is on a collision course.

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

Cursor

No.1 No.1 EBL

VRM

1.20 Collision Assessment by the 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 EBL No.1.

2. Place the cursor (+) on a target of interest (A in the illustrated example) by operating the trackball.

3. Press the [EBL OFFSET] key, 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 rotary 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 OTHER menu.

EBL

140.0°R

(a) Evaluating target ship’s course and CPA in relative motion mode

Cursor

EBL

118.2°R

(b) Target ship on collision course

VRM

3.85NM

VRM

0.00nm

No.1 EBL

Figure 1-17 How to assess risk of collision

1.21 Measuring Range and Bearing Between Two Targets

1. Press the [EBL ON] key to activate the No. 1 EBL. Press the [EBL OFFSET] key , and place the origin of the No.1 EBL on a target of interest (target 1 in Figure 1-18) by operating the trackball.

2. Turn the EBL rotary control until the EBL passes through another target of interest (target 2 in Figure 1-18).

1-15

3. Turn the VRM rotary control until the range marker on the No. 1 EBL aligns with target 2 in Figure 1-18. The active VRM readout at the lower-right corner of the screen indicates the distance between the two targets.

4. To return the EBL origin to the own ship position, press the [EBL OFFSET] key again.

Note: The target 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 the guard alarm against false targets.

You can repeat the same procedure on third and fourth targets by using the 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 OTHER menu.

EBL

80.0 R

Bearing from target A to target B

Range between target A and target B

No. 1 EBL No. 1 VRM

VRM

0.50NM

Figure 1-18 Measuring range and bearing

between two targets

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. The outer and inner boundaries can be set at any distance. The sector of the zone can be set anywhere between 0 and 360 degrees in any direction.

To set target alarm zones:

1. Press the [MENU] key.

2. Press the [3] key twice to show the TGT ALARM menu.

TGT ALARM

1. AREA NO1 NO2

2. MODE1 IN OUT

3. MODE2 IN OUT

Figure 1-19 TGT ALARM menu

2. Press the [1] key to select target alarm zone to use; NO1 or NO2.

1.22 Setting a Target Alarm Zone

CAUTION

The target alarm feature should never be relied upon as the sole means for detecting the risk of potential collision. The operator of a ship is not relieved of the responsibility to keep lookout for avoiding collisions, whether or not the radar 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.

3. Press the [ENTER/SELECT] key.

4. Press the [MENU] key.

5. Place the cursor (+) at point “A” (see figure below) using the trackball. Press the [GZ ALARM] key. GZ1 (or GZ2) SET appears. When both alarms are prepared the active alarm is circumscribed.

6. Move the cursor (+) to point “B” and press the [GZ ALARM] key again. Then, an echo watch zone as illustrated is created and the label IN (or OUT) replaces SET at the lower-right corner of the screen.

1-16

Target alarm zone

Figure 1-20 Target alarm

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 [GZ ALARM] key.

Two alarm zones can be set as described above. To change the active alarm zone, do steps 1 thru 4 in the above procedure. (When both alarms are prepared the active alarm is circumscribed.)

outward target alarm is produced when a target leaves the target alarm zone. (This is not a target alarm by definition but some users find this feature valuable.)

Dashed line: No alarm. Alarm sounds when target violates alarm setting.

Target alarm zone

INWARD ALARM

OUTWARD ALARM

Figure 1-21 Inward and outward alarms

1.23 Off-centering (shift)

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 a point specified by the cursor, up to 75% of ranges other than 72, 96 and 120 nm.

Acknowledging alarm

A target entering the target alarm zone produces both visual (flashing) and audible (beeping) alarms. To silence the audible alarm, press the [AUDIO OFF] key shortly. ACK replaces IN (or OUT).

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 the [GZ ALARM] key again.

To silence the audible alarm, you may press the [AUDIO OFF] key . However , in this case, the label ACK does not appear.

Deactivating target alarm zone

Hold the [GZ ALARM] key depressed for at least 5 seconds.

This feature is not available on the longest range scale or in the true motion mode. 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 [SHIFT] key. Then, the sweep origin is off-centered to the cursor position. However, the heading line is left in the same position.

3. To cancel of f-centering, press the [SHIFT] key again.

Cursor

Inward and outward alarms

The inward target alarm generates visual and audible warnings when a target enters the target alarm zone from any direction. The

(a) Select location with cursor.

(b) Press SHIFT key to offcenter.

Figure 1-22 Off-centered display

1-17

Note: The display is automatically shifted by

75% of the range in use whenever the cursor is placed at an edge of the effective display area.

1.24 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 scanner. On the other hand, unstable echoes such as sea clutter appear at random positions.

To distinguish real target echoes from sea clutter , echo average 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:

1. Press the [MENU] key.

2. Press the [5] key twice to select the ECHO SIG menu.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

3. Press the [2] key to select echo averaging level (OFF, 0.5 1, 2, 3) from the ECHO AVG field.

OFF: No averaging effect

0.5: Distinguishes small targets from

sea clutter.

1: Distinguishes 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/SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

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

Figure 1-24 Echo averaging

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 requires log and compass signals. If you wish to use this feature without a compass signal, consult a FURUNO representative.

Manual speed entry is done at the menu item MAN SPD on the OTHER menu, which is accessed by pressing the [MENU] and [0] (twice) keys.

1-18

Figure 1-23 ECHO SIG menu

1.25 Electronic Plotting Aid (EPA)

Plotting a target

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.

T arget data is shown in the data display area which shows range, bearing, course, speed, CP A and TCP A of the last-plotted or selected target.

Target data

000

010

350

320

310

See note

300

below.

290

280

See note

270

below.

260

250

Echo Watch Zone

240

230

220

340

330

210

200

020

030

040

140

150

160

190

170

180

050

120

130

060

070

080

090

100

110

TRUE VECTOR

30sec

EPA symbols : Target plotted : Target plotted and data indicated. : Target on a collision course

Note:

Target 2 is on a collision course as the extension of its vector goes through the own ship position. Placing the offset EBL will help for assessment. TCPA is counted up to 99.59 min and beyond that it is indicated as TCPA > 99.59 MIN.

Plotting time

RNG BRG CRS SPD CPA TPCA 00:25

Figure 1-25 EPA display

Note: The EPA requires speed input (automatic or manual) and a compass signal. The vector and data are updated on real time between plot entries, but do not neglect to plot a new position over a long period of time. Otherwise, the accuracy will be reduced. Note that the plots will be lost when the compass fails; start the plotting exercise again.

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

2. Press the [ACQ] key . A plot symbol (circle) and target number (0-9) appears on the target.

3. Watching the EP A time shown at the right side of the screen, wait for at least 30 seconds. Place the cursor (+) on the plot symbol with number and then press the [ENTER/SELECT] key . The symbol shape changes from circle to square and the target number in the data display flashes.

4. While the target number is flashing, place the cursor on the target and press the [ACQ] key . The plot symbol moves to the new target position and the previous position is marked by a small dot.

5. T o acquire other targets, repeat the above steps selecting different plot symbols.

6. If the target echo separates from its plot symbol, repeat steps 3 an 4.

Note: If a target once plotted is not plotted again within 10 minutes, the warning “UPDATE PLOT” and Plot No. will appear 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 five 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 the Time Alarm to warn yourself every 3 or 6 minutes.

Within 30 seconds, you can cancel a last plot by the [CANCEL/CLEAR] key and make a re-entry at a different position. After 30 seconds, the last entry is processed to produce a vector.

1-19

True or relative vector, vector time

Target data

Vectors can be displayed relative to own ship’s heading (Relative) or with reference to the North (True). This feature is available in all presentation modes (compass must be working correctly). The current vector mode is indicated at the upper-right corner of the screen.

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

1. Press the [MENU] key followed by the [7] key twice to select PLOT.

PLOT MENU 1

1. MARK DISP OFF ON

2. ERASE

3. VEC REF REL TRUE

4. VEC TIME 30S 1M 3M 6M 15M 30M

5. CPA SET OFF 0.5NM 1NM 1.5NM 2NM 3NM 4NM 5NM 6NM

6. TCPA SET 30S 1M 2M 3M

4M 5M 6M 12M 15M

7. TRACK OFF ON

8. AUDIO ALARM OFF ON

9. INTVAL* 30S 1M 2M 3M 6M

0. ↓*

* Requires ATA Board ARP-17.

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

In the 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. The target data field always displays true bearing, true course and speed over the ground.

Reading the target data

Place the cursor on a plotted target and press the [ENTER/SELECT] key . Then, the following target data is displayed at the right side of the CRT.

RNG/BRG (Range/Bearing): Range and bearing from own ship to last-plotted target with suffix “T” (True).

CSE/SPD (Course/Speed): Course and speed are displayed for the last-plotted target with suffix “T” (True).

CP A/TCPA: CPA (Closest Point of Approach) is the closest range the target will approach to own ship. TCPA is the time to CPA. Both CP A and TCPA are automatically calculated. TCPA is counted up to 99.59 min and beyond that it is indicated as TCPA > *99.59 MIN.

Figure 1-26 PLOT menu

2. Press the [3] key to select REL or TRUE from the VECT REF field as appropriate, and then press the [ENTER/SELECT] key.

3. Press the [4] to select appropriate vector time from the VEC TIME field, and then press the [ENTER/SELECT] key.

4. Press the [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.

1-20

Terminating target plotting

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

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 [CANCEL/CLEAR] key.

All Targets: To terminate plotting of all targets at once:

1. Press the [MENU] key followed by the [7] key twice.

2. Press the [2] key twice to select OFF from the ERASE field.

3. Press the [ENTER/SELECT] key followed by the [MENU] key.

Setting CPA/TCPA alarm ranges

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

PLOT MENU 1

1. MARK DISP OFF ON

2. ERASE

3. VEC REF REL TRUE

4. VEC TIME 30S 1M 3M 6M 15M 30M

5. CPA SET OFF 0.5NM 1NM 1.5NM 2NM 3NM 4NM 5NM 6NM

6. TCPA SET 30S 1M 2M 3M

4M 5M 6M 12M 15M

7. TRACK OFF ON

8. AUDIO ALARM OFF ON

9. INTVAL* 30S 1M 2M 3M 6M

0. ↓*

* Requires ATA Board ARP-17.

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.

CP A/TCP A 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 Alarm

The CPA/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 responsibillity to keep visual lookout for avoiding collisions, whether or not the radar or other plotting aid is in use.

