Furuno 1742c, 1752c, 1762, 1762c, 1742 User Manual

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MARINE RADAR

MODEL1722/1732/1742/1752/1762 MODEL1722C/1732C/1742C/1752C/1762C

PUB. No. OME- 34940

( HIMAD

FIRST EDITION : APR. 2001

9-52, Ashihara- cho, Nishinomiya, Japan

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

Printed in Japan

Your Local Agent/Dealer

E1 : MAY 17, 2002

MODEL 1722/C SERIES

SAFETY INSTRUCTIONS

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel should work inside the equipment.

Do not disassemble or modify the equipment.

Fire, electrical shock or serious injury can result.

Immediately turn off the power at the switchboard if the equipment is emitting smoke or fire.

Continued use of the equipment can cause fire or electrical shock. Contact a FURUNO agent for service.

Keep heater away from equipment.

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.

exist are given in the

A heater can melt the equipment's power cord, which can cause fire or electrical shock.

Use the proper fuse.

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

CAUTION

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 about replacement.

WARNING

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

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

MODEL

1722

1732

1742

1752

1762

Distance to

100 W/m

point

Nil

0.15 m

0.20 m

Distance to

Worst case

0.50 m Worst case

0.50 m

Worst case

1.00 m

Worst case

3.00 m

10 W/m

Worst case

2.00 m

point

CAUTION

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

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

FOREWORD ...................................................................................................... viii

SYSTEM CONFIGURATIONS .............................................................................. x

1. OPERATIONAL OVERVIEW .........................................................................1-1

1.1 Operating Controls ...................................................................................................... 1-2

1.1.1 Display unit controls ......................................................................................... 1-2

1.1.2 Remote controller............................................................................................. 1-5

1.2 Inserting a Chart Card ................................................................................................. 1-6

1.3 Turn ing the Unit On/ Off................................................................................................ 1-7

1.4 Cursor Pad, Cursor...................................................................................................... 1-8

1.5 Display Brilliance, Panel Brilliance, Contrast, Hue....................................................... 1-9

1.5.1 Display brilliance, panel brilliance..................................................................... 1-9

1.5.2 Contrast...........................................................................................................1-10

1.5.3 Hue (MODEL1722C series).............................................................................1-10

1.6 Selecting a Display.....................................................................................................1-11

1.6.1 Display modes.................................................................................................1-11

1.6.2 Selecting a display ..........................................................................................1-12

1.6.3 Switching control in combination and overlay screens.....................................1-13

1.6.4 Selecting radar source.....................................................................................1-14

1.7 Data Boxes.................................................................................................................1-15

1.7.1 Showing, hiding data boxes with soft key........................................................1-15

1.7.2 Rearranging data boxes..................................................................................1-15

1.7.3 Temporarily erasing a data box........................................................................1-15

1.8 Function Keys.............................................................................................................1-16

1.8.1 Executing a function........................................................................................1-16

1.9 Simulation Display......................................................................................................1-17

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

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

2.2 Transmi tti ng, Stand-by................................................................................................. 2-2

2.3 Tun ing ......................................................................................................................... 2-2

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

2.5 Reducing Sea Clutter .................................................................................................. 2-4

2.5.1 How the A/C SEA works................................................................................... 2-4

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

2.6 Reducing Precipitation Clutter..................................................................................... 2-5

2.6.1 Adjusting the A/C RAIN.................................................................................... 2-5

2.6.2 Adjusting the FTC............................................................................................. 2-6

2.7 Range Scale................................................................................................................ 2-7

2.8 Pulselength.................................................................................................................. 2-8

2.9 Presentation Mode.......................................................................................................2-9

2.9.1 Selecting a presentation mode..........................................................................2-9

2.9.2 Description of presentation modes..................................................................2-10

2.10 Measuring the Range...............................................................................................2-12

2.10.1 Measuring range by range rings....................................................................2-12

2.10.2 Meas u ring range by cursor...........................................................................2-13

2.10.3 Mea su ring range by VRM.............................................................................2-14

2.10.4 Erasing a VRM, VRM indication....................................................................2-15

2.10.5 Erasing EBL/VRM data boxes.......................................................................2-15

2.10.6 Hiding EBL/VRM data boxes.........................................................................2-15

2.10.7 Moving EBL/VRM data boxes.......................................................................2-15

2.11 Measuring the Bearing.............................................................................................2-15

2.11.1 Measuring bearing by cursor ......................................................................... 2-15

2.11.2 Measuring bearing by EBL............................................................................2-15

2.11.3 Erasing an EBL, EBL indication.....................................................................2-16

2.11.4 Erasing EBL/VRM data boxes.......................................................................2-16

2.11.5 Hiding EBL/VRM data boxes......................................................................... 2-16

2.11.6 Moving EBL/VRM data boxes........................................................................2-16

2.12 Erasing the Heading Line, North Marker ..................................................................2-17

2.13 Reducing Noise........................................................................................................2-17

2.14 Reducing Radar Interference...................................................................................2-18

2.15 Zoom.......................................................................................................................2-19

2.15.1 Zooming in on radar targets..........................................................................2-19

2.15.2 Zooming ARP, TTM targets...........................................................................2-19

2.16 Shifting the Picture...................................................................................................2-20

2.16.1 Manual shift..................................................................................................2-20

2.16.2 Automatic shift..............................................................................................2-21

2.17 Using the O ffset EBL................................................................................................2-22

2.17.1 Predicting a collision course..........................................................................2-22

2.17.2 Measuring range & bearing between two targets..........................................2-23

2.18 Echo Trails...............................................................................................................2-24

2.18.1 Trail time.......................................................................................................2-24

2.18.2 Starting echo trails........................................................................................2-25

2.18.3 Trail brilliance (MODEL1722 series)..............................................................2-25

2.18.4 Trail gradation (MODEL1722C series)..........................................................2-25

2.18.5 Trai l color (MODEL1722C series).................................................................2-26

2.19 Echo Stretch............................................................................................................2-27

2.20 Echo Averaging........................................................................................................2-28

2.21 Outputting TLL Data.................................................................................................2-29

2.22 Guard Ala rm.............................................................................................................2-30

2.22.1 Setting a guard alarm zone...........................................................................2-30

2.22.2 When the alarm is violated…........................................................................2-31

2.22.3 Canceling the guard alarm............................................................................2-31

2.23 Watchma n................................................................................................................2-32

2.23.1 How watchman works...................................................................................2-32

2.23.2 Turning on/off watchman............................................................................... 2-32

2.23.3 Setting watchman stand-by interval ..............................................................2-32

2.24 Waypoi nt Marker......................................................................................................2-33

iii

2.25 ARP (optio n ), TTM operation....................................................................................2-34

2.25.1 Activating/deactivating ARP, TTM..................................................................2-35

2.25.2 Acquiring and tracking targets (ARP only).....................................................2-36

2.25.3 Displaying target number (internal, external ARP).........................................2-37

2.25.4 Terminating tracking of ARP targets..............................................................2-38

2.25.5 Setting vector attributes (ARP) ......................................................................2-39

2.25.6 Displaying past position display (ARP)..........................................................2-40

2.25.7 ARP, TTM target data....................................................................................2-41

2.25.8 CPA/TCPA alarm (ARP) ................................................................................2-42

2.25.9 Lost target alarm (ARP).................................................................................2-43

2.26 Interpreting the Radar Display..................................................................................2-44

2.26.1 General .........................................................................................................2-44

2.26.2 False echoes.................................................................................................2-46

2.26.3 SART (Search and Rescue Transponder) .....................................................2-48

2.26.4 Racon (Radar Beacon)..................................................................................2-50

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

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

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

3.1.2 Compass display.............................................................................................. 3-3

3.1.3 Highway display............................................................................................... 3-5

3.1.4 Nav data display............................................................................................... 3-6

3.2 Presentation Mode...................................................................................................... 3-7

3.2.1 North-up........................................................................................................... 3-7

3.2.2 Course-up ........................................................................................................ 3-8

3.2.3 Auto course-up................................................................................................. 3-8

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

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

3.5 Chart Cards................................................................................................................3-10

3.5.1 Chart card overview.........................................................................................3-10

3.5.2 Indices and chart enlargement ........................................................................3-11

3.5.3 FURUNO and NavCharts™.............................................................................3-12

3.5.4 C-MAP cards...................................................................................................3-14

3.6 Workin g with T ra c k.....................................................................................................3-18

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

3.6.2 Stopping, restating plotting of own ship track...................................................3-19

3.6.3 Changing track color (MODEL1722C series)...................................................3-20

3.6.4 Track plotting method and interval for own ship track......................................3-21

3.6.5 Changing own ship track/mark distribution setting...........................................3-22

3.6.6 Erasing track...................................................................................................3-23

3.7 Marks, Lines...............................................................................................................3-25

3.7.1 Entering a mark...............................................................................................3-25

3.7.2 Changing mark attributes ................................................................................3-25

3.7.3 Selecting line type ...........................................................................................3-26

3.7.4 Erasing marks, lines........................................................................................3-27

3.8 Waypoin ts...................................................................................................................3-29

3.8.1 Entering waypoints..........................................................................................3-29

3.8.2 Editing waypoint data ......................................................................................3-32

3.8.3 Erasing waypoints........................................................................................... 3-34

3.8.4 Changing waypoint mark size (FURUNO, NavCharts™).................................3-35

3.8.5 Searching waypoints.......................................................................................3-36

3.9 Routes.......................................................................................................................3-37

3.9.1 Creating routes...............................................................................................3-37

3.9.2 Connecting routes...........................................................................................3-41

3.9.3 Inserting waypoints.........................................................................................3-42

3.9.4 Removing waypoints from a route...................................................................3-44

3.9.5 Erasing routes.................................................................................................3-44

3.10 Navigation ................................................................................................................ 3-45

3.10.1 Navigating to a "quick point" .........................................................................3-45

3.10.2 Navigating to waypoints................................................................................3-46

3.10.3 Navigating to ports, port services (NavCharts™ only)...................................3-47

3.10.4 Following a route...........................................................................................3-49

3.11 Alarms ....................................................................................................................3-53

3.11.1 Audio alarm on/off.........................................................................................3-53

3.11.2 Arrival alarm..................................................................................................3-54

3.11.3 Anchor watch alarm ......................................................................................3-55

3.11.4 XTE (Cross Track Error) alarm......................................................................3-56

3.11.5 Speed alarm..................................................................................................3-56

3.11.6 Proximity alarm.............................................................................................3-57

3.11.7 Trip alarm...................................................................................................... 3-58

3.11.8 Alarm information.......................................................................................... 3-59

3.12 Resetting Trip Distance............................................................................................3-60

3.13 Entering the MOB Mark, Setting MOB as Destination ..............................................3-61

4. VIDEO SOUNDER OPERATION...................................................................4-1

4.1 Principle of Operation...................................................................................................4-1

4.2 Sounder Displays.........................................................................................................4-2

4.2.1 Selecting a sounder display..............................................................................4-2

4.2.2 Description of sounder displays........................................................................4-3

4.2.3 Selecting screen split method in combination displays......................................4-7

4.3 Automatic Sounder Operation......................................................................................4-8

4.3.1 How the automatic sounder works....................................................................4-8

4.3.2 Types of automatic sounder modes..................................................................4-8

4.3.3 How to enable automatic sounder operation.....................................................4-8

4.4 Manual Sounder Operation..........................................................................................4-9

4.4.1 Selecting the manual mode...............................................................................4-9

4.4.2 Selecting display range.....................................................................................4-9

4.4.3 Adjusting the gain.............................................................................................4-9

4.4.4 Range shifting.................................................................................................4-10

4.5 Measuring Depth, Time.............................................................................................. 4-11

4.6 Reducing Interference................................................................................................ 4-12

4.7 Reducing Low Level Noise.........................................................................................4-13

4.8 Erasing Weak Echoes ..............................................................................................4-14

4.9 White Marker (MODEL1722C series).........................................................................4-15

4.10 Picture Advance Speed............................................................................................4-16

4.10.1 Advancement independent of ship’s speed....................................................4-16

4.10.2 Advancement synchronized with ship’s speed...............................................4-17

4.11 Display Colors (MODEL1722C series)......................................................................4-18

4.12 Alarms......................................................................................................................4-19

4.12.1 Audio alarm on/off .........................................................................................4-19

4.12.2 Bottom alarm.................................................................................................4-20

4.12.3 Fish alarm .....................................................................................................4-20

4.12.4 Fish alarm (B/L).............................................................................................4-21

4.12.5 Wate r temperatu re alarm...............................................................................4-22

4.12.6 When an alarm setting is violated..................................................................4-23

4.13 Water Temperature Graph........................................................................................4-24

4.14 Interpreting the Sounder Display...............................................................................4-25

4.14.1 Zero line........................................................................................................4-25

4.14.2 Bottom echo..................................................................................................4-25

4.14.3 Fish school echoes........................................................................................4-26

4.14.4 Surface noise/Aeration..................................................................................4-26

5. CUSTOMIZING YOUR UNIT..........................................................................5-1

5.1 Generic Setup ............................................................................................................. 5-1

5.2 Radar Setup................................................................................................................ 5-3

5.2.1 Radar display setup.......................................................................................... 5-3

5.2.2 Radar range setup............................................................................................ 5-6

5.2.3 Function key setup........................................................................................... 5-7

5.3 Plotter Setup................................................................................................................ 5-9

5.3.1 Navigation options............................................................................................ 5-9

5.3.2 Function key setup..........................................................................................5-10

5.4 Chart Setup................................................................................................................5-12

5.4.1 Chart offset......................................................................................................5-12

5.4.2 FURUNO, Nav-Charts™ chart attributes.........................................................5-13

5.4.3 C-MAP chart attributes....................................................................................5-16

5.5 Data Boxes Setup.......................................................................................................5-20

5.6 Hot Page Setup..........................................................................................................5-21

5.7 Navigator Setup..........................................................................................................5-23

