Furuno Radar Detector 1942 MARK 2 User Manual

MARINE RADAR

1932 MARK-2/1942 MARK-2

MODEL

Download from Www.Somanuals.com. All Manuals Search And Download.

Your Loc al A gent/Deal er

9 - 5 2 , A s h i h a r a - c h o ,

N i s h i n o m i y a , J a p a n

Tel ephone:

Tel efax :

0798- 65- 2111

0798- 65- 4200

FIRST EDITION

AUG. 1998

APR. 3, 2001

Printed in Japan

PUB. No. OME-34620

M O DE L1932/1942 M A RK - 2

(YOSH)

Download from Www.Somanuals.com. All Manuals Search And Download.

CAUTION

Do not use the equipment for other than

its intended purpose.

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel

should work inside the

equipment.

Use of the equipment as a stepping stool,

for example, can result in personal injury

or equipment damage.

Turn off the radar power

switch before servicing the

scanner unit. Post a warn-

ing sign near the switch

indicating it should not be

turned on while the scanner

unit is being serviced.

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.

Prevent the potential risk of

being struck by the rotating

scanner and exposure to

RF radiation hazard.

Two warning labels are attached to the display

unit and scanner unit. Do not remove these labels.

If labels are peeling off or are illegible, contact

a FURUNO agent or dealer.

Do not disassemble or modify the

equipment.

WARNING

To avoid electrical shock, do not

remove cover. No user-serviceable

parts inside.

Fire, electrical shock or serious injury can

result.

Name: Warning Label (1)

Type: 86-003-1011-0

Code no.: 100-236-230

Turn off the power immediately if water

leaks into the equipment or the equip-

ment is emitting smoke or fire.

Name: Radiation Warning

Label

Type: 03-142-3201-0

Code no.: 100-266-890

Continued use of the equipment can cause

fire or electrical shock.

WARNING

Radiation hazard. Only qualified

personnel should work inside scanner.

Confirm that TX has stopped before

opening scanner.

Use the proper fuse.

Fuse rating is shown on the equipment.

Use of a wrong fuse can result in equipment

damage.

Keep heater away from equipment.

Heat can alter equipment shape and melt

the power cord, which can cause fire or

electrical shock.

Download from Www.Somanuals.com. All Manuals Search And Download.

FOREWORD

Congratulations on your choice of the

FURUNO MODEL 1932/1942 MARK-2 Ma-

rine Radar. We are confident you will see why

the FURUNO name has become synony-

mous with quality and reliability.

Features

Your radar has a large variety of functions,

all contained in a remarkably small cabinet.

The main features of the MODEL 1932/1942

MARK-2 are:

For over 50 years FURUNO Electric Com-

pany has enjoyed an enviable reputation for

innovative and dependable marine electron-

ics equipment. This dedication to excellence

is furthered by our extensive global network

of agents and dealers.

¡ Traditional FURUNO reliability and qual-

ity in a compact, lightweight and low-cost

radar.

¡ Durable brushless scanner motor.

¡ On-screen alphanumeric readout of all op-

Your radar is designed and constructed to

meet the rigorous demands of the marine en-

vironment. However, no machine can per-

form its intended function unless properly

installed and maintained. Please carefully

read and follow the recommended proce-

dures for, operation and maintenance.

erational information.

¡ Standard features include EBL (Electronic

Bearing Line), VRM (Variable Range

Marker), Guard Alarm, Display Off Cen-

ter, and Echo Trail.

¡ Watchman feature periodically transmits

the radar to check for radar targets which

may be entering the alarm zone.

We would appreciate hearing from you, the

end-user, about whether we are achieving

our purposes.

¡ Ship’s position in latitude and longitude

and Loran C Time Differences, range and

bearing to a waypoint, and ship’s speed/

heading/course can be shown in the bot-

tom text area. (Requires a navigation aid

which can output such data in IEC 61162

format.)

Thank you for considering and purchasing

FURUNO equipment.

¡ Zoom feature provided.

¡ Optional Auto Plotter ARP-10 acquires

and automatically tracks 5 targets plus 5

targets manually, or 10 targets manually.

iii

Download from Www.Somanuals.com. All Manuals Search And Download.

