Furuno 1954C-BB, 1964C-BB, GD-1920C-BB, 1834C-BB, 1934C-BB User Manual 2

...

SAFETY INSTRUCTIONS

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.

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

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

Use the proper fuse.

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

Keep heater away from equipment.

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

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 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.

MODEL

MODEL 1824C-BB

MODEL 1834C-BB

MODEL 1934C-BB

MODEL 1944C-BB

XN-12A

MODEL 1954CBB

XN-13A

XN-12A

MODEL 1964CBB

XN-13A

Warning Label

A warning label is attached to the equipment. Do not remove the label. If the label is missing or damaged, contact a FURUNO agent or dealer.

WARNING

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

exist are given in the

Distance to

100 W/m

point

Nil

Worst case

0.10 m

Nil

Worst case

0.20 m

Nil

Worst case

0.50 m

Worst case

0.40 m

Distance to

10 W/m

Worst case

0.70 m

Worst case

1.50 m

Worst case

1.70 m

Worst case

1.20 m

Worst case

2.00 m

Worst case

1.40 m

Worst case

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

point

5.40 m

3.60 m

2.9 Presentation Mode..........................2-6

FOREWORD ....................................vi

SYSTEM CONFIGURATION..........viii

1. OPERATIONAL OVERVIEW.. 1-1

1.1 Operating Controls..........................1-1

1.1.1 Control unit ..........................1-1

1.2 Inserting a Chart Card ....................1-3

1.3 Turning the Unit On/Off...................1-4

1.4 Adjusting Hue, Panel Illumination...1-5

1.5 Selecting a Display.........................1-6

1.5.1 Display modes .....................1-6

1.5.2 Selecting a display...............1-7

1.5.3 Switching control in

combination and overlay

screens ................................1-8

1.5.4 Selecting image source .......1-9

1.6 Trackball, Cursor...........................1-10

1.7 Entering the MOB Mark,

Setting MOB as Destination .........1-11

1.8 Data Boxes ...................................1-12

1.8.1 Showing, hiding data boxes

with soft key .......................1-12

1.8.2 Rearranging data boxes ....1-12

1.8.3 Temporarily erasing a

data box .............................1-12

1.9 Function Keys...............................1-13

1.10 Simulation Display ........................1-14

2. RADAR OPERATION ............. 2-1

2.1 Radar Display .................................2-1

2.2 Transmitting, Stand-by....................2-1

2.3 Tuning.............................................2-2

2.4 Adjusting the Gain ..........................2-2

2.5 Reducing Sea Clutter .....................2-3

2.5.1 How the A/C SEA works ......2-3

2.5.2 Adjusting the A/C SEA.........2-4

2.6 Reducing Precipitation Clutter........2-4

2.6.1 Adjusting the A/C RAIN .......2-4

2.7 Range Scale ...................................2-5

2.8 Pulselength .....................................2-5

2.10 Measuring the Range .....................2-8

2.11 Measuring the Bearing..................2-10

2.12

2.13 Reducing Noise Interference........2-11

2.14 Rejecting Radar Interference........2-11

2.15 Zoom.............................................2-12

2.16 Shifting the Picture........................2-14

2.17 Using the Offset EBL ....................2-15

2.18 Echo Trails ....................................2-17

2.19 Echo Stretch..................................2-19

2.20 Echo Averaging.............................2-20

2.21 Outputting TLL Data......................2-21

2.9.1 Selecting a presentation

mode....................................2-6

2.9.2 Description of presentation

modes ..................................2-7

2.10.1 Measuring range by

range rings...........................2-8

2.10.2 Measuring range by cursor..2-8

2.10.3 Measuring range by VRM....2-9

2.10.4 Various VRM operations......2-9

2.11.1 Measuring bearing by cursor....

........................................2-10

2.11.2 Measuring bearing by EBL .......

........................................2-10

2.11.3 Various EBL operations .....2-10

Erasing the Heading Line,

North Marker.................................2-11

2.15.1 Zooming radar targets .......2-12

2.15.2 Zooming ARP, TTM targets.......

........................................2-13

2.16.1 Manual shift........................2-14

2.16.2 Automatic shift ...................2-14

2.17.1 Predicting collision course.2-15

2.17.2 Measuring range & bearing

between two targets...........2-16

2.18.1 Trail time ............................2-17

2.18.2 Starting echo trails .............2-18

2.18.3 Trail gradation ....................2-18

2.18.4 Trail color ...........................2-18

2.18.5 Echo trail mode..................2-19

2.22 Guard Alarm............................... 2-22

2.22.1 Setting a guard alarm zone......

......................................... 2-22

2.22.2 When the alarm is violated…

......................................... 2-23

2.22.3 Cancelling the guard alarm......

......................................... 2-23

2.23 Watchman .................................. 2-23

2.23.1 How watchman works....... 2-23

2.23.2 Turning on/off watchman .. 2-23

2.23.3 Setting watchman stand-by

interval ............................. 2-24

2.24 Suppressing Second-trace Echoes....

................................................... 2-24

2.25 Waypoint Marker ........................ 2-25

2.26 ARP, TTM Operation .................. 2-26

2.26.1 Activating/deactivating

ARP, TTM......................... 2-27

2.26.2 Acquiring and tracking targets

(ARP) ............................... 2-27

2.26.3 Displaying target number

(ARP, TTM)....................... 2-29

2.26.4 Terminating tracking of ARP

targets .............................. 2-29

2.26.5 Setting vector attributes

(ARP) ............................... 2-30

2.26.6 Displaying past position

(ARP) ............................... 2-31

2.26.7 ARP, TTM target data ....... 2-31

2.26.8 CPA/TCPA alarm (ARP).... 2-32

2.26.9 Lost target alarm (ARP).... 2-33

2.27 Interpreting the Radar Display.... 2-34

2.27.1 False echoes.................... 2-34

2.27.2 SART (Search and Rescue

Transponder).................... 2-35

2.27.3 Racon (Radar Beacon)..... 2-36

3. PLOTTER OPERATION.........3-1

3.1 Plotter Displays ............................ 3-1

3.1.1 Full-screen plotter display... 3-1

3.1.2 Nav graphic display............ 3-3

3.1.3 Highway display ................. 3-6

3.1.4 Nav data display................. 3-7

3.2 Presentation Mode ....................... 3-8

3.3 Shifting the Display....................... 3-9