5.7.1 Navigation data source....................................................................................5-23

5.7.2 GPS receiver setup (Set equipped with GP-310B/320B).................................5-24

5.7.3 TD display setup..............................................................................................5-27

5.8 Nav Data Display Setup..............................................................................................5-29

5.9 Sounder Setup............................................................................................................5-30

5.9.1 System setup...................................................................................................5-30

5.9.2 Sensor setup...................................................................................................5-32

5.9.3 Sounding range, zoom range, bottom lock range ............................................5-33

5.9.4 Function key setup..........................................................................................5-34

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

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

6.1.1 Formatting 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.............................................................6-4

6.2 Uploading, Downloading Data......................................................................................6-5

6.2.1 Setting communication software on the PC.......................................................6-5

6.2.2 Uploading or downloading data.........................................................................6-5

6.3 Loading Waypoint Data from Yeoman..........................................................................6-8

6.4 Receiving Data Via Network Equipment.......................................................................6-9

6.5 Outputting Data Through the Network........................................................................6-10

7. MAINTENANCE, TROUBLESHOOTING ......................................................7-1

7.1 Preventive Maintenance...............................................................................................7-1

7.2 Replacement of Fuse...................................................................................................7-2

7.3 Replacement of Battery................................................................................................7-2

7.4 Simple Troubleshooting................................................................................................7-3

7.4.1 General.............................................................................................................7-3

7.4.2 Radar................................................................................................................7-4

7.4.3 Plotter...............................................................................................................7-5

7.4.4 Sounder............................................................................................................7-6

7.5 Diagnostics..................................................................................................................7-7

7.5.1 Memory I/O test................................................................................................7-7

7.5.2 Test pattern..................................................................................................... 7-10

7.5.3 Keyboard, remote controller test..................................................................... 7-11

7.6 GPS Status Display...................................................................................................7-12

7.7 Clearing Memories.....................................................................................................7-13

7.8 Error Messages..........................................................................................................7-14

APPENDIX ........................................................................................................ A-1

Menu Overview..................................................................................................................A-1

Geodetic Chart List..........................................................................................................A-12

World Time Chart.............................................................................................................A-13

Icons................................................................................................................................A-14

SPECIFICATION .............................................................................................SP-1

INDEX..........................................................................................................Index-1

Declaration of Comformity

vii

FOREWORD

A Word to the Owner of the MODEL1722/1722C Series Marine Radar

FURUNO Electric Company thanks you for purchasing t he MODEL1722/1722C Series Marine Radar. We are confident you will discover why the FURUNO name has become synonym ous 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 radar is designed and constructed t o 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 f ollow the operation and maintenance procedures set f orth 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.

viii

Features

The MODEL1722/1722C series work within our new product-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 10 Base-T network.

The main features are

! Bright 7” screen visible even under direct sunlight. ! User friendly operation with combination of discrete keys, soft keys and

! Accepts FURUNO and Nav-charts™ (NAVIONICS) or C-MAP charts. ! Fast chart redraw. ! Built-in NavNet interface circuit board. ! 12-channel GPS Receiver GP-310B with highly accurate position fixing

! User programmable function keys. ! Video sounder picture available with connection to optional network

! ARP function (when connecting with MODEL1833/1833C series)

Note: WAAS, available in North America, is a system of satellites and ground stations that provide GPS signal corrections, giving you better position accuracy, typically within three meters. Other systems are currently under developm ent : Multi-Functional Satellite Augmentation System (MSAS) in Japan, and Euro Geostationary Navigation Overlay Service (EGNOS) for Europe. The systems will be compatible with each other, so that by selecting WAAS below will enable reception of the signal from any system. Unless ot herwise specified this manual uses "WAAS" when referring to these position-fixing systems.

FOREWORD

cursor pad.

optionally available or GP-320B with WAAS (see the note in below.)

sounder.

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.

A NavNet system may consist of up to four display units and one ETR. For a system incorporating three or more product s , a “hub” is required to process data.

NavNet system

Two-unit NavNet system

SYSTEM CONFIGURATIONS

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

Three-or more unit NavNet system

This page is intentionally left blank .

1. OPERATIONAL OVERVIEW

This chapter provides basic information needed to get you started using your radar. The follow topics are presented:

• Control overview

• Chart card insertion

• Power on/off

• Contrast, brilliance and hue (Color series only) adjustment s

• Display selection

• Data boxes

• Function keys

• Simulation display

NOTICE

The brilliance of the LCD is adjustable to match a wide variety of lighting conditions. However, its maximum setting may not be sufficiently bright to permit viewing of the display with polarized sunglasses.

Note: The example screens 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 set tings.

1-1

1. OPERATIONAL OVERVIEW

1.1 Operating Controls

1.1.1 Display unit controls

Overview of display unit cont rols

The radar systems are mainly operated with controls of the display unit (and remote controller). 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 [ENT ER] knob mainly functions to register selections on the menu and enter alphanumeric data. The cursor pad’s main function is to move the cursor across the screen. Whenever you operate a key, a single beep confirms operation. Invalid operation causes the unit to emit three beeps.

Selects display mode.

Momentary press:

Registers own ship’s position as a waypoint.

Press three seconds:

Marks man overboard position.

Soft keys

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

Cursor pad Selects menu items and options; shifts cursor. Press, release and press again to change setting consecutively.

Opens/closes the alarm menu. Clears data; erases selected mark.

Opens/closes the main menu.

Selects a range. ENTER knob

Push: Registers options on menus. Rotate: Selects character; adjusts sensitivity

(sounder, radar); chooses menu items and options. Displays the soft keys for EBL/VRM. Radar: Displays the soft keys for adjustment of gain, A/C SEA, A/C RAIN and FTC.

Sounder: Adjusts gain.

Long press: Turns power on/off. Momentary press: Opens the

display for adjustment of brilliance, etc. For radar, switches STBY and TX.

Chart slot

Control panel

1-2

1. OPERATIONAL OVERVIEW

Soft keys

The five soft keys’ functions change according t o 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).

SOFT KEYS

Display unit

Some soft keys show the current state of the soft key function in reverse video as shown below.

.125nm SP

.250/ 319.9

H-UP

*: Only when MODEL 1833/C series are used as radar source.

359.9°R

0.24nm

SIGNAL PROCESS

I. REJ

LOW

E. AVG*

OFF

PULSE

SHORT

E. STR

LOW

RETURN

Plotter display

Current option shown in reverse video

1-3

1. OPERATIONAL OVERVIEW

[ENTER] knob

The [ENTER] knob functions to

• Register data

• Enter alphanumeric data such as waypoint name

• Select menu item s and options

• Adjust setting

Clockwise rotation of the knob selects an alphabet, symbol or numeric, in one of the sequences shown below. After you have selected desired alphanumeric character push the [ENTER] knob to register your selection.

[ENTER] knob

ENTER knob

Alphabet, symbol, numeric

A ! B ! C ! D ! E ! F ! G ! H ! I ! J ! K ! L ! M ! N ! O ! P ! Q ! R ! S ! T ! U ! V ! W ! X ! Y ! Z ! & ! _ ! ’ ! # ! 0 ! 1 ! 2 ! 3 ! 4 ! 5 ! 6 ! 7 ! 8 ! 9

Numerics 0 ! 1 ! 2 ! 3 ! 4 ! 5 ! 6 ! 7 ! 8 ! 9

1-4

1.1.2 Remote controller

RANGE

ABC1DEF2GHI

JKL

STU

EBL / VRM

WPT

MNO

VWX

’#

DISP

Operating distance 90°: Up to 5 m ±45°: Up to 3 m

SAVE

Replace the batteries (AA) when the

MOB

distance from which the display unit can be operated shortens.

Note: The remote controller may

PQR

become damaged if dropped. Mishandling of the remote

YZ&

controller is not covered by the warranty.

GAIN

CENTER

1. OPERATIONAL OVERVIEW

MARK ENT

BRILL

ENT

CLEAR

TONE

SK3SK1 SK2

TX /STBY

ALARM

SK4 SK5

CNTL

ACQ

HIDE /SHOW

Remote controller

Key Function Key Function RANGE Same as RANGE key on

display unit.

DISP Same as DISP key on

display unit.

SAVE MOB Same as SAVE MOB key on

CLEAR Same as CLEAR key on

display unit.

MENU Same as MENU key on

display unit.

BRILL Adjusts display brilliance.

display unit. Ten keys Enter alphanumerics. TONE Adjusts display contrast. EBL/VRM Same as EBL/VRM key on

display unit.

TX/STBY Toggles radar between

standby and transmit.

GAIN Same as GAIN key on

display unit.

ACQ Acquires radar target.

(Requires radar source equipped with ARP.)

WPT Displays “alphabet” WPT list

on plotter display. MARK ENT Same as MARK ENTRY soft

key. CENTER Ret ur ns own ship to screen

center on plotter display. CNTL Switches control between

displays on combination

ALARM Same as ALARM key on the

display unit.

HIDE/SHOW Same as HIDE/SHOW key

on display unit.

SK1 – SK5 (soft keys)

ENT

Same as soft keys on display unit.

Same as ENTER knob on display unit.

displays.

1-5

1. OPERATIONAL OVERVIEW

1.2 Inserting a Chart Card

Your unit reads FURUNO and Nav-Chart s™ (NAVIONICS), or C-MAP chart cards, depending on its specifications. Insert the appropriat e chart card for your area as follows:

1. Open the chart card slot lid.

Chart slot

Display unit

2. Insert desired chart card groove side up.

3. Close the lid to protect the chart drive.

Note 1: Do not insert or remove the chart card while turning power on. This may

cause the equipment to freeze.

Note 2: Do not remove a card while the chart is being drawn. This may cause

the equipment to freeze.

Note 3: A card remover is supplied to ease removal of chart cards. Attach the

card remover to the right-hand side hole on the card and pull to remove

card. You can leave the card remover attached to the card while the

card is in the card slot - push the card remover leftward until it contacts

the recessed area in the card.

Note 4: For multiple display units, do not use the same chart card type in more

than one display unit.

1-6

Chart card and card remover

1.3 Turning the Unit On/Off

Press the [POWER/BRILL] key to turn the unit on. A beep sounds and the equipment proceeds in the sequence shown below, displaying the product information screen, startup test results and the chart usage disclaimer, in that order. 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. F or any NG, try to press any key to go to the chart disclaimer screen, then perform the diagnostic test referring to the paragraph “7.6 Diagnostics.”

Chart List

Host Name

RADAR PLOTTER

STATION NAME: RADAR FURUNO ELECTRIC CO., LTD. CHARTS AVAILABLE FLYBRDG = ANB01004 RADAR = ANB01003

STARTUP TEST ROM OK RAM OK BACKUP DATA OK INTERNAL BATTERY OK

1. OPERATIONAL OVERVIEW

** = Program version no. (Two program version numbers. One for NAVIO and one for C-MAP.)

NO NATIONAL HYDROGRAPHIC OFFICE HAS VERIFIED THE INFORMATION IN THIS COASTLINE DATA CARD AND NONE ACCEPT LIABILITY FOR THE ACCURACY OF REPRODUCTION OR ANY MODIFICATIONS MADE THEREAFTER. THIS PRODUCT WITH

THIS COASTLINE DATA CARD DOES NOT REPLACE THE REQUIREMENT TO USE THE APPROPRIATE PRODUCTS FOR NAVIGATION ACCORDING TO NATIONAL AND INTERNATIONAL REGULATIONS.

PROGRAM No. 03591730**

Product information Startup test Chart disclaimer

The magnetron in the antenna unit takes about one minutes and thirty seconds to warm up before the radar can be operated. The time remaining for warm up of the magnetron appears at the center of the display, counting down from 1:30 to 0:01. You m ay 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/BRILL] key until the screen goes dark (approx. 3 sec.). To protect the LCD attach the hard cover. Note that the network sounder will be turned off approx. three minutes after turning off the power.

Note: You are asked if you want to start the simulation mode, which provides

simulated operation of the equipment, the f irst time you turn on the power (or any time power is applied after a memory reset) the message shown below is displayed. Push the [ENTER] knob to start the simulat ion mode, or press the [CLEAR] key to start normal operation. For further details about the simulation mode, see the paragraph “1.9 Simulation Display.”

START SIMULATION MODE? YES ... PUSH ENTER KNOB NO ... PUSH CLEAR KEY TO SKIP.

1-7

1. OPERATIONAL OVERVIEW

1.4 Cursor Pad, Cursor

The cursor pad mainly functions to shift the cursor, for measurement of range and bearing to a location (radar) and latitude and longitude position (plotter). Operate the cursor pad to shift the cursor. The cursor moves in the direction of the arrow or diagonal pressed, on the cursor pad.

For the plotter display, the cursor can be turned off with the CENTER sof t key. This also returns own ship marker to the screen center.

Cursor

.125nm SP

.250/ 319.9

H-UP

SIGNAL PROC

RADAR DISPLY

NAV FUNC

TARGET

ZOOM & D. BOX

359.9°R

0.24nm

Radar display

Cursor, cursor data

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

Cursor

34° 22. 3456'N 272.4°M TRIP NU

080° 22. 3456'E

15.9 nm 99.9 nm

16.0nm

Plotter display

MARK

ENTRY

MODE

NTH UP

CENTER

GOTO CURSOR

D. BOX ON/ OFF

1-8

1. OPERATIONAL OVERVIEW

1.5 Display Brilliance, Panel Brilliance, Contrast, Hue

You can adjust display brilliance, panel brilliance, contrast and hue (MODEL1722C series only) as shown below.

1.5.1 Display brilliance, panel brilliance

1. Press the [POWER/BRILL] key mom entarily. A set of soft keys for

adjustment of brilliance, contrast and hue (MODEL172 2C series only) appear. The last-used adjustment window appears. In the example below the display brilliance adjustment window is shown.

Current selection is higtlighted.

