Furuno FA, FAR-2827, FAR-2127, FAR-2817, FAR-2117 User Manual

MARINE RADAR/ARPA

FAR-28x7 Series

FAR-21x7(-BB) Series

Your Local Agent/DealerYour Local Agent/Dealer

9-52 Ashihara-cho,9-52 Ashihara-cho,
Nishinomiya 662-8580, JAPANNishinomiya 662-8580, JAPAN

Telephone :Telephone : [phone]-65-2111
FaxFa

x

0798-65-42000798-65-4200

::

IRST EDITION :

IRST EDITION : JANJAN.. 20042004

Printed in JapanPrinted in Japan

A

ll rights reserved.

A

ll rights reserved.

CC ::AUGAUG.. 25, 200425, 2004

Pub. No.Pub. No. OME-35190OME-35190

*00014745202**00014745202*

*00014745202**00014745202*

(( DAMIDAMI ))

FAR-2107/2807 SER.FAR-2107/2807 SER.

* 0 0 0 1 4 7 4 5 2 0 2 ** 0 0 0 1 4 7 4 5 2 0 2 *

*OME35190C00**OME35190C00*

*OME35190C00**OME35190C00*

* O M E 3 5 1 9 0 C 0 0 ** O M E 3 5 1 9 0 C 0 0 *

i

SAFETY INSTRUCTIONS

WARNING

WARNING

Radio Frequency Radiation Hazard

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

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

2

exist are given in the table

below.
Note: If the antenna unit is installed at a close distance in front of the wheel house,

your administration may require halt of transmission within a certain sector of antenna
revolution. This is possible. Ask your FURUNO representative or dealer to provide
this feature.

FAR-2827/2127 RTR-079 MG5436 XN12AF 0.80 m 11.20 m
FAR-2827/2127 RTR-079 MG5436 XN20AF 0.40 m 8.60 m
FAR-2827/2127 RTR-079 MG5436 XN24AF 0.20 m 5.80 m
FAR-2817/2117 RTR-078 MG40102 XN12AF 0.30 m 4.20 m
FAR-2817/2117 RTR-078 MG4010

2

XN20AF 0.10 m 3.00 m

FAR-2817/2117 RTR-078 MG4010

2

XN24AF -- 2.40 m
FAR-2137S RTR-080 MG5223F SN30AF
FAR-2137S RTR-080 MG5223F SN36AF
FAR-2827W RTR-081 MG5436 XN20AF
FAR-2827W RTR-081 MG5436 XN24AF
FAR-2837S RTR-080 MG5223F SN30AF
FAR-2837S RTR-080 MG5223F SN36AF
FAR-2837SW RTR-082 MG5223F SN30AF
FAR-2837SW RTR-082 MG5223F SN36AF

Distance to
100 W/m

2

point

Distance to
10 W/m

2

point

Model

3

TR unit Magnetron Antenna

1

1

XN12AF: 4 ft XN20AF: 6.5 ft XN24AF: 8 ft

SN30AF: 10 ft SN36AF: 12 ft

2

Or MAF1425B

3

FAR-2117/2127/2137S available in blackbox configuration.

SAFETY INSTRUCTIONS

ii

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
antenna unit. Post a warn­ing sign near the switch
indicating it should not be
turned on while the antenna
unit is being serviced.

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

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

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

Do not disassemble or modify the
equipment.

Fire, electrical shock or serious injury can
result.

Immediately turn off the power at the
ship's mains switchboard if water
leaks into the equipment or the equip­ment is emitting smoke or fire.

Continued use can cause fatal damage to
the equipment.

WARNING

Use the proper fuse.

Use of a wrong fuse can result in damage
to the equipment or cause fire.

Keep heater away from equipment.

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

Do not place liquid-filled containers
near 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.

Before servicing the radar, turn off
the appropriate external breaker.

Power is not removed from the radar simply
by turning off its power switch.

SAFETY INSTRUCTIONS

iii

WARNING

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

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

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

CAUTION

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

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

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

The data generated by ARP, AIS and
video plotter are intended for
reference only.

Refer to official nautical charts for
detailed and up-to-date information.

SAFETY INSTRUCTIONS

i

v

WARNING

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

WARNING LABEL
Warning labels are attached to the
equipment. Do not remove any label.
If a label is missing or damaged,
contact a FURUNO agent or dealer
about replacement.

WARNING

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

DISPLAY UNIT, PROCESSOR UNIT

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

ANTENNA UNIT

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

v

TABLE OF CONTENTS

FOREWORD ........................................................................................................xi

PROGRAM NUMBER ........................................................................................ xiii

SYSTEM CONFIGURATION..............................................................................xiv

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

1

RADAR OPERATION....................................................................................1-1

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

1.2 Transm i tter ON..........................................................................................................1-1

1.3 Control Unit................................................................................................................ 1-3

1.4 Main Menu.................................................................................................................1-5

1.5 Operation Using the On-Screen Boxes......................................................................1-7

1.6 Cursor Menu............................................................................................................1-10

1.7 Monitor Brilliance..................................................................................................... 1-11

1.8 Choosing the Display Mode.....................................................................................1-12

1.9 On-Screen Boxes and Markers................................................................................1-13

1.10 Tuning the Receiver.................................................................................................1-15

1.10.1 Choosing the tuning method..........................................................................1-15

1.10.2 Initializing tuning............................................................................................1-15

1.10.3 Automatic tuning............................................................................................1-16

1.10.4 Manual tuning................................................................................................1-16

1.11 Aligning Heading with Gyrocompass........................................................................1-17

1.12 Presentation Modes.................................................................................................1-18

1.12.1 Choosing presentation mode.........................................................................1-18

1.12.2 Description of presenta tio n mo des................................................................1-19

1.13 Entering Own Ship's Speed .....................................................................................1-22

1.13.1 Automatic speed input by log or GPS navigator ............................................1-22

1.13.2 Manual speed input.......................................................................................1-23

1.14 Choosing the Range Scale......................................................................................1-24

1.15 Choosing the Pulselength........................................................................................1-25

1.15.1 Choosing pulselength ....................................................................................1-25

1.15.2 Choosing pulselength ....................................................................................1-26

1.16 Adjusting the Sensitivity...........................................................................................1-27

1.17 Suppressing Sea Clutter..........................................................................................1-28

1.17.1 Choosing method of adjustme nt....................................................................1-28

1.17.2 Automatic adjustment by the A/C SEA control...............................................1-28

1.17.3 Manual adjustment o f A/C SEA.....................................................................1-29

1.18 Suppressing Rain Clutter.........................................................................................1-30

1.18.1 Turning AUTO RAIN on or off........................................................................1-30

1.18.2 Adjusting A/C RAIN.......................................................................................1-31

1.19 Interference Rejector...............................................................................................1-32

1.20 Measur i ng th e Rang e ...............................................................................................1-34

1.20.1 Turning range rings on/off..............................................................................1-34

1.20.2 Measuring range by the variable range marker (VRM)..................................1-35

1.21 Measur i ng th e Beari n g.............................................................................................1-37

1.21.1 Measuring the bearing...................................................................................1-37

TABLE OF CONTENTS

vi

1.21.2 Choosing true or relative bearing.................................................................. 1-39

1.22 Collision Ass essm e nt by O f fset EBL........................................................................ 1-40

1.22.1 Ho w to assess risk of collision by the offset EBL........................................... 1 -40

1.22.2 Choosing point of referenc e for ori gin point of offset EBL ..............................1-41

1.23 Measuring Range and Bearing Between Two Targets............................................. 1-42

1.24 Setting a Target Alarm............................................................................................. 1-43

1.24.1 How to set a target alarm zone ..................................................................... 1-43

1.24.2 Acknowledging the target alarm.................................................................... 1-44

1.24.3 Deactivating a target alarm........................................................................... 1-44

1.24.4 Target alarm attributes.................................................................................. 1-45

1.25 Off-Centering the Display........................................................................................ 1-46

1.26 Echo Stretch............................................................................................................ 1-47

1.27 Echo Aver aging....................................................................................................... 1-48

1.28 Target Trails.............................................................................................................1-49

1.28.1 True or relative trails..................................................................................... 1-49

1.28.2 Trail time ....................................................................................................... 1-50

1.28.3 Trail gradation............................................................................................... 1-50

1.28.4 Resetting target trails.................................................................................... 1-51

1.28.5 Trail copy...................................................................................................... 1-51

1.28.6 Trail level...................................................................................................... 1-52

1.28.7 Narrow trails................................................................................................. 1-52

1.28.8 Canceling trails............................................................................................. 1-52

1.29 Parallel Index Lines................................................................................................. 1-53

1.29.1 Displaying, erasing parallel index lines.......................................................... 1-53

1.29.2 Adjusting index line orientation, index line interval........................................ 1-54

1.29.3 Index line bearing reference.......................................................................... 1-54

1.29.4 Choosing maximum number of index lines to display.................................... 1-55

1.29.5 Index line mode............................................................................................ 1-55

1.30 Origin Mark.............................................................................................................. 1-56

1.30.1 Entering origin marks.................................................................................... 1-56

1.30.2 Origin mark stabilization................................................................................ 1-58

1.30.3 Deleting individual origin marks..................................................................... 1-58

1.31 Zoom....................................................................................................................... 1-59

1.32 Markers................................................................................................................... 1-60

1.32.1 Heading marker and heading line................................................................. 1-60

1.32.2 Stern marker................................................................................................. 1-60

1.32.3 North marker................................................................................................. 1-60

1.32.4 Own ship symbol .......................................................................................... 1-61

1.33 Automatic Picture Setup According to Navigation Purpose...................................... 1-62

1.33.1 Choosing a picture setup option.................................................................... 1-63

1.33.2 Restoring default picture setup options......................................................... 1-64

1.33.3 User-programmable picture setups............................................................... 1-65

1.34 Programming Function Keys................................................................................... 1-67

1.34.1 Activating a function key............................................................................... 1-67

1.34.2 Programming the functi ons keys................................................................... 1-67

1.35 Ship’s Position......................................................................................................... 1-71

1.36 Noise Rejector......................................................................................................... 1-72

1.37 Suppressing Second-trace Echoes ......................................................................... 1-73

TABLE OF CONTENTS

vii

1.38 Adjusting Brilliance of Screen Data........................................................................... 1-74

1.39 Watch Alarm.............................................................................................................. 1-75

1.40 Setting Up Nav Data.................................................................................................. 1-76

1.41 Text Window Setup.................................................................................................... 1-78

1.42 Customizing Operation.............................................................................................. 1-80

1.43 Alarms ....................................................................................................................... 1-82

1.43.1 Alarm description............................................................................................ 1-82

1.43.2 Outputting alarm signal................................................................................... 1-84

1.44 Choosing the Antenna, Displaying Antenna Information........................................... 1-85

1.44.1 Choosing the antenna..................................................................................... 1-85

1.44.2 Displaying antenna information ...................................................................... 1-86

1.45 Cursor Data............................................................................................................... 1-87

1.46 Performance Monitor................................................................................................. 1-88

1.46.1 Activating, deactivating the performance monitor........................................... 1-88

1.46.2 Checking radar performance.......................................................................... 1-88

1.47 Wiper......................................................................................................................... 1-90

1.48 Own Ship Symbol...................................................................................................... 1-91

1.49 Color and Brilliance Sets........................................................................................... 1-92

1.49.1 Choosing color and brilliance set.................................................................... 1-92

1.49.2 Presetting color and brilliance set................................................................... 1-92

1.50 Reference Point for CPA/TCPA................................................................................. 1-94

1.51 Switching Hub HB-100 (option)................................................................................. 1-95

2 RADAR OBSERVATION ...............................................................................2-1

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

2.1.1 Minimum and maximum ranges........................................................................ 2-1

2.2 False Echoes............................................................................................................... 2-3

2.3 SART (Search and Rescue Transponder)................................................................... 2-5

2.3.1 SART description.............................................................................................. 2-5

2.3.2 Showing SART marks on the radar display...................................................... 2-6

2.3.3 General remarks on receiving SART................................................................ 2-7

2.4 RACON ....................................................................................................................... 2-8

3 ARP OPERATION.........................................................................................3-1

3.1 Usage Precautions...................................................................................................... 3-1

3.2 Controls for ARP.......................................................................................................... 3-2

3.3 Activating, Deactivating ARP....................................................................................... 3-3

3.4 Entering Own Ship's Speed......................................................................................... 3-3

3.4.1 Echo-referenced speed input............................................................................ 3-3

3.5 Automatic Acquisition .................................................................................................. 3-5

3.5.1 Enabling auto acquisition.................................................................................. 3-5

3.5.2 Terminating tracking of targets (including reference targets)............................ 3-6

3.6 Manual Acquisition ...................................................................................................... 3-7

3.6.1 Setting manual acquisition conditions............................................................... 3-7

3.6.2 Manually acquiring a target............................................................................... 3-7

3.7 ARP Symbols and ARP Symbol Attributes.................................................................. 3-9

3.7.1 ARP symbols .................................................................................................... 3-9

3.7.2 ARP symbol brilliance..................................................................................... 3-10

3.7.3 ARP symbol color and size..............................................................................3-11

TABLE OF CONTENTS

viii

3.8 Displaying Target Data ............................................................................................ 3-12

3.8.1 Displaying individual target data.................................................................... 3-12

3.8.2 Target list ...................................................................................................... 3-14

3.9 Vector Modes .......................................................................................................... 3-16

3.9.1 Description of vectors ................................................................................... 3-16

3.9.2 Vector motion and length .............................................................................. 3-17

3.10 Past Position Display............................................................................................... 3-18

3.10.1 Displaying and erasing past position points, choosing past position

plot interval ................................................................................................... 3-18

3.10.2 Past position display attributes...................................................................... 3-19

3.11 Set and Drift ............................................................................................................ 3-20

3.12 Setting CPA/TCPA Alarm Ranges............................................................................ 3-21

3.12.1 Setting CPA/TCPA alarm ranges................................................................... 3-21

3.12.2 Acknowledging CPA/TCPA alarm.................................................................. 3-22

3.13 Setting a Guard Zone.............................................................................................. 3-23

3.13.1 Activating the guard zone.............................................................................. 3-23

3.13.2 Sleeping, deactivating a guard zone ............................................................. 3-24

3.13.3 Acknowledging the guard zone alarm ........................................................... 3-24

3.13.4 Guard zone reference................................................................................... 3-25

3.13.5 Guard zone shape and stabilization.............................................................. 3-25

3.14 Operational Warnings.............................................................................................. 3-26

3.15 Trial Maneuver ........................................................................................................ 3-28

3.15.1 Types of trial maneuvers............................................................................... 3-28

3.15.2 Performing a trial maneuver.......................................................................... 3-29

3.15.3 Terminating a trial maneuver......................................................................... 3-31

3.16 ARP Performance Test ............................................................................................ 3-32

3.17 Criteria for Selecting Targets for Tracking................................................................ 3-34

3.18 Factors Affecting ARP Functions ............................................................................. 3-36

4 AIS OPERATION...........................................................................................4-1

4.1 Controls for AIS......................................................................................................... 4-1

4.2 Enabling/Disabling the AIS ........................................................................................ 4-2

4.3 Turning AIS Display On/Off........................................................................................ 4-3

4.4 Setting Up for a Voyage............................................................................................. 4-4

4.5 Activating Targets...................................................................................................... 4-6

4.5.1 Activating specific target ................................................................................. 4-6

4.5.2 Activating all targets........................................................................................ 4-6

4.6 Sleeping Targets........................................................................................................ 4-7

4.6.1 Sleeping an AIS target .................................................................................... 4-7

4.6.2 Sleeping all AIS targets................................................................................... 4-7

4.7 Displaying Target Data .............................................................................................. 4-8

4.7.1 Basic data....................................................................................................... 4-8

4.7.2 Detailed target data......................................................................................... 4-9

4.8 AIS Symbol Attributes.............................................................................................. 4-10

4.8.1 AIS symbol brilliance..................................................................................... 4-10

4.8.2 AIS symbol size and color..............................................................................4-11

TABLE OF CONTENTS

ix

4.9 Past Position Display............................................................................................... 4-12

4.9.1 Displaying and erasing past position points, choosing past position

plot interval....................................................................................................4-12

4.9.2 Past position display attributes...................................................................... 4-13

4.10 Lost Target............................................................................................................... 4-14

4.11 ROT Setting............................................................................................................. 4-15

4.12 Fusion of ARP and AIS Targets................................................................................4-16

4.13 Own Ship’s Data ...................................................................................................... 4-18

4.14 Messages ................................................................................................................4-19

4.14.1 Creating, saving a message.......................................................................... 4-19

4.14.2 Transmitting a message ................................................................................4-20

4.14.3 Viewing AIS messages.................................................................................. 4-21

4.15 AIS System Messages.............................................................................................4-23

5 VIDEO PLOTTER OPERATION....................................................................5-1

5.1 General......................................................................................................................5-1

5.2 Display Modes ........................................................................................................... 5-1

5.3 Presentation Modes................................................................................................... 5-2