3.4 Chart Scale .................................. 3-9

3.5 Chart Cards ..................................3-9

3.5.1 Chart card overview ............3-9

3.5.2 Indices and chart enlarge-

ment..................................3-10

3.5.3 Navionics GOLD charts.....3-11

3.5.4 C-MAP charts....................3-14

3.6 Working with Track......................3-18

3.6.1 Displaying track.................3-18

3.6.2 Stopping, restarting plotting of

own ship track...................3-19

3.6.3 Changing track color.........3-19

3.6.4 Track plotting method and interval for own ship track .3-20

3.6.5 Changing own ship track/mark

distribution setting .............3-21

3.6.6 Erasing track.....................3-22

3.7 Marks, Lines ...............................3-23

3.7.1 Entering a mark, line .........3-23

3.7.2 Changing mark attributes..3-24

3.7.3 Selecting line type.............3-24

3.7.4 Erasing marks, lines..........3-25

3.8 Waypoints...................................3-26

3.8.1 Entering waypoints............3-26

3.8.2 Editing waypoint data........3-29

3.8.3 Erasing waypoints.............3-30

3.8.4 Changing waypoint mark size (Navionics GOLD charts) ..3-31

3.8.5 Searching waypoints.........3-32

3.9 Routes ........................................3-33

3.9.1 Creating routes .................3-33

3.9.2 Connecting routes.............3-36

3.9.3 Inserting waypoints ...........3-37

3.9.4 Removing waypoints from a

route .................................3-38

3.9.5 Erasing routes...................3-39

3.10 Navigation...................................3-39

3.10.1 Navigating to a “quick point”.....

.........................................3-39

3.10.2 Navigating to waypoints ....3-40

3.10.3 Navigating to ports, port services (Nav Chart™ only)

.........................................3-41

3.10.4 Following a route...............3-43

3.10.5 Canceling route

navigation .........................3-46

iii

3.11 Alarms...........................................3-47

3.11.1 Audio alarm on/off..............3-47

3.11.2 Arrival alarm.......................3-48

3.11.3 Anchor watch alarm...........3-49

3.11.4 XTE (Cross-Track Error)

alarm..................................3-50

3.11.5 Speed alarm.......................3-50

3.11.6 Proximity alarm..................3-51

3.11.7 Trip alarm...........................3-51

3.11.8 Grounding alarm

(C-MAP specification)........3-52

3.11.9 Alarm information...............3-53

3.12 Resetting T rip Distance ................3-55

4. VIDEO SOUNDER

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

4.1 Sounder Displays............................4-1

4.1.1 Selecting a sounder display.4-1

4.1.2 Description of sounder

displays................................4-2

4.1.3 Selecting screen split method in

combination displays ...........4-6

4.2 Automatic Sounder Operation ........4-6

4.2.1 How the automatic sounder

works....................................4-6

4.2.2 Ty pes of automatic sounder

modes..................................4-6

4.2.3 How to enable automatic

sounder oper ation................4-7

4.3 Manual Sounder Operation ............4-7

4.3.1 Selecting the manual mode.4-7

4.3.2 Selecting display range .......4-7

4.3.3 Adjusting the gain ................4-8

4.3.4 Shifting the range.................4-8

4.4 Measuring Depth, Time ..................4-9

4.5 Reducing Interference....................4-9

4.6 Reducing Low Level Noise...........4-10

4.7 Erasing Weak Echoes ..................4-11

4.8 White Marker ................................4-12

4.9 Picture Advance Speed ................4-12

4.9.1 Advancement independent of

ship’s speed.......................4-12

4.9.2 Advancement synchronized

with ship’s speed ...............4-13

4.10 Display Colors...............................4-14

4.11 Alarms...........................................4-15

4.11.1 Audio alarm on/off..............4-15

4.11.2 Bottom alarm .....................4-16

4.11.3 Fish alarm..........................4-16

4.11.4 Fish alarm (B/L) .................4-17

4.11.5 Water temperature alarm...4-17

4.11.6 When an alarm setting is

violated...............................4-18

4.12 Water Temperature Graph............4-19

4.13 Changing Pulse Repetition Rate ..4-19

4.14 Saving Sounder Picture to an SD Card

......................................................4-19

4.15 Interpreting the Sounder Display..4-20

4.15.1 Zero line.............................4-20

4.15.2 Bottom echo.......................4-20

4.15.3 Fish school echoes............4-21

4.15.4 Surface noise/Aeration ......4-21

5. AIS OPERATION .................... 5-1

5.1 Turning AIS Feature On/Off............5-1

5.2 AIS Symbols ...................................5-3

5.3 Setting Number of AIS Targets

to Display........................................5-3

5.4 Activating Targets............................5-4

5.5 Displaying Target Data....................5-4

5.6 Lost Target ......................................5-5

5-7 Setting CPA and TCPA ...................5-5

5.8 Proximity Alarm...............................5-6

5.9 Showing, Hiding AIS Target Tracks.....

........................................................5-7

5.10 Choosing Vector T ime.....................5-7

5.1 1 Displaying Past Positions of

AIS Targets .....................................5-8

6. DATA TRANSFER................... 6-1

6.1 Memory Card Operations ...............6-1

6.1.1 Deleting all data (other than chart data) from memory

cards ....................................6-1

6.1.2 Saving data to a memory

card......................................6-2

6.1.3 Playing back data from a

memory card........................6-3

6.2 Receiving Da ta Via Network

Equipment.......................................6-4

6.3 Outputting Data Through the

Network...........................................6-5

7. CUSTOMIZING YOUR UNIT... 7-1

7.1 General Setup.................................7-1

7.2 Radar Setup....................................7-4

7.2.1 Radar display setup.............7-4

7.2.2 Radar range setup...............7-7

7.2.3 Function key setup...............7-8

7.3 Plotter Setup.................................7-10

7.3.1 Navigation options .............7-10

7.3.2 Function key setup.............7-11

7.4 Chart Setup...................................7-13

7.4.1 Chart offset ........................7-13

7.4.2 Navionics GOLD

attributes............................7-14

7.4.3 C-MAP chart attributes ......7-15

7.5 Data Boxes Setup.........................7-21

7.6 Hot Page Setup ............................7-22

7.7 Navigator Setup............................7-23

7.7.1 Navigation data source......7-23

7.7.2 GPS receiver setup (Set equipped with