.125nm SP

.250/ 319.9

H-UP

DISPLAY BRILLIANCE

MODEL1722C series MODEL1722 series

2. Press the DI SPLY BRILL or PANEL BRI LL soft key as appropriate. An

adjustment window appears at the bottom of the screen. This window shows the name of the it em selected for adjustment plus current brilliance level, by bar graph.

BRILL CONTST

DISPLY BRILL

PANEL BRILL

CONTST

/HUE

RADAR

STBY

RETURN

.125nm SP

.250/ 319.9

H-UP

DISPLAY BRILLIANCE

Brilliance adjustment soft keys

CONTST

DISPLY BRILL

PANEL BRILL

CONTST

RADAR

STBY

RETURN

BRILL

DISPLAY BRILLIANCE

Display brilliance Panel brilliance

PANEL BRILLIANCE

Display brilliance and panel brilliance windows

3. Adj ust the [ENTER] knob, clockwise to raise the setting or counterclockwise

to decrease it. You may also use the soft key pressed at st ep 2, in which case the item selected is adjust ed cyclically, from low to high. Eight levels of display brilliance and panel brilliance are available.

4. Hit the RETURN soft key to finish.

The display brilliance can be adjusted by pressing the [POWER/BRILL] key. If the unit is turned on with minimum display brilliance, press the [POWER/BRILL] key consecutively to adjust the brilliance.

1-9

1. OPERATIONAL OVERVIEW

1.5.2 Contrast

1. Press the [ P OWER/BRILL] key momentarily.

2. Press the CO NTST (monochrome) or CONT ST/HUE (color) soft key.

3. For MODEL1722C series, two soft keys appear at the pressing of the CONTST/HUE soft key: CONTST and HUE. Press the CONTST soft key to adjust the contrast.

Contrast window

4. Adj ust the [ENTER] knob, clockwise to raise the setting or counterclockwise to decrease it. You may also use the CONTST soft key, in which case the item selected is adjusted cyclically, f r om low to high. 16 levels (monochrome) and 10 levels (color) of contrast are available.

5. Press the RET URN soft key to finish.

1.5.3 Hue (MODEL1722C series)

CONTRAST

1. Press the [ P OWER/BRILL] key momentary.

2. Press the CONTST/HUE soft key.

3. Press the HUE soft key to show the hue setting window.

HUE

▲

DAY

NIGHT

TWILIGHT

MANUAL SET

▼

Hue window

4. Operat e the cursor pad or [ENTER] knob to select hue desired, referring t o the table below. MANUAL SET follows the color settings on the RADAR DISPLAY SETUP for the radar, CHART DETAILS menu for the plotter and SOUNDER MENU for the sounder.

Day Night Twilight Applicable mode

Characters Black Red Green Plotter, radar, sounder Radar ring Green* Red Green* Radar Radar echo Orange Red Yellow Radar Background White Black Blue Plotter, radar Landmass Yellow Light Yellow Dim Yellow Radar

*: Red on C-map

5. Hit the RETURN soft key to finish.

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” hue setting is used. In this case, set HUE to other posit ion and then return to “MANUAL” to show the own ship track in black.

1-10

1.6 Selecting a Display

1.6.1 Display modes

If you have a navigator and network sounder connected, four full-screen displays are available: radar, plotter, and video sounder and navigation data. (MODEL1722C series have five screens, those mentioned above plus the overlay screen.) In addition to the full-screen display, you can divide the screen into half-screen combination displays to show two sets of images (data).

1. OPERATIONAL OVERVIEW

Full screen

(Ex. radar)

Combination screen

(Ex. radar + sounder)

Overlay screen

(Radar and plotter,

color model only.

Requires L/L data)

Display screens

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

Screen type and available display screen

Full screen Combination screen

options

Radar, plotter, sounder, nav data

Radar, plotter, echo sounder, compass, highway, compass/highway, nav data, overlay

Overlay screen options (Color series only)

Radar + plotter

1-11

1. OPERATIONAL OVERVIEW

1.6.2 Selecting a display

1. Press the [ DISP] key to show the full-screen selection window. The icons of modes not available are marked with “X” m ark. PAGE1-PAGE5 are user-arrangeable displays called “hot pages,” which you can configure as you like. For further details, see “5.5 Hot Page Set up.”

RADAR PLOT SNDR NAV OVRLY

PAGE1 PAGE2 PAGE3 PAGE4 PAGE5

Basic display screens

Hot pages

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

· PUSH ANY SOFT KEY TO SELECT IMAGE SOURCE.

Full-screen selection window (“overlay” for color model)

2. Rotat e the [ENTER] knob to select a basic display screen or a hot page screen.

3. Push the [ENTER] knob. If you selected a basic display screen, a set of combination display screens corresponding to the basic display screen that was selected appear. In the example below, radar combination displays are shown.

1-12

PUSH ENTER KNOB.

Radar combination screen selection window

4. Operate the [ENTER] knob to select the combination screen display desired and push it to set.

1. OPERATIONAL OVERVIEW

1.6.3 Switching control in combination and overlay screens

A soft key is provided in relevant combination and overlay screens (color series only) to switch control between displays. In the example below, the RADAR CNTRL and PLOTTR CNTRL soft keys enable switching control between the radar and plotter screens in the plotter/radar combination display.

3nm

H-UP

ST-BY

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

16.0nm

19.9 kt 99.9 nm

SIGNAL PROC.

RADAR DISPL Y

NAV

359.9

FUNC

11.7nm

T ARGET

RADAR

CNTRL

CNTL

RADAR

CNTRL

To adjust plotter

PLOTTR

CNTRL

To adjust

3nm

H-UP

ST-BY

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

16.0nm

19.9 kt 99.9 nm

359.9

11.7nm

radar

WP-002

FISH

WP-002

FISH

Radar display selected Plotter display selected

How to switch control between modes in the plotter/radar combination display

MARK ENTRY

MODE

NTH UP

NAV

POS

PLOTTR

CCNTRL

1-13

1. OPERATIONAL OVERVIEW

1.6.4 Selecting radar source

When other network radar is connected to the equipment, you may select an image source as shown below. This is not necessary when no other network radar is connected. Select one host name for the source though there are two or three radar units on the net.

Note: Turn the power off whenever changing the source.

1. Press the [ DI SP] key.

2. Press any sof t key to show the following display.

▲

RADAR SOURCE

RADAR SOUNDER SOURCE* SOUNDER

IP ADDRESS HOST NAME

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

- - -

172.031.003.001

RADAR

- - -

*: Do not change this setting.

SELECT SOURCE

EDIT

RETURN

Select source menu

3. Use the cursor pad t o select RADAR SOURCE and press the EDIT key.

RADAR SOURCE

1-14

RADAR

- - -

Radar source

Radar source and sounder source windows

4. Use the cursor pad and [ENTER] knob to enter source host name: ◄ or ► to select position and rotate the [ENTER] knob to select character.

5. Press the [ E NTER] soft key or [ENTER] knob.

6. Confirm that t he correct host name is entered.

7. Press the [DISP] key to finish.

8. Turn the power off and on again.

Note: Sources names are determined at installation. For example, the source

names for radars in a two radar system might be “RADAR” and “RADAR1”.

1.7 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, trip log and cursor position. 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 (radar, plotter, sounder). For how to select data for the data boxes, see paragraph “5.5 Data Boxes Setup”.

1. OPERATIONAL OVERVIEW

.125nm SP

.250/ 319.9

H-UP

MARK

ENTRY

MODE

NTH UP

NAV

POS

TRIP LOG

177

POSITION

58.535'N

122

36.496'W

COG

323.6

SOG

D.BOX

ON /OFF

20.0

350.4

0.000 nm

Data boxes

Plotter display, showing data boxes

1.7.1 Showing, hiding data boxes with soft key

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

Radar: ZOOM & D. BOX

→

box also shown/hidden) Plotter: D. BOX ON/OFF

D. BOX ON/OFF

Sounder: AUTO/D. BOX

→

1.7.2 Rearranging data boxes

You may select the location for data boxes as follows:

1. Using the cursor pad, move the cursor to 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 cursor pad to drag the data box to the location desired and push the [ENTER] knob.

1.7.3 Temporarily erasing a data box

You may temporarily erase a data box. Use the cursor pad to place the cursor inside the data box you wish to erase and press the [CLEAR] key. To redisplay the box, press the ZOOM & D.BOX soft key D.BOX soft key to display it.

1-15

1. OPERATIONAL OVERVIEW

1.8 Function Keys

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

Default Setting, Key Label Function

Key

Radar Plotter Echosounder

#1 Heading line on/off,

HL #2 Rings on/off, RNG Edit mar k/line, EML Clutter, CLT #3 Echo trail, TRL Ruler, RUL Signal level, SLV #4 Offcenter, SFT Add new waypoint,

#5 Radar source, RSR Waypoint

1.8.1 Executing a function

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

.125nm SP

.250/ 319.9

H-UP

°M

TARGET

H L

R N G

T R L

S F T

R S R

Function keys

Track on/off, TRK TLL output, TLL

Noise limiter, NL

ADD

Picture advance, PA alphanumeric list, ALP

34° 22. 3456'N 359.9°M

080° 22. 3456'E

19.9 kt 99.9 nm

TRIP

16.0nm

T R K

002WP

FISH

BRIDGE

R U

A L p

L A

D D

Function keys

1-16

359.9°R

0.24nm

Radar

Plotter

Function keys

2. Press function key desired.

Note: Function keys can be individually programmed f or the radar, plotter and sounder displays. For further details see the following: Radar: paragraph 5.2.3 Plotter: paragraph 5.3.2 Sounder: paragraph 5.9.4

1.9 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.

The simulation icon (

To start the simulation display;

1. Press the [MENU] key.

2. Press the SYSTEM CONFIGURATION, SYSTEM SETUP and SIMULATION SETUP soft keys in that order.

) appears when any simulation mode is active.

RADAR

LIVE

PLOTTER

LIVE

SOUNDER

LIVE

SPEED

00.0kt

COURSE

000.0°

LATITUDE

45°35.000’N

LONGITUDE

123°00.000’W

START DATE & TIME

00:00 01.APR.01

RADAR SIMULATION DATA

1. OPERATIONAL OVERVIEW

SIM SETUP

EDIT

RETURN

Simulation setup menu

2. Follow appropriate procedure shown below.

Radar

Internally generated echoes

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

RADAR

▲

SIMULATION 1

SIMULATION 2

LIVE

▼

2. Select SI MULATION 1 and press the [ENTER] knob.

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

1-17

1. OPERATIONAL OVERVIEW

Antenna unit-generated echoes

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

2. Select YES and push the [ENTER] knob to erase simulation data and get new data. The message “Now getting demo data. Do not turn off display 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. Wait one minute aft er the message disappears. Actual time may be longer depending on the system configuration. 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 fast ened.

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

4. Select SIMULATION 2, then press the [ENTER] knob.

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

Plotter

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

PLOTTER

▲

SIMULATION

LIVE

▼

2. Select SI MULATION, then press the [ENTER] knob.

3. Select SPEED and press t he EDIT soft key.

4. Enter speed (set ting range, 0-99 kt, default speed, 0 kt) with the

alphanumeric keys and push the [ENTER] knob.

5. Select CO URSE and press the EDIT key.

6. Select “8 FIGURE” to trace the simulated ship’s track in a figure-eight course,

or enter your own course at DIRECTION. Use the trackball to select digit and enter value with the alphanumeric keys.

7. Press the ENTER soft key.

8. Select LATITUDE and press the EDIT soft key.

N-85°S, default setting, 45°35.000’N) and

9. Enter lat itude (setting range, 85

push the [ENTER] knob.

10. Select LONGITUDE and press the EDIT soft key.

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

11. Enter longitude (setting range, 180

and push the [ENTER] knob.

12. Select START DATE & TIME and push the EDIT soft key.

13. Enter start date and time and push the [ E NTER] knob.

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

1-18

1. OPERATIONAL OVERVIEW

Sounder

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

SOUNDER

▲

SIMULATION 1

SIMULATION 2

LIVE

▼

2. Select SIMULATION 1 (internally generated echoes) or SIMULATION 2 (network sounder-generated echoes), then press the [ENTER] knob.

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

displays cannot be shown at SIMULATION 1 mode.

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

1-19

1. OPERATIONAL OVERVIEW

This page is intentionally left blank.

1-20

2. RADAR OPERATION

This chapter covers radar operation, including the ARP (Automatic Plot ter) function. ARP requires connection of MODEL1833/1833C series net work radar equipped with the ARP circuit board.

2.1 Radar Display

Range/ range ring interval

Presentation mode

Alarm icon

Battery icon

Zoom area

Guard zone 1

Cursor

Pulselength

.125nm

.250

. / 319.9

Heading M: Magnetic T: True

°M

H-UP

Heading line

North marker

TRAIL 30m

02m30s

G1 IN

G2 OUT

ES L

EAV L

IR L

Trail time Trail elapsed time

Guard zone 1 Guard zone 2 Echo stretch

Echo averaging* Interference rejector

Guard zone 2

VRM2

EBL1 VRM1 EBL2

Range ring

Own ship vector* (ARP-equipped model, true vector mode)

Zoom window

EBL1 range

VRM1 range

EBL1

27.0°R VRM1 0 .158nm

EBL2

327.1°R VRM2 0 .225nm

EBL2 bearing, VRM2 range

359.9°R

0.18nm

Radar display

* = Radar source Model 1833/1833C series radar

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

2-1

2. RADAR OPERATION

2.2 Transmitting, Stand-by

1. Turn the power on. The products information appears and is then followed by the radar screen. You can display the radar screen at once by pressing the any key.

2. Press the [POWER/BRILL] key momentarily.

3. Press the RADAR STBY soft key to highlight TX on its label.

4. When the radar picture is not required, but you want to keep it in a state of readiness, press the [POWER/BRILL] key momentarily followed by RADAR TX soft key.