5.4 Radar Map................................................................................................................. 5-3

5.4.1 Turning on the radar map display .................................................................... 5-3

5.4.2 Inscribing radar map marks and lines.............................................................. 5-4

5.5 Erasing Radar Map Marks and Lines......................................................................... 5-6

5.5.1 Erasing individual radar map marks and lines .................................................5-6

5.5.2 Erasing all radar map marks and lines.............................................................5-7

5.6 Radar Map Corrections..............................................................................................5-8

5.6.1 Radar map correction...................................................................................... 5-8

5.6.2 Cursor data correction..................................................................................... 5-8

5.7 Chart Cards............................................................................................................... 5-9

5.7.1 Displaying a chart............................................................................................ 5-9

5.7.2 Chart position correction................................................................................5-10

5.7.3 Correcting cursor data................................................................................... 5-10

5.7.4 Chart land color............................................................................................. 5-11

5.8 Hiding/Showing Graphics on the Video Plotter Display ............................................5-12

5.9 Track........................................................................................................................5-13

5.9.1 Plotting own ship’s track................................................................................ 5-13

5.9.2 Plotting other ships’ track...............................................................................5-14

5.9.3 Choosing track color......................................................................................5-14

5.9.4 Erasing track .................................................................................................5-15

5.10 Marks and Lines ......................................................................................................5-16

5.10.1 Inscribing marks and lines............................................................................. 5-16

5.11 Erasing Marks and Lines ......................................................................................... 5-18

5.11.1 Erasing individual marks/lines .......................................................................5-18

5.11.2 Erasing all marks and lines............................................................................ 5-19

5.12 Waypoints................................................................................................................ 5-20

5.12.1 Entering waypoints........................................................................................ 5-20

5.12.2 Editing, erasing waypoints from the menu ..................................................... 5-23

5.12.3 Erasing waypoints .........................................................................................5-24

TABLE OF CONTENTS

x

5.12.4 Waypoint list....................................................................................................5-25

5.12.5 Displaying waypoint name and number...........................................................5-26

5.13 Nav Lines...................................................................................................................5-27

5.13.1 Entering new nav line......................................................................................5-27

5.13.2 Editing nav lines..............................................................................................5-28

5.13.3 Nav line list......................................................................................................5-29

5.13.4 Erasing nav lines.............................................................................................5-30

5.13.5 Setting up nav lines.........................................................................................5-31

5.13.6 Displaying nav line, waypoint mark.................................................................5-33

5.14 Recording Data..........................................................................................................5-35

5.14.1 Initializing memory (RAM) cards......................................................................5-35

5.14.2 Recording data................................................................................................5-36

5.15 Replaying Data...........................................................................................................5-38

5.16 Deleting Files .............................................................................................................5-39

6 MAINTENANCE, TROUBLESHOOTING......................................................6-1

6.1 Periodic Maintenance Schedule...................................................................................6-2

6.2 Life Expectancy of Major Parts ....................................................................................6-3

6.3 Replacing the Fuse......................................................................................................6-3

6.4 Replacement of Battery on GC Board..........................................................................6-4

6.5 Trackball Maintenance.................................................................................................6-4

6.6 Easy Troubleshooting...................................................................................................6-5

6.7 Advanced-level Troubleshooting..................................................................................6-6

6.8 Diagnostics...................................................................................................................6-9

6.9 System Messages...................................................................................................... 6-12

APPENDIX ......................................................................................................AP-1

1. Menu Tree.....................................................................................................................AP-1

2. Digital Interface..............................................................................................................AP-8

3. Parts Lists and Parts Location.....................................................................................AP-29

4. Longitude Error Table (on 96 nm range scale) ............................................................AP-45

INDEX .............................................................................................................. IN-1

Declaration of conformity

xi

FOREWORD

A Word to the Owner of the FAR-28x7/FAR-21x7(-BB)

Congratul ations on your c hoice of the FURUNO FAR-28x7/FAR-21x7(-BB) Series Radar.
We are confident you will see why F URUNO has become synonymous with quali ty and
reliability.

For over 50 year s FURUNO Elec tric Company has enjoyed an enviable reputation f or
innovative a nd dependable marine electronics equipment. This dedicati on to excellence is
furthered by our ex tensive global network of agents and deal er s .

Your radar is designed and const r uc ted to meet t he r igorous deman ds of the marine
environment. However, no mac hine can perform its intended function unless ins talled,
operated an d maintai ned properly. Please carefully r ead and follow the recom m ended
procedures for operation a nd m aintenance.

We would appreciate hearing from you, the end-user, about whether w e ar e ac hieving our
purposes.

Thank y ou for considering and purchasing FURUNO equipment.

Note: The example scr eens s hown in this manual may not m atch the screens you see on

your display. The sc reen you see depends on your sy stem configurat ion and
equipment s ettings.

Features

•

High-resolution 20.1-i nch LCD (FR-21x 7) or 23.1-inch LCD (FR-28x7).

•

This series of radar and ARP (automatic radar plotter, incl udes ARPA or ATA) are
availabl e in the models shown in the table below. “BB” means blackbox conf iguration
(monitor t o be s upplied locally) is avail able.

X-band S-band

Model Output

TR config.

Model

Output

TR config.

FAR-2117(-BB) 12 kW

UP

FAR-2137S(-BB) 30 kW

UP

FAR-2127(-BB) 25 kW

UP

FAR-2837S 30 kW

UP

FAR-2817 12 kW

UP

FAR-2837SW 30 kW

DOWN

FAR-2827 25 kW

UP

FAR-2827W 25 kW

DOWN

FOREWORD

xii

•

Two types of trac k ball-equipped control units are available: RCU-014 ( full keyboar d) and
the RCU-015 (palm cont r ol). The trackball is eas y to use thanks to the ergonomically
designed p alm rest.

•

Simplif ied operation w ith point-and-click menu oper ation.

•

All functions are accessi ble by using the trackball alone.

•

Applicable to HSC (High Speed Craft)

•

ARPA (Automat ic Radar Plotting Aid) or ATA (Automatic Tracking Aid) + AIS, Radar Plotter
and Interswitch supplied as standard. ( A RPA or ATA selectable on inst allation menu.)

•

Meets the following requirements:
IMO MSC.64( 67) Annex 4: Performance s tandards f or Radar equipment

IEC 60936-1 (1999): Shipborne radar-Performance r equirements
IEC 60936-1 Am. 1 ( 2002-06): Unwanted emissions of radar systems
IMO A.823 (19): Performance standards for ARPAs
IEC 60872-1 (1998): ARPA – Perfor m ance requir ements
IMO A.820(19): Performanc e s tandards f or navigational r adar equipment for high speed

craft
IEC 60936-2 (1998): Radar f or high speed craft – Performance requir em ents
IMO A. 694(17): G eneral requirem ents f or electronic navi gational aids ( including ATA)
IEC 60945 (2002-08): Maritime Navigat ional Equipment Gener al Requirements
IEC 61162-1 and 2: Maritime navigation equipm ent-digital interf ace

IEC 60936-5: Guidelines for the use and display of AIS information on Radar
IEC 60872-2: ATA performanc e r equirements

•

Guard alarm watches for targets entering or exiting the guard zone

•

TCPA/CPA alarms

•

Electronic parallel index lines

•

42 rpm antenna for high speed cr aft

xiii

PROGRAM NUMBER

PC Board Program No. Version No. Date of Modification

SPU 035-9204 01.**
RFC 035-9202 01.**
KEY(REMOTE) 035-9203 01.**
CARD 035-9209 01.**

** Program Version No.

xiv

SYSTEM CONFIGURATION

With FURUNO-supplied monitor

ANTENNA UNIT

(Performance Monitor PM-51 built in)

TRANSCEIVER UNIT

RTR-082

For FAR-2837SW

FAR-2137S/2837S/2837SW

POWER SUPPLY UNIT

PSU-007

For FAR-2137S/2837S

PROCESSOR UNIT

RPU-013

FAR-2117/2127/2817/2827/2827W

Waveguide or
Coax cable
(For FAR-2837SW)

VDR

External Monitor

Sub Display

Alarm

MONITOR UNIT

MU-201CR
(FAR-21x7)

or
MU-231CR
(FAR-28x7)

CONTROL UNIT

RCU-014

(Keyboard)

or

RCU-015

(Trackball)

Control Unit

RCU-016
(Remote)

24 VDC

or

115/230 VAC

115/230 VAC

RU-3423

24 VDC

Navigator (INS, GPS, etc.)

IEC-61162-1 Serial Data

(Input/Output)

IEC-61162-1 Serial Data

(Input)

Speed Log

Gyrocompass

AIS

AD-100

TRANSCEIVER UNIT

RTR-081

For FAR-2827W

Waveguide
(For FAR-2827W)

: Option

: Dockyard supply

: Standard

Category of Units

Antenna unit: Exposed to weather
All other units: Protected from weather

ANTENNA UNIT

(Performance Monitor PM-31 built in)

24 VDC

or

100-115 VAC/

220-230 VAC

1φ, 50-60 Hz

Rectifier

RU-3424

RU-1746B-2

Transformer Unit

RU-1803

440 VAC

1φ, 50-60 Hz

DC spec

AC spec

100/110/115/
220/230 VAC
1φ, 50-60 Hz

For power for
antenna unit
see next page.

Track Control Unit

Memory Card
Interface Unit

CU-200

OR

Memory Card
Interface Unit

CU-200 x 2

Switching Hub

HUB-100

HUB has ports for connection of up to 7 processor units

100-230 VAC

SYSTEM CONFIGURATION

x

v

Antenna unit

FAR-2117,
FAR-2117-BB
FAR-2127,
FAR-2127-BB,
FAR-2827,

RSB-096 (24 rpm)
RSB-097 (42 rpm)

FAR-2137S,
FAR-2137S-BB

RSB-098/099 (21/26 rpm, 200 VAC, 3ø, 50 Hz; 220 VAC, 3ø, 60 Hz; 380
VAC, 3ø, 50 Hz, 440 VAC, 3ø, 60 Hz)
RSB-100/101/102 (45 rpm, 220 VAC, 3ø, 50/60 Hz(HSC);
440 VAC, 3ø, /60 Hz(HSC))

FAR-2827W RSB-103 (24 rpm, powered by processor unit)

FAR-2837S Same as FAR-2137S

FAR-2837SW RSB-104/105 (21/26 rpm, 200 VAC, 3ø, 50 Hz; 220 VAC, 3ø, 60 Hz; 380

VAC, 3ø, 50 Hz, 440 VAC, 3ø, 60 Hz)

Radiator

FAR-2117, FAR-2117-BB
FAR-2127, FAR-2127-BB,
FAR-2827

XN12AF (4 ft), XN20AF (6.5 ft),
XN24AF (8 ft)

FAR-2137S, FAR-2137S-BB SN30AF (10 ft), SN36AF (12 ft)

FAR-2827W XN20AF (6.5 ft), XN24AF (8 ft)

FAR-2837S SN30AF (10 ft), SN36AF (12 ft)

FAR-2837SW SN30AF (10 ft), SN36AF (12 ft)

SYSTEM CONFIGURATION

xvi

Blackbox type

ANTENNA UNIT

(Performance Monitor PM-51 built in)

FAR-2137S-BB

POWER SUPPLY UNIT

PSU-007

For FAR-2137S-BB

PROCESSOR UNIT

RPU-013

FAR-2117-BB/2127-BB

Sub Display

VGA

MONITOR

CONTROL UNIT

RCU-014

(Keyboard)

or

RCU-015

(Trackball)

Control Unit

RCU-016
(Remote)

AIS

: Option

: Dockyard supply

: Standard

Category of Units

Antenna unit: Exposed to weather
All other units: Protected from weather

ANTENNA UNIT

(Performance Monitor PM-31 built in)

24 VDC

or

100-115 VAC/

220-230 VAC

1φ, 50-60 Hz

Rectifier

RU-3424

RU-1746B-2

Transformer Unit

RU-1803

440 VAC

1φ, 50-60 Hz

DC spec

AC spec

100/110/115/
220/230 VAC
1φ, 50-60 Hz

VDR

External Monitor

Alarm

Navigator (INS, GPS, etc.)

IEC-61162-1 Serial Data

(Input/Output)

IEC-61162-1 Serial Data

(Input)

Speed Log

Gyrocompass

AD-100

Track Control Unit

Memory Card

Interface Unit

CU-200

OR

Memory Card
Interface Unit

CU-200 x 2

Switching Hub

HUB-100

HUB has ports for connection of up to 7 processor units

100-230 VAC

SYSTEM CONFIGURATION

xvii

Console type RCN-001/RCN-002

ANTENNA UNIT

(Performance Monitor PM-51 built in)

TRANSCEIVER UNIT

RTR-082

For FAR-2837SW

FAR-2137S/2837S/2837SW

POWER SUPPLY UNIT

PSU-007

For FAR-2137S/2837S

CONSOLE

RCN-001/002

FAR-2117/2127/2817/2827/2827W

Waveguide or
Coax cable
(For FAR-2837SW)

AIS

Gyrocompass

AD-100

TRANSCEIVER UNIT

RTR-081

For FAR-2827W

Waveguide
(For FAR-2827W)

: Option

: Dockyard supply

: Standard

Category of Units

Antenna unit: Exposed to weather
All other units: Protected from weather

ANTENNA UNIT

(Performance Monitor PM-31 built in)

100-115 VAC/

220-230 VAC

1φ, 50-60 Hz

Transformer Unit

RU-1803

440 VAC

1φ, 50-60 Hz

AC spec

Alarm

VDR

External Monitor

Navigator (INS, GPS, etc.)

IEC-61162-1 Serial Data

(Input/Output)

IEC-61162-1 Serial Data

(Input)

Speed Log

Track Control Unit

Memory Card
Interface Unit

CU-200

Switching Hub

HUB-100

100-230VAC

PROCESSOR

UNIT

RPU-013

May also

be installed

externally.

OR

Memory Card
Interface Unit

CU-200

(Max. 2 total)

SYSTEM CONFIG URATION

xviii

Console type RCN-003/RCN-004

ANTENNA UNIT

(Performance Monitor PM-51 built in)

TRANSCEIVER UNIT

RTR-082

For FAR-2837SW

FAR-2137S/2837S/2837SW

POWER SUPPLY UNIT

PSU-007

For FAR-2137S/2837S

CONSOLE

RCN-003/004

FAR-2117/2127/2817/2827/2827W

Waveguide or
Coax cable
(For FAR-2837SW)

AIS

Gyrocompass

AD-100

TRANSCEIVER UNIT

RTR-081

For FAR-2827W

Waveguide
(For FAR-2827W)

: Option

: Dockyard supply

: Standard

Category of Units

Antenna unit: Exposed to weather
All other units: Protected from weather

ANTENNA UNIT

(Performance Monitor PM-31 built in)

100-115 VAC/

220-230 VAC

1φ, 50-60 Hz

Transformer Unit

RU-1803

440 VAC

1φ, 50-60 Hz

AC spec

Alarm

VDR

External Monitor

Navigator (INS, GPS, etc.)

IEC-61162-1 Serial Data

(Input/Output)

IEC-61162-1 Serial Data

(Input)

Speed Log

Track Control Unit

Memory Card
Interface Unit

CU-200

Memory Card
Interface Unit

CU-200

(Max. 2 total)

PROCESSOR

UNIT

RPU-013

Switching Hub

HUB-100

FURUNO

FAR-21x7(-BB)/28x7 SERIES

SP - 1 E3519S01C-M

SPECIFICATIONS OF MARINE RADAR/ARPA

FAR-21x7(-BB)/28x7 SERIES

1. ANTENNA RADIATORS

1. Type Slotted waveguide array

2. Beam width and sidelobe attenuation
X-band S-band

Radiator type

XN12AF XN20AF XN24AF SN30AF SN36AF
Length 4 ft 6.5 ft 8 ft 10 ft 12 ft
Beam width(H) 1.8° 1.23° 0.95° 2.3° 1.8°
Beam width(V) 20° 20° 20° 25° 25°
Sidelobe within ±10° -24 db -28db -28 db -24 db -24 db
Sidelobe outside ±10° -30 db -32 db -32 db -30 db -30 db

3. Polarization Horizontal

4. Rotation FAR-2117/2127/2827: 24 rpm or 42 rpm
FAR-2137S/2837S: 21/26 rpm or 45 rpm
FAR-2827W: 24 rpm
FAR-2837SW: 21/26 rpm

2. RF TRANSCEIVER

1. Frequency X-band: 9410 MHz ±30 MHz, S-band: 3050 MHz ±30 MHz

2. Output power FAR-2117/2817: 12 kW FAR-2127/2827/2827W: 25 kW
FAR-2137S/2837S/2837SW: 30 kW
Unwanted emissions comply with ITU-R RR.