GP-310B/320B) .................7-25

7.7.3 TD display setup................7-28

7.8 Nav Data Display Setup................7-30

7.9 Sounder Setup..............................7-31

7.9.1 System setup.....................7-31

7.9.2 Sensor setup......................7-34

7.9.3 Sounding range, zoom range,

bottom lock range ..............7-35

7.9.4 Function key setup.............7-36

7.10 Nav Graphic Display Setup ..........7-38

chart

8. MAINTENANCE,

TROUBLESHOOTING .................. 8-1

8.1 Preventive Maintenance .................8-1

8.2 Replacement of Batteries ...............8-2

8.3 Replacement of Fuse......................8-2

8.4 Replacing the Magnetron ...............8-3

8.5 Replacing the Synchro Belt

(1824C-BB only) .............................8-3

8.6 Trackball Maintenance....................8-3

8.7 Simple Troubleshooting..................8-4

8.7.1 General ................................8-4

8.7.2 Radar ...................................8-4

8.7.3 Plotter...................................8-5

8.7.4 Sounder................................8-6

8.8 Diagnostics .....................................8-7

8.8.1 Memory I/O test ...................8-7

8.8.2 Test pattern ........................8-10

8.8.3 Keyboard test.....................8-11

8.9 GPS Status Display.......................8-12

8.10 Clearing Memories........................8-13

8.11 Error Messages.............................8-14

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

Menu Overview.....................................AP-1

Geodetic Chart Li st.............................AP-10

Icons ...................................................AP-1 1

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

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

Declaration of Conformity

FOREWORD

A Word to the Owner of the Model 18x4C-BB/19x4C-BB Series Marine Radar, GD-1920C-BB Color Video Plotter

FURUNO Electric Company thanks you for purchasing the Model 18x4C-BB/19x4C-BB Series Marine Radar, GD-1920C-BB Color Video Plotter. We are confident you will discover why the FURUNO name has become synonymous with quality and reliability.

For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for quality and reliability throughout the world. This dedication to excellence is furthered by our extensive global network of agents and dealers.

Your equipment is designed and constructed to meet the rigorous demands of the marine environment. However, no machine can perform its intended function unless properly installed and maintained. Please carefully read and follow the operation and maintenance procedures set forth in this manual.

We would appreciate feedback from you, the end-user, about whether we are achieving our purposes.

Thank you for considering and purchasing FURUNO.

Features

The 18x4C-BB/19x4C-BB Radar Series and the GD-1920C-BB Video Plotter work within our network system called the “NavNet.” Each product has an IP address to communicate with NavNet compatible products within the network, using TCP/IP protocol through an Ethernet 10BASE-T network.

The main features are as follows:

• This Navnet series consists of the following models:

Model Output Range

Marine Radar Model 1824C-BB 2.2 kW 24 nm

Marine Radar Model 1834C-BB 4 kW 36 nm 60 cm, radome, 24 rpm Marine Radar Model 1934C-BB 4 kW 48 nm 3.5 ft, open, 24 or 48 rpm Marine Radar Model 1944C-BB 6 kW 64 nm 4 ft, open, 24 or 48 rpm Marine Radar Model 1954C-BB 12 kW

72 nm

Marine Radar Model 1964C-BB 25 kW

Radar antenna size, type,

rotation speed

46 cm, radome, 24/30 rpm (auto-switching)

4/6 ft, open, 24 rpm (4 or 6 ft), 48 rpm (4 ft only)

Color Video Plotter GD-1920C-BB — — —

• User friendly operation with combination of discrete keys, soft keys, alphanumeric keys and Trackball.

• Accepts the following SD chart cards: Navionics GOLD charts or C-MAP NT charts depending on specification. All names mentioned above are registered trademarks of their respective companies.

• Fast chart redraw.

• Built-in NavNet interface circuit board.

• Video input (video recorder, CCD device, etc.) available with installation of optional PIP

Board.

• 12-channel GPS Receiver GP-310B with highly accurate position fixing optionally available, GP-320B with WAAS capability.

• User programmable function keys.

• Video sounder picture available with connection of the optional Network Sounder

ETR-6/10N or ETR-30N.

• The optional facsimile receiver FAX-30 receives facsimile pictures and navtex messages transmitted from facsimile and navtex stations.

/NT MAX

Notice

• No part of this manual may be copied or reproduced without written permission.

• If this manual is lost or worn, contact your dealer about replacement.

• The contents of this manual and equipment specifications are subject to change without

notice.

• The example screens (or illustrations) shown in this manual may not match the screens

you see on your display. The screen you see depends on your system configuration and equipment settings.

• This manual is intended for use by native speakers of English.

• FURUNO will assume no responsibility for the damage caused by improper use or

modification of the equipment or claims of loss of profit by a third party.

vii

SYSTEM CONFIGURATIONS

All NavNet products incorporate a “network circuit board” to integrate each NavNet product on board through an optional LAN cable (Ethernet 10BASE-T). Each NavNet product is assigned an IP address to enable transfer of images between other NavNet products. For example, video plotter pictures can be transferred to a radar and vice versa. Pictures received via the NavNet may be adjusted at the receiving end.

The number of processor units which may be installed depends on the number of network sounder connected. For a system incorporating three or more products, a “hub” is required to process data.

For one network sounder: one radar and three plotters, or four plotters For two network sounder: one radar and two plotters, or four plotters

Note: NavNet2 equipment cannot be connected to initial version NavNet equipment.

NavNet system (Model 18 24C-BB/1834C-BB/1934C-BB/1944C-BB/1954C-BB/ 1964C-BB)

MODEL

1964C-BB

MODEL

1954C-BB

Power Supply Unit

PSU-005

(MODEL 1954C-BB)

Power Supply Unit

PSU-008

(MODEL 1964C-BB)

ARPA ARP-11 (Built-in)

AIS transponder

: Standard : Option : Local supply

Antenna Unit

MODEL

1934C-BB

MODEL

1944C-BB

Control unit RCU-017

SAVESAVE

HIDEHIDE

CLEARCLEAR

MOBMOB

SHOWSHOW

GHIGHI

DEFDEF

ABCABC

2211

RANGERANGE

JKLJKL 44

STUSTU 77

POWERPOWER

TXTX

AIS Interface

ALARMALARM

DISPDISPEEMENUMENU

PQRPQR MNOMNO 55

GAINGAIN

YZ&YZ&

VWXVWX 88

EBLEBL _'#_'# 00

VRMVRM

PUSH TO ENTERPUSH TO ENTER

POWER

F.G.