Figure 1-27 PLOT menu

3. Press the [5] key for CPA SET or [6] key for TCPA set.

4. Press the [5] key or [6] key again to select CPA or TCPA range desired.

5. Press the [ENTER/SELECT] key to register your selection.

6. Press the [MENU] key to close the menu.

Silencing CPA/TCPA audible alarm

Press the [AUDIO OFF] key to acknowledge and silence the CPA/TCPA aural alarm.

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 trackball.

To set the CPA/TCPA alarm ranges:

1. Press the [MENU] key.

2. Press the [7] key twice to display the PLOT menu.

Lost target alarm

When the system detects a lost target, tracking on the target is discontinued and the target symbol becomes a flashing diamond. The normal plotting symbol is restored to the target when the target is manually acquired. If not reacquired the flashing diamond is automatically erased. To confirm a lost target, place the cursor on it and press the [CANCEL/CLEAR] key.

1-21

Past plot points

Past plot points may be marked on the display with as many as nine dots. Y ou can turn this display on/off as follows:

1. Press the [MENU] key.

2. Press the [7] key twice to select PLOT.

PLOT MENU 1

1. MARK DISP OFF ON

2. ERASE

3. VEC REF REL TRUE

4. VEC TIME 30S 1M 3M 6M

15M 30M

5. CPA SET OFF 0.5NM 1NM 1.5NM

2NM 3NM 4NM 5NM 6NM

6. TCPA SET 30S 1M 2M 3M

4M 5M 6M 12M 15M

7. TRACK OFF ON

8. AUDIO ALARM OFF ON

9. INTVAL* 30S 1M 2M 3M 6M

0. ↓*

* Requires ATA Board ARP-17.

Figure 1-28 PLOT menu

3. Press the [7] key to select OFF or ON from the TRACK field as appropriate.

4. Press the [ENTER/SELECT] key to register your selection followed by the [MENU] key to close the menu.

ments in accordance with their over-theground speeds and courses.

a) True target trails-no smearing of stationary targets

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

Figure 1-29 Target trails

Note: When relative trail on the TM mode, the legend REL TRAIL appears in red.

To select true or relative target trail presentation:

1. Press the [MENU] key.

1.26 Target Trails (Echo Trails)

It is possible to display the trails of the radar echoes of targets in the form of synthetic afterglow. Target trails are selected either relative or true and may be sea or ground stabilized. The simulated afterglow can be selected in a single tone or gradual shading depending on a setting on the TGT TRAIL menu. Note that afterglow is shown in light yellow when the echo color is green.

True or relative trails

Y ou may display target trails relative to north or own ship heading in Relative Motion. True motion trails require a compass signal and own ship speed input to cancel out own ship’s movement and present true target move-

2. Press the [2] key twice to show the TGT TRAIL menu.

TGT TRAIL

1. TIME 15S 30S 1M 3M 6M 15M 30M CONT

2. MODE REL TRUE

3. SHADE MONO MULTI

4. LEVEL 1 2 3

5. TRAIL COPY OFF ON

6. THIN TRAIL OFF ON

7. THIN MODE 1 2 3 4

Figure 1-30 TGT TRAIL menu

3. Press the [2] key several times to select REL or TRUE from the MODE field as appropriate.

1-22

4. Press the [ENTER/SELECT] key to confirm your selection, then the [MENU] key to close the menu.

Trail gradation

Selecting trail time

1. Press the [MENU] key.

2. Press the [2] key twice to select TGT TRAIL.

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

Monotone

(Single)

Gradual shading

(Multi)

Figure 1-31 Monotone and multitone

target trails

1. Press the [MENU] key.

2. Press the [2] key twice to select TGT TRAIL.

TGT TRAIL

1. TIME 15S 30S 1M 3M 6M 15M 30M CONT

2. MODE REL TRUE

3. SHADE MONO MULTI

4. LEVEL 1 2 3

5. TRAIL COPY OFF ON

6. THIN TRAIL OFF ON

7. THIN MODE 1 2 3 4

Figure 1-32 TGT TRAIL menu

3. Press the [3] key to select MONO or MULTI from the SHADE field as appropriate.

4. Press the [ENTER/SELECT] key and the [MENU] key in order.

TGT TRAIL

1. TIME 15S 30S 1M 3M 6M 15M 30M CONT

2. MODE REL TRUE

3. SHADE MONO MULTI

4. LEVEL 1 2 3

5. TRAIL COPY OFF ON

6. THIN TRAIL OFF ON

7. THIN MODE 1 2 3 4

Figure 1-33 TGT TRAIL menu

3. Press the [1] key to select time desired from the TIME field.

4. Press the [ENTER/SELECT] key and the [MENU] key in order.

Restoring trails

Trails are cancelled and restarted whenever the range is changed. However, you can continue trails on the same range, without restarting, when the range is changed to a next larger or smaller range scale. Note however that when the range is changed, only those target trails within the previous range are continued; no trails are generated for targets outside of the previous range.

No trail generated for target not within previous range

Displaying, erasing target trails

Press the [TGT TRAIL] key to activate or deactivate the target trails feature. The current target trail setting is displayed at the upper right-and corner of the screen.

To remove trails from the screen, press the [TGT TRAIL] with a hit-and-release action. (Trailing continues off screen with target trail timer counting). Press the key again to redisplay the trails.

(a) Previous range

(b) New range

Figure 1-34 How trail copy works

1. Press the [MENU] key.

2. Press the [2] key twice to select TGT TRAIL.

1-23

3. Press the [5] key to select ON or OFF from the TRAIL COPY field as appropriate.

4. Press the [ENTER/SELECT] key and [MENU] key in order.

Thin trails

T arget trails may be painted with thinner lines if desired. This can be useful when there are a lot of targets on the screen.

Resetting target trails

T o reset (or clear) the target trail memory , hold the [TGT TRAIL] key depressed for about 3 seconds. Target trails are cleared and the trailing process restarts from time count zero at current target trail plot interval. Note that target trails are also restarted when the shift feature is turned on or the range is changed.

Trail brilliance

The brilliance of target trails can be adjusted on the BRILL menu as follows:

1. Press the [MENU] key.

2. Press the [9] key twice to display the BRILL menu.

BRILL

1. TGT TRAIL

2. CHARACTER

3. HDG LINE

4. EBL/VRM

5. CURSOR

6. MARK

7. PLOT

8. OS SYMB

9. ↓* * Requires RP-17 Board.

1. Press the [MENU] key.

2. Press the [2] key twice to select TGT TRAIL.

3. Press the [6] key to show THIN TRAIL ON or OFF as appropriate.

4. Press the [7] key to select 1, 2, 3 or 4 as appropriate. When there are a lot of targets on the screen, select a larger number (for thinner trails); select a smaller number when there are few targets. The default setting is 1.

5. Press the [ENTER/SELECT] key and [MENU] key in order.

Trail afterglow

The strength of the synthetic afterglow to remain on the display may be selected as follows:

1. Press the [MENU] key.

2. Press the [2] key twice to select TGT TRAIL.

3. Press the [4] key to select desired level from the LEVEL field; “3” displays only the highest level of afterglow.

4. Press the [ENTER/SELECT] key and [MENU] key in order.

Figure 1-35 BRILL menu

3. Press the [1] key twice to select TGT TRAIL.

4. Operate the VRM rotary control to adjust brilliance. Current brilliance is shown by the BRILL bar graph at the top right-hand corner of the screen.

5. Press the [ENTER/SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

1-24

1.27 Parallel Index Lines

To use the origin mark:

Parallel index lines are useful for keeping a constant distance between own ship and a coastline or a partner ship when navigating. The orientation of the index lines is controlled with the EBL rotary control and the intervals between the lines adjusted with the VRM rotary control (provided that No.2 VRM is active).

Index lines

Figure 1-36 Index lines

Displaying/erasing the index lines

Press the [INDEX LINE] key to display/erase the index lines. Each press of the key turns the parallel index lines on (enabling adjustment by VRM, EBL), fixes them on the display or turns them off.

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

2. Press the [MARK] key. The origin mark appears at the cursor position, of which range and bearing are indicated at the upper-right section of the screen.

Origin mark reference

The origin mark can be set relative to own ship (relative), or referenced to land (sea or ground stabilized).

1. Press the [MENU] key.

2. Press the [8] key twice to select MARK.

MARK

1. ERASE

2. MODE REL TRUE

Figure 1-37 MARK menu

3. Press the [2] to select the REL or TRUE from the MODE field as appropriate.

4. Press the [ENTER/SELECT] key.

5. Press the [MENU] key.

Selecting number of index lines to display

Maximum number of the index lines can be set for 2 or 6 on the MARK/LINE in the OTHER menu.

1.28 Origin Mark

You can mark any reference points, prominent target or a point of particular interest using the origin mark feature. This mark is geographically fixed, namely, ground stabilized. Twenty such origin marks can be entered. This function is not available when the RP-17 board is installed.

Erasing origin marks

Erasing individual origin marks

Select the origin mark with the cursor and then press the [CANCEL/CLEAR] key.

Erasing all origin marks

1. Press the [MENU] key.

2. Press the [8] key twice to select MARK.

3. Press the [1] key twice.

4. Press the [MENU] key.

1-25

1.29 Zoom

The zoom function is useful for enlarging an area of interest as large as twice the normal viewing. This performs the range scale reduction to a half and the offset at the same time. Zoom can be used on ranges other than

0.125, 72, 96, 120 nm.

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

2. Press the [ZOOM] key. The area around the cursor and own ship is enlarged twice as large as the original size.

3. T o cancel zoom, press and hold down the [ZOOM] key about two seconds.

Note: The zoom feature is inoperative when the display is off centered.

Cursor

Temporarily erasing heading line, north marker, stern marker, own ship symbol

To temporarily extinguish the heading line, north marker, stern marker and own ship symbol to look at a target which may be obscured by those markers, press the GAIN control (HL OFF control). The heading line, north marker , stern marker and own ship symbol reappear when the control is released. Note that the RP screen is also temporarily erased when the RP-17 is connected.

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. It can be displayed/erased on the item MARK/LINE in the OTHER menu.

(a) Cursor placed at point of interest

Figure 1-38 Zoom

(b) Press ZOOM key to zoom in.

1.30 Markers

Heading line

The heading line indicates the ship’s heading in all presentation modes, and 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, it changes the orientation depending on the ship orientation in the north-up and true motion modes.