3. Pulselength, PL, PRF and range

Pulselength S1 S2 M1 M2 M3 L
PL (µs) 0.07 0.15 0.3 0.5 0.7 1.2
PRF (Hz) 3000* 3000* 1500 1000 1000 600**
Range scale
(nm)

0.125,

0.25, 0.5,

0.75, 1.5

0.5, 0.75,

1.5, 3

0.75, 1.5,
3, 6

3, 6, 12,
24

3, 6, 12,
24

6, 12, 24,
48, 96,
120#

*: 2200 Hz with ARPA on, 32 nm range **: 450 Hz on 96 and 120 nm ranges #: Non-IMO type only

4. IF 60 MHz

5. Noise figure 6 dB (typical)

6. Duplexer Ferrite circulator with diode limiter for
FAR-2117/2127/2137S/2817/2827/2837S
Ferrite circulator with TR limiter for FAR-2827W/2837SW

3. DISPLAY UNIT

1. Screen Yellow or green echoes in 32 levels. Rasterscan non-interlace at

48.3kHz horizontal, 60 Hz vertical. Non-IMO type has yellow or
green monochrome plus 3-color display according to echo strengths.

FAR-21x7 series FAR-28x7 series
Size, model 20.1-inch color LCD, MU-201CR 23.1-inch color LCD, MU-231CR
Display area (mm) 399.36 x 319.49 470.4 x 352.8
Resolution 1280 x 1024 pixels 1280 x 1024 pixels
Effective radar diameter 308 mm 340 mm

2. Minimum range and

range discrimination 35 m

FURUNO

FAR-21x7(-BB)/28x7 SERIES

SP - 2 E3519S01C-M

3. Range scales (nm), 0.125 (.025), 0.25 (0.05), 0.5 (0.1), 0.75 (0.25), 1 (0.25)*, 1.5 (0.25),

ring interval 3 (0.5), 4 (1)*, 6 (1), 8 (2)*, 12 (2), 16 (4)*, 24 (4), 32 (8)*, 48 (8), 96

(16), 120 (20)* *: Non-IMO type only

4. Range accuracy 1% of the maximum range of the scale in use or 30 m, whichever is
the greater

5. Bearing discrimination Better than 2.5°

6. Bearing accuracy ±1°

7. Presentation mode Head-up, He ad-up TB, North-up, Course-up, True Motion sea or
ground stabilization

8. Plotting facilities Auto or Manual acquisition: 100 targets in 0.1-32 nm

(ARPA or ATA) Auto tracking on all acquired targets

9. Radar map Nav lines, coastlines, buoys, etc. produced by operator. 3000 pts in
radar mode, 6000 pts on IC card in chart mode

10. Guard zone Two GZ anywhere

11. Parallel index line Choice of 2, 4 or 6 lines

12. AIS IMO SN Circ.217, IEC 60936-5

13. Chart cards FURUNO and NAVIONICS

4. INTERFACE

1. IEC 61162-1 Ed. 2 RSD, TTM, AIS related data, etc.

2. Compass Built-in interface (option) for sync signal (20-135 V, 50-400 Hz), or
stepper signal (20-135 VDC), any polarity, for gyrocompass, GPS
compass SC-60/120 by IEC 61162-2

3. Speed log NMEA format data

4. Others Echo sounder, GPS navigator, water temperature, etc.

5. POWER SUPPLY

1. Display unit 24 VDC or 115/230 VAC, 1ø, 50/60 Hz
FAR-21x7: 24 VDC, 2.3 A; 100-230 VAC, 0.7A (100 V)
FAR-28x7: 24 VDC, 3.2 A; 100-230 VAC, 0.9 A (100 V)
440 VAC, 1 ø, 50/60 Hz with optional transformer RU-1803

2. Processor unit FAR-2117/2817/2117-BB:
24VDC: 7.6A

1

/8.5A2, 100-115 VAC: 2.6A1/3.0A2,

220-230 VAC: 1.6A

1

/1.7A2
FAR-2127/2827/2127-BB:
24 VDC: 8.8A

1

/9.7A2, 100-115 VAC: 3.0A1/3.4A2,

220-230 VAC: 1.8A

1

/1.9A

2

1:

24 rpm,

2:

42 rpm

3. Antenna unit (S-band) 200/220/380/440 VAC

115/230 VAC, 1ø, 50 or 60 Hz

Antenna voltage input (100 kt)

200 VAC,
ø3, 50 Hz,
220 VAC,
ø3, 60 Hz

380 VAC,
ø3, 50 Hz,
380 VAC,
ø3, 60 Hz

220 VAC,
ø3, 50 Hz,
(HSC)

220 VAC,
ø3, 60 Hz
(HSC)

220 VAC,
ø3, 60 Hz
(HSC)

FAR-2137S 3.0 A 1.5 A 3.5 A 3.5 A 1.7 A
FAR-2837S 3.0 A 1.5 A 3.5 A 3.5 A 1.7 A
FAR-2837SW 3.0 A 1.5 A - - ­FAR-2137SW 3.0 A 1.5 A 3.5 A 3.5 A 1.7A

FURUNO

FAR-21x7(-BB)/28x7 SERIES

SP - 3 E3519S01D-M

8/17/2004

4. Console 115/230 VAC, 1ø, 50/60 Hz, 440 VAC, 1ø, 50/60 Hz with optional
transformer RU-1803

6. ENVIRONMENTAL CONDITIONS

1. Ambient temperature (Complies with IEC 60945)

Indoor units -15°C to +55°C
Antenna unit -25°C to +55°C (storage +70°C)

2. Relative humidity 95% at 40°C

3. Waterproofing Antenna unit: IPX6 (IEC 60529)
Indoor units: IPX0 (IEC 60529)

4. EMC Full compliance with IEC 60945 Ed. 4
(to 2 GHz cabinet radiation)

7. OPTIONAL EQUIPMENT

SWITCHING HUB HUB-100

1. Access Format CSMA/CD

2. Switching Format Store and Forward

3. Transmission Speed Half-duplex: 10Mbps/100Mbps
Full-duplex: 20Mbps/200Mbps

4. Necessary Cabling 10BASE-T: Category 3 or higher STP cable
100 BASE-TX: Category 5 or higher STP cable

5. Max. Cable Length 100 m

6. Ports 8 ports

- All ports auto-MDIX compliant (straight or cross cable,
automatic recognition)

- All ports EMC compliant (STP cable port)

- All ports equipped with 3 LED injectors
(Link/Act, Full-duplex/Collision, 100Mbps/10Mbps)

7. Buffer Memory SRAM buffer

8. MAC Address Table 1024

9. Dimensions and Mass

Dimensions 47(H)x270(W)x1458(D) (mm) includes fixing screws
Mass Less than 1.6 kg

10. Environmental Conditions

Ambient Temperature -15 to +55°C
Relative Humidity 95% (at 40°C)
EMC IEC 60945
Waterproofing IPX0 (IEC 60529)

11.Power and Power Consumption

Power 100-230 VAC
Power Consumption 100mA/100 VAC

12. Coating and Color N3.0

FURUNO

FAR-21x7(-BB)/28x7 SERIES

SP - 4 E3519S01C-M

Precautions for high speed targets

Assume your ship is making 40 kt and a target ship is approaching at 49 kt right toward you. Then
the relative speed is 80 kt. With the antenna rotating at 42 rpm, the target blip appears jumping to a
new location 59 m nearer. This jump corresponds to 19 mm on the display using the 0.25 nm range
scale. On such a short range you may lose the track of a target in the midst of sea clutter, random
noise or other targets. Use one step larger range scale.

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

1-1

1 RADAR OPERATION

1.1 Turning on the Power

The [POWER] switch is located at the left corner of the control unit. Open the
power switch cover and press the switch to turn on the radar system. To turn off
the radar, press the switch again. The screen shows the bearing scale and
digital timer approximately 30 seconds after power-on. The

timer counts

down
three minutes of warm-up time. During this period the magnetron (transmitter
tube) is warmed for transmission. When the timer has reached 0:00, the
indication “ST-BY” appears at the screen center, meaning the radar is now ready
to transmit pulses.

In the stand-by condition, markers, rings, map, charts, etc. are not shown.
Further, ARP is cancelled and the AIS display is erased.

In warm-up and stand-by condition, ON TIME and TX TIME counts in hours and
tenths of hour appear at the screen center.

1.2 Transmitter ON

After the power is turned on and the magnetron has warmed up, ST-BY appears
at the screen center, meaning the radar is ready to transmit radar pulses. You
may transmit by pressing the [STBY/TX] key on the full keyboard or roll the
trackball to choose the TX STBY box at the bottom left corner of the display and
then push the left button (above the trackball). The label at the left-hand side of
the guidance box at the bottom right corner of the screen changes from TX to
STBY.

Guidance
box

STBY

/

TX
STBY

TX STBY box

Radar display

1. RADAR OPERATION

1-2

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

The [STBY/TX] key (or TX STBY box) toggles the radar between STBY and
TRANSMIT status. The antenna stops in stand-by and rotates in transmit. The
magnetron ages with time resulting in a reduction of output power. Therefore, it
is highly recommended that the radar be set to stand-by when not used for an
extended period of time.

Quick start

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

1. RADAR OPERATION

1-3

1.3 Control Unit

Two types of control units are available: Control Unit RCU-014 (full keyboard)
and Control Unit RCU-105 (palm control).

ACQ

ON

MENU

OFF

VRM

A/C SEAA/C RAIN

MODE

3

LINE

INDEX

6

OFF

21

HL

CENTER

OFF

45

RESET

CU/TM

OFFSET

EBL

GAIN

TARGET
CANCEL

TARGET

DATA

RANGE

-

+

LIST

TARGET

9

ENTER

MARK

TIME

VECTOR

78

CANCEL

TRAILS

0

MODE

VECTOR

BRILL

BRILL

EBL

F1

OFFF2ON

ACK

ALARM

F3 F4

STBY

TX

Trackball

Left button Right button

Wheel

Trackball
Module

EBL rotary control VRM rotary control

Control Unit RCU-014 (full keyboard)

F1

F3

F4

F2

Trackball

Left button Right button

Wheel

Trackball
Module

Control Unit RCU-015 (palm control)

1. RADAR OPERATION

1-4

Control description

Control Description
Control Unit RCU-014 (full keyboard)

POWER Turns the system on and off.
EBL and VRM rotary controls Adjust EBL and VRM, respectively.
EBL ON, EBL OFF Turns the EBLs on and off, respectively.
F1-F4 Execute menu short cut assigned.
ALARM ACK Silences audible alarm.
STBY TX Toggles between stand-by and transmit.
BRILL Adjusts display brilliance.
A/C RAIN Suppresses rain clutter.
A/C SEA Suppresses sea clutter.
GAIN Adjusts sensitivity of the radar receiver.
HL OFF Temporarily erases the heading line while pressed.
EBL OFFSET Enables, disables the EBL offset. In menu operation, switches

polarity from North to South and East to West and vice versa.
MODE Chooses presentation mode.
OFF CENTER Shifts own ship position.

CU/TM RESET • Moves own ship position in 75% radius in stern direction.

• Resets the heading line to 0° in course-up and true motion

modes.
INDEX LINE Turns index lines on and off.
VECTOR TIME Chooses vector time (length).
VECTOR MODE Chooses vector mode, relative or true.
TARGET LIST Displays ARP target list.
CANCEL TRAILS Cancels all target trails. In menu operation it clears line of data.
ENTER MARK Enters marks; terminates keyboard input.
VRM ON, VRM OFF Turns the VRMs on and off, respectively
MENU Opens and closes the MAIN menu; closes other menus.
ACQ

• Acquires a target for ARP after choosing it with the trackball.

• Changes a sleeping AIS target to an activated one after

choosing it with the trackball.
RANGE Chooses radar range.
TARGET DATA Displays target data for ARP or AIS target chosen with the

trackball.

TARGET CANCEL Cancels tracking on ARP, AIS or reference target chosen with

the trackball.

Control Unit RCU-015 (palm control)

POWER Turns the system on and off.
F1-F4 Execute menu short cut assigned.

1. RADAR OPERATION

1-5

[MARK]

1 BACK
2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING

OFF/ON

1.4 Main Menu

You may access the MAIN menu from the full keyboard or by using the trackball.
In later sections only the procedure for menu operation by trackball is given.

Main menu operation by keyboard

1. Press the [MENU] key. The MAIN menu appears in the text area at the right
side of the screen.

[MAIN MENU]

1 [ECHO]
2 [MARK]
3 [ALARM]
4 [ARP

l

AIS]
5 [PLOTTER]
6 [CARD]
7 [NAV DATA]
8 [NAV LINE

l

WPT]

9 [CUSTOMIZE

l

TEST]

Echo processing functions
Mainly turns markers on/off.
Sets guard alarm functions; outputs alarm signal.
Sets ARP

and AIS functions.
Chart and track functions
Memory card functions
Turns nav data on/off.
Processes nav lines and waypoints.
Customizes operation; executes diagnostics.

MAIN menu

2. Press the numeral key corresponding to the menu you wish to open. For
example, press the [2] key to open MARK menu.

MARK menu

3. Press the numeral key corresponding to the
item you wish to set.

4. Consecutively press the same numeral key
pressed at step 3 to choose appropriate
option and then press the [ENTER MARK]
key to register your selection.

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

l



To clear a line of numeric data:
Use the [CANCEL TRAILS] key.

l



Switch between plus and minus,
North and South or East and West:
Use the [2] key.

Useful keys in menu operation

1. RADAR OPERATION

1-6

[MARK]

1 BACK
2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING

OFF/ON

Main menu operation by trackball

1. Roll the trackball to choose the MENU box at the right side of the screen. The
guidance box at the bottom right corner (see the illustration at the bottom of
the next page for location) now reads “DISP MAIN MENU.”

MENU

Menu box

2. Push the left button to display the MAIN menu.

[MAIN MENU]

1 [ECHO]
2 [MARK]
3 [ALARM]
4 [ARP

l

AIS]
5 [PLOTTER]
6 [CARD]
7 [NAV DATA]
8 [NAV LINE

l

WPT]

9 [CUSTOMIZE

l

TEST]

Echo processing functions
Mainly turns markers on/off.
Sets guard alarm functions; outputs alarm signal.
Sets ARP

and AIS functions.
Chart and track functions
Memory card functions
Turns nav data on/off.
Processes nav lines and waypoints.
Customizes operation; executes diagnostics.

MAIN menu

3. Roll the wheel to choose the menu you wish to open and then push the
wheel or the left button. For example, choose the 2 [MARK] menu and then
push the wheel or the left button.

MARK menu

4. Roll the wheel to choose item desired and then push the wheel or the left
button.

5. Roll the wheel to choose option desired and then push the wheel or the left
button to register your selection.

6. Push the right button to close the menu. (Several pushes may be necessary
depending on the menu used.)

1. RADAR OPERATION

1-7

1.5 Operation Using the On-Screen Boxes

All radar functions can be accessed by using the trackball alone. This is done by
choosing the appropriate on-screen box with the trackball and operating the
trackball module to choose item and option. (See paragraph 1.9 for location of all
on-screen boxes.) On-screen boxes come in two varieties: Function selection
and function selection w/pop-up menu. On-screen boxes of the latter type have
“►” at the right side of their boxes, as in the MARK box shown below.

To operate the radar using on-screen boxes, do the following:

1. Roll the trackball to place the trackball marker inside the box desired.

Note: The trackball marker changes its configuration according to its location.

It is an arrow when placed outside the effective display and a cursor
(+) when inside the effective display. See the illustration on the next
page for further details.

For example, choose the MARK box, which is at the bottom left corner.

MARK 4

Mark type last
selected, mark
number

-> +

162.5

°

T 11.7 NM

Bearing and range from
own ship to origin mark

1

MARK box

When a box is correctly selected, its color changes from green to yellow
(default colors) and the guidance box at the bottom right corner shows
operational guidance. The operational guidance shows the function of the left
and right buttons, with a diagonal line separating the information. For the
MARK box, for example, the operational guidance is “MARK SELECT /
MARK MENU.” In this case you would push the left button to choose a mark
or push the right button to open the MARK menu.

Guidance box

MARK
SELECT

MARK
MENU

/

Function of left button

Function of right button

Arrow
For choosing
on-screen box

MARK

4

MARK Box

> +

1

Guidance box (Example: guidance for MARK box)

1. RADAR OPERATION

1-8

Trackball marker location and guidance box indication

The trackball marker is either a cursor (+) or an arrow ( ) depending
on whether it is within or outside the display area, respectively.
Further, the indication in the guidance box changes according to
trackball marker location.

Trackball marker is within
effective display area:
The trackball marker is
a cursor

+

Guidance box reads
"TARGET DATA & ACQ / CURSOR MENU."
In this condition you may access cursor-operated
functions, by hitting the left button for direct
selection of function or the right button to choose
desired functions from the CURSOR menu. For
further details about the CURSOR menu,
see paragraph 1.6.

Trackball marker is out of
effective display area
(incl. text area) and
not selecting a box:
The trackball marker is
an arrow

Guidance box reads
"JUMP CURSOR / DISP MENU."
Push the left button to choose the on-screen
box closest to the arrow or push the right
button to display the MAIN menu.