321

GND

OUTPUT 12 VDC

NTSC/PAL

RGB OUT

OPTION

CARD SLOT

IF-1500AIS*

* Not required for AIS Transponder FA-150

Rectifier

RU-3423

100/110/115/220/230 VAC

12 - 24 VDC*

1φ, 50/60 Hz*

*: The power for the power supply unit and display unit must be drawn from the same power source.

MODEL1824C-BB

MODEL

1834C-BB

Processor unit

RPU-015

DATA 3

NETWORK

CONT DATA 1DATA 2

INPUT

12-24 VDC

3 GND

Facsimile

Receiver

FAX-30

ETR-6/10N

SLAVE DISPLAY

DJ-1

Network

Sounder

ETR-30N

GPS receiver

GP-310B/320B

Navigator Echo sounder

Monitor (Local supply)

Heading sensor

Other NavNet system (GD-1920C-BB, etc.)

NavNet system (M odel 1824C-BB/1834 C-BB/1934C-BB/1944C-BB/1954C-BB/1964C-BB)

viii

Singl e- unit NavNet system (GD-1920C-BB)

GPS receiver

GP-310B/320B

AIS transponder

Other NavNet Unit

(Model 1834C, etc.)

Facsimile

Receiver

FAX-30

* Not required for AIS Transponder FA-150.

AIS Interface IF-1500AIS*

Remote Controller RMC-100

Display unit

RDP-149

POWER

F.G.

321

GND

OUTPUT

12 VDC

NTSC/PAL

RGB OUT

OPTION

INPUT

12-24 VDC

GND

CARD SLOT

Network

Sounder

ETR-6/10N

ETR-30N

NETWORK

SLAVE DISPLAY

DJ-1

DATA 3

CONT DATA 1DATA 2

12 - 24 VDC

External buzzer

VGA monitor Remote display PC Video equipment

ARPA

ARP-11

Echo sounder Navigator

Rectifier

PR-62

: Standard : Option : Local supply

100/110/115/220/230 VAC 1φ, 50/60 Hz

Single-unit NavNet system (GD-1920C-BB)

Two-unit NavNet system

Radar Antenna Unit

GPS Receiver GP-310B/320B

RADAR

PLOTTER

Radar, plotter data

Two-unit NavNet system

Three-or-more-unit NavNet system (Max. 4 units)

Radar Antenna Unit

GPS Receiver GP-310B/320B

Radar Antenna Unit

GPS Receiver GP-310B/320B

RADAR

PLOTTER

Radar, plotter data

Radar Antenna Unit

GPS Receiver GP-310B/320B

RADAR

PLOTTER

Sounder data

Network Sounder

ETR-6/10N

ETR-30N

(option)

Radar data

Facsimile data

HUB

Facsimile

Receiver

FAX-30

(option)

Plotter data

RADAR

PLOTTER

Sounder data

Network Sounder

ETR-6/10N

ETR-30N

(option)

Three-or-more-unit NavNet system

1. OPERATIONAL OVERVIEW

This chapter provides the basic information needed to get you started using your radar, video plotter.

1.1 Operating Controls

1.1.1 Control unit

The radar, video plotter, sounder and chart systems are operated with the control unit. Ten keys are labeled and they provide the function shown on their labels. The five soft keys provide various functions according to current operating mode. The ENTER knob mainly functions to register selections on the menu and adjust the EBL, VRM and gain. The Trackball’s main function is to move the cursor across the screen. When you correctly execute an operation, the unit generates a beep. Invalid operation causes the unit to emit three beeps.

Clears data; erases selected mark.

Opens/closes alarm menu.

Enter alphanumeric

Selects a range.

data.

RANGERANGE

POWERPOWER

TXTX

DEFDEF

ABCABC

2211

JKLJKL

MNOMNO

STUSTU

VWXVWX

_'#_'#

Displays soft keys for EBL/VRM.

Radar: Displays soft keys for adjustment of gain, A/C SEA, A/C RAIN.

Sounder: Adjusts gain.

Long press: Turns power off. Momentary press: Turns power on, and

shows D: RADAR STBY/TX soft key.

Displays mode selection window.

Momentary press:

Registers own ship's position as a waypoint.

Press three seconds:

Marks man overboard position.

Shows or hides the soft keys, function keys, nav data alternately.

SAVESAVE

CLEARCLEAR

GHIGHI

ALARMALARM

PQRPQR

GAINGAIN

YZ&YZ&

EBLEBL VRMVRM

HIDEHIDE

MOBMOB

SHOWSHOW

DISPDISPEEMENUMENU

PUSH TO ENTERPUSH TO ENTER

Soft keys

Opens/closes the main menu.

Trackball*

Shifts cursor EBL/VRM and cursor; selects menu items and options.

ENTER knob Push: Registers setting. Rotate: Adjusts gain, VRM, EBL, etc.;

selects menu items and options. May also be used to enter alphanumeric data.

*: When it has been some time since the trackball was last operated, the cursor may not track the movement of the trackball. In this case, move the trackball rapidly and then finely.

How to remove the hard cover

Place your thumbs at the locations shown with circles in the illustration at right, and then lift the cover while pressing it with your thumbs.

1-1

1. OPERATIONAL OVERVIEW

Soft keys

The function of the five soft keys (labeled A, B, C, D and E) changes according to the operation. Their labels for their current functions are shown on the screen to the left of the keys. To hide or show the soft keys, press the HIDE/SHOW key. Each press of the key shows preset soft keys, user function keys or turns off navigation information (at the top of the screen).

Some soft keys show the current setting of a soft key in reverse video as shown below.

3nm

12/

H-UP

319. 9

Currently selected option shown in reverse video

Radar Display

TRAIL

OFF

TRAIL

TIME

GRAD

SINGLE

TRAIL

COLOR

RETURNE

359.9 ˚R

11.70

34° 22. 3456'N 359.9°M 080° 22. 3456'E

16.0nm

WP-002

FISH

Radar and plot ter display s

19.9 kt 99.9 nm

BRIDGE

Plotter Display

TRIP

MARK ENTRY

MODE

NTH UP

NAV

POS

D. BOX

OFF

1-2

1. OPERATIONAL OVERVIEW

1.2 Inserting a Chart Card

Your unit reads SD cards, in the following form ats: Navionic s GOLD charts or C- MAP NT+/ NT MAX c har ts, depending on the type of processor unit you have. I ns er t the appropriat e chart card for your area as follows:

1. Open the chart drive.

Chart drive

Processor unit

2. Insert desired chart label side up, before turning on t he power.

3. Close the lid.

To remove ch ar t c ar d, foll ow t he s teps show n below.