Own ship symbol

The own ship symbol appears at own ship position. It can be displayed/erased on the item MARK/LINE in the OTHER menu. The symbol is scaled to indicate length and beam of the vessel. If the largest dimension of the symbol gets smaller than 6 nm, the symbol will disappear and own ship will be represented by a small dot or circle. The size of the symbol is set at installation.

1-26

1.31 User Keys (F1, F2, F3)

The user keys [F1], [F2] and [F3] may be programmed by the operator to display a desired menu. For example, you can program the [F2] key to select target trail time whenever the key is pressed.

The default settings are [F1], echo averaging; [F2], echo stretch and [F3], clutter sweep.

Presetting the user keys

4. Select desired function with the VRM rotary control.

5. Press the [ENTER/SELECT] key to register your selection, and then press the [MENU] key to finish.

Activating a user-defined key

Press a user key. Press the key again to select option desired.

1. Press the [MENU] key.

2. Press the [6] key twice to display the FUNC menu.

FUNC

1. FUNC1

2. FUNC2

3. F•1

4. F•2

5. F•3

6. A/D CURVE A B C D

Figure 1-39 FUNC menu

3. Press [3], [4], or [5] key twice depending on which user key you want to set. For example, press the [4] key to program the [F2] key.

[F•2 MENU]

1. TRAIL TIME 26. HUTB MODE

2. TRAIL MODE 27. TUNE A/M

3. TRAIL SHADE 28. EXT WP

4. TRAIL LEVEL 29. OS POSN

5. ALARM AREA 30. CURS BRG

6. ALARM MODE 31. EBL1 T/R

7. PANEL DIMMER 32. EBL2 T/R

8. TGT COLOR 33. CURS RNG

9. ECHO AVG 34. VRM1 RNG

10. INT REJ 35. VRM2 RNG

11. ECHO STRETCH 36. CLTR SWEEP

12. NOISE REJ 37. MARK MENU

13. ECHO ENHANCE 38. DISP MODE

14. 2ND ECHO 39. A/D CURVE

15. CONTRAST 40. ORIGIN MARK

16. PLOT MENU 41. DEST ON CSR

17. MARK MODE

18. BRILL MENU

19. DRIFT MENU

20. NAV DATA

21. DISPLAY

22. SART

23. TIME ALARM

24. STERN MARK

25. OS MARK Select by VRM knob

and hit ENTER key.

37 and 38 shown with connection of RP-17.

1.32 Function Keys

The function keys work similar to the automatic dialing feature on a telephone, playing back control settings just as they were registered. Instead of manually adjusting controls to set up for a particular condition, for example, navigation in a harbor, you can have a function key do it for you.

Each function key can be assigned a combination of particular radar settings that will be most suited to a specPic navigation purpose, and an adhesive-backed label (such as OCEAN, COAST) is usually attached to the keytop for easy identification of the assigned purpose.

Presetting the function keys

The radar’s internal computer offers several navigation setups as outlined in the table on the next page. For instance, you might want to select RAIN as the objective of a function key. Then, when you press that function key the radar will be instantly set up to operate under heavy rain conditions.

Each 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, noise rejector, video contrast, and enhanced video.

Figure 1-40 Function menu

1-27

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.

Table 1-2 FUNC key objectives

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TSAOCegnartrohsrofgnittesmumitpO

elacsegnaragnisunoitceted

mlacnomn6dna5.1neewteb

.saes

NAECOegnargnolrofgnittesmumitpO

elacsegnaragnisunoitceted

.mn42dna6neewteb

AES-RsaesyvaehrofgnittesmumitpO

3neewtebelacsegnaragnsu

.mn21dna

NIARniaryvaehrofgnittesmumitpO

elacsegnaragnisusnoitidnoc

.mn42dna6neewteb

N-DRIBgnitcetedrofgnittesmumitpO

elacsegnaragnisusdrib

.mn8dna3neewteb

F-DRIBgnitcetedrofgnittesmumitpO

elacsegnaragnisusdrib

.mn42dna61neewteb

1. Press the [MENU] key followed by the [6] key twice to display the FUNC menu.

2. Press [1] or [2] key twice to select function to program. For example, press the [1] key to program FUNC1. The following menu appears.

FUNC 1 MENU

1. ↑

2. FUNC SEL COAST OCEAN R-SEA RAIN BIRD-N BIRD-F

3. ECHO AVG OFF 0.5 1 2 3

4. INT REJ OFF 1 2 3

5. STRETCH OFF 1 2

6. N REJ OFF ON

7. ENHANCE OFF ON

8. CONTRAST OFF 1 2 3

9. A/C AUTO OFF ON

Figure 1-42 FUNC1 menu

3. Press the [2] key twice to select function desired.

4. Change other functions (echo avg, int rej, etc.) if necessary.

5. Press the [ENTER/SELECT] key to register your selection followed by the [MENU] key to close the menu.

FUNC

1. FUNC1

2. FUNC2

3. F•1

4. F•2

5. F•3

6. A/D CURVE A B C D

Figure 1-41 FUNC menu

Table 1-3 Default function key settings

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lebaLOHCE.3

GVA

TSAOC11FFOFFOFFO2FFO NAECO11FFOFFOFFO2FFO

AES-R21FFOFFOFFO2NO

NIAR5.01 FFOFFOFFO2FFO

N-DRIB21FFONOFFO2FFO F-DRIB312NOFFO3FFO

TNI.4

JER

HCTERTS.5JERN.6ECNAHNE.7-NOC.8

TSART

C/A.9

OTU/A

1-28

1.33 Suppressing Second-trace

1.34 Adjusting Brilliance of

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 [MENU] key followed by the [5] key twice to display the ECHO SIG menu.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

Figure 1-43 ECHO SIG menu

Screen Data

You can adjust relative brilliance levels of various marks and alphanumeric readouts displayed on the screen as follows:

1. Press the [MENU] key.

2. Press the [9] key twice to show the BRILL menu.

BRILL

1. TGT TRAIL

2. CHARACTER

3. HDG LINE

4. EBL/VRM

5. CURSOR

6. MARK

7. PLOT

8. OS SYMB

9. ↓* * Requires RP-17 Board.

Figure 1-44 BRILL menu

3. Press appropriate numeric key twice to select item to adjust. For example, press the [1] key if you want to change the brilliance of target trails.

2. Press the [6] key to select OFF or ON from the 2ND ECHO field as appropriate.

3. Press the [ENTER/SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

4. Operate the VRM rotary control to adjust brilliance. Current brilliance level is displayed on the selected item’s bar graph. The adjustment range is as follows;

1. ECHO TRAIL: 10%-50%

2. CHARACTER, 3. HDG LINE: 50% 100%

4. EBL/VRM, 5. CURSOR, 6. MARK,

7. PLOT, 8. OS SYMB: 0%-100%

5. Press the [ENTER /SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

1-29

1.35 Noise Rejector

The noise rejector suppresses white noise, which appears on the screen as many dots scattered randomly over the display.

To suppress white noise:

1. Press the [MENU] key.

2. Press the [2] key to select desired interval (3, 6, 12, 15, 20 min) from the ALM INTVL field.

3. Press the [ENTER/SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

2. Press the [5] key twice to show the ECHO SIG menu.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

Figure 1-45 ECHO SIG menu

3. Press the [4] to select OFF or ON from the N REJ field as appropriate.

4. Press the [ENTER/SELECT] key to conclude your selection followed by the [MENU] key to close the menu.

1.36 Time Alarm

The time alarm gives an aural at a predetermined interval.

1.37 Enhanced Video

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 enhanced video function. It enlarges target echoes in bearing and range direction on 1.5-6 nm scales.

1. Press the [MENU] key followed by the [5] key twice to show the ECHO SIG menu.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

T o silence the alarm, press the [AUDIO OFF] key. The label T-ALM turns to normal color and the timer is reset to initial value and starts the count-down sequence again.

To activate the time alarm:

1. Press [MENU], [0] twice and [4] twice to display the TIME ALARM.

TIME ALARM

1. ↑

2. ALARM INTV OFF 3M 6M 12M 15M 20M

Figure 1-46 TIME ALARM menu

1-30

Figure 1-47 ECHO SIG menu

2. Press the [5] key to select OFF or ON from the ENHANCE field.

3. Press the [ENTER/SELECT] key , and then press the [MENU] key.

Echo enlarged in bearing and range directions

Figure 1-48 How the enhance

function works

Note: Enhanced video can also be selected with a user key.

4. Press the [2] key to select desired degaussing interval (OFF , 1, 5, 10 min) from the DEGS INTV field, and then press the [ENTER/SELECT] key.

5. Press the [3] key to select desired degaussing degree (45°, 90°, 135°) from the DEGS DEG field. For example, selecting 45° will automatically degauss the screen when the ship makes a turn which is between 45° and 89°.

6. Press the [ENTER/SELECT] key followed by the [MENU] key.

1.39 Navigation Data

1.38 Degaussing Interval

The screen is degaussed automatically at certain time intervals, as well as each time the radar is turned on, to demagnetize the CRT screen to eliminate color contamination caused by earth’s magnetism or magnetized ship structure. You can select the degaussing interval and the degaussing degree as follows:

1. Press the [MENU] key followed by the [0] key twice to select OTHER.

2. Press the [0] key twice to select the OTHER menu.

OTHER

1. ↑

2. TEST

3. DEGAUSS

4. TIME ALARM

5. RANGE

6. INSTALL

Various navigation data can be displayed (and their format selected) with connection of appropriate external sensors. You can select which navigation data to display as follows:

1. Press the [MENU] key, and then the [0] key twice show the OTHER menu.

2. Press the [8] key twice to select display the NAV DATA menu.

3. Press appropriate numeric key to turn data on/off, select format, etc. Press the [ENTER/SELECT] key after setting each option. Water temperature and depth displays are off in the default setting.

Note 1: OFF in the OS POSN field simply erases own ship position data; it does not stop input of nav data from a navigation device.

Note 2: TIME DIF selects time system to use; UTC or LOCAL. UTC = Local + T ime Dif.

Figure 1-49 OTHER menu

3. Press the [3] key twice to display the DEGAUSS menu.

DEGAUSS

1. ↑

2. DEGS INTV OFF 30S 1M 2M

3. DEGS DEG OFF 45° 90° 135°

Figure 1-50 DEGAUSS menu

4. Press the [MENU] key. All navigation data may be turned on/off by

the keying sequence of [MENU], [0] (twice) and [5].