To choose boxes successively, push the wheel
when the guidance box reads as above.
Then, the nearest box is selected and marked
with the double-ended arrow ( ) and the
guidance box reads
"JUMP FORWARD / JUMP BACKWARD."
Hit the left button to go to the box below or
adjacent to the currently selected box or hit
the right button to go to the box above or
adjacent to the currently selected box.
Continue pushing a button to choose boxes
successively. This is convenient for operation
under heavy pitching and rolling. To cancel this
feature, push the wheel when the guidance box
reads as above.

2. Push the left button (or roll the wheel depending on the box) until the desired

option is displayed in the box.

Note: When you chose an on-screen box’s option by rolling the wheel, the

box and its contents turn red. This simply indicates that the chosen
setting is different from the currently active setting. To change the
setting, push the wheel or the left button. If neither the wheel nor the
left button is pushed within about 30 seconds after operating the wheel,
the previous setting is automatically restored.

1. RADAR OPERATION

1-9

[MARK MENU]

1 ORIGIN MARK STAB
GND/SEA
2 MARK KIND
ORIGIN MARK(No.)/
ORIGIN MARK(SYM)/
MAP MARK/
WP 1~50/
WP 51~100/
WP 101~150/
WP 151~198/
OWN SHIP SHAPE

9 MAP DISPLAY
OFF/ON
0 MAP MARK COLOR*
RED/GRN/BLU/YEL/
CYA/MAG/WHT

3. The pop-up menu attached to the MARK box is the MARK menu. To open
the menu, push the right button. The menu opens in the text area at the right
side of the screen.

MARK menu

Note: Any menu may be operated from the full keyboard or the trackball, or a

combination of the two in case of Control Unit RCU-014. Note that in

later sections only the procedure for menu operation by the
trackball is given.

4. Roll the wheel to choose item desired and then push the wheel or the left
button. Selected item is initially shown in reverse video and changes to
normal video and circumscribed when the wheel or the left button is pushed.

5. Roll the wheel to choose option desired and then push the wheel or the left
button. Selected option is initially shown in reverse video and changes to
normal video and circumscribed when the wheel or the left button is pushed.

6. Push the right button to close the menu. (On some menus several presses of
the right button are required to close the menu.)

* Not available

on IMO radar.

1. RADAR OPERATION

1-10

[CURSOR MENU]

2 ↓

TARGET DATA & ACQ/
TARGET CANCEL/
ACQ/

REF MARK/
EBL OFFSET/
OFFCENTER
ZOOM/
MARK DELETE/
CHART ALIGN
8 ↑

1.6 Cursor Menu

Functions which require the use of the cursor, such as EBL offset and zoom,
may be activated directly from the guidance box or from the CURSOR menu,
either method with the cursor inside the effective display area. Below is the
procedure for choosing a cursor-related function from the CURSOR menu. In
later sections only the procedure for selection from the guidance box is given.

1. Roll the trackball to place the cursor inside the effective display area.

2. Roll the wheel to show “TARGET DATA & ACQ / CURSOR MENU” in the
guidance box.

3. Push the right button to show the CURSOR menu.

CURSOR menu

4. Roll the wheel to choose “2” and then push the wheel or the left button.

5. Roll the wheel to choose function desired and then push the wheel or the left
button.

Note: For operation from the keyboard, you may press the [2] key to choose

a function in top-to-bottom order or the [8] key to choose in reverse
order.

Cursor Menu item Description

TARGET DATA & ACQ ARP: Acquires ARP target; displays data for chosen ARP

target.
AIS: Activates sleeping AIS target; display data for chosen
AIS target.

TARGET CANCEL ARP: Cancels tracking on chosen ARP target.

AIS: Sleeps chosen AIS target.

ACQ ARP: Acquires chosen echo.

AIS: Activates chosen AIS target.
REF MARK Inscribes reference mark, for target-based speed input.
EBL OFFSET Offsets EBL, to measure range and bearing between two

targets.
OFF CENTER Shifts screen center to chosen location.
ZOOM Zooms chosen location.
MARK DELETE Deletes chosen mark (plotter mark, origin mark or

waypoint mark).
CHART ALIGN Aligns chart with radar picture.

1. RADAR OPERATION

1-11

6. The guidance box shows “XX / EXIT.” (XX = function chosen). Roll the
trackball to place the cursor where desired.

7. Push the left button to execute the function selected at step 5.

8. To quit the function selected, push the right button when the guidance box
shows “XX / EXIT.” (XX = function chosen at step 5)

1.7 Monitor Brilliance

The brilliance of the entire screen should be adjusted according to lighting
conditions. Monitor brilliance should be adjusted before adjusting relative
brilliance levels on the BRILL menu to be explained later.

Note: The brilliance of a commercial monitor cannot be adjusted from the radar.

See the owner’s manual of the commercial monitor for how to adjust its
brilliance.

By keyboard

Operate the [BRILL] control on the control unit to adjust brilliance. Turn it
clockwise to increase brilliance; counterclockwise to decrease brilliance. Watch
the BRILL box (see illustration below) to know current brilliance level.

By trackball

1. Roll the trackball to place the arrow on the brilliance level indicator in the
brilliance level indication box at the bottom left corner of the screen.

BRILL1 4

Place arrow inside box
to adjust screen brilliance.

Brilliance bar
Shows brilliance level.

26

Brilliance level

Brillance, color set no.
(For details, see para. 1.50.)

Brilliance level indicator

2. Roll the wheel downward to increase brilliance or roll it upward to decrease
brilliance. The length of the brilliance bar increases or decreases with
operation of the wheel.

Note: If nothing appears on the screen at power-up when using Control Unit

RCU-015 (palm control) or when the radar is in stand-by, press and hold
down any key except the power switch for four seconds to automatically
set up for medium display brilliance.

1. RADAR OPERATION

1-12

1.8 Choosing the Display Mode

This radar has two display modes: Radar and Radar + Plotter. Choose a display
mode as below. Note that a display mode cannot be chosen when the menu is
open.

1. Roll the trackball to place the arrow in the DISPLAY MODE box at the top of
the screen.

DISPLAY
XX*

4

* XX = display mode
(RADAR, +PLOTTER)

DISPLAY MODE box

2. Push the left button to choose appropriate mode:

RADAR: Radar picture

+PLOTTER: Radar picture + plotter picture (incl. chart)

1. RADAR OPERATION

1-13

1.9 On-Screen Boxes and Markers

6
HEAD UP TB RM

MENU

HDG

4

000.0°T

ANT 1 X-BAND

4

PULSE S1

PICTURE4

4

IR OFF
ES OFF
EAV OFF
AUTO RAIN
OFF

NM/1DISPLAY

RADAR

4

GAIN
SEA AUTO
RAIN
TUNE AUTO

0. 9ktDRIFT

000. 0°TSET

34°40. 649 N

135°18. 303 E

+

SPD

4

0.0kt BT

ARPA AIS

OFF

4

SB

0.0kt

COG

00.0°T

SOG

0.0kt

OS POSN

4

VECTOR TRUE

30M
PAST POSN REL 3M
CPA LIMIT 0. 5NM 22MIN

TARGET
LIST

4

CU/TM
RESET

ALARM
ACK

TARGET
DATA & ACQ

CURSOR
MENU

GZ1

IL1

MARK

4

032. 0°T

190.0°T, 5.75NM

+

BRILL1

4

WATCH
11 : 28

HL
OFF

EBL1

>280.9°T<

EBL2

240. 8°R

TX
STBY

5. 60NM

ON

GZ2
ALARM1
ALARM2

VRM1

>3.682NM<

VRM2

5.221NM

000

010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

OFF
MANU

4

North
Marker

Stern
Marker

TRUE TRAIL OFF

4

AIS DISP Box

25
22
19

ALIGN

Chart Align ON

DISP

Note: Speed, Set and
Drift values not shown.

GAIN Setting
A/C SEA Setting
A/C RAIN Setting
TUNING Setting

Position

MENU Box

AIS Message Arrival

Guidance
Box

WATCH Box
(Alarm watch
time)

EBL2 Box
EBL1 Box

TX/STBY Box
HL OFF Box
BRILL Box

MARK Box
Bearing and range to mark

IL (Index Line) Box
Index line orientation,
Index line interval

VRM2 Box

CPA LIMIT Box

PAST POSN Box

ARP VECTOR Box

ARP ACQ
MODE Box*

SET and DRIFT Boxes

CURSOR DATA Box

DISPLAY MODE Box

RANGE Box

PRESENTATION MODE Box

ANTENNA Box

PULSELENGTH Box

PICTURE Box, Main Picture Settings

VRM1 Box
TRAIL MODE Box
ALARM Box

Guard Zone (GZ) Box

TARGET LIST
Box

Heading
Speed, Source

Heading Marker

Heading
Line

Guard
Zone

Cursor

No. 2
EBL

No. 1
EBL

No. 1
VRM

No. 2
VRM

Range
Rings

Index
Line

CU/TM
RESET,
ALARM ACK
Box

ZOOM or ARP
DATA BOX
(See next page.)

ALERT BOX
(See next page.)

Origin Mark

OS
Symbol

Log Speed
Course over Ground
Speed over Ground,
Source

34

°

40.00N

135°24.00E

DGPS

ZOOM, ARP,
or AIS DATA BOX
(See next page.)

ARP,
AIS DATA BOX

26

TRIAL OFF

Trial Maneuver (Elapsed time shown
when trial maneuver is active.)

WT
MAN

GPS

REF POINT
ANT POSN

Reference Point Box

*: "ATA" replaces
"ARPA" when
ATA function is
used.

Display screen

1. RADAR OPERATION

1-14

Guidance Box

ARP, AIS Functions Box

GUARD ALARM, TIMER ALARM, GUARD ZONE,
LOST TRGT, CPA/TCPA, TARGET FULL(AUTO),
TARGET FULL(MAN), AZIMUTH, HEAD LINE,
TRIGGER, VIDEO, GYRO, LOG, EPFS, XTE,
ARRIVAL WPT, DEPTH,RECEIVE, other

ARP TARGET
No. 42

BRG 25.5°T

RNG 3.4NM
T CSE 264.0°T
T SPD 12.3KT

CPA 2.9NM

TCPA 12.2MIN

BCR 1.7NM

BCT 20MIN

20
40

60
80

100

-30 20 10

DEPTH 22.30 m WIND 15.4 m/s

HDG

4

242.2°T

SPD

4

9.9kt BT

SB

0.1kt

COG

30.2°T

SOG

10.2.2kt

OS POSN

4

34°40.00N

135°24.00E

DGPS

45.1°T

Wind Speed and Angle
(True or Relative angle)

Electronic Position-fixing

System and position*

Heading is TRUE
(variation-corrected gyro or
magnetic heading)
Speed data is LOG, MAN, etc.,
showing sensor and types.
CSE when water tracking mode is
selected.
STW when water tracking
mode is selected.

ARP Target
Data
(See Chapter 3.)

* GPS, DGPS,
PPS, RTK, FRTK,
DR. PPS, RTK
and FRTK require
GGA sentence.

Tide relative to North,
full scale 10 kt
Wind direction relative to
own ship heading, full
scale 100 kt.

S

WE

N

Depth

Depth
Echogram
(See 1.40.)

Alert Box
(Warnings and Alert
Messages)

Current speed and direction
Water temperature, TTG
WPT no., range and bearing
to waypoint
Date, time

CURRENT 2.3kt 69.9

°

R
TEMP 16°C TTG 00:00:00
WPT001 6.5NM 35.2°R
DATE OCT/25/03 10:00 UTC

ARP Target
Data (or
Zoom)

Zoom display appears
in nav data box when
nav data is turned off.

WT
MAN

GPS

Data fields

1. RADAR OPERATION

1-15

[ECHO]

1 BACK
2 2

ND

ECHO REJ

OFF/ON
3 TUNE INITIALIZE
4 PM

OFF/ON
5 SART
OFF/ON
6 WIPER
OFF/1/2

1.10 Tuning the Receiver

1.10.1 Choosi ng the tuning method

The tuning method can be selected with the TUNE box at the top of the screen.

1. Roll the trackball to choose the TUNE box (TUNE AUTO or TUNE MAN) at
the top of the screen.

TUNE AUTO

Place arrow inside box
to adjust tuning, when
TUNE MANU is selected.

Tuning method (AUTO or MANU)

Tuning bar

Tuning level

TUNE box

2. Push the left button or roll the wheel to display TUNE AUTO or TUNE MAN
as appropriate.

3. If you used the wheel to choose tuning method, push the wheel or the left
button to change setting.

1.10.2 Initializing tuning

Automatic tuning is initialized during the installation. However, if you feel that
automatic tuning is not working properly try re-initializing it as follows:

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the wheel or the left button.

2. Roll the wheel to choose 1 ECHO and then push the wheel or the left button.

ECHO menu

3. Roll the wheel to choose 3 TUNE INITIALIZE.

4. Push the wheel or the left button to initialize automatic tuning. (For operation
from the keyboard, press the [ENTER MARK] key.) “WORK IN PROGRESS
– TUNE INITIALIZE appears in the Alert Box during the initialization.

5. Push the right button twice to close the menu.

1. RADAR OPERATION

1-16

1.10.3 Automatic tuning

Choose automatic tuning following paragraph 1.10.1. The TUNE box shows
TUNE AUTO.

1.10.4 Manual tuning

1. Roll the trackball to choose the RANGE box at top left corner and then push
the left or right button as appropriate to choose the 48-mile range. Push the
left button to lower the range; the right button to raise the range.

2. Choose manual tuning following the procedure in paragraph 1.10.1.

3. Roll the trackball to place the arrow on the tuning bar area in the TUNE box.

4. Roll the wheel to adjust tuning. The best tuning point is where the bar graph
swings maximum. The arrow below the bar graph shows tuning control
position; not the tuning condition.

1. RADAR OPERATION

1-17

[HDG MENU]

1 HDG SOURCE

AD-10/SERIAL

2 GC-10 SETTING

000.0°

1.11 Aligning Heading with Gyrocompass

With connection of a gyrocompass, ship's heading is displayed at the right side
of the screen. Upon turning on the radar, align the on-screen GYRO readout with
the gyrocompass reading by following the procedure shown below. Once you
have set the initial heading correctly, resetting is not usually required. However, if
the GYRO readout looks wrong or the gyro alarm sounds, follow the procedure
below. Note that the FURUNO SC-60/120 does not require alignment on the
radar.

1. Roll the trackball to place the arrow in the HDG box at the top right corner of
the screen.

2. Push the right button to open the HDG menu.

HDG menu

3. Roll the wheel downward to choose GC-10 SETTING and then push the
wheel or the left button.

Note: If heading source selected is not suitable change it at 1 HDG SOURCE

to match your heading source.

4. Roll the wheel to set the heading. (For entry through the keyboard use the
numeric keys.)

5. Push the wheel to finish.

6. Push the right button to close the menu.

1. RADAR OPERATION

1-18

1.12 Presentation Modes

This radar has the following presentation modes:

Relative Motion (RM)

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

where the bearing scale rotates with the compass reading.
Course-up: Compass-stabilized relative to ship’s orientation at the time of
selecting course-up.
North-up: Compass-stabilized with reference to north

True Motion (TM)

North-up: Ground or sea stabilized with compass and speed inputs

1.12.1 Choosi ng pr esentation mode

By keyboard

Press the [MODE] key consecutively to choose presentation mode desired. The
PRESENTATION MODE box shows the current presentation mode. (See the
illustration below.)

By trackball

1. Roll the trackball to place the arrow in the PRESENTATION MODE box at

the top left corner of the screen.

HEAD UP RM*

* = Other modes:
HEAD UP TB RM, COURSE UP RM,
NORTH UP RM, NORTH UP TM

PRESENTATION MODE box

2. Push the left button to choose mode desired.

Loss of gyrocompass signal

When the compass signal is lost, “HEADING SET” appears in red at the gyro
readout, the presentation mode automatically becomes head-up, all ARP and
AIS targets and map or chart are erased. After restoring the compass signal,
choose the presentation mode with the [MODE] key or the PRESENTATION
MODE box.

1. RADAR OPERATION

1-19

1.12.2 Description of presentation modes

Head-up mode

The head-up mode is a display in which the line connecting own ship and the top
of the display indicates own ship’s heading.

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 heading sensor
north. A failure of the heading sensor input will cause the north marker to
disappear and the readout to show ***.*° and the message HDG SIG MISSING
appears in red at the lower-right corner of the screen.

Heading Line

North Marker

Note: When display is off-centered,
the heading mark appears at 000 degrees.

Head-up mode

Course-up mode

The course-up mode is 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 0-degree position. The
heading line moves in accordance with ship’s yawing and course change. This
mode is useful to avoid smearing of picture during course change.

Heading Line

North Marker

Course-up mode

1. RADAR OPERATION

1-20

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

This mode is available when the radar is interfaced with a gyro heading sensor.
If the gyro heading sensor fails, the bearing scale returns to the state of head-up
mode.

North-up mode

The north-up mode paints target pips at their measured distances and in their
true (heading sensor) directions from own ship, north bearing maintained at the
top of the screen. The heading line changes its direction according to the ship’s
heading. Requires heading signal.