5. Press the RETURN soft key to finish.

2.3 Tuning

The radar receiver can be tuned automatically or manually, and the default tuning method is automatic. To adj ust manually or switch to automatic tuning, do the following:

1. Press the [MENU] key to display the main m enu.

2. Press the RADAR DISPLAY SETUP soft key.

3. Select TUNING and press the EDIT soft key.

TUNING

AUTO

MAN

4. Choose MAN or AUTO as appropriate.

5. For manual tuning, adjust the [ENTER] knob until the tuning bar is at its

longest position.

6. Press the RETURN soft key.

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

Note: If the auto setting does not provide satisfactory tuning, see the installation

manual for how to adjust tuning.

2.4 Adjusting the Gain

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

Tuning bar

Tuning window

2-2

2. RADAR OPERATION

To adjust the receiver gain, transmit on long range, and then do the following:

1. Press the [ GAIN] key. The last-used “adjustment window” is displayed. In the example below, the gain sensitivity adjustment is shown.

Item selected for adjustment is highlighted.

.125nm

.250/ 319.9

H-UP

GAIN SENSITIVITY



AUTO ROUGH

¤

AUTO MODERATE

AUTO CALM

¡

MAN

GAIN ADJUST

GAIN

A/C SEA

A/C RAIN

FTC

RETURN

359.9°R

0.24nm

.125nm

.250/ 319.9

H-UP

GAIN SENSITIVITY



AUTO ROUGH

¤

AUTO MODERATE

AUTO CALM

¡

MAN

GAIN ADJUST

GAIN

A/C SEA

A/C RAIN

A/C AT ON/OFF

RETURN

359.9°R

0.24nm

MODEL 1722 series MODEL 1833/C series

Gain adjustment soft keys

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

GAIN SENSITIVITY

 ¤

AUTO ROUGH

AUTO MODERATE

AUTO CALM

¡

MAN

Gain sensitivity window

3. Press ▲ or ▼ 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. The range of adjustment is 0-100.

5. Press the [GAIN] key on the front panel or the RETURN soft key to finish.

2-3

2. RADAR OPERATION

2.5 Reducing Sea Clutter

2.5.1 How the A/C SEA works

Echoes from waves can be troublesome, covering the cent ral part of the display with random signals known as “sea clutter”. The higher the waves and the higher the antenna is 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 amplif icat ion of echoes at short ranges (where clutter is the greatest) and progressively increases am plification as the rang e increases, so amplification will be normal at those ranges where there is no sea clutter.

Sea clutter at

screen center

2.5.2 Adjusting A/C SEA

A/C SEA should be adjusted so that the clutter is broken up into small dots, and small targets becom e distinguishable.

1. Press the [ GAIN] key.

2. Press the A/ C SEA soft key to show the A/C SEA setting window.

A/C SEA

 ¡

AUTO ROUGH

AUTO MODERATE

AUTO CALM

¤

MAN

Model 1722/C series radar

3. When the radar source is the Model 1722/C series radar, press ▲ or ▼ to select AUTO ROUGH, AUTO MODERATE, AUTO CALM, or MAN (manual) as appropriate. Select an AUTO option according to sea state.

4. For manual adjustment, rotate the [ENTER] knob to adj ust while observing radar echoes. The range of adjustment is 0-100. Do not overadjust the A/C SEA – weak target echoes may be missed.

A/C SEA adjusted;

sea clutter suppressed

Effect of A/C SEA

Model 1833/C series radar

A/C SEA setting window

A/C SEA

2-4

5. When the radar source is the Model 1833/C series radar, A/C SEA and A/C RAIN can be automatically adjusted. Press the A/C AT soft key to select ON or OFF as appropriate. When turned on, it overrides A/C SEA and A/C RAIN settings.

6. Press the [GAIN] key on the front panel or RETURN soft key to finish.

2.6 Reducing Precipitation Clutter

The vertical beamwidth 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, hail, etc.) in the same manner as normal target s. Precipitation clutter shows as random dots on the screen.

2.6.1 Adjusting the A/C RAIN

When echoes from precipitation mask solid targets, adjust the A/C RAIN. This split up these unwanted echoes into a speckled pattern, making recognition of solid targets easier.

1. Press the [GAIN] key.

2. Press the A/ C RAIN soft key to show the A/C RAIN window.

2. RADAR OPERATION

A/C RAIN

A/C RAIN setting window

3. Rotat e the [ENTER] knob to adjust the A/C RAIN affect. The current level is shown on the A/C RAIN level bar in the A/C RAIN window, and the range of adjustment is 0 to 100. Do not overadjust the A/C RAIN – weak target echoes may be missed.

4. Press the [GAIN] key on the front panel or RETURN soft key to finish.

2-5

2. RADAR OPERATION

2.6.2 Adjusting the FTC

To suppress rain clutter from heavy storms or scattered rain clutter, adjust the FTC. The FTC splits up these unwanted echoes into a speckled patt ern, making recognition of solid targets easier.

Note: 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 t he FTC, by setting it for “0”, when its function is not required.

FTC is available when the radar source is the MODEL1722 series radar.

1. Press the [ GAIN] key.

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

FTC

FTC setting window

3. Rotate the [ENTER] knob to adjust. The range of adjustm ent is 0-100. Do not overadjust the FTC – weak target echoes may be m issed.

4. Press the [GAIN] key on the front panel or RETURN soft key to finish.

2-6

2.7 Range Scale

The range setting determines the size of the area (in nautical miles) that will appear on your display. in addition, the range setting will also automatically adjust the range ring interval so that accurate range measurements may be made while operating on any range setting.

The range, range ring interval and pulselength appear at the top left-hand corner of the display.

Press the [RANGE (+ or -)] key to change the range scale.

2. RADAR OPERATION

Range scales (nm, sm)

Range 0.125 0.25 0.5 0.75 1 1.5 2 3 4 6 8 12 16 24 36 48 64 72 Ring

Interval No. of

Rings

0.0625 0.125 0.125 0.25 0.25 0.5 0.5 1 1 2 2 3 4 6 12 12 16 18

2 2 4 3 4 3 4 3 4 3 4 4 4 4 3 4 4 4

Range scales (km)

Range 0.25 0.5 0.75 1 1.5 2 3 4 6 8 12 16 24 36 48 64 72 Ring

Interval No. of

Rings

0.125 0.25 0.25 0.25 0.5 0.5 1 1 2 2 3 4 6 12 12 16 18

2 2 3 4 3 4 3 4 3 4 4 4 4 3 4 4 4

Note 1: Maximum range depends on the network radar as shown below.

Model 1722, 1722C: 24 nm Model 1732, 1732C, 1742, 1742C, 1752, 1752C, 1833, 1833C: 36 nm Model 1762, 1762C, 1933, 1933C: 48 nm Model 1943, 1943C: 64 nm Model 1953C: 72 nm

Note 2: You may choose which ranges to use from the RADAR RANGE SETUP

menu. For details see paragraph 5.2.2.

2-7

2. RADAR OPERATION

2.8 Pulselength

The pulselength in use is displayed at the upper left corner of the display. Appropriate pulselengths are preset to individual range scales. Therefore, you are not usually required to select them. If you are not satisfied with the current pulselength setting, however, it is possible to change it for the 1.5 and 3 nm (sm) ranges (3 and 6 kilometer ranges) as below. Generally, select a longer pulse for longer detection range and shorter pulse for better range discrimination.

1.5 nm, 1.5 sm, 3 km: Short pulse, medium pulse

3 nm, 3 sm, 6 km: Middle pulse, long pulse

1. Press HIDE/SHOW to show soft the radar soft keys.

2. Set the range to 1.5 or 3 nm , whichever you want to set.

3. Press the SIGNAL PROC. soft key.

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SIGNAL PROCESS

I. REJ

LOW

E. AVG

OFF

PULSE

SHORT

E. STR

LOW

RETURN

359.9°R

1.40nm

Shown when radar source is the Model 1833/C series network radar. Not shown otherwise.

Signal process soft keys

3. Press the PULSE soft key to select the pulselength setting. SHORT or MEDIUM for 1.5 nm, 1.5 sm, 3 km and MEDIUM or LONG for 3 nm, 3 sm, 6 km.

4. Press the RET URN soft key to finish.

2-8

2.9 Presentation Mode

This unit provides four radar presentation modes: head-up, course-up, north-up and true motion.

Heading data is required for modes other t han head-up. (When you use the network radar, input the radar source.)

2.9.1 Selecting a presentation mode

1. Press HIDE/SHOW to show soft the radar soft keys.

2. Press the RADAR DISPLY soft key to show the RADAR DISPLAY soft keys.

2. RADAR OPERATION

Current mode setting

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MODEL1722C series MODEL1722 series

RADAR DISPLAY

MODE

HD UP

SHIFT

RINGS

MED

HL OFF

RETURN

359.9°R

0.24nm

.125nm

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H-UP

359.9°R

0.24nm

RADAR DISPLAY

MODE

HD UP

SHIFT

RINGS

ON /OFF

HL OFF

RETURN

Radar display soft keys

3. Press the MODE soft key. Each pressing of the key changes the presentation mode and the presentation mode indication in the sequence of North-up, True Motion, Head-up, and Course-up.

Mode name Indicator on display Soft key label

North up N-UP NTH UP

True motion TR-M TRUE M

Head up H-UP HD UP

Course up CSE UP CSE UP

4. Press the RET URN soft key to finish.

Note: When heading data is lost, the presentation mode automatically goes to

head-up, the heading indication at the screen top shows “- - -.-°” and the audio alarm sounds. Press the [ALARM] key to acknowledge the alarm. The message “HEADING DATA MISSING” appears. Rest ore compass signal to show heading indication. Use the MODE soft key to select presentation mode if necessary. The audio alarm may be silenced with the [CLEAR] key.

2-9

2. RADAR OPERATION

2.9.2 Description of presentation modes

Head-up

A display without azimuth stabilization in which the line connecting the center with the top of the display indicates own ship’s heading. The targets are painted at their measured distances and in their directions relat ive to own ship’s heading.

The short line on the bearing scale is the north marker.

North Marker

Heading Line

Head-up presentation mode

Course-up

The radar picture is stabilized and displayed with the currently selected course at the top of the screen. As you change heading, the ship’s heading marker moves. If you select a new course, the picture resets to display the new course at the top of the display.

North Marker

Heading Line

2-10

Course-up presentation mode

2. RADAR OPERATION

North-up

In the north-up mode, target s are painted at their measured distances and in their true (compass) directions from own ship. North is maintained at the top of the screen. The heading line changes its direction according to the ship’s heading.

North

Heading Line

North-up presentation mode

True motion

Fixed radar targets maintain a constant posit ion on the screen, while your own ship moves across the radar image at the correct speed and heading. A map-like image is displayed, with all moving vessels traveling in true perspective to each other and to fixed landmasses. As your ship’s position approaches the edge of the screen, the radar display is automatically reset to reveal the area ahead of your ship. You can m anually reset your ship’s position at any time by pressing the RADAR DISPLAY soft key followed by the SHIFT soft key.

North

Heading Line

True motion presentation mode

2-11

2. RADAR OPERATION

2.10 Measuring the Range

You can measure the range to a radar target three ways: by the range rings, by the cursor, and by the VRM (Variable Range Marker).

2.10.1 Measuring range by range rings

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.

To turn the range rings on, do the following:

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the RADAR DISPLY soft key.

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MODEL1722C series MODEL1722 series

RADAR DISPLAY

MODE

HD UP

SHIFT

RINGS

MED

HL OFF

RETURN

359.9°R

0.24nm

.125nm

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H-UP

359.9°R

0.24nm

RADAR DISPLAY

MODE

HD UP

SHIFT

RINGS

ON /OFF

HL OFF

RETURN

Radar display soft keys

4. Press the RINGS soft key to select ON (MODEL1722 series) or desired brilliance (MODEL1722C series) among LOW, MED and HIGH.

To disappear rings, select OFF.

4. Press the RET URN soft key to finish.

2-12

2.10.2 Measuring range by cursor

Operate the cursor pad to place the cursor intersection on the inside edge of the radar target. The range to the target, as well as the bearing, appears to the right of “+” at the bottom of the display.

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H-UP

Cursor

Target

2. RADAR OPERATION

SIGNAL PROC.

RADAR DISPLY

NAV FUNC

TARGET

ZOOM & D. BOX

4.3°R

0.240nm

Bearing and range from own ship to cursor position

How to measure range and bearing to a target with the cursor

2-13

2. RADAR OPERATION

2.10.3 Measuring range by VRM

1. Press the [EBL/VRM] key to display the EBL/VRM soft keys.

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EBL VRM

EBL1 ON

VRM1 ON

OFFSET

EBL2 ON

VRM2 ON

359.9°R

0.240nm

EBL/VRM soft keys

2. Press the VRM1 ON (dotted ring VRM) or VRM2 ON (dashed ring VRM) soft key to select the desired VRM. The selected VRM’s indication, at the bottom of the screen, is highlighted.

3. Rotate the [ENTER] knob the place the VRM on the inside edge of a radar target. Read the VRM indication to find range to t he target.

4. You may hide the EBL/VRM soft keys by pressing the [EBL/VRM] key.

VRM1

(Dotted line)

VRM2

(Dashed line)

VRM1 range

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EBL1

---.-°R VRM1

0.119nm

EBL2

---.-°R VRM2

0.242nm

EBL VRM

EBL1 ON

VRM1 ON

OFFSET

EBL2 ON

VRM2 ON

359.9°R

0.240nm

Active marker is highlighted.

VRM2 range

How to measure range with the VRM

2-14

2.10.4 Erasing a VRM, VRM indication

Press appropriate VRM soft key and press the [CLEAR] key. The VRM is erased, and its indication becomes blank.

2.10.5 Erasing EBL/VRM data boxes

Press the EBL or VRM soft key associated with the EBL/VRM data box you wish to erase. Press the [CLEAR] key once or twice to erase the data box.

2.10.6 Hidi ng EBL/VRM data boxes

Press the ZOOM & D. BOX and D. BOX ON/OFF soft keys to show or hide the EBL/VRM data boxes.