1-31

1.40 Video Contrast

The video contrast is adjustable in three levels according to the radar video sampling level. Select the level so that the video contrast feature changes the dynamic range of the video signal to improve picture contrast. Picture shows up most clearly from the background.

1. Press the [MENU] key.

2. Press the [5] key twice to display the ECHO SIG menu.

ECHO SIG

1. TGT COLOR YEL GRN COLOR

2. ECHO AVG OFF 0.5 1 2 3

3. INT REJ OFF 1 2 3

4. N REJ OFF ON

5. ENHANCE OFF ON

6. 2ND ECHO OFF ON

7. CONTRAST 1 2 3

8. CLTR SWEEP OFF ON(LINK) ON(FIX)

9. SWEEP LVL 1 2 3

0. CNTR ENHANCE OFF ON

3. Press the [8] key to turn on/off the clutter sweep function, and then press the [ENTER/SELECT] key.

OFF: Turns off clutter sweep

feature.

ON(LINK): Sweep area moves with

trackball operation. Sweep cursor shown by dashed lines.

ON(FIX): Sweep area is fixed on the

screen. Sweep cursor shown by solid lines.

4. Press the [9] key (SWEEP LVL) several times to select level of suppression to use; “3” provides the highest level of noise suppression.

5. Press the [ENTER/SELECT] key to register your selection and the [MENU] key to finish.

6. Operate the trackball to select area to process.

Select area to process with square cursor.

Figure 1-51 ECHO SIG menu

3. Press the [7] key to select desired contrast level from the CONTRAST field.

4. Press the [ENTER/SELECT] key to register you selection and the [MENU] key to finish.

1.41 Clutter Sweep

The clutter sweep feature suppresses sea and rain clutters within the trackball-selected area, to discriminate specific targets from noise. The user may select the area to process and the level of suppression to apply as follows:

1. Press the [MENU] key.

2. Press the [5] key twice to select the ECHO SIG menu.

Figure 1-52 Selection of area to

process with clutter sweep

The clutter sweep feature may also be activated by a user key.

1.42 Outputting Target Position

Target position can be output (in IEC 611621 format) to a video plotter and marked on its screen with a symbol. Select target with the trackball and push the A/C RAIN control. (TLL) This function requires position data and compass signal.

1-32

1.43 Background Color

3. Press the [5] key twice to select RANGE.

The secondary function of the BRILL control (BKGND COLOR) is to select the color of the background, characters, menu, markers and indications, from the five color combinations shown in the table below. Each press of the control selects one of the five color combinations.

Table 1-4 Available color combinations

tnemegnarrA12345

aerA

yalpsiDradaR

aerAyalpsiD

sretcarahCNRGNRGNRGTHWDER

uneMLEYLEYLEYLEYDER

MRV/LBEULB-LNRGNRGNRGULB-L

sgniRegnaRNRGTHWTHWTHWNRG

rosruCTHWNRGNRGNRGTHW

eniLgnidaeHNRGTHWTHWTHWNRG

mralAtegraT

enoZ

rekraMhtroNTHWULB-LULB-LULB-LTHW rekraMnretSTHWULB-LULB-LULB-LTHW

KLBULBULBULBKLB

radaRedistuO

KLBKLBKLBULBKLB

thgilhgiHuneMLEYLEYLEYLEYDER

THWULB-LULB-LULB-LTHW

wolleY,LEY,neerG,NRG

;etihW,THW;eulb-thgiL,ULB-L;eulB,ULB;kcalB,KLB

RANGE

1. ↑

2. RANGE 1/8 1/4 1/2 3/4 1 1.5 2 3 4 6 8 12 16 24 32 48 72 96 120

Figure 1-54 RANGE menu

4. Press the [2] key to place the underline under the range scale to select/deselect and then press the [ENTER/SELECT] key . Active ranges are highlighted. Repeat to select/deselect other ranges.

5. Press the [MENU] key.

1.45 Selecting Bearing Scale

Format

The bearing scale may be displayed in degrees or compass points or degrees as follows:

1. Press the [MENU] key.

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

1.44 Selecting Range Scales

Range scales to use may be selected as follows:

1. Press the [MENU] key.

2. Press the [0] key four times to display the OTHER sub menu.

OTHER

1. ↑

2. TEST

3. DEGAUSS

4. TIME ALARM

5. RANGE

6. INSTALL

Figure 1-53 OTHER sub menu

3. Press the [6] key twice to display the MARK/LINE menu.

MARK/LINE

1. ↑

2. INDEX LINES 2 6

3. STERN MARK OFF ON

4. SHIP’S MARK OFF ON

5. BEARING SCALE 360 COMPASS

Figure 1-55 MARK/LINE menu

4. Press the [5] key to select 360 (degrees) or COMPASS.

5. Press the [ENTER/SELECT] key to register your selection and the [MENU] key to close the menu.

1-33

1.46 A/D Converter Curve

1.47 Enlarging Close-in Targets

Setting

Video signal threshold level and color output setting (for the CRT) are executed when the video signal is converted from analog to digital. Select the A/D curve according to objective referring to the table below. The default setting is A.

1. Press the [MENU] key.

2. Press the [6] key twice to display the FUNC menu.

FUNC

1. FUNC1

2. FUNC2

3. F•1

4. F•2

5. F•3

6. A/D CURVE A B C D

The center enhance feature enlarges all echoes within the first range on any range.

1. Press the [MENU] key.

2. Press the [5] key twice to display the ECHO SIG menu.

3. Press the [0] key to turn CNTR ENHANCE on or off.

4. Press the [ENTER/SELECT] key followed by the [MENU] key.

Figure 1-56 FUNC menu

3. Press the [6] key to select A/D curve setting, referring to the table below.

4. Press the [ENTER/SELECT] key followed by the [MENU] key.

Table 1-5 A/D curve settings

tubneergfotolA

.derelttil

.roloc

.derfotol

.derdna

.derfotol

nineergsiesioN

dnaAneewteB

tubneergelttiL

.esioneniF

wolleyniesioN

tubneergelttiL

.esioneniF

.derniesioN

Cnaht

noitcetedtaolF

snoitcelferaesecudeR

noitagivanlareneG

roflufesU:esulamroN

noitanimircsidtegrat

noitcetedegnargnoL

noitcetedyouB

noitcetedegnargnoL

noitcetedyouB

noitcetedegnarregnoL

1-34

1.48 Alarms

The table below shows the alarm indications which appear on the display screen.

Table 1-6 Alarms

tluaFmralaelbiduAmralalausiVsutatsmralatiuqoT

eruliafgnidaeHspeebgnidaeHlebalsdaer

egassemehtdna"°x.xxx"

"GNISSIMLANGISORYG"

.dernisraeppa

yllacitamotuasiyalpsiD

edompu-daeHotdehctiws

nim1nihtiw.

tegraTmralaspeeB.sehsalftegraT.yek]MRALATGT[sserP

mralahctaWspeeB00:0HCTAW

snrut"MITHCTAW"lebaL( sezeerftnuocemitdnader

.)".00:0"ta

nol/talpihsnwO

nol/talrosruC

eruliafmetsySenoNLANGISIZA"egasseM

tcerrocnI

ekortsyek

enoNnoitisoppihsnwoni"x.xxx"

dleif

noitisoprosrucni"x.xxx"

dleif

oN.sraeppa"GNISSIM

.seohceradar

enotpeebelbuoDenoNdednopsersiekortsyektcerroC

neercs-noehthctaMGDH

tuodaerlautcaehthtiw

gnidaerssapmoc.yrassecenfi,

sserpmralaelbiduapotsoT

.yek]FFOOIDUA[eht

.)22.1noitceS(

yek]FFOOIDUA[ehtsserP.

otsnrutHCTAWlebalehT

siremitehtdnaoedivlamron

teser)63.1noitceS(.

pihsnwotahterusekaM

morfdefsiatadnoitisop

.tnempiuqevanoidarlanretxe

tahtdedivorppeebelgnisayb

tadetcelessiNOPEEBYEK

.noitallatsni

eruliafgoLspeeb2GOLS"dna"x.xx"GOL

eruliafSFPEpeebsuounitnoC:SFPE(derniSFPE

noitacidniGOSenoNtasraeppa)derni(GOS

ROTCEVEURT

noitacidni

enoN)der(ROTCEVEURT

ehtesu,deliafsahgolehtfI

,raeppa"GNISSIMLANGIS

roftupnisilangisgolonfi

pihsnwoelihwces03

nahtsselneebsahdeeps

.tk5.0

gnidniF-noitisoPcinortcelE

oslanoitacidniehT.)metsyS

SPGehtnehwsraeppa

neewtebdehctiwssiedom

.SGPDdnaSPG

nehwrenrocthgirpoteht

nodetcelessinoitpoGOS

detaicossaehttubunemeht

atcetedotsliafEMDS

dnadeepsgnikcartmottob

deepS"ehtotsegnahc

)TW-S("retawehthguorht

.yllacitamotuaedom

ataddnocesehtnisraeppa

noitatneserpehtnehwllec

ehtniffoseog;MRsiedom

.MTpu-htroN

.rosnesetairporppa

.yek]FFOOIDUA[

tonseodradarehT

rehtoro,edomdeepSlaunaM

ehtsserp,peebehtecnelisoT

otflestiteseryllacitamotua

fineveatadGOSnaeviecer

mottobasniagerEMDSeht

GOSesareoT.deepsgnikcart

,]UNEM[sserp,)der(noitacidni

.]UNEM[,]TW-Stceles[,]0[

1-35

Table 1-6 Alarms (con’t)

tluaFmralaelbiduAmralalausiVsutatsmralatiuqoT

langisoediV

eruliaf

enilgnidaeH

eruliaf

gnittolpAPEenoNtahtsmrofniTOLPETADPU

noisillocnotegraT

esruoc

speeBnehwsraeppaNOISILLOC

peebsuounitnoCGNISSIMLANGISOEDIV

peebsuounitnoCGNISSIMLANGISLH

ehtsserp,peebehtecnelisoT

.sraeppa

.degnahcsi

.sraeppa

.degnahcsi

ecnosawhcihwtegrata

-erneebtonsahdettolp .setunim01nihtiwdettolp

tegratdekcart-ATAro-APE

.esruocnoisillocnosi

.ffo

.tegratehtkcart

rezzuB.yek]FFOOIDUA[

egnarehtnehwniagasdnuos

ehtsserp,peebehtecnelisoT

rezzuB.yek]FFOOIDUA[

egnarehtnehwniagasdnuos

tegratgnihsalfehteriuqcaeR

ehtdragersidro,nim5nihtiw

otyrassecentonsitifitegrat

ronoitcaevisaveekaT

.tegratfognikcartetanimret

seognoitacidnilausiv,nehT

1.49 Peformance Monitor

The performance monitor (PM-30 for FR-1710/1725, PM-50 for 1760DS) provides an effective means of general performance check of a radar installation. It works like a transponder. Installed in the proximity of the radar antenna, it is triggered by part of the transmitted microwave energy and sends back a coded signal to the antenna for display on the radar screen. Overall performance can be checked from the range, size and number of arcs displayed on the radar screen. For further details see the operator’s manual of the performance monitor.