1. Press the MENU key to s how the menu.

2. Press the SHOW/HIDE key.

3. Open the chart drive li d, and then push the c ar d once and then pull it out.

Note 1: Do not remov e a c ard while the chart is being draw n. This may cause the equipment to freeze.

Note 2: Do not insert or remov e a c ar d while the power is on. This may c aus e t he equipment to freeze.

Note 3: For multipl e pr oc es s or units, do not us e the same chart c ar d t ype in more than one processor unit.

Note 4: Remove the card with care; r ough handling can damage the c ar d and destroy its contents.

1-3

1. OPERATIONAL OVERVIEW

1.3 Turning the Unit On/Off

Press the POWER/TX key to turn the unit on. A beep sounds and then the equipment shows the startup NavNet screen (about 20 seconds), the product information screen, startup test results and chart usage disclaimer. During this period the equipment is inoperative. The startup test checks the ROM, RAM, internal battery and backup data for proper operation, displaying the results for each as OK or NG (No Good). If NG appears an appropriate message appears on the screen. For any NG, try to press any key to go to the chart disclaimer screen, then perform the diagnostic test as shown in the paragraph “8.8 Diagnostics.”

For start up with t he radar display, the magnetron takes from one and thirty seconds minute to three minutes (depending on radar model) to warm up before the radar can be operated. The time remaining for warming up of the magnetron is counted down at the center of the display.

You may press any key at the chart disclaimer screen to show the last-used display, or wait several seconds to let the equipment do it for you.

To turn the unit off, press and hold down the POWER/TX key until the screen goes off (approx. 3 sec.). Note that the network sounder will be turned off approx. three minutes after turning off the power. This is due to the equipment’s electrical characteristics.

Note: The first time you turn on the power (or any time the power is applied after a memory reset), you are asked if you want to start the simulation mode, which provides simulated operation of the equipment after the installation mode selection. Push the ENTER knob to start the simulation mode, or press the CLEAR key to start normal operation. For further details about the simulation mode, see the paragraph “1.10 Simulation Display.”

1-4

1. OPERATIONAL OVERVIEW

1.4 Adjusting Hue, Panel Illumination

You may choose the colors for the radar plotter, and overlay displays, and adjust panel brilliance.

1. Press the POWER/TX key momentarily. A set of soft keys for adjustment of brilliance

and hue appear.

3nm

12/

H-UP

319. 9

BRILL CONTST

34° 22. 3456'N 359.9°M TRIP NU 080° 22. 3456'E

16.0nm

PANEL

BRILL

HUEC

RADAR

STBY

RETURNE

359.9 ˚R

11.70

(Blank label of softkey is not used)

WP-002

FISH

Radar Display

Brillianc e adjustment soft key s

2. Press the C: HUE soft key to show the hue setting window.

HUE

▲

{ DAY { NIGHT { TWILIGHT ~ MANUAL SET

▼

19.9 kt 99.9 nm

BRIDGE

(Blank label of softkey is not used)

Plotter Display

BRILL CONTST

PANEL

BRILL

HUEC

RADAR

STBY

RETURNE

Hue window

3. Operate the Trackball to select hue desired, referring to the table below. MANUAL SET

follows the color settings on the CHART DETAILS menu for the plotter and the RADAR DISPLAY SETUP menu for the radar.

Night Day Twilight

Characters Red Black Green Radar ring Red Green Green Radar echo Orange Multi Yellow Background Black White Blue Landmass (plotter) Orange* Light-orange* Orange*

* = Beige and light-beige on C-MAP display unit.

Note: When using the overlay screen, the own ship track will be hidden if the radar background and own ship track are blue and the “MANUAL SET” hue setting is used. In this case, set HUE to other position and then return to “MANUAL” to show the own ship track in black.

1-5

1. OPERATIONAL OVERVIEW

4. Press the B: PANEL BRILL soft key to show the panel brilliance window. The bar graph shows current panel brilliance setting.

PANEL BRILLIANCE

Panel brilliance setting window

5. Adjust the ENTER knob, clockwise to raise the brilliance or counterclockwise to lower it.

6. Hit the E: RETURN soft key to finish.

1.5 Selecting a Display

1.5.1 Display modes

If you have a radar, navigator, network sounder and external video source (video recorder, etc., optional PIP board required) six full-screen displays are available: radar, plotter, echo sounder, nav data, overlay, and external video. In addition to the full-screen display, you can divide the screen into halves and thirds to show two and three sets of images on a combination display.

Full screen Combination screen Overlay screen (radar) (radar + plotter)

(plotter + radar only, Requires L/L data)

Display screens

The table below shows the displays available with each screen type.

Screen type a nd available display scr een

Full screen Combination screen options

(half- or thirds-screen)

Plotter, radar, sounder, nav data, external video, overlay

Plotter, radar, sounder, compass (or wind), highway, compass (or wind)/highway, nav data, overlay, external video

Overlay screen options

Radar + plotter

1-6

1. OPERATIONAL OVERVIEW

1.5.2 Selecting a display

1. Press the DISP key to show the display screen selection window. The icons of modes

not available are shaded. HOTPAGE 1-HOTPAGE 6 are user-arrangeable displays called “hot pages,” which you can configure as you like. For further details, see the paragraph “7.6 Hot Page Setup.”

Selected item

RADAR PLOTTER SOUNDER NAV DATA OVERLAY EXT VIDEO WX FAX

HOTPAGE 1 HOTPAGE 2 HOTPAGE 3 HOTPAGE 4 HOTPAGE 5 HOTPAGE 6

· TURN KNOB TO SELECT MODE AND PUSH KNOB TO ENTER.

· PUSH ANY SOFT KEY TO SELECT IMAGE SOURCE.

Basic display screens

Hot pages

Display screen selection window

Note: “WX FAX” is available only when the facsimile receiver FAX-30 is connected. If the message “AUX SOURCE IS DISCONNECTED. PUSH ENT KNOB TO EXIT.” appears, press the ENTER knob and select other item.

2. Rotate the ENTER knob to select a basic display screen or a hot page screen.

3. Push the ENTER knob.

4. If you select a basic display screen, a group of appropriate combination displays appear. In the example below, the radar combination screens are shown. When WX FAX is selected at step 2, a combination display does not appear.

PUSH ENTER KNOB.