If the compass fails, the presentation mode changes to head-up and the north
marker disappears. Also, the HDG indication shows ***.*°. And the message
HDG SIG MISSING appears in red at the lower-right corner of the screen.

Heading Line

North Marker

North-up mode

1. RADAR OPERATION

1-21

True motion mode

Own ship and other moving objects move in accordance with their true courses
and speed. In ground stabilized TM, all fixed targets, such as landmasses,
appear as stationary echoes. In the sea stabilized TM without set and drift inputs,
the landmass can move on the screen. Note that true motion is not available on
the 72 nm (non-IMO type only) or 96 nm range scale. If COG and SOG (both
over the ground) are not available on TM mode, enter the set (tide direction) and
drift (tide speed) manually referring to the Tide Table.

When own ship reaches a point corresponding to 50% of the radius of the
display, own ship position is automatically reset to a point of 75% radius opposite
to the extension of the heading line passing through the display center. You may
also reset the own ship symbol manually by pressing the [CU/TM RESET] key,
or roll the trackball to choose the CU/TM RESET box at the bottom right corner
of the display and then push the left button.

If the heading sensor fails, the mode is changed to the head-up and the north
marker disappears. The HDG readout shows ***.*° and the message HDG SIG
MISSING appears in red at the lower-right corner of the screen.

Heading Line

North Marker

True motion mode

Automatic resetting of own ship mark in true motion mode

000 010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350 000 010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

Heading
line

North
marker

000 010

020

030

040

050

060

070

080

090

100

110

120

130

140

150

160

170180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

(a) True motion

is selected

(b) Own ship has reached a

point 75% of display radius

(c) Own ship is automatically

reset to 75% of radius

1. RADAR OPERATION

1-22

[SPEED MENU]

1 SHIP SPEED

LOG(BT)/LOG(WT)/
GPS/MANUAL/REF

2 MANUAL SPEED

0.0kt
3 SET DRIFT
OFF/ON

1.13 Entering Own Ship's Speed

The ARP and azimuth stabilized presentation modes require own ship speed
input and compass signal. The speed can be entered from a log (STW) or GPS
(SOG) or manually on the menu. Note that FURUNO GPS Navigator GP-90
provides COG and SOG.

1.13.1 Automatic speed input b y log or GPS navigator

1. Roll the trackball to place the arrow in the SPD box at the top right corner of

the screen.

2. Push the right button to display the SPEED menu.

SPEED menu

3. Roll the wheel to choose 1 SHIP SPEED and then push the wheel or the left

button.

4. Roll the wheel to choose the appropriate source for automatic speed input

and then push the wheel or the left button.
LOG (BT): Log, speed over ground (SOG). Note that a log cannot produce
BT (Bottom Tracking) speed in deep waters without set and drift
entry.
LOG (WT): Log, speed thru water (STW)
GPS: Speed input by GPS navigator

5. Push the right button to close the menu.

Notes on speed input

•

IMO Resolution A.823(19) for ARPA recommends that a speed log to be
interfaced with an ARPA should be capable of providing through-the-water
speed (forward speed).

•

Be sure not to choose a LOG option when a speed log is not connected. If the
log signal is not provided, the ship speed readout at the top of the screen will
be blank. In the event of a log error, enter speed manually.

•

Warning label SPD **.* and LOG appear if no log signal is present for 30 s
while the ship’s speed has been more than 5 kt.

•

With the serial speed inputs and SOG selection, if the type of data is changed
from SOG to STW the label SOG appears in red (at the upper right corner of
the display).

•

When the AIS feature is active, MANUAL and REF are shown in gray to
indicate they are not available for selection.

1. RADAR OPERATION

1-23

1.13.2 Manual speed input

If the speed log is not working, enter speed manually as below. In this case the
speed data type is shown as MANUAL and is speed thru water (STW). Manual
speed input is not available when the AIS feature is active.

1. Roll the trackball to place the arrow in the SPD box at the top right corner of
the screen.

2. Push the right button to display the SPEED menu.

3. Roll the wheel to choose 1 SHIP SPEED and then push the wheel or the left
button.

4. Roll the wheel to choose MANUAL and then push the wheel or the left button.

5. Roll the wheel to choose 2 MANUAL SPEED and then push the wheel or the
left button.

6. Roll the wheel to set speed. (For entry through the keyboard, use the
numeric keys.)

7. Push the wheel to finish.

8. Push the right button to close the menu.

1. RADAR OPERATION

1-24

1.14 Choosing the Range Scale

The selected range scale, range ring interval and pulselength are shown at the
upper left corner on the screen. When a target of interest comes closer, reduce
the range scale so that it appears in 50-90% of the display radius.

By keyboard

Use the [RANGE] key to choose range desired. Hit the “+” part of the key to
raise the range; the “-“ part to lower the range.

By trackball

1. Roll the trackball to choose the RANGE box at the top left corner of the
screen. The guidance box shows “RANGE DOWN / RANGE UP.”

0.125

NM

0.025

RANGE box

2. Push the left button to lower the range; the right button to raise the range.
You may also choose the range by rolling the wheel and then pushing it or
the left button.

1. RADAR OPERATION

1-25

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT (ENTERX3)

1.15 Choosing the Pulselength

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

Label and pulselength

Indication Pulselength (µs)

S1 (Short pulse 1) 0.07
S2 (Short pulse 2) 0.15
M1 (Medium pulse 1) 0.3
M2 (Medium pulse 2) 0.5
M3 (Medium pulse 3) 0.7
L (Long pulse) 1.2

Appropriate pulselengths are preset to individual range scales and function keys.
If you are not satisfied with the current pulselength settings, you may change
them as shown below.

1.15.1 Choosing pulselength

You can choose the pulselength for the 0.5 to 24 nm range scales as below.

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

Note: The PICTURE box sets up the radar picture according to expected

usage, such as harbor navigation, long range, short range, etc. For
further details see paragraph 1.33.

2. Push the right button to show the PICTURE menu.

PICTURE menu

1. RADAR OPERATION

1-26

[PULSE MENU]

1 BACK
2 0.5NM

S1/S2

3 0.75NM

S1/S2/M1

4 1.5NM

S1/S2/M1
5 3NM
S2/M1/M2/M3
6 6NM
M1/M2/M3/L
7 12-24NM
M2/M3/L

3. Roll the wheel to choose 8 [PULSE] and then push the wheel.

PULSE menu

4. Roll the wheel to choose a range and then push the wheel or the left button.

5. Roll the wheel to choose pulselength desired and then push the wheel or the
left button.

6. Push the right button twice to close the menu.

1.15.2 Choosing pulselength

1. Roll the trackball to choose the PULSELENGTH box at the left side of the
screen. The guidance box shows “PULSE NARROW / PULSE WIDE.”

PULSE XX*

* XX = Pulse width setting

PULSELENGTH box

2. Push the left button to shorten the pulselength or the right button to widen the
pulselength. You may also choose the pulselength by rolling the wheel and
pushing it or the left button.

1. RADAR OPERATION

1-27

1.16 Adjusting the Sensitivity

The gain control adjusts the sensitivity of the receiver.

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.

To adjust receiver sensitivity, adjust the gain control so background noise is just

visible on the screen.

By keyboard

While monitoring the gain level indicator at the top of the screen, operate the
[GAIN] control to adjust the sensitivity.

By trackball

1. Roll the trackball to place the arrow on the gain level indicator at the top of
the screen.

GAIN

Place arrow inside
window to adjust gain.

Level bar

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GAIN level indicator

2. Roll the wheel downward to increase the gain or upward to decrease it. 100
levels (0-100) are available.

1. RADAR OPERATION

1-28

1.17 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 antenna above
the water, the further the clutter will extend. When sea clutter masks the picture,
suppress it by the A/C SEA control, either manually or automatically.

1.17.1 Choosi ng method of adjustment

1. Roll the trackball to choose SEA AUTO or SEA MAN (whichever is shown) at
the top of the display.

SEA AUTO

Place arrow inside window
to adjust A/C SEA.

A/C SEA adjustment
method (SEA AUTO or SEA MAN)

Level bar

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A/C SEA level indicator

2. Push the left button to display SEA AUTO or SEA MAN as appropriate.

1.17.2 Automatic adjustment by the A/C SEA control

Auto A/C SEA allows for fine tuning of the A/C SEA circuit, within ±20 dB.
Accordingly, with the bar reading set to 100, gain is not lowered to minimum as
with manual A/C SEA on close-in ranges. Further, the auto A/C SEA level is low
because the average value of the original input echo is low in areas where there
are no sea surface reflections. For example, when the ship is alongside a quay
and the radar picture shows echoes from both land and sea, you can observe
the size of echoes because the STC curve is different depending size of echoes.

Note: The auto A/C function can erase weak target echoes. Adjust the control

carefully, watching the display.

By keyboard

1. Choose SEA AUTO following the procedure in paragraph 1.17.1.

2. While observing the A/C SEA level indicator, adjust the A/C SEA with the [A/C

SEA] control. 100 levels are available.

1. RADAR OPERATION

1-29

By trackball

1. Choose SEA AUTO following the procedure in paragraph 1.17.1.

2. Roll the trackball to place the arrow in the A/C SEA level indicator at the top
of the display.

3. While observing the A/C SEA level indicator, roll the wheel downward to
increase the A/C SEA or upward to decrease it. 100 levels (0-100) are
available.

1.17.3 Manual adjustment of A/C SEA

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 should be such that the clutter is broken up
into small dots, and small targets become distinguishable. If the setting is set too
low, targets will be hidden in the clutter, while if the setting is 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.

A/C SEA adjusted;

sea clutter suppressed

Sea clutter at

screen center

By keyboard

1. Choose SEA MAN following the procedure in paragraph 1.17.1.

2. Watching the A/C SEA level indicator at the top of the display, adjust the A/C
SEA with the [A/C SEA] control. 100 levels (0-100) are available.

By trackball

1. Choose SEA MAN following the procedure in paragraph 1.17.1.

2. Roll the trackball to place the arrow on the A/C SEA level indicator at the top
of the display.

3. While observing the A/C SEA level indicator, roll the wheel downward to
increase the A/C SEA or upward to decrease it. 100 levels (0-100) are
available.

1. RADAR OPERATION

1-30

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C

8 [PULSE]
9 [CONDITION]
0 DEFAULT (ENTERX3)

1.18 Suppressing Rain Clutter

Use the AUTO RAIN and A/C RAIN to suppress rain clutter. AUTO RAIN
suppresses rain clutter in the picture and A/C RAIN suppresses clutter picked up
by the antenna.

1.18.1 Turning AUTO RAIN on or off

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

2. Push the right button to show the PICTURE menu.

PICTURE menu

3. Roll the wheel to choose 6 AUTO RAIN and then push the wheel.

4. Roll the wheel to choose AUTO RAIN setting desired. The higher the number
the greater the degree of rain clutter suppression. OFF turns off the AUTO
RAIN feature.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-31

1.18.2 Adjusting A/C RAIN

The vertical beam width of the antenna 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.

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). The higher the setting the
greater the anti-clutter effect. When echoes from precipitation mask solid targets,
adjust the A/C RAIN control to split up these unwanted echoes into a speckled
pattern, making recognition of solid targets easier.

A/C RAIN control
OFF

A/C RAIN control
adjusted

Appearance of rain clutter

Keyboard

Adjust the A/C RAIN with the [A/C RAIN] control.

Trackball

1. Roll the trackball to place the cursor in the A/C RAIN level indicator at the top
right side of the display.

RAIN

Place arrow inside window
to adjust A/C RAIN,

Level bar
(Shows A/C RAIN level.)

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A/C RAIN level indicator

2. While observing the A/C RAIN level indicator, roll the wheel downward to
increase the A/C RAIN or upward to decrease it. 100 levels (0-100) are
available.

1. RADAR OPERATION

1-32

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT (ENTERX3)

1.19 Interference Rejector

Mutual radar interference may occur in the vicinity of another shipborne radar
operating in the same frequency band. It is seen on the screen as a number of
bright spikes either in irregular patterns or in the form of usually curved
spoke-like dotted lines extending from the center to the edge of the picture.
Activating the interference rejector circuit can reduce this type of interference.

The interference rejector is a kind of signal correlation circuit. It compares the
received signals over successive transmissions and suppresses randomly
occurring signals. There are three levels of interference rejection depending on
the number of transmissions that are correlated.

Interference

3. Roll the trackball to choose the PICTURE box at the left side of the screen.

4. Push the right button to show the PICTURE menu.

PICTURE menu

1. RADAR OPERATION

1-33

3. Roll the wheel to choose 1 INT REJECT and then push the wheel.

4. Roll the wheel to choose rejection level desired and then push the wheel or
the left button. “3” provides the highest degree of suppression.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-34

[MARK]

1 BACK
2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING
OFF/ON

1.20 Measuring the Range

The range to a target may be measured three ways: with the fixed range rings,
with the cursor, or with the VRM.

Use the fixed range rings to obtain a rough estimate of the range to a target.
They are the 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. Count the
number of rings between the center of the display and the target. Check the
range ring interval and judge the distance of the echo from the inner edge of the
nearest ring.

1.20.1 Turning range rings on/off

1. Roll the trackball to choose the MENU box at the right side of the screen. The
guidance box at the bottom right corner (see the illustration at the bottom of
the next page for location) now reads “DISP MAIN MENU.”

2. Push the left button to display the MAIN menu.

3. Roll the wheel to choose 2 [MARK] and then push the wheel or the left
button.

MARK menu

4. Roll the wheel to choose 0 RING and then push the wheel or the left button.

5. Roll the wheel to choose OFF or ON as appropriate and then push the wheel
or the left button.

6. Push the right button twice to close the menu.

1. RADAR OPERATION

1-35

1.20.2 Measuring range by the variable range marker (VRM)

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

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No. 1
VRM

Target
blip

No. 2
VRM

VRM1
VRM2

>0.66NM<

1.18NM

Measuring range with VRMs

By keyboard

1. Press the [VRM ON] key to display either of the VRMs. Successively
pressing the [VRM ON] key toggles the active VRM between No. 1 and No. 2.

The currently active marker is enclosed with >.....<.

2. Operate the VRM rotary control to align the active variable range marker with
the inner edge of the target of interest and read its distance at the lower-right
corner of the screen. Each VRM remains at the same geographical distance
when you operate the [RANGE] key or the RANGE box. 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.

By trackball

1. Roll the trackball to place the arrow in the VRM1 or VRM2 box, whichever
VRM you want to use.

VRM1

VRM2

VRM boxes

2. The guidance box reads “VRM ON/.” Push the left button to turn on the VRM.
The guidance box now reads “VRM SET L = DELETE /.”

3. Push the left button again and the cursor jumps to inside the effective display
area. The guidance box now reads “VRM FIX / EXIT.”

1. RADAR OPERATION

1-36

4. Roll the trackball (coarse adjustment) or wheel (fine adjustment) to align the
active variable range marker with the inner edge of the target of interest and
read its distance at the lower-right corner of the screen. Each VRM remains
at the same geographical distance when you operate the [RANGE] key. This
means that the apparent radius of the VRM ring changes in proportion to the
selected range scale.

5. Push the left button to anchor the VRM and fix its readout, or push the right
button to return the VRM to its previous location (range).

6. To erase a VRM, choose the appropriate VRM readout box and then push
the left button until the VRM disappears from the screen.

1. RADAR OPERATION

1-37

1.21 Measuring the Bearing

Use the Electronic Bearing Lines (EBLs) to take bearings of targets. There are
two EBLs, No. 1 and No. 2. 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.

1.21.1 Measuring the bearing

By keyboard

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 and No. 2. The

currently active marker is enclosed with >.....<.

2. Operate 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.

Note: Each EBL carries a range marker, or a short line crossing the EBL at

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

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

1. RADAR OPERATION

1-38

By trackball

1. Roll the trackball to place the arrow in the EBL1 or EBL2 box, whichever EBL
you want to use.

EBL1

EBL2

EBL boxes

2. The guidance box reads “EBL ON/.” Push the left button to turn on the EBL.

The guidance box now reads “EBL SET L=DELETE /.”

3. Push the left button again and the cursor jumps to inside the effective display

area. The guidance box now reads “EBL FIX L=DELETE/.”

4. Roll the trackball (coarse adjustment) or wheel (fine adjustment) to bisect the

target with the EBL.

Note: Each EBL carries a range marker, or a short line crossing the EBL at

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

5. Push the left button to anchor the EBL and fix its readout, or push the right

button to return the EBL to its previous location (bearing).

6. To erase an EBL, choose the appropriate EBL readout box and then push the

left button until the EBL disappears from the screen.

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No. 2
EBL

Target
blip

No. 1
EBL

Range markers
on EBLs

VRM1

VRM2

12.1NM

EBL1

EBL2

>128.0°T<

100.8

°

T

>10.2

NM

<

Measuring bearing with EBLs

1. RADAR OPERATION

1-39

[MARK]

1 BACK
2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING
OFF/ON

1.21.2 Choosing true or relative bearing

The EBL readout is affixed by “R.” (relative) if it is relative to own ship's
heading, ”T.” (true) if it is referenced to the north. You may choose relative or true
in the head-up modes; in all other modes it is always TRUE.