To turn on the performance monitor:

1. Press the [MENU] key.

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

3. Press the [5] key twice to open the DISPLAY menu.

1. ↑

2. NAV DATA OFF ON

3. DISPLAY MAIN SUB

4. SART OFF ON

5. P M OFF ON

DISPLAY

Figure 1-57 DISPLAY menu

4. Press the [5] key to select ON or OFF from the P M field as appropriate.

5. Press the [ENTER/SELECT] key followed by the [MENU] key. When the performance monitor is turned on the radar is automatically set up as follows: IR,

Off; ECHO AVG, Off; ES, Off; A/C AUTO, Off, N REJ, Off, RANGE, 24 nm.

1-36

RADAR OBSERVATION

2.1 General

Minimum and maximum ranges

Minimum range

The minimum range is defined by the shortest distance at which, using a scale of 1.5 or

0.75 nm, a target having an echoing area of

10 m

is still shown separate from the point

representing the scanner position. It is mainly dependent on the pulselength,

scanner height, and signal processing such as main bang suppression and digital quantization. It is a good practice to use a shorter range scale as far as it gives favorable definition or clarity of picture. The IMO Resolution A. 477 (XII) and IEC 936 require the minimum range to be less than 50 m. All FURUNO radars satisfy this requirement.

Maximum range

The maximum detecting range of the radar, Rmax, varies considerably depending on several factors such as the height of the scanner above the waterline, the height of the target above the sea, the size, shape and material of the target, and the atmospheric conditions.

Under normal atmospheric conditions, the maximum range is equal to the radar horizon or a little shorter. The radar horizon is longer than the optical one by about 6% because of the diffraction property of the radar signal. The Rmax is given in the following equation.

= 2.2 x ( h1 + h2 )

max

where Rmax: radar horizon (nautical miles)

h1: scanner height (m)

h2: target height (m)

For example, if the height of the scanner above the waterline is 9 meters and the height of the target is 16 meters, the maximum radar range is;

= 2.2 x ( 9 + 16 ) = 2.2 x (3 + 4) = 15.4 nm

max

It should be noted that the detection range is reduced by precipitation (which absorbs the radar signal).

X-band and S-band

In fair weather, the above equation does not give a significant difference between X- and S-band radars. However, in heavy precipitation condition, an S-band radar would have better detection than an X-band radar.

Radar resolution

There are two important factors in radar resolution (discrimination): bearing resolution and range resolution.

Bearing resolution

Bearing resolution is the ability of the radar to display as separate pips the echoes received from two targets which are at the same range and close together. It is proportional to the scanner length and reciprocally proportional to the wavelength. The length of the scanner radiator should be chosen for a bearing resolution better than 2.5° (IMO Resolution). This condition is normally satisfied with a radiator of 1.2 m (4 ft) or longer in the Xband. The S-band radar requires a radiator of about 12 feet (3.6 m) or longer.

Radar horizon

Optical horizon

Figure 2-1 Radar horizon

2-1

Range resolution

2.2 False Echoes

Range resolution is the ability to display as separate pips the echoes received from two targets which are on the same bearing and close to each other. This is determined by pulselength only. Practically, a 0.08 microsecond pulse offers the discrimination better than 35 m as do so with all FURUNO radars.

Test targets for determining the range and bearing resolution are radar reflectors hav-

ing an echoing area of 10 m

Bearing accuracy

One of the most important features of the radar is how accurately the bearing of a target can be measured. The accuracy of bearing measurement basically depends on the narrowness of the radar beam. However, the bearing is usually taken relative to the ship’s heading, and thus, proper adjustment of the heading line at installation is an important factor in ensuring bearing accuracy . T o minimize error when measuring the bearing of a target, put the target echo at the extreme position on the screen by selecting a suitable range.

Occasionally echo signals appear on the screen at positions where there is no target or disappear even if there are targets. They are, however, recognized if you understand the reason why they are displayed. Typical false echoes are shown below.

Multiple echoes

Multiple echoes occur when a transmitted pulse returns from a solid object like a large ship, bridge, or breakwater. A second, a third or more echoes may be observed on the display at double, triple or other multiples of the actual range of the target as shown below. Multiple reflection echoes can be reduced and often removed by decreasing the gain (sensitivity) or properly adjusting the A/C SEA control.

True echo

Target

Own ship

Multiple echo

Range measurement

Measurement of the range to a target is also a very important function of the radar. Generally, there are two means of measuring range: the fixed range rings and the variable range marker (VRM). The fixed range rings appear on the screen with a predetermined interval and provide a rough estimate of the range to a target. The variable range marker’s diameter is increased or decreased so that the marker touches the inner edge of the target, allowing the operator to obtain more accurate range measurements.

Figure 2-2 Multiple echoes

Sidelobe echoes

Every time the radar pulse is transmitted, some radiation escapes on each side of the beam, called “sidelobes.” If a target exists where it can be detected by the side lobes as well as the main lobe, the side echoes may be represented on both sides of the true echo at the same range. Side lobes show usually only on short ranges and from strong targets. They can be reduced through careful reduction of the gain or proper adjustment of the A/C SEA control.

2-2

Shadow sectors

;

Target A

Target B (Spurious)

Target B (True)

Figure 2-3 Sidelobe echoes

Virtual image

A relatively large target close to your ship may be represented at two positions on the screen. One of them is the true echo directly reflected by the target and the other is a false echo which is caused by the mirror effect of a large object on or close to your ship as shown in the figure below. If your ship comes close to a large metal bridge, for example, such a false echo may temporarily be seen on the screen.

Target ship

Funnels, stacks, masts, or derricks in the path of the scanner block the radar beam. If the angle subtended at the scanner is more than a few degrees, a non-detecting sector may be produced. Within this sector targets can not be detected.

Radar antenna

Radar mast

Shadow sector

Figure 2-5 Shadow sectors

Own ship

True

echo

Mirror image

of target ship

Figure 2-4 Virtual image

False echo

2.3 SART (Search and Rescue T ransponder)

A Search and Rescue Transponder (SART) may be triggered by any X-Band (3 cm) radar within a range of approximately 8 nm. Each radar pulse received causes it to transmit a response which is swept repetitively across the complete radar frequency band. When interrogated, it first sweeps rapidly (0.4 µs) through the band before beginning a relatively slow sweep (7.5 µs) through the band back to the starting frequency. This process is repeated for a total of twelve complete cycles. At some point in each sweep, the SART frequency will match that of the interrogating radar and be within the pass band of the radar receiver. If the SART is within range, the frequency match during each of the 12 slow sweeps will produce a response on the radar display, thus a line of 12 dots equally spaced by about 0.64 nautical miles will be shown.

2-3

When the range to the SART is reduced to about 1 nm, the radar display may show also the 12 responses generated during the fast sweeps. These additional dot responses, which also are equally spaced by 0.64 nm, will be interspersed with the original line of 12 dots. They will appear slightly weaker and smaller than the original dots.

Screen B: When SART is close

1.5 NM

Lines of 12 dots are displayed in concentric arcs.

Own ship's position

Radar receiver bandwidth

Echo of SART

Position of SART

Screen A: When SART is distant

Echo of SART

24 NM

Own ship's position

9500 MHz 9200 MHz

Radar antenna beamwidth

SART mark length

Sweep time

7.5 µs 95 µs

2. Press the [0] key twice.

3. Press the [5] key twice select DISPLAY.

DISPLAY

1. ↑

2. NAV DATA OFF ON

3. DISPLAY MAIN SUB

4. SART OFF ON

Figure 2-8 DISPLAY menu

4. Press the [4] key several times to select OFF or ON from the SART field as appropriate.

5. Press the [ENTER/SELECT] key followed by the [MENU] key.

When the SART function is turned on the range is set to 12 nm, the noise rejector, echo averaging, AUTO A/C and interference rejector are turned off, and SART is displayed at the upper left-hand corner of the screen.

Sweep start

Low speed sweep signal

High speed sweep signal

Figure 2-6 Appearance of SART signal on

the radar display

Showing SART marks on the radar display

A range scale between 6 and 12 nm with normal radar settings should display SART signals. However , this radar has a special feature which enhances the SART signals.

1. Detune the radar. Press the [MENU] key followed by the [0] key twice to display the OTHER menu.

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓

General remarks on receiving SART

SART range errors

When responses from only the 12 low frequency sweeps are visible (when the SART is at a range greater than about 1 nm), the position at which the first dot is displayed may be as much as 0.64 nm beyond the true position of the SART. When the range closes so that the fast sweep responses are seen also, the first of these will be no more than 150 meters beyond the true position.

Radar bandwidth

This is normally matched to the radar pulselength and is usually switched with the range scale and the associated pulselength. Narrow bandwidths of 3-5 MHz are used with long pulses on long range and wide bandwidths of 10-25 MHz with short pulses on short ranges.

Any radar bandwidth of less than 5 MHz will attenuate the SART signal slightly, so it is preferable to use a medium bandwidth to ensure optimum detection of the SART.

2-4

Figure 2-7 OTHER menu

Radar side lobes

2.4 RACON (Radar Beacon)

As the SART is approached, side lobes from the radar scanner may show the SART responses as a series of arcs or concentric rings. These can be removed by the use of the anti-clutter sea control although it may be operationally useful to observe the side lobes as they may be easier to detect in clutter conditions and also they will confirm that the SART is near to the ship.

Gain

For maximum range SART detection the normal gain setting for long range detection should be used, that is, with background noise speckle visible.