2.10.7 Moving EBL/VRM data boxes

When an EBL/V RM data box is obscuring a target that you need to see, you can move it to another location as shown below. This cannot be done when the EBL/VRM soft keys are shown.

1. Press the [EBL/VRM] key to erase the EBL/VRM soft keys if shown.

2. Using the cursor pad, 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 data box is correctly selected.

3. Use the cursor pad to drag the data box to the location desired and push the

[ENTER] knob.

2. RADAR OPERATION

2.11 Measuring the Bearing

There are two ways to measure the bearing to a target: by the cursor, and by the EBL (Electronic bearing Line).

2.11.1 Measuring bearing by cursor

Use the cursor pad to locate the cursor to the center of the target The bearing to the target appears in the range and bearing box at the bottom right-hand corner on the screen, next to the “+” mark.

2.11.2 Measuring bearing by EBL

1. Press the [ EBL/VRM] key.

2. Press the EBL1 O N (dotted line EBL) or EBL2 ON (dashed line EBL) soft key

to select the desired EBL. The selected EBL’s indication, at the bottom of the screen, is highlighted.

3. Rotat e the [ENTER] knob to bisect the radar target with the EBL. Read the

EBL indication to find the bearing to the target

4. You may hide the EBL/VRM soft keys by pressing the [EBL/VRM] key.

2-15

2. RADAR OPERATION

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EBL VRM

EBL1

(Dotted line)

EBL2

(Dashed line)

EBL2 bearing

EBL1 bearing

R: Relative

T: True

EBL1

330.1°R VRM1

-.---nm

EBL2

234.1°R VRM2

-.---nm

How to measure bearing with the EBL

Note: Bearing can be shown Relative to ship’s heading (relative) or in reference

to North (True). This setting may be changed by changing the EBL REFERENCE setting, which is in the RADAR DISPLAY SETUP menu. See the paragraph “5.2.1 Radar display setup.”

2.11.3 Erasing an EBL, EBL indication

EBL1 ON

VRM1 ON

OFFSET

EBL2 ON

VRM2 ON

359.9°R

0.24nm

Active marker is highlighted.

Press appropriate EBL soft key and press the [CLEAR] key. The EBL is erased and its indication becomes blank.

2.11.4 Erasing EBL/VRM data boxes

Press the EBL or VRM soft key associated with the EBL/VRM data box you wish to erase. Press the [CLEAR] key once or twice to erase the data box.

2.11.5 Hidi ng EBL/VRM data boxes

Press the ZOOM & D. BOX and D. BOX ON/OFF soft keys to show or hide the EBL/VRM data boxes.

2.11.6 Moving EBL/VRM data boxes

When an EBL/V RM data box is obscuring a target that you need to see, you can move it to another location as shown below. This cannot be done when the EBL/VRM soft keys are shown.

1. Press the [EBL/VRM] key to erase the EBL/VRM soft keys if appears.

3. Use the cursor pad to drag the data box to the location desired and push the

[ENTER] knob.

2-16

2. RADAR OPERATION

2.12 Erasing the Heading Line, North Marker

The heading line indicates 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 its orientation depending on the ship orientation in north-up, course-up and true motion modes.

The north marker appears as a short dashed line. In t he head-up and course-up modes the north m arker moves around the bearing scale as the ship’s heading moves.

To tem porarily erase the heading line and north marker, press the RADAR DISPLY soft key followed by the HL OFF soft key. Release the key to redisplay the markers.

2.13 Reducing Noise

Noise, appearing on the displays as random “speckles,” can be reduced as follows:

1. Press the [MENU] key to open the menu.

2. Press the RADAR DISPLAY SETUP soft key.

3. Select NOISE REJECTION and press the EDIT soft key.

4. Select OFF, HIGH or LOW as appropriate.

5. Press the ENTER soft key or the [ENTER] knob.

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

2-17

2. RADAR OPERATION

2.14 Reducing Radar Interference

Radar interference may occur when near another shipborne radar that is operating in the same frequency band as your radar. Its on-screen appearance looks like many bright dots either scattered at random or in the form of dotted lines extending from the center to the edge of the display. Interference effects are distinguishable from normal echoes because they do not appear in the same place on successive rotations of the scanner.

Be sure to turn off the interference rejection circuit when no interference exists – weak targets may be missed.

Radar interference

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the SIGNAL PROC. soft key.

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SIGNAL PROCESS

I. REJ

LOW

E. AVG

OFF

PULSE

SHORT

E. STR

LOW

RETURN

359.9°R

0.240nm

Shown when radar source is the Model 1833/C series network radar. Not shown otherwise.

2-18

Signal process soft keys

3. Press the I . REJ soft key to choose the interference rejection level desired;

LOW, MED, HIGH or OFF.

4. Press the RET URN soft key to finish.

The display shows IR L (Low), IR M (Medium) or IR H (High) when the interference rejecter is on.

2.15 Zoom

The zoom feature allows you to double the size of the area select ed with the zoom circle, which appears at the bott om right - or left -hand corner on t he disp lay. The zoom feature is available on any range but is inoperative in true motion and when the display is shifted.

2.15.1 Zooming i n on r adar targets

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the ZOOM & D. BOX soft key to show ZOOM & D. BOX soft keys.

3. Press the ZOOM ON/OFF soft key to select ON. A solid circle, called the “zoom circle,” appears on the display.

4. Use the cursor pad to set the cursor where you want to zoom.

5. Press the CURSO R FLOAT soft key to fix the zoom cursor position. (The solid circle changes to a dashed one.)

6. To release the cursor, press the CURSOR FLOAT soft key. (The dashed circle changes to a solid one.) Relocate the zoom cursor, then press the CURSOR LOCK key.

7. To quit the zoom function, press the ZOOM ON/OFF soft key to select OFF.

2. RADAR OPERATION

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Zoom circle

Zoom window

2.15.2 Zooming ARP, TTM targets

You may zoom in on TTM targets coming into t he display. TTM targets can come from a NAVNET connected RADAR, or from other ARP RADAR that is outputting the TTM message. Not e: TTM stands for Tracked Target Message. It is a NMEA 0183 data sentence that is an available output from some ARP capable RADAR. TTM target numbers must be displayed to zoom in on tracked targets. This can be done by enabling the target ID number option in the ARP setup menu.

001.0°R

0.160nm

Zoom

ZOOM & D. BOX

ZOOM

ON /OFF

CURSOR

FLOAT

ARPA TGT ZM

D. BOX ON/OFF

RETURN

Requires optional ARP Board in 1833/1833C series network radar. Not shown when radar source is otherwise.

2-19

2. RADAR OPERATION

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the ZOOM/D.BOX soft key to show ZOOM & D.BOX soft keys.

3. Press the ZOOM soft key to select ZOOM ON.

4. Press the ARP TGT ZM soft key.

5. Use the [ENTER] knob to select number (1-10) and then push the [ENTER] knob. If the target does not exist several beep sounds and the zoom function is cancelled.

To cancel, press the CURSOR LOCK soft key.

Note: The zoom window blends in with the background when the background color for the radar picture is white. If the window is difficult to see change the background color.

SELECT TARGET NO.

▲

▼

Target no. selection window

2.16 Shifting the Picture

Own ship position, or sweep origin, can be displaced manually or automatically to expand the view field without switching to a larger scale.

2.16.1 Manual shift

The sweep origin can be shifted in any presentation mode to a point specified by the cursor by up to 60% of the range in use in any direction.

1. Locate the cursor anywhere within the effective radius of the display.

2. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

3. Press the RADAR DISPLY soft key.

4. Press the SHIFT soft key.

5. Press the MANUAL soft key to shift. The heading line shifts to the cursor location. SHIFT appears at right-hand corner of the display.

6. Press the RETURN soft key to finish.

7. To cancel shift , press the RADAR DISPLY, SHIFT and OFF soft keys in that order.

2-20

2. RADAR OPERATION

SHIFT

Cursor

Place cursor where desired.

2.16.2 Automatic shift

In the head-up mode, the amount of shift is automatically calculated with speed. The maximum shift amount is limited to 60% of t he range in use. For example, if you set the shift speed setting for 15 knots and the ship is running at 10 knots, the amount of shift will be 40%. The formula for determining shift amount is as shown below.

Ship's speed Shift speed setting

Setting automatic shift maximum speed

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the RADAR DI SPLY soft key.

3. Press the SHIFT soft key to show the shift soft keys.

4. Press the AUTO S.SPD soft key to display the auto ship speed setting window.

X 0.6 = Amount of shift(%)

Press the MANUAL soft key.

Shifting the picture manually

AUTO SHIP SPEED

Auto ship speed setting window

5. Adj ust the cursor pad or [ENTER] knob to set the m aximum speed of your vessel and then push the [ENTER] knob or the ENTER sof t key to set. The setting range is 1-999 kt and the default setting is 15 kt.

Automatic shift

Press the AUTO key to automatically shift the sweep origin. To cancel shift, press the RADAR DISPLAY, SHIFT and OFF soft keys.

2-21

2. RADAR OPERATION

2.17 Using the Offset EBL

The offset EBL can be used to predict a potential collision course, and can also be used to measure the range and bearing between two targets.

2.17.1 Predicting a collision course

The procedure below may be used to check if a radar target is on a collision course with your vessel.

1. Press the [EBL/VRM] key to show the EBL/VRM soft keys.

2. Press the EBL1 ON soft key to turn on the EBL1.

3. Press the OFFSET soft key. The origin of EBL1 moves to the cursor position and an “X” appears at the cursor position.

4. Use the cursor pad to place the cursor on the radar target which looks like it might be on a collision course with own ship.

5. Push the [ENTER] knob to fix the origin position.

6. After waiting for a few minutes (at least three minutes), rotate the [ENTER]

knob so the EBL bisects the target at the new position. If t he target tracks along the EBL towards the center of the display (your ship’s position), the target may be on a collision course.

7. To cancel the offset EBL, press the O FFSET soft key.

Target tracked here

Initial target position

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EBL1

45.0°R VRM1

-.---nm

EBL VRM

EBL1 ON

VRM1 ON

OFFSET

EBL2 ON

VRM2 ON

359.9°R

.0.240nm

Predicting collision course with the offset EBL

2-22

2. RADAR OPERATION

2.17.2 Measuring range & bearing between two targets

The procedure which follows shows how to measure the range and bearing between two targets, using the targets “A” and “B” in the figure below as an example.

1. Operat e the cursor pad to place the cursor on the target “A”.

2. Press the [EBL/VRM] key to show the EBL/VRM soft keys.

3. Press the EBL1 O N soft key to turn on the EBL1.

4. Press the O FFSET soft key. The origin of EBL1 and VRM1 moves to the cursor position, which is marked with an “X.”

5. Rotate the [ENTER] knob so the EBL bisects the target “B”.

6. Press the [ENTER] knob.

7. Press the VRM1 ON soft key and then rotate the [ENTER] knob to place t he VRM1 on the inner edge of the target “B”.

8. Look at the indications for VRM1 and EBL1 to find the range and bearing between the two targets.

9. To cancel the offset EBL, press the O FFSET key.

Target B

Target A

Bearing and range between target A and target B

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EBL1

45.0°R VRM1

0.125nm

EBL VRM

EBL1 ON

VRM1 ON

OFFSET

EBL2 ON

VRM2 ON

359.9°R

0.24nm

Measuring range and bearing between two targets

2-23

2. RADAR OPERATION

2.18 Echo Trails

Echo trails are simulated aft erglow of target echoes that represent their past movements relative to own ship. This funct ion is useful for alerting you past possible collision situations.

2.18.1 Trail time

1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2. Press the TARGET soft key.

3. Press the T RAI L soft key.

Echo trail

Sample echo trails

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TRAIL

H-UP

TRAIL

ON /OFF

TRAIL TIME

GRAD

SINGLE

HIGH

TRAIL COLOR

RETURN

359.9°R

0.24nm

.125nm SP

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H-UP

MODEL1722C series MODEL1722 series

Trail soft keys

4. Press the TRAIL TIME soft key to show the trail time window.

TRAIL

ON /OFF

TRAIL TIME

BRILL HIGH

RETURN

359.9°R

0.24nm

2-24

TRAIL TIME

▲

15 seconds

30 seconds

1 minute

3 minutes

6 minutes

15 minutes

30 minutes

CONTINUOUS

▼

Trail time window

5. Use the cursor pad t o select time desired.

6. Press the ENTER soft key to finish.

2.18.2 Starting echo trails

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the TARGET and TRAIL soft keys.

3. Press the TRAIL ON/OFF to select ON.

4. Press the RET URN soft key twice to finish.

“TRAIL,” the echo trail time selected and elapsed time appear at the top right-hand corner of the display. Then, afterglow starts extending from all targets. Trails are restarted when the range or mode is changed, and zoom or shift is turned on.

For continuous trails the maximum continuous trail time is 99 minutes and 59 seconds. When t he elapsed time clock counts up to that time, the elapsed time display resets to zero and trail begins again.

To turn off echo tr ail, press the TRAIL ON/OFF soft key to select OFF at step 3 n the above procedure.

Note: No echo trails are shown where a tx sector blanking area is set.

2.18.3 Trail brilliance (MODEL1722 series)

2. RADAR OPERATION

Trail brilliance can be selected to high or low as below.

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the TARGET and TRAIL soft keys.

3. Press the BRILL soft key to select HIGH or LO W.

4. Press the RETURN soft key twice to finish.

2.18.4 Trail gradation (MODEL1722C series)

The echo trails can be shown in single or multiple gradations. Multiple gradation paints the trails thinner with time, like the afterglow on an analog PPI radar.

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the TARGET and TRAIL soft keys.

3. Press the G RAD soft key to select SINGLE or MULTI as appropriate.

Multitone Monotone

Multitone and monotone trails

4. Press the RET URN soft key twice to finish.

2-25

2. RADAR OPERATION

2.18.5 Trail color (MODEL1722C series)

The MODEL1722C series may be shown echo trails in blue, yellow, green or white.