To choose bearing reference in the head-up mode, do the following:

1. Roll the trackball to choose the MENU box and then push the left button to
open the MAIN menu.

2. Roll the wheel to choose 2 MARK and then push the wheel or the left button
to open the MARK menu.

MARK menu

3. Roll the wheel to choose 9 EBL CURSOR BEARING and then push the
wheel or the left button.

4. Roll the wheel to choose REL or TRUE as appropriate and then push the
wheel or the left button.

5. Push the right button twice to close the menu.

Note: When the gyrocompass heading changes, the EBL and its indication

change as follows:
Head-up, relative: EBL indication and EBL remain unchanged.
Head-up, true: EBL indication remains the same; EBL moves.
Course-up, true: EBL indication and EBL remain unchanged.
North-up, true: EBL indication and EBL remain unchanged.

1. RADAR OPERATION

1-40

1.22 Collision Assessment by Offset EBL

The origin of the EBL can be placed anywhere with the trackball to enable
measurement of range and bearing between any targets. This function is also
useful for assessment of the potential risk of collision. It is possible to read CPA
(Closest Point of Approach) by using a VRM as shown below (Figure (a)). If the
EBL passes through the sweep origin (own ship) as illustrated (Figure (b)), the
target ship is on a collision course.

1.22.1 How to assess risk of collision by the offset EBL

By keyboard

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

2. Place the cursor (+) on a target appearing as threatening (A in the illustrated
example on the next page) 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 EBL bearing reference setting.

Note: If relative motion is selected, it is also possible to read CPA by using a

VRM as shown in left-hand figure at the top of the next page. If the
EBL passes through the sweep origin (own ship) as illustrated in the
right-hand figure at the top of then next page, the target ship is on a
collision course.

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

By trackball

1. Display an EBL, following steps 1-3 in “By trackball” in paragraph 1.21.1.

2. With the cursor inside the effective display area, push the left button, roll the

wheel to show “EBL OFFSET / EXIT” in the guidance box and then push the
left button.

3. Roll the trackball to place the offset EBL on a target appearing as threatening

(A in the illustrated example on the next page) and then push the left button
to anchor the EBL origin.

4. After waiting for a few minutes (at least 3 minutes), operate the EBL used in
step 1 until it 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 EBL bearing reference setting.

To return the EBL origin to the screen center, show “EBL OFFSET / EXIT” in the
guidance window and then push the left button.

1. RADAR OPERATION

1-41

[MARK]

1 BACK
2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING
OFF/ON

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A

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1

A

A

1

No. 1
EBL

No. 1
EBL

EBL1

>150.3°T<

VRM1

>3.85NM<

EBL1

>138.2°T<

VRM1

>3.85NM<

(a) (b)

Collision assessment by offset EBL

1.22.2 Choosing point of reference for origin point of offset EBL

The origin point of the offset EBL can be ground stabilized (geographically fixed)
or referenced to own ship’s heading (relative).

1. Roll the trackball to choose the MENU box and then push the left button.

2. Roll the wheel to choose 2 MARK and then push the wheel or the left button
to display the MARK menu.

MARK menu

3. Roll the wheel to choose 8 EBL OFFSET BASE and then push the wheel or
the left button.

4. Roll the wheel to choose STAB GND, STAB HDG or STAB NORTH as
appropriate and then push the wheel or the left button.

5. Push the right button twice to close the menu.

1. RADAR OPERATION

1-42

1.23 Measuring Range and Bearing Between Two
Target s

By keyboard

1. Press the [EBL OFFSET] key. Operate the trackball to place the origin of the

No. 1 EBL, for example, on a target of interest (target 1 in the illustrated
example).

2. Operate the EBL rotary control until the EBL passes through another target of

interest (target 2).

3. Operate the VRM rotary control until the range marker on the EBL is on the

inside edge of target 2. The active VRM readout at the lower-right corner of
the screen indicates the distance between the two targets.

4. You can repeat the same procedure on third and fourth targets (targets 3 and

4) by using the No. 2 EBL and the 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 of EBL CURSOR BEARING in
the MARK menu. To return the EBL origin to the screen center, press the [EBL
OFFSET] key again.

By trackball

1. Display an EBL, following steps 1-3 in “By trackball” in paragraph 1.21.1.

2. With the cursor inside the effective display area, push the left button, roll the

wheel to show “EBL OFFSET / EXIT” in the guidance box and then push the
left button.

3. Roll the trackball to place the cursor on target 1 and then push the wheel.

4. Operate the No. 1 VRM until the range marker on the EBL aligns with target 2.

The active VRM readout at the lower-right corner of the screen indicates the
distance between the two targets.

5. You can repeat the same procedure on third and fourth targets (targets 3 and

4) by using the No. 2 EBL and the No. 2 VRM.

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EBL
origin

R2

Target 2

No.1
EBL

No. 2
EBL

Range
Marker

Range/bearing
between targets
1 and 2

Range/bearing
between targets 3 and 4

EBL1

EBL2

>140.0°R<

335.2

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R

VRM1
VRM2

>0.50NM<

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Range
Marker

Target 4

Target 3

Target 1

Measuring range and bearing between two targets

To return the EBL origin to the screen center, show “EBL OFFSET / EXIT” in the
guidance window and then push the left button.

1. RADAR OPERATION

1-43

1.24 Setting a Target Alarm

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

The guard alarm zone has a fixed
width of 0.5 nm in the radial direction
(depth) and is adjustable from 3.0 to

6.0 nm (guard zone 1) and any
distance (guard zone 2). On the
Non-IMO radar the boundaries can be
set at any distance. On any radar type
the sector of the zone can be set from
0 to 360 degrees in any direction.

1.24.1 How to set a target alarm zone

The procedure which follows shows how to set a target alarm zone using the
figure below as an example.

1. Roll the trackball to choose the ALARM1 or ALARM2 box, whichever alarm
you wish to set.

ALARM 1
ALARM 2

ALARM boxes

2. Push the left button. The cursor jumps into the effective display area and
“SET” appears inside the ALARM box chosen.

3. Roll the trackball to place the cursor on point “A” and then push the left
button.

4. Roll the trackball to place the cursor on point “B” and then push the left
button. “WORK” replaces “SET” in the ALARM box. The guard alarm zone’s
lines are dashed and blue.

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320

330

340

350

Guard alarm zone

A

B

Target alarm zone

CAUTION

• The alarm should not be relied upon as

the sole means for detecting possible
collision situations.

• A/C SEA, A/C RAIN and GAIN controls
should be properly adjusted to be sure
the alarm system does not overlook
target echoes.

1. RADAR OPERATION

1-44

Note 1: 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 as point “A.”

Note 2: Two target alarm zones may be set. Note however that the 2

nd

target

alarm zone is available only when the 1

st

target alarm zone is active.

Note 3: When the target alarm zone is not within the range in use the indication

UP RNG appears to the right of the ALARM box. In this case choose a
range which will display the target alarm zone.

1.24.2 Acknowledging the target alarm

A target in the target alarm zone produces both visual (flashing) and audible
(beep) alarms. To silence the audible alarm, press the [ALARM ACK] key on the
full keyboard or choose the appropriate ALARM box and then push the left
button. The ALARM box shows “ALARMx ACK.” This will deactivate the audible
alarm but will not stop the flashing of the offending target. To reactivate the
audible alarm, press the [ALARM ACK] key again or choose the ALARM box and
then push the left button. (When an external buzzer is connected, the audible
alarm does not stop until the alarm zone itself is deactivated.) The ALARM box
shows “ALARMx WORK.”

1.24.3 Deactivating a target alarm

1. Roll the trackball to choose the ALARM1 or ALARM2 box, whichever alarm
you wish to deactivate.

2. Push the left button until the alarm status in the ALARM box disappears. In
the IMO-type radar deactivation of the target alarm zone 1 deactivates target
alarm zone 2. Target alarm zones 1 and 2 work independent on the Non-IMO
radar.

1. RADAR OPERATION

1-45

[ALARM]

1 BACK
2 TARGET ALARM MODE
IN/OUT
3 TARGET ALARM LEVEL
1/2/3/4
4 WATCH ALARM
OFF/6M/10M/
12M/15M/20M
5 ALARM SOUND LEVEL
LOW/MID/HIGH
6 [ALARM OUT1]
7 [ALARM OUT2]
8 [ALARM OUT3]
9 AUDIO ALARM

OFF/ON

1.24.4 Target alarm attributes

You may choose the echo strength level which triggers the alarm, the condition
which generates the target alarm and the volume of the audible alarm as follows:

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

3. Roll the wheel to choose 3 [ALARM] and then push the wheel or the left
button.

ALARM menu

4. Roll the wheel to choose 2 TARGET ALARM MODE and then push the wheel
or the left button.

5. Roll the wheel to choose IN (guard zone) or OUT (anchor watch) as
appropriate and then push the wheel or the left button.

Inward target alarm

Outward target alarm

Alarm types

6. Roll the wheel to choose 3 GUARD ALARM LEVEL and then push the wheel
or the left button.

7. Roll the wheel to choose echo strength level which will trigger the alarm and
then push the wheel or the left button. “4” is highest strength.

8. Roll the wheel to choose 5 ALARM SOUND LEVEL and then push the wheel
or the left button.

9. Roll the wheel to choose audible alarm volume, from among LOW, MID and

HIGH, and then push the wheel or the left button.

Note: 5 ALARM SOUND LEVEL also sets the level of the audible alarm for

the watch alarm. 9 AUDIO ALARM enables or disables the audio
alarm.

10. Push the right button twice to close the menu.

1. RADAR OPERATION

1-46

1.25 Off-Centering the Display

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

This feature is not available on the 72 nm (Non-IMO type only) or 96 nm range
scale nor in the true motion mode.

To off-center the radar picture, do the following:

By keyboard

1. Roll the trackball to place the cursor at a position where you wish to move the
sweep origin.

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

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

By trackball

1. With the cursor inside the effective display area, roll the wheel to display
“OFF CENTER / EXIT” in the guidance box and then push the wheel or the
left button.

2. Roll the trackball to place the cursor where you want to locate the screen
center.

3. Push the left button to off center the sweep origin.

4. To cancel the off-center function, push the left button when the guidance box
reads “OFF CENTER / EXIT.”

Cursor

Place cursor where desired
and execute appropriate
OFF CENTER procedure

Off-centered display

How to off-center the display

1. RADAR OPERATION

1-47

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT (ENTERX3)

1.26 Echo Stretch

The echo stretch feature enlarges targets to make them easier to see, and it is
available on the 1.5 -12 nm ranges depending on echo stretch type. There are 3
settings: ES1 to enlarge in bearing direction for long range detection, ES2 to
enlarge in range direction and ES3 to enlarge in bearing and range directions.

Echo Stretch 1 Echo Stretch 2 Echo Stretch 3

Bearing
direction

Range
direction

Echo Stretch OFF

Target

Bearing
direction

Range
direction

Use on range

1.5 - 12 nm

Use on range

1.5 - 6 nm

Echo stretch

Note 1: If the 1.5 nm is preset with a pulselength of S1 or S2, and the 3 nm

scale with S2, the echo stretch is not available on those range scales.

Note 2: The echo stretch magnifies not only small target pips but also returns

(clutter) from sea surface, rain and radar interference. For this reason,
make sure these types of interference have been sufficiently
suppressed before activating the echo stretch.

1. Roll the trackball to choose the PICTURE box at the left side of the display.

2. Push the right button to show the PICTURE menu.

PICTURE menu

3. Roll the wheel to choose 2 ECHO STRETCH and then push the wheel or the
left button.

4. Roll the wheel to choose desired echo stretch and then push the left button.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-48

1.27 Echo Averaging

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

To distinguish real target echoes from sea clutter, echoes are averaged 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
reduced brilliance, making it easier to discriminate real targets from sea clutter.

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.

Note 1: Do not use the echo average function under heavy pitching and rolling;

loss of target detection can result.

Note 2: Echo average can be used without a heading sensor. For further details,

contact your dealer.

To properly use the echo average function, it is recommended to first suppress
sea clutter with the A/C SEA control. Then, do as follows:

1. Roll the trackball to choose the PICTURE box at the left side of the display.

2. Push the right button to show the PICTURE menu.

3. Roll the wheel to choose 3 ECHO AVERAGE and then push the wheel or the
left button.

4. Roll the wheel to choose OFF, 1, 2 or 3 as appropriate and then push the
wheel or the left button.

OFF: Echo averaging OFF
1: Helps distinguish targets from sea clutter and suppress brilliance of

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

5. Push the right button to close the menu.

1. RADAR OPERATION

1-49

[TRAIL MENU]
1 TRAIL MODE

REL/TRUE/
2 TRAIL GRAD
SINGLE/MULTI
3 NARROW TRAIL*
OFF/ON
4 TRAIL LEVEL
1/2/3/4
5 TRAIL RESTART
OFF/ON
6 TRAIL COPY

OFF/ON
7 OS TRAIL
OFF/ON

1.28 Target Trails

The trails of the radar echoes of targets may be displ ayed in the form of
synthetic aftergl ow. Target trails are chosen either relative or true and may be
sea or ground stabilized. True motion trails require a compass signal and own
ship speed input .

1.28.1 True or relati ve tr ail s

You may di s play echo trails in true or relati ve mot ion (only true t r ail on TM).
Relative trails show r elative movements betw een targets and own ship. True
motion trails require a gyrocompass signal and own ship speed i nput to cancel
out own ship's movement and present true target movem ents in accor dance wit h
their over-the-ground speeds and courses.

(a) True target trails
(No smearing of
stationary targets)

(b) Relative target trails
Targets moving relative
to own ship

Target tr ails

Note: When true trail is selected on the RM mode, the TRAIL MODE box is

shown i n r ed. No true-relat ive selection on TM; it is only True trails on TM
mode.

1. Roll the trackbal l to place the arrow on the T RAIL MO DE box at the bottom
right corner of the screen and t hen push the right button to open the TRAIL
menu.

TRAIL menu

*: Non-IMO radar only

1. RADAR OPERATION

1-50

2. Roll the wheel to choose 1 TRAIL MODE and then push the wheel.

3. Roll the wheel to choose TRUE or REL appropriate and then push the wheel
or the left button.

4. Push the right button to close the menu.

Note: “TRUE TRAIL” is shown in red when a relative motion presentation mode

is used.

1.28.2 Trail time

Trail time, the trail plotting interval, may be chosen as follows:

1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom
right corner of the screen.

* TRAIL **

4

* = TRUE or REL
** = Trail time setting

TRAIL MODE box

2. Push the left button to choose plotting interval from among OFF, 15 s, 30 s, 1
min, 3 min, 6 min, 15 min, 30 min or CONT(INUOUS) and then push the
wheel. (To choose intervals between 30 s and 30 min, in increments of 30
seconds, roll the wheel.) The longer the trail interval the longer the length of
the target trail.
The maximum time for continuous plotting is 99:59. When the timer counts to
99:59, the timer is reset to zero, all target trails are erased and then trails are
restarted.

1.28.3 Trail gradation

•

The afterglow can be selected in a single tone or gradual shading.

Monotone

(Single)

Gradual shading

(Multi)

Trail gradation

1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom

right corner of the screen.

2. Push the right button to display the TRAIL menu.

3. Roll the wheel to choose 2 TRAIL GRAD and then push the wheel or the left

button.

4. Roll the wheel to choose SINGLE (single) or MULTI (multiple) as appropriate

and then push the wheel or the left button.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-51

1.28.4 Resetting target trails

You may clear all target trails to restart the trail process. Target trails are cleared
and the trailing process restarts from time count zero at the current target trail
plot interval.

1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom
right corner of the screen.

2. Push the right button to display the TRAIL menu.

3. Roll the wheel to choose 5 TRAIL RESTART and then push the wheel or the
left button.

4. Roll the wheel to choose ON or OFF as appropriate and then push the wheel
or the left button.
ON: Trails start extending on the newly selected range.
OFF: Trails are shown and extend only on the range where they were
initiated.

5. Push the right button to close the menu.

1.28.5 Trail copy

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

(a) Previous range

(b) New range

No trail generated
for target not within
previous range

Trail copy

1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom
right corner of the screen.

2. Push the right button to display the TRAIL menu.

3. Roll the wheel to choose 6 TRAIL COPY and then push the wheel or the left
button.

4. Roll the wheel to choose ON or OFF as appropriate and then push the wheel
or the left button.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-52

1.28.6 Trail level

The level ( intensity ) of the afterglow which extends fr om r adar targets m ay be
chosen as below.

1. Roll the trackball to place the arrow on the TRAIL MO DE box at the bottom
right corner of the screen.

2. Push the right button to display t he TRAIL menu.

3. Roll the wheel to choose 4 TRAIL LEVEL and then push the wheel or the left
button.

4. Roll the wheel to choos e level desired an d then push the wheel or the l eft
button. The higher the num ber the greater the intensi ty of the afterglow.