A/C SEA control

For optimum range SART detection, this control should be set to the minimum. Care should be exercised as wanted target in sea clutter may be obscured. Note also that in clutter conditions the first few dots of the SART response may not be detectable, irrespective of the setting of the anti-clutter sea control. In this case, the position of the SART may be estimated by measuring 9.5 nm miles from the furthest dot back towards own ship.

A racon is a radar transponder which emits a characteristic signal when triggered by a ship’s radar (usually only the 3 centimeter band). The signal may be emitted on the same frequency as that of the triggering radar, in which case it is superimposed on the ship's radar display automatically.

The racon signal appears on the PPI as a radial line originating at a point just beyond the position of the radar beacon or as a Morse code signal (figure below) displayed radially from just beyond the beacon.

Racon

Figure 2-9 Appearance of RACON signal

on the radar display

Some sets have automatic/manual anti-clutter sea control facilities in which case the operator should switch to manual.

A/C RAIN control

This should be used normally (to break up areas of rain) when trying to detect a SART response which, being a series of dots, is not affected by the action of the anti-clutter rain circuitry. Note that Racon responses, which are often in the form of a long flash, will be affected by the use of this control.

Some sets have automatic/manual anti-clutter rain control facilities in which case the operator should switch to manual.

Note: This SART information is excerpted from IMO SN/Circ 197 Operation of Marine Radar for SART Detection.

2-5

MAINTENANCE, TROUBLESHOOTING

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.

3.1 Periodic Maintenance Schedule

Periodic checks and maintenance are important for proper operation of any electronic systems. This chapter contains maintenance instructions to be followed to obtain optimum performance and the longest possible life of the equipment.

Table 3-1 Maintenance schedule

lavretnItniopkcehCserusaemdnakcehCskrameR

ylkeeWtinuyalpsiDforoiretxeehtnaelcyllacidoireP

.htolctfosyrdahtiwtinuyalpsid

elbaliavayllaicremmocfoesU

gnivah)yarps(renaelcTRC

.dednemmocersitceffecitatsitna

tcarttahcihws esuTONOD.tsud

tnevlosgnortss rorennihttniapekil

setaercTRCnotriddnatsuD

egrahccitatssecudorpneercsTRCA

.gninaelcrofsrenaelcevisarba

.ytivitisnesroopotralimissmotpmys

(Continued on next page)

3-1

Table 3-1 Maintenance schedule (con’t)

lavretnItniopkcehCserusaemdnakcehCskrameR

6ot3

shtnom

-ilauqrof(

-hcetdeif

snaicin

)ylno

shtnom6

enoot

raey

-ilauqrof(

-hcetdeif

snaicin

)ylno

nisgulp

rotaidar

rennacS

lanimreT

rennacstinu

dnaTRC

stundesopxE

nostlobdna

tinurennacs

.riaperrofllacneht

dnaspirts

gnidnuorrus

stnenopmoc

.stnenopmoc

gulpdnapirtslanimret

.noitaroiretedrofsrevoc

dnaTRCtaegatlovhgiH

denesoolrodedorrocrofkcehC

naelc,yrassecenfI.stlobdnastun

ecalpeR.ylkcihtmehttniaperdna

.dedorrocylivaehfimeht

noskcarcdnatridrofkcehC

dluohstridkcihT.ecafrusrotaidar

htolctfoshtiwffodepiweb

afi.retawhserfhtiwdenepmad

thgilsaylppa,dnuofsikcarc

rodnuopmocgnilaesfotnuoma

,ydemeryraropmetasaevisehda

kcehcotrevocrennacsnepO

kcehcoslA.edisnisnoitcennoc

annetnafoteksagrebbureht

tcarttastnenopmocgnidnuorrus

lliwhcihwtnemnorivnenitsud

aksA.noitalusniroopesuac

relaedroevitatneserperONURUF

egatlov-hgihlanretninaelcot

morfecirennacsnedoowaesu,tinu

.stiucriclanretni

gnisolcnehWrennacsnisrevoc

:naicinhcetecivresroF tatiaW

desuebyamdnuopmocgnilaeS

llamsaylppA.tniapfodaetsni

dnastunneewtebesaergfotnuoma

.erutufnilavomerysaerofstlob

)enoteca(tnevloscitsalpesutonoD

evomerotdeenuoyfI.gninaelcrof

.remmahdaehcitsalproremmah

retawesuacyamtinuehtnokcarC

otsegamadsuoiresgnisuac,ssergni

esoolhctacottonluferaceb,noitisop

.tinudnasrevocneewtebseriw

eriwropacrebburedonaTRCfI

.tiecalper,dekcarcsihtaehs

egatlovhgihlitnusetunim3tsael

VHdnaTRC(stnenopmoc

laudiserriehtegrahcsid)sroticapac

.mehtgnisseccaerofebsegrahc

lanimreT

,spirts

htrae,stekcos

lanimret

.cte,gnitaesreporp

.snoitcennocesoolrofkcehC rofsgulpdnastcatnockcehC

3.2 Life Expectancy of Major Parts

Table 3-2 Life expectancy of major parts

traPepyT.oNedoCycnatcepxeefiLepyTradaR

nortengaM)Wk06(F0425GM042-001-000sruoh000,3SD0671-RF nortengaM1425GM630-001-000sruoh000,30171-RF nortengaM6345GM267-041-000sruoh000,35271-RF

3-2

3.3 Fuse Replacement

3.5 Simple Troubleshooting

Various fuses are used to protect the equipment from overvoltage (overcurrent) or equipment fault. If the fuse blows find the cause before replacing. If the fuse blows again after replacement, request service.

CAUTION

Use the proper fuse.

Use of a wrong fuse can cause fire or equipment damage.

Table 3-3 Fuses

tinuyalpsiDA02

SD0671-RF

tinU

0171-RF 5271-RF

ylppuSrewoP

tinuyalpsiDA02

A2,A5

tinuCD

A01

CAV001 CAV022

This paragraph describes how to cure operational problems, which can be made by observing the radar picture and using operator controls and keys without opening the display unit, antenna unit or other equipment units.

The table below shows user-level troubleshooting procedures.

Table 3-5 Easy troubleshooting

melborPydemeR

roloC

nwooN

sraeppa

krampihsre

pihsnwo,oslA.)]6[,]6[

.sliated

erutcipoN.esiwkcolclortnocLLIRBehtnruT

.neercsehtssuaged

lamronba

siNOKRAMS'PIHStahtkcehC

unemENIL/KRAMehttadetceles

]0[,]0[,]UNEM[:ecneuqesgniyek(

).cte,htdiw,htgnel(noitamrofni

laitininideretneneebevahdluohs

ONURUFatlusnoC.sgnittes

rofrelaedroevitatneserper

otlortnocyratorLBEehthsuP

3.4 Replacement of Batteries

The GYRO CONVERTER Board (option) has a battery. The battery for the RP Board preserves data when the power is turned off, and its life is about five years. When the battery voltage is low, NG (No Good) appears at the diagnostic test for the RP board. When this happens, contact your dealer to request replacement of the battery.

Table 3-4 Battery replacement information

draoB

emaN

draoBPRS3RE957-721-000 draoBCGL.82/1RC967-301-000

yrettaB

epyT

edoC

rebmuN

atadvanoN.ecivednoitagivannonruT

3-3

3.6 Advanced-level Troubleshooting

This paragraph describes how to cure hardware and software troubles which should be carried out by qualified service personnel.

Note: This radar equipment contains complex modules in which fault diagnosis and repair down to component level are not practicable by users.

Serviceman qualification

All adjustments of radio transmitter during or coinciding with the installation, servicing, or maintenance which may affect the proper operation must be performed by or under the immediate supervision and responsibility of a person holding an operator certificate containing a ship radar endorsement.

This is what the U.S. Codes of Federal Regulations part 80.169 implies (not exact extract). As such, every administration sets forth its own rule; service personnel must be aware of this

kind of competency requirements.

Service call

When making a service call to your service agent, check S/N and symptom beforehand.

3-4

Table 3-6 Advanced-level troubleshooting

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C/AhtiwlortnocNIAGtsujdA

.muminimtateslortnocAES

raeppasdnegeldnaskraM

.ohceroesionontub

esiondnasdnegel,skraM

.ohceontubraeppa

,kaelnoissimsnarT(

pihsnwognitneserper

).tnesbasi,noitisop

detadputonerutciProtareneGlangiSgniraeB.1

fonoitatneirotcerrocnI

erutcip

esuacelbaborp

reifilpmaFI.1

nortengaM.1

draoBrotaludoM.2

draoBUPS.3

(draoBrennacs)tinu

draoBUPS.2

pukcoloediV.3

draoBUPS.1

ecafretnIoryG.2

ydemeR

.reifilpmaFIecalpeR.1

neewtebelbaclangiS.2

yalpsiddnaannetna

).retemmhoyb

draoBreifilpmAoediV.3

.draoBUPSecalper

.draoBUPSecalpeR.3

.elbac

.draoBUPSecalpeR.2

.radarnodnaffonruT.3

GISDH"egassemehT.1

.yb-dnatsgnirud

.ecafretniorygecalpeR.2

fonoitalosidnaytiunitnockcehC.2

tcennocsiD:etoN(.elbaclaixaoc

fosdnehtobtasguldnagulpeht

tignikcehcerofebelbaclaixaoc

erucesrofenilxaocoedivkcehC.3

,doogsinoitcennocfI.noitcennoc

.tnerrucnortengamkcehC.1

.draoBrotaludoMecalpeR.2

langisfonoitcennocehtkcehC.1

ehtnehwsraeppa"GNISSIM

deviecertonsieslupgnidaeh

detsujdayllaunamgninuT

ytivitisnesrooptub

CIMdenuteD.2

.NO

radartubdegnahcegnaR

egnahctonseoderutcip

draoBUPS.2

draoBrehtoM.3

pukcoloediV.4

nortengamdetaroireteD.1

nortengamkcehc,egnar

ebyamnortengam,eulav

.denuteb

ecafrotaidarnotriD.3

sinoitcejerecartdnoceS.4

yekEGNARevitcefeD.1

.deriuqereb

.ecafrusrotaidarnaelC.3

.draoBUPSecalpeR.2

.draoBrehtoMecalpeR.3

.radarnodnaffonruT.4

mn84nognittimsnartradarhtiW.1

lamronwolebsitnerrucfI.tnerruc

.nortengamecalpeR.evitcefed

tifI.tnerrucgnitcetedCIMkcehC.2

yamCIM,eulavlamronwolebsi

tsumCIM.denutedemocebevah

rotcejerecart-dnocesehtelbasiD.4

.33.1hpargarapotgnirrefer

EGNAR]-[dna]+[tihotyrT.1

-sseccusnufI.semitlarevessyek

yamdapyekfotnemecalper,luf

3-5

Table 3-7 Advanced-level troubleshooting (con’t)