RETURN

Radar combination screen selection window

5. Rotate the ENTER knob to select display desired.

6. Push the ENTER knob to finish.

1-7

1. OPERATIONAL OVERVIEW

1.5 .3 Switchin g control in com bination and overlay scree ns

A soft key is provided in relevant combination and overlay screens to switch control between displays. In the example below, the E: PLOTTR CNTRL and E: SNDR CNTRL soft keys enable switching control between the plotter and sounder screens in the plotter/sounder combination display.

34° 22. 3456’N 359.9°M TRIP NU 080° 22. 3456’E

16.0nm

WP-002

19.9 kt 99.9 nm

FISH

Plotter display selected

CNTRL

PLOTTR

To adjust sounder

34° 22. 3456’N 359.9°M TRIP NU

080° 22. 3456’E

16.0nm

19.9 kt 99.9 nm

0’33"

40.0

0’33"

40.0

100

150

200

CNTRL

SNDR

To adjust plotter

MARK ENTRY

MODE

NTH UP

NAV

POS

CNTRL

PLOTTR

SHIFTA

MODEB

FREQ

WP-002

FISH

Sounder display selected

100

150

200

DISPLAY

MODE

LF/HF

CNTRL

SNDR

How to swi t c h c ontrol between modes in the plotter/sounder c ombination display

1-8

1. OPERATIONAL OVERVIEW

1.5.4 Selecting image source

When more than one network radar or network sounder is connected to the equipment, you may select an image source for each as shown below. This is not necessary when only one network radar or network sounder is connected.

1. Press the DISP key.

2. Press any soft key to show the following display.

▲

RADAR SOURCE1 (HOST NAME: NAVNET-1) SOUNDER SOURCE AUX SOURCE AUX 1 (HOST NAME: WXFAX) IP ADDRESS 172.031.003.003 DEVICE NUMBER 1 (HOST NAME: NAVNET-1)

ETR1 (HOST NAME: SOUNDER)

IF THERE IS MORE THAN ONE NETWORK RADAR OR ECHO SOUNDER, YOU MAY SELECT THE IMAGE SOURCES FOR DISPLAY.

SELECT SOURCE

EDIT

RETURN

Select source menu

3. Use the Trackball to select RADAR SOURCE, SOUNDER SOURCE or AUX SOURCE as appropriate, then press the A: EDIT key.

RADAR SOURCE

▲

1 (NAVNET1)

{

2 (NAVNET2)

{

3 (NAVNET3)

{

4 (NAVNET4)

▼

Radar source

SOUNDER SOURCE

▲

ETR0 (SOUNDER)

{

ETR1 (SOUNDER1)

{

ETR2 (SOUNDER2)

{

ETR3 (SOUNDER3)

{

ETR4 (SOUNDER4)

{

ETR5 (SOUNDER5)

{

ETR6 (SOUNDER6)

{

ETR7 (SOUNDER7)

{

ETR8 (SOUNDER8)

{

ETR9 (SOUNDER9)

▼

Sounder source

AUX SOURCE

▲

AUX1 (WXFAX)

{

AUX2 (WXFAX1)

{

AUX3 (WXFAX2)

{

AUX4 (WXFAX3)

▼

Aux source

Radar source and sounder source windows

4. Use the Trackball choose source name:

5. Push the ENTER knob to set.

6. Press the DISP key to finish.

7. Turn the power off and on again.

1-9

1. OPERATIONAL OVERVIEW

1.6 Trackball, Cursor

The Trackball functions to shift the cursor, for measurement of range and bearing to a location (radar) and latitude and longitude position (plotter). Roll the Trackball to shift the cursor. The cursor moves in the direction of Trackball rotation.

Cursor

3nm LP

12/ H-UP

319. 9

SIGNAL

PROC.

RADAR

DISPLY

NAV

FUNC

TARGETD

ZOOM &

D. BOX

Cursor data L/L position, Range and bearing from own ship to cursor

Cursor

Radar Display

34° 22. 3456'N 272.4°M

080° 22. 3456'E

15.9 nm 99.9 nm

16.0nm

WP-002

FISH

BRIDGE

359.9 ˚R

11.70

Cursor Data Bearing from own ship to cursor Range from own ship to cursor

TRIP

MARK

ENTRY

MODE

NTH UP

CENTERC

GO TO

CURSOR

D. BOX

OFF

1-10

Plotter Display

Cursor, cursor data

1. OPERATIONAL OVERVIEW

1.7 Entering the MOB Mark, Setting MOB as

Destination

The MOB mark functions to mark man overboard position. You can inscribe the mark from any mode except nav data, when playing back data or conducting any test. Note that this function requires position data.

Note: The function of the SAVE/MOB

Range, bearing

Man overboard

Current

position

key depends on the setting of SAVE MOB KEY FUNCTION in the GENERAL SETUP menu. The description below shows the procedure using the default

MOB concept

setting. For further details, see Save MOB Key Function on page 7-2.

1. Press and hold down the SAVE/MOB key for about three seconds when someone falls overboard. The display shows the waypoint number being saved (youngest empty waypoint number, 001-999) followed by the MOB confirmation window. Time remaining is counted down while pressing the SAVE/MOB key.

MOB mark

M O

MOB Data Box Bearing and range to MOB position

(MOB)

162.5°

0.49 nm

WAYPOINT SAVED!

XXXWPT CONTINUE PUSHING FOR MOB!

XXX = Waypoint number

CONTINUE PUSHING FOR MOB!

XX SEC

XX = Time remaining is counted down.

MAN OVER BOARD! GO TO MOB? YES ... PUSH ENTER KNOB NO ... PUSH CLEAR KEY

MOB mark messages

2. Push the ENTER knob to select the MOB position as the destination, or press the CLEAR key to only mark current ship’s position as a waypoint. If you select the MOB

position as destination;

• A full-screen radar, plotter or overlay appears depending on the display in use. (If the

MOB key function is “MOB Without Confirmation” the range is automatically set to

0.5 nm.) Further, the waypoint marker appears on the radar display.

• The MOB mark “MOB” appears at the MOB position and a blue line runs between it

and current position. This line shows the shortest course to the MOB position.

• Range and bearing to the MOB position are shown in the MOB data box.

To erase an MOB mark from the plotter display, you must first erase its corresponding waypoint. Place the cursor on the MOB mark, then press the CLEAR key followed by pushing the ENTER knob to erase the waypoint. Then, repeat to erase the MOB mark.