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the TARGET, TRAIL and TRAIL CO LOR soft keys.

TRAIL COLOR

▲

BLUE

YELLOW

GREEN

WHITE

▼

Trail color window

3. Use the cursor pad t o select the color desired.

4. Press the ENTER soft key.

5. Press the RET URN soft key twice to finish.

2-26

2.19 Echo Stretch

Normally, the reflected echoes from long range targets appear on the display as weaker and smaller blips even though they are compensated by the radar’s internal circuitry. The echo stretch function magnifies these small blips in all ranges. Two types of echo stretch are available: ES LOW which stretches echoes in bearing direction and ES HIGH which stretches them in both range and bearing directions.

Target

Bearing direction

2. RADAR OPERATION

Range direction

Bearing direction

Echo Stretch OFF

This function magnifies not only targets but also sea clutter and radar interference. For this reason, be sure sea clutter and radar interference are properly suppressed before activating the echo stretch.

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the SIGNAL PROC. soft key.

3. Press the E. STR soft key to select HIGH, LOW or OFF as appropriate.

4. Press the RETURN soft key to finish.

The display shows ES H (High) or ES L (Low) when the echo stretch is on.

"LOW" Echo stretch "HIGH" Echo stretch

Types of echo stretch

2-27

2. RADAR OPERATION

2.20 Echo Averaging

The echo average feature, available with selection of a Model 1833/C series network radar as radar source, effectively suppresses sea clutter. Echoes received from stable targets such as ships appear on t he screen at almost the same position during every rotation of the ant enna. On the other hand, unstable echoes such as sea clutter appear at random positions.

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

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

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the SIGNAL PROC. soft key.

3. Press the E. AVG soft key to select desired echo averaging. OFF: No averaging

LOW: Helps distinguish target s from sea clutter and suppresses brilliance

of unstable echoes. MED: Distinguishes small stationary targets such as navigation buoys. HIGH: Stably displays distant targets.

The display shows EAV L, EAV M or EAV H when echo averaging is on.

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

Effect of echo averaging

4. Press the RET URN soft key to finish.

2-28

2.21 Outputting TLL Data

Target position data can be output to units of the network and shown on their plotter screen, with the waypoint mark. This function requires position and heading data.

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Operate the cursor pad to place the cursor on the target whose position you wish to output.

3. Press the TARGET soft key.

2. RADAR OPERATION

.125nm SP

.250/ 319.9

TARGET

H-UP

TRAIL

TLL OUTPUT

ACQ

TARGET INFO

RETURN

359.9°R

0.240nm

Shown with selection of 1833/C series network radar equipped with ARP function as source. Not shown otherwise.

TARGET soft keys

4. Press the TLL OUTPUT soft key to output t arget position data.

5. Press the RET URN soft key to finish.

Note: The screen of the TLL recipient may be temporarily interrupted when

receiving TLL from another NavNet display unit. Press any key to restore normal operation.

2-29

2. RADAR OPERATION

2.22 Guard Alarm

The guard alarm allows the operator to set the desired range and bearing f or a guard zone. When ships, islands, landmasses, etc. violate the guard zone, an audio alarm sounds and the offending target blinks to call the operator’s attention.

• 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.

CAUTION

2.22.1 Setting a guard alarm zone

To set a guard alarm zone, set the radar to transmit and do the following:

1. Press the [ALARM] key.

2. Use the cursor pad to set the cursor on the top left corner (or top right corner) of the guard zone you want to set, then press the SET GUARD1 or SET GUARD2 soft key, depending on which guard zone you want to set.

3. Use the cursor pad to set the cursor on the bottom right corner (or top left corner) of the guard zone area and push the [ENTER] knob.

4. Press RETURN soft key to finish.

.125nm SP

.250/ 319.9

H-UP

ALARM

SET GUARD1

SET GUARD2

.125nm SP

.250/ 319.9

H-UP

ALARM GUARD 1

SET GUARD1

ERASE GUARD1

SET GUARD2

2-30

RETURN

MOVE +CURSOR TO ANOTHER CORNER OF GUARD1 AND PUSH KNOB TO SET.

317.2°R

0.230nm

(1) Drag cursor to top (or bottom) corner for guard zone and press the SET GUARD1 or SET GUARD2 soft key.

How to set a guard alarm zone

RETURN

NO ALARM

19.9

.125n

.032nm

39.9°R

.0.230nm

(2) Drag cursor diagonally to bottom (or top) corner for guard zone and press the [ENTER] knob.

The equipment then searches f or targets inside the guard zone to determine the guard alarm type. If a target is found inside the guard zone the guard zone type becomes an “Outward guard alarm”, and any target exiting, the guard zone will trigger an alarm. If no target is found the guard zone type becomes an “Inward guard alarm”, and any targets entering the guard zone will trigger the alarm. The guard alarm type is shown as G1(G2) IN or G1(G2) OUT.

Note 1: When the radar range is less than the guard zone range, the audio

alarm sounds and the alarm icon is displayed (red on the color model). Press the [CLEAR] key to silence the alarm. Press the [ ALARM] key and the message “GUARD1(2) IS OUTSI DE RADAR RANG E” appears. Reselect appropriate range.

Note 2: If the network radar is set to standby while the guard alarm is active, the

guard alarm is cancelled. The guard alarm is redisplayed when the radar is set to transmit again.

Note 3: If the network radar is set to standby while the radar picture is not

displayed, the alarm icon appears (red on the color m odel) and the alarm sounds. Press the [ALARM] key and the message “STBY MODE HAS BEEN SELECTED. GUARD/WTCHMN CANCELED.” or “GUARD/WATCHMAN CANCELED. STBY/TX SELECTED.” appears.

2.22.2 When the alarm is violated…

2. RADAR OPERATION

Any radar target violating the guard zone will flash, the audio alarm sounds, and the alarm icon appears (red on the color m odel). Additionally the message “TARGET ENTERED INTO GUARD1(GUARD2)” or “TARGET LEFT FROM GUARD1(GUARD2)” is displayed at the bottom of the screen, depending on the guard zone type. Press the [CLEAR] key to silence the alarm.

2.22.3 Canceling the guard alarm

1. Press the [ A LARM] key to show the ALARM menu.

2. Press the ERASE GUARD1 or ERASE GUARD2 soft key as appropriate.

3. Press the RETURN soft key to finish.

2-31

2. RADAR OPERATION

2.23 Watchman

2.23.1 How watchman works

The watchman function periodically transmits radar pulses for one minut e to check for targets in a guard zone. If a target is found in the zone, watchman is cancelled, the audio alarm sounds and the radar continues tr ansmitting. If no target is found the radar goes into standby, for the number of minutes selected on the RADAR DISPLAY SETUP menu. This feature is useful when you do not need the radar’s function cont inuously but want to be alerted to radar targets in a specific area. “WTCH” appears at the top left corner when Watchman is active.

ST-BY

1 min

Watchman starts

5,10 or 20 min

* Beeps emitted just before radar transmits.

1 min

How watchman works

2.23.2 Turning on/ off watchman

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the NAV FUNC soft key.

3. Press the W. MAN ON/OFF soft key to select ON or OF F as appropriate.

4. Press RETURN soft key to finish.

Note: When the watchman is activated and no guard zone is active, the

message “PLEASE SET GUARD ZONE. PUSH ANY KEY TO CONTINUE.” appears. Press any key and then set a guard zone.

2.23.3 Setting watchman stand-by interval

The watchman standby period interval, that is, the number of minutes the radar is in standby, can be set to 5, 10 or 20 minutes as follows:

1. Press the [MENU] key.

2. Press the RADAR DISPLAY SETUP soft key.

3. Select WATCHMAN TIME and press the EDIT soft key.

WATCHMAN TIME

5,10 or 20 min

2-32



5 minutes

¡

10 minutes

20 minutes

Watchman window

4. Select time desired and press the ENTER soft key.

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

2.24 Waypoint Marker

A waypoint marker, showing waypoint position output from a navigation device, may be inscribed on the radar display. You may show or hide this marker as desired.

2. RADAR OPERATION

.125nm SP

.250/ 319.9

H-UP

Waypoint marker

NAV FUNC

W. MAN ON/OFF

WPT MK

ON /OFF

RETURN

359.9°R

0.24nm

Waypoint marker

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the NAV FUNC soft key.

3. Press the W P T MK ON/OFF soft key to select ON or OFF as appropriate.

4. Press the RETURN soft key to finish.

2-33

2. RADAR OPERATION

2.25 ARP (option), TTM operation

When the radar source is ARP-equipped Model 1833/C series net work radar, you can manually and automatically acquire and track 10 targets. Once a target is acquired automatically or manually it is aut omatically tracked within 0.1 to 32 nm. When the FURUNO heading sensor PG-1000 is connected, RMC sentence (NMEA) is required for true heading data.

Alternatively, you can display the tracks of other ships by receiving the data sentence “TTM” through the NETWORK or NMEA port. However, targets cannot be acquired.

Usage precautions for ARP

WARNING

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

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

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

CAUTION

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

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

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

Display accuracy is affected by the following:

• Echo intensity

• Radar transmission pulsewidth

• Radar bearing error

• Gyrocompass error

• Course change (own ship or target)

2-34

2.25.1 Activating/deactivating ARP, TTM

1. Press the [ MENU] key followed by the ARP SETUP soft key to show the ARP SETUP menu.

ARP TARGET INFO

INTERNAL ARP

CANCEL ALL TARGETS

ARP VECTOR MODE

TRUE

ARP VECTOR TIME

30 minutes

HISTORY INTERVAL

OFF

CPA

OFF

TCPA

30 seconds

AUTO ACQUISITION AREA

OFF TARGET ID NUMBER OFF

2. RADAR OPERATION

ARP SETUP

EDIT

RETURN

ARP setup menu

2. Select ARP TARGET INFO, and then press the EDIT soft key to show the ARP target info window.

ARP TARGET INFO

▲

INTERNAL ARP

¡

EXTERNAL ARP

OFF

▼

ARP target info window

3. Select I NT E RNAL ARP, EXTERNAL ARP or OFF as appropriate. INTERNAL ARP: The radar source must be the MODEL1833/C series radar.

Select this item also for a NavNet unit being fed ARP targets. EXTERNAL ARP: Receive TTM data sentence via NETW O RK or NMEA port.

Target tracks are shown but targets cannot be acquired. OFF: Turns off the ARP or TTM display.

4. Press the ENTER soft key.

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

2-35

2. RADAR OPERATION

2.25.2 Acquiring and tracking targets (ARP only)

Ten targets may be acquired and tracked manually and automatically. When you attempt to acquire an eleventh target, the message “ARP FULL – ALREADY TRACKING 10 TARGETS!” appears for five seconds. To acquire another target, terminate tracking of an unnecessary target as shown in the paragraph 2.25.4.

Manual acquisition

1. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

2. Press the TARGET soft key.

3. Place the cursor on the target to acquire and press the ACQ soft key.

4. Press the RET URN soft key.

The plot symbol changes its shape according to its status as below. A vector appears about one minute aft er acquisition, indicating the target’s motion trend.

Vector

01*

At acquisition 1 min. after

acquisition

* = Target number shown when TARGET ID NUMBER is turned on in the ARP SETUP menu.

01*

3 min. after acquisition

01*

Target Number

ARP plot symbols

Automatic acquisition

The ARP can acquire up to ten targets automatically by setting an automatic acquisition area. W hen automatic acquisition is selected af t er acquiring targets manually, only the remaining capacity for targets may be automatically acquired. For example, if seven targets have been manually acquired, three targets may be automatically acquired.

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

2. Press the ARP SET UP soft key to show the ARP SETUP menu.

3. Operat e the cursor pad to select AUTO ACQUISITION AREA.

4. Press the EDIT soft key to show the automatic acquisition area window.

AUTO ACQ. AREA

▲

OFF

▼

2-36

Automatic acquisition area window

5. Select ON.

6. Press the ENTER soft key.

2. RADAR OPERATION

7. Press the [MENU] key to close the menu. An acquisition area of 2.0 to 2.5

miles in range and ±45º on either side of the heading line in bearing appears.

Note: Targets being tracked in automatic acquisition are continuously

tracked when switching to manual acquisition.

Automatic acquisition area

45° port

2.0 - 2.5 nm

45° starboard

Automatic acquisition area

2.25.3 Displaying target number (internal, external ARP)

Target num ber can be shown for ARP and TTM targets as below.

ARP Target Number

.125nm SP

.250/ 319.9

H-UP

TARGET

TRAIL

TLL OUTPUT

ACQ

TARGET INFO

RETURN

359.9°R

0.240nm

ARP target number

1. Press the [ MENU] key.

2. Press the ARP SETUP soft key.

3. Select TARGET ID NUMBER.

4. Press the EDIT soft key.

5. Select O N or OFF (default setting) as appropriate.

6. Press the ENTER soft key.

7. Press the [ MENU] key to close t he menu.

2-37

2. RADAR OPERATION

2.25.4 Terminating tracking of ARP targets

When 10 target s have been acquired, no more targets may be acquired unless targets are cancelled. If you need to acquire additional targets, you must first cancel one or more individual targets, or all of the targets, using one of the procedures below.

Terminating tracking of selected targets

1. Place the cursor on the target to terminate tr acking.

2. Press the [ CLEAR] key to erase to terminate tracking and erase the target .

Terminating tracking of all targets

1. Press the [MENU] key followed by the ARP SETUP soft key.

2. Select CANCEL ALL TARGETS.

3. Press the EDIT soft key.

CANCEL ALL TARGETS

▲

¡ ¤

▼

YES NO

Cancel all targets window

4. Select YES.

5. Press the ENTER soft key.

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

2-38

2.25.5 Setting vector attributes (ARP)

What is a vector?

A vector is a line extending from a tracked target which shows speed and course of the target. The vector tip shows an estim ated position of the target after the selected vector time elapses. It can be useful to extend the vector length in order to evaluate the risk of collision with any target.