melborPdnatniopkcehC

rotcejerecnerefretnI

ecnerefretni(elbareponi

)deyalpsidtonlevelnoitcejer

evitceffenihctertsohcE

si"2SE"ron"1SE"rehtieN(

).deyalpsid

senilxednilellarap2ylnO

)detnawsenil6(

tonerasgniregnaR

.deyalpsid

egnartanoitanimircsidrooPtonlortnocrettulcaeS.1

tonnoitatneserpnoitomeurT

.yltcerrocgnikrow

.1foecnaillirbehttsujdA

esuacelbaborp

draoBUPS.1

draoBrehtoM.2

draoBUPS.1.draoBUPSecalpeR.1

lavretnienil

draoBUPS.2

.yek

ydemeR

.draoBUPSecalpeR.1

.draoBrehtoMecalpeR.2

xednifognittestcerrocnI.1

.72.1hpargarap

ehthtiwsgniregnar

.desaercnisiytisnetni

.ylreporpgninoitcnuf

EDOMfotcatnocrooP.1

.desseccatonsinoitceleS.2

.tcerrocnisiyrtnedeepS.3

etaruccaniyalpsidMT.4

.lufsseccusnu

.draoBUPSecalpeR.2

foycneuqerfetaruccani

.rotallicsolatsyrc

.redrah

.sraeppa

.etaruccaerastupni

otgnirreferlavretnienilxedniteS.1

fidraobtiucricdetaicossaecalpeR.1

AESC/AfognittesreporpmI.1

ylnoneessiAESC/AfI.lortnoc

tcepsus,egnaresolcyrevta

elttilayekEDOMsserpotyrT.1

"MT"litnuyekEDOMsserP.2

deepspihsnwotcerrocretnE.3

.21.1hpargarapotgnirrefer

ssapmocdnadeepstahterusekaM.4

yltcerrocdekcarttontegraTnistegratfonoitinifedrooP.1

NIARC/AdnaAESC/AtsujdA.1

rettulcaes

.51.1dna41.1

shpargarapotgnirreferslortnoc

3-6

3.7 Diagnostic Test

A diagnostic test program is provided to enable testing of major circuit boards in the radar display unit. Note that the normal radar picture is lost during this test.

Proceed as follows to execute the diagnostic test:

1. Press the MENU key to shown the main menu.

2. Press the [0] key four times to select the OTHER sub menu.

3. Press the [2] key to select TEST.

[MENU] key

1. VIDEO PLOT

2. TGT TRAIL

3. TGT ALARM

4. PANEL DIM

5. ECHO SIG

6. FUNC

7. PLOT

8. MARK

9. BRILL

0. OTHER

[0] key TWICE

Program numbers appear. The diagnostic test is executed and the screen shows test results as shown on the next page. OKs appear for normal operation. ARP results appear only when optional ARP Board is mounted. If NG (No Good) appears, corresponding components may be defective. Consult your dealer.

5. Small squares and circles displayed on the test results screen are for testing the keys and controls. As you operate the keys, corresponding squares are highlighted, indicating that your control/key operations are properly recognized.

6. Press the [ENTER/SELECT] key to check the display circuit. See page 3-9.

7. T o terminate the diagnostic test, press the [MENU] key.

OTHER

1. HDG SET

2. SPD MODE MAN LOG NAV

3. MAN SPD

4. DRIFT SET

5. DISPLAY

6. MARK/LINE

7. TUNE

8. NAV DATA

9. EBL/VRM

0. ↓

[0] key TWICE

OTHER

1. ↑

2. TEST

3. DEGAUSS

4. TIME ALARM

5. RANGE

6. INSTALL

[2] key TWICE to start test

Figure 3-1 Sequence for diagnostic test

3-7

Control Check Bar length increases with clockwise rotation; decreases with counterclockwise rotation.

FR-1700 Series TEST

1. Program No. 03591511**

2. ROM Check OK

3. RAM Check OK

4. Antenna Rotation 24rpm

5. Tx Trigger Frequency 3000Hz

6. Video Level 000

7. Video Signal OK

8. Navigation I/O 1 OK

9. Navigation I/O 2 OK

10. NMEA Heading IN OK

11. LOG Pulse IN OK

ARP Test

1. Program No. 18590411** 18590421**

2. ROM Check OK OK

3. RAM Check OK

4. Speed Log OK 0.0 KT

5. Course OK

6. Trigger OK

7. Video Signal OK

8. Bearing Pulse OK

9. Heading Pulse OK

10. Minimum Hit 0003

11. Scan Time 0274

12. Manual Acq. 00

13. Auto Acq. 00

14. FE-Data 1 0000

15. FE-Data 2 0000

Press MENU key to escape. Press ENTER key to check CRT.

000

ROM Test RAM Test

** Program No.

Press MENU key to return to radar picture.

Press ENTER/SELECT key to go picture check facility.

EBL Control Confirmation (Figure increments upward with clockwise rotation; downward with counterclockwise rotation.)

Figure 3-2 Test results screen

P U R P L E

Test pattern

X:000 Y:000

Trackball Confirmation Figure increments upward with up, right rotation; downward with down, left rotation.

VRM Control Confirmation (Figure increments upward with clockwise rotation; downward with counterclockwise rotation.)

3-8

Select item with tenkey and adjust by VRM knob.

CRT ADJUSTMENT

1. ↑

2. H SIZE

3. H POSITION

4. V SIZE

5. V POSITION

6. PINCUSHION

7. BRIGHTNESS

Figure 3-3 Display circuit test

3-9

PARTS LOCATION

Cooling Fan 0615-24M

ATA Board ARP-17 (option) 18P9004A

Figure 4-1 Display unit, right side view

Cooling Fan MMS-06C24DS-R01

DANGER

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

RP Board RP-17 (option) 03P9259A

DANGER

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

FR-1710: HV Board 03P9017A FR-1725: HV Board 03P9017B

FR-1710/1725: DC-PTU Board 03P9223A

AC-PTU Board 03P9228A/B

FR-1760DS: DC-PTU Board 03P9223B

Figure 4-2 Display unit,

left side view

4-1

CRT

Figure 4-3 Display unit, top view

SPU Board 03P9230

4-2

GYRO CONVERTER Board (option) 64P1106A

Figure 4-4 Display unit, top view

FR-1760DS Scanner Unit

MIC (ATT Board ATT-7362 behind MIC)

IF AMP 03P6570 (MBS Board 03P6569 behind IF AMP)

J910, P910

J601, P601

STB-2

STB-3

STB-1

RTB Board

[C] 03P6666

RELAY Board

[A] 03P9004

Figure 4-5 Scanner unit, left side view

J829 R811 R812

RF section

MD Board 03P6668

Magnetron MG5240F

CR808

CR809

Figure 4-6 Scanner unit, right side view

Pulse transformer T801

4-3

FR-1760DS Scanner Unit (con’t)

PULSE GENERATOR

Board [A] MP-3795

Scanner motor

B801

Figure 4-7 Scanner unit, right side view, RF section removed

J821

Choke coil L801

Fan motor B802

Magnetron MG5240F

MAG HTR DET Board [A] 03P6827

Pulse transformer T801

CR815

Relay K801 K802 K803

PFN Board

[C]03P6669

CR814

CR813

MD Board 03P6668

Figure 4-8 RF section, rear view

4-4

FR-1760DS Power Supply Unit

TX HV Board (2) 03P6810

Transmitter section

TX HV Board (1) 03P6810

Transformer T804

Check meter

Switch S801

Hour meter

Fuse 801

Fuse 802

Fuse 803

POWER Board 03P6810

Fan motor B801

RELAY Board [A] 03P9003

R813 Terminal board

PTB-2

Terminal board PTB-1

Figure 4-9 FR-1760DS Power supply unit

4-5

FR-1710/1725 Scanner Unit

RF Module

IF Board 03P9232

S901

MP-3795 Board

TB Board 03P9242

Motor

Bow Side

MIC Assy.

RU-9253 (For RTR-063) RU-9371 (For RTR-062A)

Diode Limitter RU-9099

RFC Board 03P9243

4-6

**KW

RTR-06*

RF module (Upper part)

MD Board 03P9244

Fan motor assy. 03-1900

J811

J812

Module (Lower part)

Pulse Transformer RT-9025 (For RTR-062A) RT-9023 (For RTR-063)

Magnetron E3566 (For RTR-062A) MG5436 (For RTR-063)

4-7

SPECIFICATIONS OF MARINE RADAR

FR-1710/1725/1760DS

1. ANTENNA RADIATORS

(1) Type Slotted waveguide array (2) Polarization Horizontal (3) Rotation 24 rpm or 42 rpm (FR-1760DS: 24 rpm only) (4) Radiator length 4 ft (XN12AF), 6.5 ft (XN20AF), 8 ft (XN24AF)

8.1 ft (SN4A), 9 ft (SN5A)

(5) Horizontal Beamwidth

-3 dB: 1.8° (XN12AF), 1.23° (XN20AF), 0.95° (XN24AF)

2.68° (SN4A), 1.23° (SN5A)

-20 dB: 3.1° (XN12AF), 3.1° (XN20AF), 2.5° (XN24AF) (6) Vertical Beamwidth 20° (7) Sidelobe attenuation

XN12AF: -24 dB (within ±10° of main-lobe)

-30 dB (outside ±10° of main-lobe)

XN20AF/XN24AF: -24 dB (within ±20° of main-lobe)

-30 dB (outside ±20° of main-lobe)

SN4A: -23 dB (within ±20° of main-lobe)

-25 dB (outside ±20° of main-lobe)

SN5A: -20 dB (within ±20° of main-lobe)

-25 dB (outside ±20° of main-lobe) (8) Antenna Gain XN12AF: 27.5 dB, XN20AF: 30.0 dB, XN24AF: 31.5 dB