1-11

1. OPERATIONAL OVERVIEW

1.8 Data Boxes

Data boxes, providing navigation data, may be shown on any full-screen display. Up to six data boxes (two in case of large characters) may be shown, and the default data boxes are position (in latitude and longitude), course over ground, speed over ground and trip log. The user may choose which data to display, where to locate it, and show or hide it as desired. In addition, data boxes may be set independently for each display mode (plotter, radar, sounder). For how to select data for the data boxes, see the paragraph “7.5 Data Boxes Setup.”

Data boxes

3nm

12/

H-UP

TRIP LOG

177

47°58.535'N

36.496'W

122

319. 9°

SIGNAL

PROC.

RADAR

DISPLY

NAV

FUNC

TARGETD

COG

323.6

SOG

20.0

ZOOM &

D. BOX

359.9 ˚R

11.70

Data boxes

34° 22. 3456'N 359.9°M 080° 22. 3456'E

16.0nm

WP-002

TRIP LOG

FISH

177

47°58.535'N

36.496'W

122

Radar Display

Data box es

1.8.1 Showing, hiding data boxes with soft key

Plotter: E: D. BOX ON/OFF Radar: E: ZOOM & D. BOX

→ D: D. BOX ON/OFF (EBL/VRM data box, cursor data

box also shown/hidden) Sounder: B: AUTO/D. BOX

→A: D. BOX ON/OFF

1.8.2 Rearranging data boxes

COG

323.6

19.9 kt 99.9 nm

SOG

20.0

Plotter Display

TRIP

MARK

ENTRY

MODE

NTH UP

NAV

POS

D. BOX

ON /

OFF

You may select the location for data boxes as follows:

1. Using the Trackball, place the cursor inside the data box you wish to move. As the cursor enters the box it changes to a “hand”. Push the ENTER knob, and the hand changes to a fist, meaning the box is correctly selected.

2. Use the Trackball to move the data box to the location desired, then push the ENTER knob.

1.8.3 Temporarily erasi ng a data box

If a data box is obscuring a desired object, you may temporarily erase the box. Use the Trackball to place the cursor inside the data box you wish to erase, then press the CLEAR key. To redisplay the box, press the D. BOX soft key twice to display it.

1-12

1. OPERATIONAL OVERVIEW

1.9 Function Keys

The function keys provide for one-touch execution of a desired function. The default function key settings are as shown in the table below.

Function

Key

Radar Plotter Sounder

Default Setting, Key Label

#1 Heading line on/off, HL Track on/off, TRK TLL output, TLL #2 Rings on/off, RNG Edit mark/line, EML Clutter, CLT #3 Echo trail, TRL Ruler, RUL Signal level, SLV #4 Offcenter, OFC

Add new waypoint,

Noise limiter, NL

ADD

#5 STBY/TX, TX

Waypoint

Picture advance, PA

alphanumeric list, ALP

Executing a function

1. Press the HIDE/SHOW key to replace the preset soft key labels with the function key

labels.

3nm

12/

H-UP

319. 9

N G

Function

keys

F T

34° 22. 3456'N 359.9°M

080° 22. 3456'E 19.9 kt 99.9nm

16.0 nm

002WP

FISH

BRIDGE

TRIP

T R K

E M L

R U L

A D D

A L P

Function keys

359.9 ˚R

11.70

Radar Display

Plotter Display

Function k eys

2. Press function key desired.

Note: Function keys can be individually programmed for the plotter, radar and sounder displays. For further details see the following:

Radar: paragraph 7.2.3 Plotter: paragraph 7.3.2 Sounder: paragraph 7.9.4

1-13

1. OPERATIONAL OVERVIEW

1.10 Simulation Display

The simulation display, for use by service technicians for demonstration purposes, provides simulated operation to help acquaint you with the many features your unit has to offer. It allows you to view and control a simulated plotter, radar and sounder picture, without position-fixing equipment, network radar or a network sounder. Most controls are operative, thus you may practice setting destination, enter waypoints, measure range and bearing to a target, etc. Three simulation displays are provided for both the radar and echo sounder.

The simulation icon (SIM) appears when any simulation mode is active.

To start the simulation display;

1. Press the MENU key.

2. Press the E: SYSTEM CONFIGURATION, C: SYSTEM SETUP and D: SIMULATION SETUP soft keys in that order.

SIM

RADAR LIVE PLOTTER LIVE SOUNDER LIVE SPEED 00.0kt

00.000'W

COURSE 000.0 LATITUDE 45°35.000'N LONGITUDE 125 START DATE & TIME 00:00 24.NOV.01

GET RADAR SIMULATION DATA

SETUP

EDITA

RETURNE

Simulation setup menu

3. Follow appropriate procedure on the next several pages. To stop the simulation mode and return to normal operation, choose LIVE for radar, sounder or plotter.

Radar

NavNet processor unit-generated echoes or user data

1. Select RADAR, then press the A: EDIT soft key.

RADAR

▲

BUILT IN DATA 1

BUILT IN DATA 2

USER DATA

LIVE

▼

2. Select BUILT IN DATA 1 or 2 for internally generated echoes or USER DATA for user-saved radar data. Push the ENTER knob.

3. Press the MENU key to close the menu.

1-14

1. OPERATIONAL OVERVIEW

PLOTTER

▲

SIMULATION

LIVE

▼

NavNet radar antenna-generated echo es (not available with the GD-1920C-BB)

1. Select GET RADAR SIMULATION DATA, then press the A: EDIT soft key.

2. Select YES, then push the ENTER knob to erase simulation data and get new data. The

message “Now getting demo data. Do not turn off processor unit.” appears while the unit is receiving radar data.

Note: If the network radar could not be found “Radar source is not found. Cannot get demo data.” appears. And if the radar is not active, the message “Radar is not active. Cannot get demo data.” is displayed. Check that the radar is plugged in and its signal cable is firmly fastened.

3. Select RADAR, then press the A: EDIT soft key.

4. Select SIMULATION 2, then push the ENTER knob.

5. Press the MENU key to close the menu.

Plotter

1. Select PLOTTER, then press the A: EDIT soft key.

2. Select SIMULATION, then push the ENTER knob.

3. Select SPEED, then press the A: EDIT soft key.

4. Enter speed (setting range, 0-99 kt, default speed, 0 kt) with

the alphanumeric keys, then push the ENTER knob.

5. Select COURSE, then press the A: EDIT soft key.

6. Select “8 FIGURE” to trace the simulated ship’s track in a figure-eight course, or enter your own course at DIRECTION. To enter course, use the Trackball to select digit, and enter value with the alphanumeric keys.