Vector

Vector reference, vector time

You m ay reference the vectors to North (True) or ship’s heading (relative) as desired. Vector time can be set to 30 seconds, 1, 3, 6, 15 or 30 minutes.

1. Press the [ MENU] key followed by the ARP SETUP soft key to show the ARP SETUP menu.

2. Operat e the cursor pad to select ARP VECTOR MODE.

3. Press the EDI T soft key to show the vector mode window.

2. RADAR OPERATION

Vector

ARP VECTOR MODE

RELATIVE TRUE

Vector mode window

4. Select T RUE or RELATIVE as appropriate.

5. Press the ENTER soft key.

6. Select ARP VECTOR TIME, and t hen press the EDIT soft key to show the ARP vector time window.

ARP VECTOR TIME

▲

30 seconds

1 minute

¡

3 minutes

¡

6 minutes

¡

15 minutes

30 minutes

▼

ARP vector time window

7. Operate the cursor pad to select vector time among 30 sec, 1 min, 3 min, 6 min, 15 m in and 30 min.

8. Press the ENTER soft key.

9. Press the [ MENU] key to close t he menu.

2-39

2. RADAR OPERATION

2.25.6 Displaying past position display (ARP)

This ARP can display time-spaced dots (maximum 10 dots) m arking the past positions of any targets being tracked. You can evaluate a target’s actions by the spacing between dots. Below are examples of dot spacing and target movement.

(a) Ship turning

(b) Ship running straight

(d) Ship increased speed

Past position displays

To turn the past position display on or off:

1. Press the [ MENU] key followed by the ARP SETUP soft key.

2. Operat e the cursor pad to select HISTORY INTERVAL.

3. Press the EDI T soft key to show the plot interval window.

HISTORY INTERVAL

▲

OFF

¡

30 seconds

¡

1 minute

¡

3 minutes

6 minutes

▼

History interval window

4. Operate the cursor pad to select plotting interval among 30 sec, 1 min, 3 min and 6 min, or select OFF to turn off the past position display.

5. Press the ENTER soft key.

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

2-40

2.25.7 ARP, TTM target data

This ARP calculates motion trends (range, bearing, course, speed, CPA and TCPA) of all target been tracked. You can show this data for a tracked target as below. TARGET ID NUMBER, in the ARP SETUP menu, must be turned on to show ARP target data.

1. Place the cursor on the target whose data you want to see.

2. If not displayed, press the [HIDE/SHOW] key to display the radar soft keys.

3. Press the TARGET and TARGET INFO soft keys. The data of the selected target appears at the bottom left-hand corner of the display. (If an EBL/VRM data box is displayed the ARP data box will be under it.)

4. Press the RET URN soft key to finish.

5. To erase the ARP target data box, select the corresponding target with the

cursor and press the [CLEAR] key.

2. RADAR OPERATION

Cursor

ARP Target

.125nm SP

.250/ 319.9

TARGET

H-UP

TRAIL

TLL OUTPUT

ACQ

TARGET INFO

RETURN

No.01 VECTOR TRUE 15min CSE 359.9°T SPD 12.5kt CPA 2nm TCPA 12.35

CPA and TCPA Course and Speed Target No., Vector Reference (True), Vector Time

ARP target data

359.9°R

0.240nm

2-41

2. RADAR OPERATION

2.25.8 CPA/TCPA alarm (ARP)

When the predict ed CPA of any target becomes smaller t han a preset CPA alarm range or its predicted TCPA less than a preset TCPA alarm limit, an audio alarm sounds, which you may silence with the [CLEAR] key. In addition, the target plot symbol of t he offending target changes to a triangle and flashes together with its vector. Press the [ALARM] key and the message COLLISION ALARM appears. Press the CLEAR ALARM soft key to acknowledge the alarm. The flashing of the tr iangle plot symbol continues until you intentionally term inate tracking of the target. The ARP continuously monitors the predicted range at the Closest Point of Approach (CPA) and predicted time to CPA (TCPA) of each target to own ship.

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

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

CAUTION

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

Follow the steps shown below to set the CPA/TCPA alarm range:

1. Press the [ MENU] key followed by the ARP SETUP soft key.

2. Operat e the cursor pad to select CPA.

3. Press the EDI T soft key to show the CPA window.

CPA

▲

OFF

0.5nm

¡

1nm

¡

2nm

¡

3nm

¡

5nm

6nm

▼

CPA window

2-42

4. Select a CPA limit desired by the cursor pad.

5. Press the ENT E R soft key. The ARP SETUP menu reappears.

6. Press the cursor pad t o select TCPA.

7. Press the EDI T soft key to show the TCPA window.

8. Select a TCPA limit.

9. Press the ENTER soft key.

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

2.25.9 Lost target alarm (ARP)

When the system detects a lost target, t he target symbol becomes a diamond and tracking is discontinued after one minute.

TCPA

▲

30 seconds

1 minute

¡

2 minutes

¡

3 minutes

¡

4 minutes

¡

5 minutes

¡

6 minutes

12 minutes

▼

TCPA window

2. RADAR OPERATION

Lost target mark

Canceling a lost target

1. Place the cursor on the target.

2. Press the [ CLEAR] key.

2-43

2. RADAR OPERATION

)

2.26 Interpreting the Radar Display

2.26.1 General

Minimum and maximum ranges

Minimum range

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

1.5 or 0.75 nm, a target having an echoing area of 10 m

is still shown separate from the point representing the antenna position. It is mainly dependent on the pulselength, antenna height, and signal processing such as main bang suppression and digital quantization.

Maximum range

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

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

= 2.2 x ( h1 + h2

max

where Rmax: radar horizon (nautical miles) h1: antenna height (m) h2: target height (m)

Radar horizon

Optical horizon

Radar horizon

For example, if the height of the antenna above the waterline is 9 meters and the height of the target is 16 meters, the maxim um radar range is;

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

max

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

2-44

2. RADAR OPERATION

Radar resolution

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

Bearing resolution

Bearing resolution is the ability of the radar to display the echoes received from two targets, which are at the same range and close together, as separate targets. Bearing resolution is directly proportional to the antenna length, and inversely proportional to the radar's wavelength.

Range resolution

Range resolution is the ability to display the echoes received from two targets, which are on the same bearing and close to each other, as separate targets.

Bearing accuracy

One of the most important features of the radar is how accurately the bearing of a target can be measured. The accuracy of bearing measurement basically depends on the narrowness of the radar beam. However, the bearing is usually taken relative to the ship’s heading, and thus, proper adjustment of the heading marker at installation is an important factor in ensuring bearing accuracy. To minimize error when measuring the bearing of a target, select a range which will put the target as far out to t he edge of the radar screen as possible.

Range measurement

Measurement of the range to a t arget is also a very important function of the radar. Generally, there are two means of measuring range: the fixed range rings and the variable range marker (VRM). The fixed range rings appear on the screen with a predetermined interval and provide a rough estimate of the range to a target. The variable range marker’s diameter is increased or decreased so that the marker touches the inner edge of the target, allowing the operator to obtain more accurate range m easurements.

2-45

2. RADAR OPERATION

2.26.2 False echoes

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

Multiple echoes

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

True echo

Target

Own ship

Multiple echo

Multiple echoes

Sidelobe echoes

Every time the radar pulse is transmit t ed, some radiation escapes on each side of the beam. T his stray RF is called sidelobe. If a target exists where it can be detected by the side lobes as well as the main lobe, the side echoes m ay be represented on both sides of the true echo at t he same range. Sidelobes appear usually only on short ranges and from strong targets. They can be reduced through careful reduction of the gain or proper adj ustment of the A/ C SEA control.

Target A

Target B (Spurious)

Target B (True)

2-46

Sidelobe echoes

2. RADAR OPERATION

;

Virtual image

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

Target ship

Own ship

True

echo

Mirror image of target ship

False echo

Virtual image

Shadow sectors

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

Radar antenna

Radar mast

Shadow sector

Shadow sectors

2-47

2. RADAR OPERATION

2.26.3 SART (Search and Rescue Transponder)

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

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

Echo of SART

Position of SART

Screen A: When SART is distant

Radar antenna beamwidth

24 NM

Own ship's position

9500 MHz

9200 MHz

7.5 µs

Sweep start

Low speed sweep signal

Screen B: When SART is close

1.5 NM

Own ship's

SART mark length

Sweep time

95 µs

High speed sweep signal

position

Radar receiver bandwidth

Lines of 12 dots are displayed in concentric arcs.

Echo of SART

Position of SART

2-48

Appearance of SART signal on the radar display

2. RADAR OPERATION

General procedure for detecting SART response

1. Use the range scale of 6 or 12 nm as the spacing between the SART responses is about 0.6 nm (1125 m) to distinguish the SART.

2. Turn off the automatic clutter suppression (if applicable).

3. Turn off the Interference Rejector.

General remarks on receiving SART

SART range errors When responses from only the 12 low frequency sweeps are visible (when the

SART is at a range greater than about 1 nm), the position at which the first dot is displayed may be as much as 0.64 nm beyond the true position of the SART. When the range closes so t hat the fast sweep responses are seen also, the first of these will be no more than 150 m eters beyond the true position.

Radar bandwidth This is normally matched t o the radar pulselength and is usually switched with

the range scale and the associated pulselength. Narrow bandwidths of 3-5 MHz are used with long pulses on long range and wide bandwidths of 10-25 MHz with short pulses on short ranges.

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

Radar side lobes As the SART is approached, sidelobes from the radar antenna may show the

SART responses as a series of arcs or concentric rings. These can be removed by the use of the [A/C SEA] control although it may be operationally useful to observe the sidelobes as they may be easier to detect in clutter conditions and also they will confirm that the SART is near to the ship.

Gain For maximum range SART detection the normal gain setting f or long range

detection should be used, that is, with background noise speckle visible.

2-49

2. RADAR OPERATION

A/C SEA control

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

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

A/C RAIN control

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

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

Note: This SART information is excerpted from IMO SN/Circ 197 Operation of

Marine Radar for SART Detection.

2.26.4 Racon (Radar Beacon)

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

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

Racon

Appearance of racon signal on the radar display

2-50

3. PLOTTER OPERATION

3.1 Plotter Displays

You may show the plotter display over the entire screen, in the overlay screen (MODEL1722C series), or in a combination screen. Press the [DISP] key to show the screen selection window, and then rotat e the [ENTER] knob to select PLOT, NAV or OVRLY (overlay) as appropriate.

3.1.1 Full-screen plotter display

Scale

Icon (from left) North Marker Chart Alarm Track Hold Chart Offset Save L/L Offset Battery Simulation (See icon table on page A-14 for details.)

Nav data window

Presentation mode

(Data changes with NAV soft key setting and cursor status. For details see next page.)

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

16.0nm

002WP

Waypoint name

FISH

19.9 kt 99.9 nm

BRIDGE

Own ship marker

Course bar

Waypoint marker

(North-up)

Trip distance

TRIP

MARK

ENTRY

MODE

NTH UP

NAV

POS

D. BOX ON/OFF

Own ship track

Functions for soft keys

Full-screen plotter display

Note: The own ship marker blinks when the unit loses the GPS signal. The

message “No GPS fix!” appears approx. 90 seconds after the positioning error and is accompanied by the audio alarm. When the message “NO POSITION DATA” appears, a cable may be loosened.

3-1

3. PLOTTER OPERATION

Nav data window

The data shown in the nav data window depends on the status of the NAV soft key and the cursor.

Latitude and longitude of cursor intersection

Waypoint data (waypoint selected with cursor)

Latitude, Longitude

34°24. 3456'N 359. 9°M

124°24. 3456'W 59.9nm 99. 9nm

Cursor Mark

001WPT

Bearing to Cursor

TRIP

Range to Cursor

Trip Distance

CourseBearing to WaypointWaypoint Name

359. 9°M359. 9°M

19. 9nm 19. 9kt 99. 9nm

SpeedRange to WaypointWaypoint Mark Trip Distance

TRIP

Presentation Mode

Own ship position

Destination waypoint data

Own ship speed and course

NAV POS

soft key

NAV WPT

soft key

NAV S/C

soft key

CourseLatitude, Longitude

34°24. 3456'N 359. 9°M

TRIP

124°24. 3456'W 19. 9kt 99. 9nm

Own Ship Mark Speed Trip Distance

Bearing to WaypointWaypoint Name

001WPT

Waypoint Mark

Course, Speed

CSE

359. 9° 359. 9 °M 79. 9°F NU

SOG

19. 9kt 99. 9nm 345 ft

Range to Waypoint

Bearing to Waypoint

BRG RNG

359. 9°M

19. 9nm

TTG

4D02H23M NU

ETA

1st 13:45

Estimated Time of Arrival

TMP DPT

Presentation Mode

Time-to-Go to Destination

Presentation Mode

* Requires appropriate sensor.

Turns off nav data window

NAV OFF

soft key

Range to Waypoint

Water Temp., Depth*

Contents of nav data window

3-2

3.1.2 Compass display

The compass display, displayed at the bottom half of the screen in the combination display, provides steering information. The compass rose shows two triangles: the black triangle (hollow on monochrome model) shows the bearing to destination waypoint and the red (solid on monochrome) t r iangle, which moves with ship’s course, shows own ship’s course.

The water temperature and depth graphs, which require appropriate sensors, show the latest 10 minutes of temperature and depth data. The range of the depth graph is 50 feet and it is automatically adjusted with depth.

3. PLOTTER OPERATION

Time-to-go to destination

Destination waypoint bearing (black and filled

on color model,

hollow on monochrome model)

Depth graph*

* = Requires appropriate sensor.

Destination waypoint

003WPT

0D 9H 59MTTG 23th23:59

DPT

45.2ft

Shown (in red on color model) when direction to steer is "left."