5. Push the right button to close the menu.

1.28.7 Narrow trails (non-IMO type only)

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

1. Roll the trackball to place the arrow on the TRAIL MO DE box at the bottom
right corner of the screen.

2. Push the right button to display t he TRAIL menu.

3. Roll the wheel to choos e 3 NA RROW TRAIL and t hen push the wheel or the
left button.

4. Roll the wheel to choos e ON or OFF as appropriate and then push the w heel
or the left button. Choose ON to get thinner t r ails.

5. Push the right button to close the menu.

1.28.8 Canceling trails

Trails can be canceled as follows:

By keyboard

Press the [CA NCE L TRAILS] k ey.

By trackball

1. Roll the trackbal l to place the arrow on the T RAIL MO DE box at the bottom

right corner of the screen.

2. Push the left butt on to display OFF.

1. RADAR OPERATION

1-53

1.29 Parallel Index Lines

Parallel index lines are useful for keeping a constant distance between own ship
and a coastline or a partner ship when navigating. Two index lines are available
and any two may be displayed. You may control the orientation and line interval.

Index
lines

Parallel index lines

1.29.1 Displaying, erasing parallel index lines

By keyboard

1. With the menu closed, press the [INDEX LINE] key. The guidance box shows
“DISP INDEX LINE/.”

2. While watching the IL (Index Line) box at the left side of the screen, press
and hold down the [INDEX LINE] key to activate or deactivate applicable
index line. Press down the key again to display (or erase) the index lin e
chosen.

Index line number

Status (ON or OFF)

IL 1

ON

032.0°T

5.60NM

Index line orientation,
Index line interval
(Neither shown when
Index line is OFF.)

IL (Index Line) box

By trackball

1. Roll the tr ackball to place the arrow in the IL box at the lower left-hand side of
the screen. (See the illustration above.)

2. Roll the wheel to choose index line number and then push the left butt on or
the wheel to turn the index line on or off as appropriate.

1. RADAR OPERATION

1-54

[MARK]
1 BACK

2 OWN SHIP MARK
OFF/ON
3 STERN MARK
OFF/ON
4 INDEX LINE BEARING
REL/TRUE
5 INDEX LINE
1/2/3/6
6 INDEX LINE MODE
VERTICAL/HORIZONTAL

8 EBL OFFSET BASE
STAB GND/STAB HDG/
STAB NORTH
9 EBL CURSOR BEARING
REL/TRUE
0 RING
OFF/ON

1.29.2 Adjusting index line orientation, index line interval

1. Display the in dex line for which you want to adjust its orientation, referring to
paragraph 1.29.1.

2. Roll the tr ackball to place the arrow in the
index line orientation setting window,
directly below the IL box.

3. Roll the wheel to adjust the index line orientation, between 000.0-359.9(°T).

Enter a negative value to move the index line to the opposite side of the
index line passing through the own ship position.

4. Roll the trackball to place the cursor in the index line interval sett ing window.

5. Roll the wheel to adjust the index line interval.

1.29.3 Index line bearing reference

Index line bearing reference may be relative to own ship’s heading (Relative) or
referenced to North (True) as follows:

1. Roll the tr ackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 2 MARK and then push the wheel or the left button
to display the MARK menu.

MARK menu

3. Roll the wheel t o choose 4 INDEX LINE BEARING and then push the wheel
or the left button.

4. Roll the wheel t o choose TRUE or REL as appropriate and then push the
wheel or the left button.

5. Push the right button twice to close the menu.

IL 1

ON

032.0°T

5.60NM

Indexlineorientation

Indexlineinterval

1. RADAR OPERATION

1-55

1.29.4 Choosi ng maxi mum number of index lines to displa y

The maximum number of index lines to display may be chosen from 2, 3 or 6
lines as below. The actual number of lines visible may be less depending on line
interval.

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 2 MARK and then push the wheel or the left button
to display the MARK menu.

3. Roll the wheel to choose 5 INDEX LINE and then push the wheel or the left
button.

4. Roll the wheel to choose 1, 2, 3 or 6 as appropriate and then push the wheel
or the left button.

5. Push the right button twice to close the menu.

1.29.5 Index line mode

Index lines orientation may be chosen from horizontal or vertical. This function is
available when 5 INDEX LINE in the MARK menu is set for other than “1”.

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 2 MARK and then push the wheel or the left button
to display the MARK menu.

3. Roll the wheel to choose 6 INDEX LINE MODE and then push the wheel or
the left button.

4. Roll the wheel to choose VERTICAL or HORIZONTAL as appropriate and
then push the wheel or the left button.

5. Push the right button twice to close the menu.

1. RADAR OPERATION

1-56

[MARK MENU]
1 ORIGIN MARK STAB

GND/SEA
2 MARK KIND
ORIGIN MARK(No.)/
ORIGIN MARK(SYM)/
MAP MARK/
WP 1~50/
WP 51~100/
WP 101~150/
WP 151~198/
OWN SHIP SHAPE

9 MAP DISPLAY
OFF/ON
0 MAP MARK COLOR*
RED/GRN/BLU/YEL/
CYA/MAG/WHT

1.30 Origin Mark

You can mark any prominent target or a point of particular interest using the
origin mark feature. Twenty origin marks may be entered: 10 standard origin
marks (with number) and one each of the 10 symbol origin marks. The marks
may be geographically fixed (ground stabilized) or sea stabilized. To display the
origin marks, heading signal and own ship positi on data are required.

1.30.1 Entering origin marks

1. Roll the tr ackball to choose the MARK box at the left side of the screen. The
guidance box now reads “MARK SELECT / MARK MENU.”

MARK



Mark type last
selected, mark
number

-> +

162.5

°

T 11.7 NM

Bearing and range from
own ship to mark

1

MARK box

2. Push the right button to open the MARK menu.

MARK menu

3. Roll the wheel t o choose 2 MARK KIND and then push the wheel or the left
button.

4. Roll the wheel to choose ORIGIN MARK(No.) or ORIGIN MARK(SYM) as
appropriate and then push the wheel or the left button. Choose ORIGIN
MARK(No.) to inscribe standard origin mark (

) plus mark number; ORIGIN

MARK(SYM) to inscribe desired origin mark symbol (no number).

5. Push the left button.

6. Push the right button to close the menu. The guidance box now reads
“MARK SELECT / MARK MENU.”

* Not available

on IMO radar.

1. RADAR OPERATION

1-57

7. With the cursor choosing the MARK box, roll the wheel to choose mark
number desired (“ORIGIN MARK(No.)” chosen at step 4) or origin mark
symbol (“ORIGIN MARK(SYM)” chosen at step 4) and then push the left
button. The following origin marks are available.

Origin mark (symbols)

8. Push the left button again. The cursor jumps into the effective display area
and the guidance box now reads “MARK / EXIT.”

9. Roll the trackball to place the cursor on the location desired.

10. Push the left button to inscribe the origin mark at the cursor location. The
bearing and range from the origin mark to the cursor location are shown just
below the MARK box.

MARK 4

-> +

162.5°T 11.7

NM

Bearing and range from
origin mark to cursor

1

Mark box, showing bearing and range from origin mark

•

To inscribe a different standard origin mark number or symbol origin mark,
repeat steps 7-10. (“ORIGIN MARK(No.)” or (“ORIGIN MARK(SYM)” should
be preselected as appropriate.)

•

To quit entering origin marks, push the right button when the guidance box
reads “MARK / EXIT.”

•

Origin mark data reads “- - -.-” when the cursor is placed outside the effective
display area.

1. RADAR OPERATION

1-58

[MARK MENU]

1 ORIGIN MARK STAB
GND/SEA
2 MARK KIND
ORIGIN MARK(No.)/
ORIGIN MARK(SYM)/
MAP MARK/
WP 1~50/
WP 51~100/
WP 101~150/
WP 151~198/
OWN SHIP SHAPE

9 MAP DISPLAY
OFF/ON
0 MAP MARK COLOR*
RED/GRN/BLU/YEL/

CYA/MAG/WHT

1.30.2 Origin mark stabilization

Origin marks may be geographically fixed (ground stabilized) or moving (sea
stabilized).

1. Roll the trackball to choose the MARK box.

2. Push the right button to open the MARK menu.

MARK menu

3. Roll the wheel to choose 1 ORIGIN MARK STAB and then push the wheel.

4. Roll the wheel to choose GND or SEA as appropriate and then push the
wheel or the left button.

5. Push the right button to close the menu.

1.30.3 Deleting individual origin marks

The procedure below shows how to delete individual origin marks. Note that
origin marks cannot be deleted collectively.

1. With the cursor inside the effective display area, roll the wheel to display

“MARK DELETE / EXIT” in the guidance box.

2. Roll the trackball to place the cursor on the origin mark you wish to erase.

3. Push the left button or the wheel to erase the mark.

4. To erase another mark, repeat steps 2 and 3.

5. To finish, push the right button when the guidance box reads “MARK

DELETE / EXIT.”

*: Not available

on IMO radar.

1. RADAR OPERATION

1-59

1.31 Zoom

The zoom function enlarges an area of interest as large as twice the normal
viewing size, in the text window. To use the zoom display, it must be turned on in
the DATA BOX menu. For further details, see paragraph 1.41.

Zoom is not available when the ARP target data setting is “LARGE” and the
navigation data is turned on.

1. With the cursor inside the effective display area, roll the wheel to display
“ZOOM / EXIT” in the guidance box.

2. Roll the trackball to choose the location to zoom.

3. Push the left button or the wheel. A circle inscribes the location zoomed and
the zoom display at the right side of the screen shows the zoomed picture.

Zoom area selected
with the cursor

Data Box

Zoom
Area

Zoom display
(Appears in box above
when nav data is turned
off.)

Zoom display

To quit the zoom display, push the left button when the guidance box reads
“ZOOM / EXIT.”

1. RADAR OPERATION

1-60

1.32 Markers

1.32.1 Heading marker and heading line

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

Temporarily erasing the heading line

To temporarily extinguish the heading line to look at targets existing dead ahead
of own ship, press the [HL OFF] key on the keyboard, or roll the trackball to
choose the HL OFF box at the bottom left corner of the display and then push
the left button. In addition to the heading line, the stern marker and all graphics
within the effective display are also erased. To redisplay the heading line, etc.,
release the key or the left button.

1.32.2 Stern marker

The stern marker, which is a dot-and-dash line, appears opposite to the heading
line. To display or erase this marker do the following:

1. Roll the trackball to choose the MENU box at the right side of the display and
then push the left button to display the MAIN menu.

2. Roll the wheel to choose MARK and then push the wheel or the left button to
show the MARK menu.

3. Roll the wheel to choose 3 STERN MARK and then push the wheel or the left
button.

4. Roll the wheel to choose OFF or ON as appropriate and then push the wheel
or the left button.

5. Push the right button twice to close the menu.

1.32.3 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.

1. RADAR OPERATION

1-61

1.32.4 Own ship symbol

The own ship symbol ( ) can be displayed or erased on the MARK menu. This
symbol is scaled to indicate the length and beam of the vessel. If the largest
dimension of the symbol gets smaller than 6 mm, the symbol will disappear and
own ship will be represented with a small dot or circle depending on the range in
use. Ship’s dimensions should be entered at installation.

1. Roll the trackball to choose the MENU box at the right side of the display and
then push the left button to display the MAIN menu.

2. Roll the wheel to choose MARK and then push the wheel or the left button to
show the MARK menu.

3. Roll the wheel to choose 2 OWN SHIP MARK and then push the wheel or the
left button.

4. Roll the wheel to choose OFF or ON as appropriate and then push the wheel
or the left button.

5. Push the right button twice to close the menu.

1. RADAR OPERATION

1-62

1.33 Automatic Picture Setup According to
Navigation Purpose

Every time your navigating environment or task changes, you must adjust the
radar, which can be a nuisance in a busy situation. Instead of changing radar
settings case by case, it is possible to assign the function keys to provide
optimum settings for often encountered situations.

The radar's internal computer offers several picture setup options to be assigned
to each function key for your specific navigating requirements. For instance, one
of the functions is assigned the buoy detecting function and labeled SHIP on the
on the PICTURE box. By choosing SHIP, the radar will be instantly set for
optimum detection of ships.

Four user-programmable setups are also provided (labeled
PICTURE1-PICTURE4), so that you may have the radar automatically adjusted
to those conditions which are not covered by the provided setup options.

Below are the preset picture setup options provided with this radar.

Picture setup options description

Label Description Label Description

NEAR Optimum setting for short range

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

FAR Optimum setting for long range

detection using a range scale of 6

nm or larger
NEAR
BUOY

Optimum setting for detecting
navigation buoys, small vessels and
other small surface objects at close
range

FAR
BUOY

Optimum setting for detecting

navigation buoys, small vessels

and other small surface objects at

long range
ROUGH
SEA

Optimum setting for rough weather
or heavy rain

SHIP Optimum setting for detecting

vessels
HARBOR Optimum setting for short range

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

COAST For coastal navigation using a

range of 12 nm or less

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

Adjusting these features from the PICTURE menu changes the original function
key settings. To restore the original settings for a particular picture setup option,
it is necessary to choose the default setting. For this reason, we recommended
that you use the user-programmable function sets when frequent adjustment of
the radar picture is necessary.

1. RADAR OPERATION

1-63

Picture setup options and default settings

1 INT

REJECT

2 ECHO
STRETCH

3 ECHO
AVERAGE

4 NOISE
REJ

5 AUTO
STC

6 AUTO
RAIN

7 VIDEO

CONTRAST
PICTURE 1 2 OFF OFF OFF OFF OFF 2-B
PICTURE 2 2 2 1 OFF OFF OFF 3-B
PICTURE 3 2 OFF 2 OFF ON OFF 2-B
PICTURE 4 2 OFF OFF OFF OFF 2 2-A
NEAR 2 OFF OFF OFF OFF OFF 3-B
FAR 2 2 3 OFF ON OFF 3-C
NEAR BUOY 2 1 1 OFF OFF OFF 3-B
FAR BUOY 2 2 3 OFF ON OFF 3-C
ROUGH SEA 2 OFF 2 OFF ON OFF 2-A
SHIP 3 2 OFF OFF OFF OFF 3-C
HARBOR 2 OFF OFF OFF OFF OFF 3-B
COAST 2 OFF OFF OFF OFF OFF 3-B

8 PULSE 9 CONDITION

P/L on

0.5 nm

P/L on

0.75 nm

P/L on

1.5 nm

P/L on 3
nm

P/L on 6
nm

P/L on
12-24 nm

Sea Cond. STC Range

PICTURE 1 S1 S1 S2 M1 M2 L 2 ±0
PICTURE 2 S1 S1 M1 M2 M3 L 2 ±0
PICTURE 3 S1 S1 S2 M1 M2 L 3 ±0
PICTURE 4 S1 S1 S2 M1 M2 L 2 ±0
NEAR S1 S1 S2 M1 M2 L 2 ±0
FAR S1 S1 M1 M3 L L 3 ±0
NEAR BUOY S1 S1 M1 M2 L L 2 ±0
FAR BUOY S1 S1 M1 M3 L L 3 ±0
ROUGH SEA S1 S1 S2 M1 M2 M3 4 ±0
SHIP S1 S1 M1 M2 M3 L 2 ±0
HARBOR S1 S1 S2 M1 M3 L 2 ±0
COAST S1 S1 M1 M2 M3 L 2 ±0

1.33.1 Choosi ng a picture setup option

You may choose a picture setup options as follows:

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

NEAR BUOY* 4

* Other indications:
NEAR, FAR, NEAR BUOY,
FAR BUOY, ROUGH SEA,
SHIP, HARBOR, COAST,
PICTURE 1 - PICTURE 4

PICTURE box

2. Push the left button to choose picture setup option desired.

1. RADAR OPERATION

1-64

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT (ENTERX3)

1.33.2 Restor i ng default pictur e setup options

Any of the radar functions programmed with the picture setup options may be
adjusted as desired. If you get lost in operation and want to restore the default
settings for a particular picture setup operation, do the following:

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

NEAR BUOY* 4

* Other indications:
NEAR, FAR, NEAR BUOY,
FAR BUOY, ROUGH SEA,
SHIP, HARBOR, COAST,
PICTURE 1 - PICTURE 4

PICTURE box

2. Push the left button to choose the picture setup option for which you want to
restore its default settings.

3. Push the right button to show the PICTURE menu.

PICTURE menu

4. Roll the wheel to choose 0 DEFAULT.

5. Push the wheel or the left button three times to restore default settings for the
picture setup selected. (If you are using the keyboard, press the [ENTER
MARK] key three times.)

6. Push the right button to close the menu.

1. RADAR OPERATION

1-65

[PICTURE MENU]
1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT(ENTERX3)

1.33.3 User-programmable picture setups

Four user-programmable picture setups are provided and they are labe led
PICTURE 1 – PICTURE 4 in the PICTURE box. You may program them as
below.