SN4A: 26.0 dB, SN5A: 26.4 dB

(9) Wind Speed 51.5 m/s relative

2. RF TRANSCEIVER

(1) Frequency FR-1710/1725: 9410 MHz ±30 MHz

FR-1760DS: 3050 MHz ±30 MHz

(2) Output Power FR-1710: 10 kW, FR-1725: 25 kW, FR-1760DS: 60 kW (3) Spurious Response -40 dB or less (4) IF Amplifier 60 MHz, Logarithmic (5) Bandwidth

FR-1710/1725: Short 1/2, Middle 1 pulse: 27 MHz Middle 2/3, Long pulse: 3 MHz FR-1760DS: Short pulse: 27 MHz Middle 1/2, Long pulse: 3 MHz

SP - 1

(6) Range, Pulselength (PL) & Pulse Repetition Rate (PRR)

FR-1710/1725:

Range (nm)

PL PRR (Hz) 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 72 96 S1P 3000 0.07 µs S2P 3000 0.15 µs M1P 1500 0.3 µs M2P 1000 0.5 µs M3P 1000 0.7 µs LP 600 1.2 µs

*: Second echo trace mode PRR; 500 Hz Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm FR-1760DS:

Range (nm)

PL PRR (Hz) 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 72 96 120 SP 1900 0.08 µs M1P 1100 0.3 µs M2P 600 0.6 µs LP 600

*: 450 Hz on 120 nm range

1.2 µs

(7) Duplexer Ferrite circulator with diode limiter (8) Noise figure FR-1710/1725: 6 dB, FR-1760DS: 4dB

3. RADAR DISPLAY

(1) Picture tube 17" color CRT, Effective display diameter: 225 mm

Yellow or green echoes in 16 levels

(2) Scanning Raster scan at scanning frequency 48.3 kHz horizontal, 60 Hz vertical.

Number of scanning lines 768, non-interlaced.

(3) Range scales and ring intervals

Range(nm) 0.125 0.25 0.5 0.75 1.5 3 6 12 24 48 72 96 120 Ring interval(nm) 0.025 0.05 0.1 0.25 0.25 0.5 1 2 4 8 12 16 20 No. of Rings 5 5 5 3 6 6 6 6 6 6 6 6 6

Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm, FR-1760DS: 120 nm

(4) Range discrimination 34 m on 1.5 nm range (5) Bearing discrimination XN12AF: 2.03°, XN20AF: 1.46°, XN24AF: 1.18°

SN4A: 2.83°, SN5A: 2.53°

(6) Minimum range 28 m

SP - 2

(7) Bearing accuracy ±1° (8) Range accuracy 1% of range in use or 8 m whichever is the greater (9) Presentation modes Head-up, Head-up TB, North-up, Course-up, True motion north-up

(Gyro signal required except for HU)

(10) Variable Range Markers Two Variable Range Markers, switchable (11) Electronic Bearing Lines Two Electronic Bearing Lines, switchable (12) Offcenter Sweep origin can be offcentered by 75% of range in use in any direction

(Not available for maximum range)

4. POWER SUPPLY

(1) DC Source

FR-1710/1725: 24 rpm: 24/32 VDC: 8.5/6.4 A, 42 rpm: 24/32 VDC: 8.8/6.6 A FR-1760DS: 24 VDC: 5.6 A

(2) AC Source

FR-1710: 100-115/200-230 VAC, 1 phase, 50-60 Hz

2.3 A (24 rpm), 3.2 A (42 rpm)

FR-1725: 100-115/200-230 VAC, 1 phase, 50-60 Hz

3.2 A (24 rpm), 3.3 A (42 rpm)

FR-1760DS: Display unit: 24 VDC: 5.6 A Antenna power supply unit:100-115 VAC: 3.0 A, 1 phase, 50-60 Hz 220/240 VAC, 1 phase, 50-60 Hz (optional rectifier required)

5. DIMENSION AND MASS

See Outline Drawing

6. ENVIRONMENTAL CONDITIONS

(1) Ambient temperature (Complies with IEC 945)

Display unit: -15 to + 55°C

Antenna unit : -25 to + 70°C (2) Relative humidity 95% at 40°C (3) Water proofing Display unit (panel): IEC60529 IPX2, Antenna unit: IEC60529 IPX6 (4) Vibration ±1 mm ±10%, 2(5) to 13.2 Hz,

Maximum acceleration 7 m/s2, 13.2 to 100 Hz

(5) Category of Equipment Units

Display unit: To be installed in a protected area Antenna power supply unit To be installed in a protected area Antenna unit: To be installed in an exposed area

SP - 3

Performance Monitor: To be installed in an exposed area

7. COATING COLOR

(1) Display Unit Panel: N3.0, Chassis: 2.5GY5/1.5 (2) Antenna Unit N9.5

8. COMPASS SAFE DISTANCE

(1) Display unit Standard: 1.15 m Steering: 0.90 m (2) Antenna unit

FR-1710: Standard: 1.65 m Steering: 1.25 m FR-1725: Standard: 2.15 m Steering: 1.60 m FR-1760DS: Standard: 4.40 m Steering: 3.30 m

(3) Antenna power supply unit Standard: 1.20 m Steering: 0.90 m

SP - 4

INDEX

A/C AUTO control 1-12 A/C RAIN control 1-13 A/C SEA control 1-12 ACQ key 1-20 A/D converter curve setting 1-35 Alarms 1-36 AUDIO OFF key 1-22

Background color 1-34 Battery replacement 3-3 Bearing measurement 1-14 Bearing scale format 1-34 BRILL control 1-3 Brilliance

screen 1-3 screen data 1-30

Clutter sweep 1-33 Compass readout adjustment 1-4

GAIN control 1-12 GZ ALARM key 1-17

Heading line 1-27 Heading marker 1-27 HM OFF control (GAIN control) 1-27

INDEX LINE key 1-26 Interference rejector 1-13

Maintenance schedule 3-1 Major parts life expectancy 3-2 MARK key 1-26 Menu tree viii MODE key 1-6 Multiple echoes 2-2

DEGAUSS control 1-4 Degaussing interval 1-32 Diagnostic test 3-7

EBL OFF key 1-14 EBL OFFSET key 1-15 EBL ON key 1-14 Echo averaging 1-19 ECHO control 1-10 Echo stretch 1-10 Electronic Plotting Aid (EPA) 1-20–1-23

CPA/TCPA ranges 1-22 past plot points 1-23 plotting a target 1-20 silencing audio alarm 1-22 target data 1-21 terminating plotting 1-21 true, relative vector 1-21

vector time 1-21 Enhanced video 1-31 Enlarging close-in targets 1-35

Navigation data 1-32 Noise rejector 1-31 North marker 1-27

Offcentering 1-17 Origin marks 1-26

Panel backlighting 1-3 Parallel index lines 1-26 POWER switch 1-1 Performance monitor 1-37 Presentation modes 1-6 Pulselength 1-10

RACON 2-5 RANGE key 1-8 Range measurement 1-14 Range scale 1-8 Range scale preset 1-34 RINGS key 1-14

False echoes 2-2–2-3 Function keys 1-28 Fuse replacement 3-3

SART (Search and Rescue Transponder) 2-3 Second-trace echoes 1-30 Shadow sector 2-3 SHIFT key 1-17

Index-1

Sidelobe echoes 2-2 Speed input 1-9 STBY/TX key 1-1 Stern marker 1-27 System configuration vi

Target alarm

acknowledging alarm 1-17

deactivating 1-17

inward, outward alarms 1-17

setting 1-16 Target position output 1-33 Target trails

afterglow 1-25

displaying, erasing target trails 1-24

restoring trails 1-24

target gradation 1-24

thin trails 1-25

trail brilliance 1-25

trail time 1-24

true, relative trails 1-23 Time alarm 1-31 Troubleshooting

advanced 3-4

simple 3-3 Tuning 1-3

User keys (F1, F2, F3) 1-28

Video contrast 1-33 Virtual image 2-3 VRM OFF key 1-14 VRM ON key 1-14

Zoom 1-27 ZOOM key 1-27

Index-2

Furuno FR-1710 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

INTRODUCTION

A Word to the Owner of This FURUNO Radar

Features

SYSTEM CONFIGURATION

MENU TREE

OPERATIONAL OVERVIEW

1.1 Turning on the Power

1.2 T ransmitter ON

1.3 Control Description

1.4 CRT Brilliance

1.6 Tuning the Receiver

1.5 Control Panel Backlighting

1.8 Initializing the Compass Readout

1.7 Degaussing the Screen

1.9 On-screen Legends and Markers

1.10 Presentation Modes

1.11 Selecting the Range Scale

1.13 Pulselength, Echo Stretch

1.14 Adjusting the Sensitivity

1.15 Suppressing Sea Clutter

1.16 Suppressing Precipitation Clutter

1.17 Interference Rejector

1.18 Measuring the Range

1.19 Measuring Bearing

1.20 Collision Assessment by the Offset EBL

1.21 Measuring Range and Bearing Between Two Targets

1.22 Setting a Target Alarm Zone

1.23 Off-centering (shift)

1.24 Echo Averaging

1.25 Electronic Plotting Aid (EPA)

1.26 Target Trails (Echo Trails)

1.27 Parallel Index Lines

1.28 Origin Mark

1.29 Zoom

1.30 Markers

1.31 User Keys (F1, F2, F3)

1.32 Function Keys

1.35 Noise Rejector

1.36 Time Alarm

1.37 Enhanced Video

1.39 Navigation Data

1.38 Degaussing Interval

1.40 Video Contrast

1.41 Clutter Sweep

1.42 Outputting Target Position

1.43 Background Color

1.44 Selecting Range Scales

1.47 Enlarging Close-in Targets

1.48 Alarms

1.49 Peformance Monitor

RADAR OBSERVATION

2.1 General

2.2 False Echoes

2.3 SART (Search and Rescue T ransponder)

2.4 RACON (Radar Beacon)

MAINTENANCE, TROUBLESHOOTING

3.1 Periodic Maintenance Schedule

3.2 Life Expectancy of Major Parts

3.3 Fuse Replacement

3.5 Simple Troubleshooting

3.4 Replacement of Batteries

3.6 Advanced-level Troubleshooting

3.7 Diagnostic Test

PARTS LOCATION

FR-1760DS Scanner Unit

FR-1760DS Power Supply Unit

FR-1710/1725 Scanner Unit

INDEX