Bearing scale

Speed over ground

Range to destination waypoint

RNG

10.0

SOG

BRG

359.9°M

CSE

Own ship marker (For color model, black when within XTE range, yellow when over; flashes when over XTE range on monochrome model)

Speed through water

99.9nm

ETA

STW

TMP

16.2°F

10.0

Direction to steer (green on color model)

Estimated time of arrival at destination

Ship's course (red and filled

on color model, filled on monochrome model

Water temperature graph*

)

XTE monitor (See next page for description.)

Compass display

3-3

3. PLOTTER OPERATION

Reading the XTE (cross-track error) monitor

The XTE monitor, located below the compass rose, shows the amount you are off course and the direction to steer to return to course. The own ship marker shows the direction and amount your ship is off course. It is shown in black when the amount of cross-tr ack error is within the XTE monitor range and yellow when it is over. An arrow appears at the right or left side of the XTE monitor and it shows the direction to steer to return to intended course. (For the color m odel the arrow is shown in red when you should steer left, and green when you should steer right.) In the example on t he previous page you would steer right to return to course. To maintain course, steer the vessel so the own ship marker stays at the center of the XTE monitor.

Soft keys EDIT XT-LMT: Sets the range for XTE monitor scale. See the procedure below

for how to set.

Setting the range for the XTE monitor

1. With the compass (or highway) display shown, press the EDIT XT-LMT soft key to display the following window.

XTE LIMIT

0 .1nm

XTE range setting window

2. Use the cursor pad to select digit to change. Note that all digits may be cleared by pressing the [CLEAR] key.

3. Use the [ENTER] knob to set value, or press the CANCEL soft key to cancel.

RESET XTE: Displayed when destination is set, and enables you to restart navigation. When this soft key is pressed, the following window is displayed.

RESTART NAVGATION TO CURRENT WPT. ARE YOU SURE? YES ... PUSH ENTER KNOB NO ... PUSH CLEAR KEY

3-4

3.1.3 Highway display

The highway display, displayed at the lower half of the screen in the combination display, provides a graphic presentation of ship’s track along intended course. It is useful for monit oring ship’s progress toward a waypoint. The own ship marker shows relation between ship and intended course. The XTE monitor shows the direction and amount your vessel is off course – the arrow shows the direction to steer to return to your course and the numeric the distance you are off course. Using the figure below as an example, you would steer right 0.009 nm to return to course. To maintain course, steer the vessel so the own ship marker stays aligned with the intended course line.

Speed over ground, speed through water

3. PLOTTER OPERATION

Time-to-go to destination

Destination waypoint

003WPT

0D 9H 59M

TTG 23th23:59

0.9 nm

Shown (in red on color model) when direction to steer is "left."

Range to destination waypoint

RNG

99.9 nm

10.0

SOG

WPT001

0.009nm

XTE monitor

STW

ETA

Direction to steer (green on color model)

10.0

0.9 nm

Estimated time of arrival at destination

Intended course

Own ship marker

XTE range

Highway display

Soft keys EDIT XT-LMT: Sets the range for the XTE monitor scale. See the procedure on

the previous page for how to set.

RESET XTE: Displayed when destination is set, and enables you to restart navigation. See the description on the previous page.

3-5

3. PLOTTER OPERATION

3.1.4 Nav data display

The nav data display provides comprehensive navigation data. The user may select what data to display and where to display it, on the NAV DATA DISPLAY SETUP menu. For details see paragraph “5.8 Nav Data Display Setup.”

Appropriate sensors are required. Bars ( - -) appear when corresponding sensor is not connected.

Position

POSITION

34° 34. 5678' N

120° 34. 5678'

34° 14. 5678' N

120° 14. 5678'

10.0

9.2°

1324.1

Depth Bearing to

waypoint Speed through

water Waypoint

Position

Full-screen display

Water temperature

SOGWPT POSITION

10.0

COURSESTW

101.6°

RANGEBEARING

0.18

TEMPDEPTH

18.2 °

Range to waypoint

Course

Speed over ground

103

ET A

1st 1:25

2001

FEB 1

Half-screen display

TTGTRIP LOG

0D 2H 30

TIMEDATE

01:27:05

Nav data displays

3-6

3.2 Presentation Mode

Three types of presentation modes are provided for the plotter display: north-up, course-up and auto course-up. To change the presentat ion mode, first press the [HIDE/SHOW] key if the plotter soft keys are not displayed. Press the MODE soft key to select desired mode. Each press of the key changes the present ation mode and presentation m ode indication (top right-hand corner of the screen) cyclically in the sequence of North-up, Course-up and Auto course-up.

3.2.1 North-up

North is at the top of the display and own ship, shown by a filled circle. This mode is useful f or long-range navigation.

34° 22. 3456'N 359.9° 080° 22. 3456'E

TRIP

19.9 kt 99.9 nm

3. PLOTTER OPERATION

16.0nm

WP-002

FISH

BRIDGE

MARK

ENTRY

MODE

NTH UP

NAV

POS

D.BOX ON/ OFF

Plotter display, north-up mode

3-7

3. PLOTTER OPERATION

3.2.2 Course-up

The destination is at the top of the screen when a destination is set. When no destination is set, the course or heading is at the top of the screen at the moment t he course-up mode is selected. A filled triangle marks own ship’s position.

Note: The data sentences GGA and VTG must be output from the NavNet display unit connected to the GPS navigator in order to correctly orient the own ship marker in the course-up mode on ot her NavNet display units.

34° 22. 3456'N 359.9° M

080° 22. 3456'E

16.0nm

WPT 001

19.9 kt 99.9 nm

TRIP

MARK

ENTRY

MODE

CSE UP

CENTER

GO TO CURSOR

Plotter display, course-up mode, destination set

3.2.3 Auto course-up

The course is at the top of screen at the moment the aut o course-up mode is selected. In this mode, t he current course is kept at the top of the screen when the change is within 22.5 degrees. For example, if your vessel turns larger than

22.5 degrees to port or starboard, the chart display will rotate so that your course

is pointing towards the top of the screen again. A filled triangle marks own ship’s position.

34° 22. 3456'N 359.9° M

080° 22. 3456'E

16.0 nm

D. BOX ON/ OFF

19.9 kt 99.9 nm

TRIP

MARK

ENTRY

MODE

AT CU

CENTER

GOTO CURSOR

D. BOX ON/OFF

Plotter display, auto course-up mode

3-8

3.3 Shifting the Display

The plotter display can be shifted on the plotter display as below.

1. Press the cursor pad t o display the cursor.

2. Locate the cursor at a screen edge and press and hold down the cursor pad. The screen shifts in the direction opposite of cursor location.

3. To return the cursor to the screen center, press the CENTER soft key. T his also returns own ship marker to the screen center.

3.4 Chart Scale

Chart scale (range) may be selected with the [RANGE -] or [RANGE +] key. The [-] key expands the chart range; the [+] key shrinks it.

3. PLOTTER OPERATION

Charts scales

0.125 0.25 0.5 1 2 4 8 16 32 64 128 256 512 1024

0.23 0.46 0.93 1.85 3.70 7.41 14.8 29.6 59.3 119 237 474 948 1896

0.144 0.29 0.58 1.15 2.30 4.60 9.21 18.4 36.8 73.7 147 295 589 1178

Note: When the display is expanded or shrunk beyond the range of the chart

card in use the message “NO CHART” appears, along with the appropriate chart icon. See the illustration on the next page for det ails.

3-9

3. PLOTTER OPERATION

3.5 Chart Cards

3.5.1 Chart card overview

Your system reads FURUNO and NavCharts™ (NAVIONICS) charts, or C-MAP charts, depending on its specification.

When you insert a suitable chart card in the slot and your boat is near any chart graphic data, a chart appears. If a wrong card is inserted or a wrong chart scale is selected, land masses will appear hollow. Insert the proper card and select a suitable chart scale. Chart icons appear at the top of the display to help you select a suitable chart scale. The table below shows the chart icons and their meanings.

Chart icons and their meanings

Icon Meaning

Proper card is not inserted or chart scale is too small. Operate the RANGE key to adjust chart scale.

Chart scale is too large. Operate the RANGE key to adjust chart scale.

Suitable chart scale is selected.

3-10

3.5.2 Indices and chart enlargement

When the [RANGE] key is operated, you will see several frames appear on the chart. These frames are called indices and they show you what parts of the chart can be zoomed in on.

Sample chart (Japan) showing indices

3. PLOTTER OPERATION

When a chart cannot be displayed

A chart will not be displayed in the following conditions:

When the chart scale is too large or too small.

•

When scrolling the chart outside the indices.

•

When this happens, select proper chart scale.

Note: Indices can be turned on or off with “Chart border line.” See page 5-13 for

FURUNO and NAVIONICS charts and 5-16 for C-MAP charts.

3-11

3. PLOTTER OPERATION

3.5.3 FURUNO and NavCharts

Chart symbols

The table below shows FURUNO and NavCharts meanings.

™

mini chart symbols and their

™

Chart symbols

Symbol Description

Summit

Wreck

Lighthouse

Lighted Buoy

Buoy

Radio Station

Data for aids to navigation

Selected FURUNO and NavCharts

charts can show buoy and lighthouse data.

™

Symbol Description

Position of Sounding

Obstruction

Fishing Reef

Platform

Anchorage

Simply place the cursor on the lighthouse or buoy mark.

Place the cursor on a lighthouse or buoy mark.

Lighthouse mark

Example of data displayed

Range and bearing from own ship

Period (ex.: 6 seconds)

Visibility in nautical mile (ex.: 12 miles)

NAVAID: /FL 6S 12M FROM OS 52.38nm 48.0°

FL : Flashing F : Fixed light F FL : Fixed and Flashing light MO : Morse code light Oc : Occulting light

Example of buoy, lighthouse data

3-12

3. PLOTTER OPERATION

Port service icons (NavCharts™ only)

show services available at ports, with icons. Use the cursor pad to

NavCharts

™

place the cursor on the sailboat icon (denotes a port or harbor), and then push the [ENTER] knob. The services available appear at the top of the display.

Detailed information of service selected

List of services at the port selected

34° 22. 3456'N 359.9°M

080° 22. 3456'E

FIRST AID

16.0nm

19.9 kt 99.9 nm

TRIP

Emergency medical service

Fueling station

CANCEL

Sailboat icon (Port)

Water supply station

Customer service station

Port

Traveler's service station

Marine equipment service

Information center

Plotter display, showing port service display

3-13

3. PLOTTER OPERATION

3.5.4 C-MAP cards

Cursor and data display

Besides its fundamental functions of providing position data, the cursor can also show caution area, depth area, source of data, etc. on C-map charts. In addition, you can display information about an icon by placing the cursor on it.

1. Press the cursor pad t o t urn the cursor on.

2. Use the cursor pad to place the cursor on the position desired.

3. Push the [ENTER] knob to open the Objects window.

Objects Navigation mark, fixed

Beacon, generic

Light

Light Depth area Source of data

Objects window

4. Use the cursor pad to select the item desired.

5. Push the [ENTER] knob to display details for object selected.

Navigation Mark, fixed

Light

Color

White

Height

12.0 Meters

Light characteristic

flashing

Sectorlimit one

64.0 Degrees

Sectorlimit two

138.0 Degrees

Signal group

(3)

Signal period

10.0 Seconds

Example of caution area window

6. Press the RETURN soft key to close the window.

7. Repeat step 4 to 6 to select other item.

8. Press the [ MENU] key to close t he menu.

3-14

3. PLOTTER OPERATION

Icon data

You may place the cursor on any icon to find informat ion about the selected icon.

1. For example, place the cursor on a lighthouse icon.

Place the cursor on a lighthouse icon.

34° 22. 3456'N 359.9°M

080° 22. 3456'E

16.0nm

19.9 kt 99.9 nm

TRIP

MARK

ENTRY

MODE

NTH UP

CENTER

GO TO CURSOR

D. BOX ON /OFF

Lighthouse icon

2. Push the [ENTER] knob to show data. For example, the following window appears for a lighthouse.

Objects Lighthouse

Tower

Light Underwater Lock Depth contour Depth contour Depth area Source of data

Object windows

3. Use the cursor pad to select the item desired.

4. Push the [ENTER] knob to display detailed inform ation.

3-15

3. PLOTTER OPERATION

5. Press the RET URN soft key to close the Objects window.

Tide information

The C-MAP chart card provides for calculation of the tide heights for any date. Additionally it displays the times of sunrise and sunset.

1. Press the cursor pad to place the cursor on a Tide icon (

2. Push the [ENTER] knob to open the Objects window.

Navigation mark, fixed Light.

Color white Height

7. 00 Meters Light characteristic occulting XXXXXXXX XXXXXXXX

Sample lighthouse data

34 24. 3456 N 359.9 NU

OBJECTS

124 24. 3456 W 59.9kt 024nm

Tide height

Cartographic area Source of data

RETURN

Objects window

3. Use the cursor pad t o select “Tide height.”

4. Push the [ENTER] knob to open the TIDE window.

3-16

Furuno 1742c, 1752c, 1762, 1762c, 1742 User Manual

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 Cursor Pad, Cursor

1.5 Display Brilliance, Panel Brilliance, Contrast, Hue

1.6 Selecting a Display

1.7 Data Boxes

1.8 Function Keys

1.9 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

2.6 Reducing Precipitation Clutter

2.7 Range Scale

2.8 Pulselength

2.9 Presentation Mode

2.10 Measuring the Range

2.11 Measuring the Bearing

2.12 Erasing the Heading Line, North Marker

2.13 Reducing Noise

2.14 Reducing Radar Interference

2.15 Zoom

2.16 Shifting the Picture

2.17 Using the Offset EBL

2.18 Echo Trails

2.19 Echo Stretch

2.20 Echo Averaging

2.21 Outputting TLL Data

2.22 Guard Alarm

2.23 Watchman

2.24 Waypoint Marker

2.25 ARP (option), TTM operation

2.26 Interpreting the Radar Display

3. PLOTTER OPERATION

3.1 Plotter Displays

3.2 Presentation Mode

3.3 Shifting the Display

3.4 Chart Scale

3.5 Chart Cards