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

2. Push the left button to choose PICTURE 1, PICTURE 2, PICTURE 3 or
PICTURE 4, whichever you wish to set.

3. Push the right button to show the PICTURE menu.

PULSE menu

4. Set items 1-6 and 8 referring to the following paragraphs:
1 INT REJECT: 1.19 5 AUTO STC: 1.1
2 ECHO STRETCH: 1.26 6 AUTO RAIN: 1.18
3 ECHO AVERAGE: 1.27 8 PULSE: 1.15
4 NOISE REJ: 1.35

5. Roll the wheel to choose 7 VIDEO CONTRAST and then push the wheel or
the left button.

6. Roll the wheel to choose 1, 2, 3 or 4 (Dynamic Range) or A, B, C (Curve) as
appropriate and then push the wheel or the left button. Refer to the
description below and the illustration on t he next page.
1-4: Control dynamic range. 1 provides the widest dynamic range; 4 is the
narrowest dynamic range.
A: Mid-level in the curve is low, so this setting is suitable for suppressing rain
clutter.
B: Curve between A and C.
C: Mid-level in the curve is high, so this setting is suitable for detecting
distant targets.

1. RADAR OPERATION

1-66

[CONDITION MENU]
1 BACK

2 SEA CONDITION

1/2/3/4/5

3 ANT HEIGHT

5/7.5/10/15/20/
25/30/35/40/45/
more50m

4 STC RANGE

+00

5 db

7 db

9 db

11 db

4

3

2

1

C

B

A

PICTURE level

VIDEO SIGNAL level

* *

* Default

Video contrast settings

7. Roll the wheel to choose 9 [CONDITION] and then push t he wheel to show
the CONDITION menu.

CONDITION menu

8. Roll the wheel to choose 2 SEA CONDITION and then push the wheel or the
left button.

9. Roll the wheel to choose appropriate sea condition and then push the wheel
or the left button. The larger the number the rougher the sea state.

10. Roll the wheel to choose 3 ANT HEIGHT and then push the wheel or the left
button.

11. Roll the wheel to choose appropriate radar antenna height (abo ve the
waterline) and then push the wheel or the lef t button.

12. If necessary, roll the wheel to choose 4 STC RANGE, to adjust effective STC
range, and then push the wheel or the left butt on. The setting range is –10 t o
+10. The larger the number the longer the effective STC range becom es. Roll
the wheel to set and then push the wheel or the left button. (Note that the
keyboard cannot be used to enter the setting.)

13. Push the right button twice to close the m enu.

1. RADAR OPERATION

1-67

[CUSTOMIZE•TEST]

1 BACK
2 [DATA BOX]
3 [F1]
4 [F2]
5 [F3]
6 [F4]
7 [OPERATION]
8 [TEST]

[F1]

1 BACK
2 [ECHO]
3 [STD KEY]
4 [ARPA•AIS]
5 [OPERATION]

1.34 Programming Function Keys

Less-often used functions are provided in the menu. To avoid opening the
menus to set up the radar for a particular situation, function keys F1-F4 may be
assigned any of the functions shown in the CUSTOMIZE•TEST sub menu.

1.34.1 Activating a function key

To activate the function assigned to a function key, press the key to instantly set
the radar for the preset purpose. Further press the key to choose option.

Function key Default setting

F1 Interference Rejector
F2 Echo Stretch
F3 Auto Rain
F4 Heading Line Off

1.34.2 Programming the functions keys

Do the following to program the function keys.

1. Roll the trackball to choose the MENU box at the right side of the display and
then push the left button to display the MAIN menu.

2. Roll the wheel to choose 9 [CUSTOMIZE•TEST] and then push the wheel.

CUSTOMIZE•TEST menu

3. Roll the wheel to choose 3 [F1], 4 [F2], 5 [F3] or 6 [F4], whichever function
key you want to set, and then push the wheel or the left button. For example,
choose 3 [F1] and then push the left button.

F1 menu

1. RADAR OPERATION

1-68

[ECHO]

1 BACK
2
PICTURE/
IR
ES/
EAV/
NOISE REJ/
ANT SELECT/
PULSE LENGTH/
A/C SEA SELECT/
AUTO RAIN SELECT/
TUNE SELECT/
ANT HEIGHT/
SEA CONDITION/
2ND ECHO REJ/
PM/
SART/

[ARPA•AIS]

1 BACK
2
DISP ARP/
DISP AIS/
TARGET DATA & ACQ/
PAST POSN INTERVAL/
REF MARK/
CPA LIMIT/
CPA/
TCPA/
GZ1/
GZ2/
TARGET LIST SORT/
TRIAL MANEUVER/
ARP•AIS FUSION/
AIS MESSAGE

[STD KEY]

1 BACK
2
ALARM ACK/
STBY TX/
HL OFF/
EBL OFFSET/
MODE/
OFF CENTER/
CU TM RESET/
INDEX LINE/
VECTOR TIME/
VECTOR MODE/
TARGET LIST/
TRAIL/
BRILL/
MARK/
MENU/
RANGE UP/
RANGE DOWN/
ACQ/
TARGET DATA/
TARGET CANCEL

[OPERATION]

1 BACK
2
ECHO COLOR/
BACK COLOR/
RING/
ALARM1/
ALARM2/
WATCH ALARM RESET/
ZOOM/
MARK DELETE/
CHART ALIGN/
DISPLAY SELECT/
MOB/
USER DEFAULT/
TLL

4. Roll the wheel to choose appropriate category, ECHO, STD KEY, ARP•AIS or
OPERATION and then push the wheel or the left button. Refer to the menus
below to choose appropriate category.

Function key categories and options

1. RADAR OPERATION

1-69

5. Roll the wheel to choose “2” and then push the wheel or the left button.

6. Roll the wheel to choose function desired and then push the wheel or left
button.

7. Push the right button twice to close the menu.

Description of function key programs

Item Description

[ECHO]

PICTURE Chooses picture setup function.
IR Chooses interference rejection level.
ES Chooses echo stretch function.
EAV Chooses echo averaging function.
NOISE REJ Turns noise rejector on/off.
ANT SELECT Chooses antenna.
PULSE LENGTH Chooses pulselength.
A/C SEA SELECT Chooses A/C SEA adjustment method.
AUTO RAIN SELECT Chooses AUTO RAIN level.
TUNE SELECT Chooses tuning adjustment method.
ANT HEIGHT Sets antenna height.
SEA CONDITION Sets sea condition.
2ND ECHO REJ Turns 2nd trace echo rejector on/off.
PM Turns performance monitor on/off.
SART Turns SART setup conditions on/off.

[STD KEY]

ALARM ACK Acknowledges alarm. (Silences audible alarm.)
STBY TX Toggles between stand-by and transmit.
HL OFF Turns heading line on/off.
EBL OFFSET Offsets EBL.
OFF CENTER Off centers the display.
CU TM RESET Returns own ship mark to point 75% of range in use.
INDEX LINE Turns index line on/off.
VECTOR TIME Sets vector time.
VECTOR MODE Sets vector mode.
TARGET LIST Displays target list.
TRAIL Sets trail parameters.
BRILL Sets brilliance.
MARK Chooses mark to inscribe.
MENU Opens the MAIN menu.
RANGE UP Raises the range scale.
RANGE DOWN Lowers the range scale.
ACQ Acquires ARP target; activate sleeping AIS target.
TARGET DATA Shows target data.
TARGET CANCEL Cancels tracking of ARP target; sleep AIS target.

1. RADAR OPERATION

1-70

Description of function key programs (con’t)

Item Description

[ARP•AIS]

DISP ARP Activates/deactivates ARP.

DISP AIS Activates/deactivates AIS.

TARGET DATA & ACQ

ARP: Acquires ARP target; shows data for ARP target
selected.
AIS: Activates sleeping AIS target; shows data for AIS
target selected.

PAST POSN INTERVAL Chooses past position plotting interval.

REF MARK Inscribes reference mark (for target-based speed).

CPA LIMIT Turns CPA limit on/off.

CPA Enters CPA range.

TCPA Enters TCPA time.

GZ1 Sets Guard Zone 1.

GZ2 Sets Guard Zone 2.

TARGET LIST SORT Sorts target list.

TRIAL MANEUVER Executes trial maneuver.

ARP•AIS FUSION Converts ARP target to AIS target.

AIS MESSAGE Displays AIS message board.

[OPERATION]

ECHO COLOR Chooses echo color.

BACK COLOR Chooses background color.

RING Turns range rings on/off.

ALARM1 Sets no. 1 guard alarm.

ALARM2 Sets no. 2 guard alarm.

WATCH ALARM RESET Resets watch alarm.

ZOOM Enables zoom.

MARK DELETE Deletes mark (origin mark, waypoint mark, plotter mark).

CHART ALIGN Aligns chart with radar picture.

DISPLAY SELECT Chooses display mode.

MOB Inscribes MOB mark (WP 200).

USER DEFAULT Restores default settings.

TLL Outputs radar target’s L/L position to video plotter.

1. RADAR OPERATION

1-71

[OS POSN MENU]

1 NAV AID
GPS1/GPS2/
DEAD RECKONING
2 MANUAL L/L
00°00.00 N
000°00.00 W

1.35 Ship’s Position

Choose the source of ship’s position data as follows:

1. Roll the trackball to choose the OS POSN box at the top right corner of the
screen.

OS POSN 4

OS POSN box

2. Push the right button to show the OS POSN menu.

OS POSN menu

3. Roll the wheel to choose 1 NAV AID and then push the wheel or the left
button.

4. Roll the wheel to choose GPS1, GPS2 or DEAD RECKONING as
appropriate and then push the wheel or the left button.

GPS1: GPS Navigator connected to nav port
GPS2: GPS navigator connected to SPEED LOG port or TRACK CONTROL
port.

5. If you have chosen DEAD RECKONING go to step 6 to enter position
manually. For GPS1 or GPS2, go to step 7.

6. Roll the wheel to choose 2 MANUAL L/L and then push the wheel. Enter
latitude and longitude position as follows:

1) Roll the wheel to set appropriate digit in the latitude field and then push the

wheel. (You may push the wheel again to skip a place.) For keyboard
operation, press appropriate numeric keys and then press the [ENTER
MARK] key.

2) Set longitude similar to how you set latitude and then push the wheel. (For

keyboard operation, press the [ENTER MARK] key.)

Note: Co-ordinate polarity may be switched by rolling the wheel or pressing the

[2] key in case of keyboard operation.

7. Push the right button to close the menu.

Note: When the AIS function is active, DEAD RECKONING is shown in gray to

indicate that it is not available for selection.

1. RADAR OPERATION

1-72

[PICTURE MENU]

1 INT REJECT

OFF/1/2/3

2 ECHO STRETCH

OFF/1/2/3

3 ECHO AVERAGE

OFF/1/2/3

4 NOISE REJ

OFF/ON

5 AUTO STC

OFF/ON

6 AUTO RAIN

OFF/1/2/3/4

7 VIDEO CONTRAST

1/2/3/4/

A/B/C
8 [PULSE]
9 [CONDITION]
0 DEFAULT

(

ENTERX3

)

1.36 Noise Rejector

White noise may show itself on the screen as random “speckles” spread over the
entire radar image. You can remove this noise as follows:

1. Roll the trackball to choose the PICTURE box at the left side of the screen.

2. Push the right button to open the PICTURE menu.

PICTURE menu

3. Roll the wheel to choose 4 NOISE REJ and then push the wheel or the left
button.

4. Roll the wheel to choose ON or OFF as appropriate and then push the wheel
or the left button.

5. Push the right button to close the menu.

1. RADAR OPERATION

1-73

[ECHO]

1 BACK
2 2

ND

ECHO REJ

OFF/ON
3 TUNE INITIALIZE
4 PM

OFF/ON
5 SART
OFF/ON
6 WIPER

OFF/1/2

1.37 Suppressing Second-trace Echoes

In certain situations, echoes from very distance targets may appear as false
echoes (second-trace echoes) on the screen. This occurs when the return echo
is received one transmission cycle later, or after a next radar pulse has been
transmitted.

Second-trace
echo

Tx repetition

Actual range

False echo
range

Second-trace echoes

To reject second-trace echoes:

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 1 ECHO and then push the wheel or the left button
to open the ECHO menu.

ECHO menu

3. Roll the wheel to choose 2 2

ND

ECHO REJ and then push the wheel or the

left button.

4. Roll the wheel to choose OFF or ON as appropriate and then push the wheel
or the left button.

5. Push the right button twice to close the menu.

1. RADAR OPERATION

1-74

1.38 Adjusting Brilliance of Screen Data

You can adjust relative brilliance levels of various markers and alphanumeric
readouts displayed on the screen.

1. Roll the trackball to choose the BRILL box at the bottom left corner of the
screen and then push the right button to show the BRILL menu.

[BRILL1 MENU (2/2)]

1 BACK
2 BRG CURSOR
3 EBL
4 VRM
5 INDEX LINE
6 ARP SYMBOL
7 AIS SYMBOL
8 L/L GRID
9 MARK
0 CHART

Choose 0 NEXT
to show page 2
of the BRILL menu.

[BRILL1 MENU (1/2)]

1 ECHO COLOR
YEL/GRN/
WHT/COLOR*
2 BKGD COLOR
BLK-GRN/
BLK-RED/
BLU-CIR/
BLU/BRT-BLU
3 PANEL DIMMER
4 CHARACTER
5 CURSOR
6 ECHO
7 TRAIL
8 HL
9 RING
0 NEXT

* Not available
on IMO radar.

Note: Four brilliance and color sets are

provided. For further details see
paragraph 1.44.

BRILL menu

2. Roll the wheel to choose item you wish to adjust and then push the wheel or
the left button. (To go to the second page of the BRILL menu choose 0 NEXT
and push the wheel.)

Page 1 Page 2

Item Adjusts

brilliance of;

Item Adjusts

brilliance of;

1 ECHO COLOR See para. 1.49. 2 BRG CURSOR Bearing cursor
2 BKGD COLOR See para. 1.49. 3 EBL EBLs
3 PANEL
DIMMER

Backlighting of
control unit

4 VRM VRMs

4 CHARACTER All alphanumeric

characters

5 INDEX LINE Index lines

5 CURSOR Cursor (+) and

arrow

6 ARP

SYMBOL

ARP symbols

6 ECHO Radar echoes 7 AIS SYMBOL AIS symbols
7 TRAIL Target trails 8 L/L Chart grid
8 HL Heading line 9 MARK All marks
9 RING Range rings 0 CHART Chart

3. Roll the wheel to set brilliance level. The range of adjustment for items

except “HL” and “CURSOR” is 0-100%. The range of adjustment for HL and
CURSOR is 50-100%.

4. Push the right button once or twice to close the menu.

1. RADAR OPERATION

1-75

[ALARM]

1 BACK
2 TARGET ALARM MODE

IN/OUT
3 TARGET ALARM MODE
1/2/3/4
4 WATCH ALARM
OFF/6M/10M/
12M/15M/20M
5 ALARM SOUND LEVEL
LOW/MID/HIGH
6 [ALARM OUT1]
7 [ALARM OUT2]
8 [ALARM OUT3]
9 AUDIO ALARM
OFF/ON

1.39 Watch Alarm

The watch alarm sounds the audible alarm at the chosen time interval to help
you keep regular watch of the radar picture for safety or other purposes.

The WATCH box appears at the lower-left corner of the screen with a watch
alarm timer counts down from value set (for example, “12:00”).

WATCH

12:00

WATCH box

When a preset time interval has elapsed, the audible watch alarm is released,
the screen label WATCH turns red and the watch alarm timer freezes at “0:00.”
To silence the alarm, press the [ALARM ACK] key on the full keyboard or roll the
trackball to choose the ALARM ACK box and then push the left button. The label
WATCH turns to normal color and the watch alarm timer is reset to the initial
value and starts the count-down sequence again.

If you press the [ALARM ACK] key or click the box with the left button before the
selected time interval is reached, the watch alarm timer is reset to the initial
value and starts the count-down sequence again.

To set watch time interval:

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 3 ALARM then push the wheel or the left button.

ALARM menu

3. Roll the wheel to choose 4 WATCH ALARM and then push the wheel or the

left button.

4. Roll the wheel to choose appropriate time interval and then push the wheel or
the left button and then push the right button twice to close the menu.

1. RADAR OPERATION

1-76

[NAV DATA]

1 BACK
2 DEPTH
OFF/m/ft
3 DEPTH GRAPH SCALE
10/20/50/
100/200/500
4 DEPTH MARK

000m
5 CURRENT
OFF/ON
6 WIND
OFF/m/s/KT
7 TEMP
OFF/ON
8 DATE-TIME
OFF/UTC/LOCAL
9 LOCAL TIME ADJ
+00:00
0 WPT DATA
OFF/REL/TRUE

1.40 Setting Up Nav Data

Wind, depth, ocean current, water temperature, date and time and waypoint data
may be set up as follows:

1. Roll the trackball to choose the MENU box at the right side of the screen and
then push the left button.

2. Roll the wheel to choose 7 NAV DATA and then push left button to open the
NAV DATA menu.

NAV DATA menu

3. Choose appropriate options referring to the table on the next page for details.