7. Press the C: ENTER soft key.

8. Select LATITUDE, then press the A: EDIT soft key.

9. Enter latitude (setting range, 85

N-85°S, default setting, 45°35.000’N), then push the

ENTER knob.

10. Select LONGITUDE, then press the A: EDIT soft key.

11. Enter longitude (setting range, 180

E-180°W, default setting, 125°00.000’W), then push

the ENTER knob.

12. Select START DATE & TIME, then press the A: EDIT soft key.

13. Enter start date and time, then push the ENTER knob.

14. Press the MENU key to close the menu.

Sounder

1. Select SOUNDER, then press the A: EDIT soft key.

2. Select BUILT IN DATA (internally generated echoes) or ETR (network sounder-generated echoes), then push the

ENTER knob.

Note: The depth, shift, bottom-zoom, bottom-lock and

bottom discrimination cannot be shown in the BUILT IN

SOUNDER

▲

BUILT IN DATA

ETR DATA

LIVE

▼

DATA mode.

3. Press the MENU key to close the menu.

1-15

1. OPERATIONAL OVERVIEW

This page intentionally left blank.

1-16

2. RADAR OPERATION

This chapter covers radar operation, including the ARP (Auto Plotter) function. ARP requires a Model 18x4C-BB/19x4C-BB series network radar equipped with the ARP circuit board.

2.1 Radar Display

North marker (Head-up, Course-up mode)

Range/ range ring interval

Presentation mode

Alarm icon

EBL1

Battery icon

Simulation mode

Guard zone 1

Range ring

VRM1

Zoom area

EBL1 bearing

VRM1 range

Pulselength

3nm

12/

H-UP

S I M

EBL1

27.0°R VRM1

5.666nm

Guard zone 2

Cursor

Heading line

EBL2

327.1°R VRM2

8.212nm

EBL2 bearing, VRM2 range

319. 9

Heading M: Magnetic T: True

°M

TRAIL 30m

11.70

02m30s

G1 IN

G2 OUT

ES H

EAV L

IR L

359.9 ˚R

Trail time Trail elapsed time

Guard zone 1 Guard zone 2

Echo stretch

Echo averaging

Interference rejector

VRM2

EBL2 Own ship vector

(ARP-equipped model, true vector mode)

Zoom window

Cursor range and bearing (Cursor position may also be shown, in L/L or Loran C TD.)

Radar display

2.2 Transmitting, Stand-by

1. Confirm that the network radar is plugged in.

2. Press the DISP key to select a radar display.

3. Press the POWER/TX key momentarily.

4. Press the D: RADAR STBY soft key to highlight TX on its label.

5. Press the E: RETURN soft key.

When the radar picture is not required, but you want keep it in a state of readiness, press the D: RADAR TX soft key to highlight STBY on its label.

2-1

2. RADAR OPERATION

2.3 Tuning

The radar receiver can be tuned automatically or manually, and the default tuning method is automatic. If you require manual tuning, do the following:

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

2. Press the A: RADAR DISPLAY SETUP soft key.

3. Select TUNING, then press the A: EDIT soft key.

TUNING



AUTO



MAN

Tuning window

4. Choose MAN.

5. Adjust the ENTER knob until the tuning bar is at its longest position.

6. Press the MENU key to close the menu.

Note: If the auto setting does not provide satisfactory tuning, ask your dealer how to

re-adjust tuning.

Tuning bar

2.4 Adjusting the Gain

The GAIN key adjusts the gain sensitivity of the radar receiver. It works in a manner similar

to that of volume control of a broadcast receiver, which amplifies received signals.

The proper setting is such that the background noise is just visible on the screen. If your gain setting is too low, weak echoes may be missed. On the other hand, excessive gain 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 the receiver sensitivity, transmit on long range, and then do the following:

1. Press the GAIN key to show the “gain adjustment”

soft keys, and the last-used adjustment window appears. The example below shows the gain sensitivity adjustment window. The gain soft keys shown depend on radar source as shown below.

2. If the gain sensitivity window is not displayed, press the A: GAIN soft key to show the gain sensitivity setting window.

3. Use the Trackball to select AUTO ROUGH, AUTO

MODERATE, AUTO CALM, or MAN (manual) as appropriate. Select an AUTO option according to the sea state.

4. For manual adjustment, rotate the ENTER knob to adjust, while observing the radar

echo. The range of adjustment is 0-100.

5. Press the GAIN key on the front panel or the E: RETURN soft key to finish.

GAIN SENSITIVITY



AUTO ROUGH



AUTO MODERATE



AUTO CALM



MAN

Gain sensitivity window

2-2

2. RADAR OPERATION

Adjusting the FTC (When the radar source is the 17x4 series radar)

To suppress rain clutter from heavy storms or scattered rain clutter, adjust the FTC. In addition to reducing clutter, the FTC can be used in fine weather to clarify the picture when navigating in confined waters. However, with the circuit active the receiver is less sensitive. Therefore, turn off the FTC, by setting it for “0”, when its function is not required.

1. Press the GAIN key.

2. Press the D: FTC soft key to show the FTC window.

3. Rotate the ENTER knob to adjust. The range of adjustment is 0-100(%). Do not

overadjust the FTC – weak target echoes may be missed.

4. Press the GAIN key on the front panel or E: RETURN soft key to finish.

2.5 Reducing Sea Clutter

2.5.1 How the A/C SEA works

Echoes from waves can be troublesome, covering 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. Sea clutter may affect radar performance because real targets are sometimes hidden by the echoes of small waves. (See the left-hand figure in the figure below.) When sea clutter masks the picture, adjust the A/C SEA to reduce the clutter.

The A/C SEA 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.

Sea clutter at

screen center

Effect of A/C SEA

A/C SEA adjusted;

sea clutter suppressed

2-3

+ 203 hidden pages

Furuno 1954C-BB, 1964C-BB, GD-1920C-BB, 1834C-BB, 1934C-BB User Manual 2

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

FOREWORD

SYSTEM CONFIGURATIONS

1. OPERATIONAL OVERVIEW

1.1 Operating Controls

1.2 Inserting a Chart Card

1.3 Turning the Unit On/Off

1.4 Adjusting Hue, Panel Illumination

1.5 Selecting a Display

1.6 Trackball, Cursor

1.8 Data Boxes

1.9 Function Keys

1.10 Simulation Display

2. RADAR OPERATION

2.1 Radar Display

2.2 Transmitting, Stand-by

2.3 Tuning

2.4 Adjusting the Gain

2.5 Reducing Sea Clutter