TABLE OF CONTENTS

3.5 Suppressing Radar Interference .... 3-3

3.6 Selecting Pulsewidth ...................... 3-4

3.7 Guard Alarm ................................... 3-4

3.8 Watchman ...................................... 3-5

3.9 Displaying Navigation Data ............ 3-6

3.10 OTHER MENU Description .......... 3-7

3.11 Function Controls ......................... 3-8

3.12 Suppressing Noise ....................... 3-8

3.13 Adjusting Brilliance of Markers ..... 3-8

3.14 Outputting Target Position............ 3-8

3.15 Dead Sector ................................. 3-8

FOREWORD.............................. iii

MENU TREE ............................... v

TABLE OF CONTENTS BY

INDICATION, MARKER............. vi

SYSTEM CONFIGURATION .... vii

1. PRINCIPLE OF OPERATION

1.1 What is Radar?............................... 1-1

1.2 How Ships Determined Position

Before Radar ................................. 1-1

1.3 How Radar Determines Range ...... 1-1

1.4 How Radar Determines Bearing..... 1-1

4. FALSE ECHOES

4.1 Multiple Echoes .............................. 4-1

4.2 Side-lobe Echoes ........................... 4-1

4.3 Indirect Echoes .............................. 4-2

4.4 Blind and Shadow Sectors ............. 4-2

1.5 Radar Wave Speed and Scannner

Rotation Speed .............................. 1-1

1.6 The Radar Display ......................... 1-1

4.5 SART (Search and Rescue

2. BASIC OPERATION

Transponder) ................................. 4-5

2.1 Control Description......................... 2-1

2.2 Turning the Radar On/Off............... 2-2

2.3 Transmitting.................................... 2-2

2.4 Stand-by......................................... 2-2

2.5 Selecting the Range....................... 2-3

2.6 Adjusting Picture Brilliance............. 2-3

2.7 Adjusting Receiver Sensitivity ........ 2-3

5. MAINTENANCE & TROUBLE-

SHOOTING

5.1 Preventive Maintenance ................. 5-1

5.2 Replacing the Fuse ........................ 5-1

5.3 Troubleshooting .............................. 5-2

5.4 Self Test.......................................... 5-3

5.5 Life Expectancy of Magnetron ........ 5-3

2.8 Adjusting the A/C SEA Control

(reducing sea clutter) ..................... 2-3

2.9 Adjusting the A/C RAIN Control

(reducing rain clutter) ..................... 2-4

6. OPERATION OF ARP-10

(OPTION)

2.10 Erasing the Heading Marker,

North Marker................................ 2-5

6.1 General .......................................... 6-2

6.2 ARP-10 MENU Operation .............. 6-2

6.3 Acquiring Targets............................ 6-4

6.4 Displaying Target Data ................... 6-5

6.5 Mode and Length of Vectors .......... 6-6

6.6 Past Position Display...................... 6-6

6.7 Operational Warnings..................... 6-6

2.11 Measuring the Range ................... 2-5

2.12 Measuring the Bearing ................. 2-6

2.13 Using the Offset EBL.................... 2-6

2.14 Offcentering the Picture................ 2-7

2.15 Zoom ............................................ 2-8

3. MENU OPERATION

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

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

3.1 Basic Menu Operation.................... 3-1

3.2 Selecting the Presentation Mode ... 3-1

3.3 Magnifying Long Range Echoes

(echo stretch) ................................. 3-2

Declaration of Conformity

(MODEL 1932 MARK-2)

3.4 Echo Trail ....................................... 3-2

Declaration of Conformity

(MODEL 1942 MARK-2)

Download from Www.Somanuals.com. All Manuals Search And Download.

MENU TREE

MENU KEY

RINGS (Off, 1, 2, 3, max)

EBL OFFSET (Off, On)

SHIFT (Off, On)

1. Display

2. All Cancel

3. Vector ref

4. Vector Length

5. History

6. CPA SET

7. TCPA SET

8. AUTO ACQ

ZOOM (Off, On)

MODE (HU, CU, NU, TM)

DISP DATA

ECHO TRAIL (Off, On)

ECHO STRTCH (Off, ES1, ES2)

ARP-10 MENU

(Options)

OTHER MENU

Panel Dimmer (1, 2, 3, 4)

Mark Brill (1, 2, 3, 4)

HD Mark (1, 2, 3, 4)

Characters (1, 2, 3, 4)

Trail Tone (Single, Multi)

Int Reject (Off, 1, 2, 3)

Pulselength (Short, Long)

Noise Reject (Off, On)

Trail Time

(15S, 30S, 1M, 3M, 6M, 15M, 30M, Cont)

Tune (Auto, Manu)

Disp Data (Off, Nav, ARP, All)

WPT Mark (Off, On)

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

EBL Ref (Rel, True)

VRM Unit (nm, km, sm)

Watchman (Off, 5M, 10M, 20M)

STBY DISP (Norm, Econo, Nav)

Guard Mode (In, Out)

Own Position (L/L, TD)

Cursor Posi (B/R, L/L)

Alm Sense LV (Low, Mid, High)

Dead Sector (Off, On)

Range

36, 48) :1932 M2

36, 48, 64) :1942 M2

(1/8, 1/4, 1/2, 3/4, 1, 1.5,

2, 3, 4, 6, 8, 12, 16, 24,

Self Test

23.

24.

Installation Setup

1.Nav Talker (All, GPS, LC)

2.Depth Unit (m, fa, ft)

3.Temp Unit (¡C, ¡F)

4.Hdg Sensor (Magnet, Gyro)

5.Key Beep (Off, On)

6.Scan Stop (Rotate, Stop)

7.Dead Sector

: Defaut settings

8.Tune/Video Adjustment

9.Heading Alignment

10.Sweep Timing Adjustment

11.MBS Adjustment

12.Ant Height (Low, Mid, High)

13.STC Curve (Sharp, Std, Gntl)

14.Ope Mode (Master, Slave)

15.Hours in Use

16.TX Hours

Download from Www.Somanuals.com. All Manuals Search And Download.

TABLE OF CONTENTS BY

INDICATION, MARKER

Tuning indicator (P.3-7)

Echo trail elapsed time (P.3-3)

Heading (requires heading data)

Heading marker (P.2-5)

Echo trail time (P.3-3)

Guard Zone (P.3-4)

Zoom (P.2-8)

AUTO

HDG 234.5¡

TRAIL

Range (P.2-3)

25 : 38

. 125NM

Echo Stretch (P.3-2)

30M

G (OUT)

ZOOM

0625

Range ring interval (P.2-3)

Pulselength (P.2-3)

ES1

OFFCENTER

Off center (P.2-7)

Display mode (P.3-1)

Cursor (P.2-5, 2-6)

EBL2 (P.2-6)

Guard zone area (P.3-5)

EBL1 (P.2-6)

VRM1 (P.2-5)

Range ring (P.2-3, 2-5)

VRM2 (P.2-5)

North marker (P.2-5)

A/C

AUTO

EBL

345.6¡ R

23.0¡ R

A/C AUTO (P.2-4)

IR2

VRM

0.048NM

0.100NM

EBL1 bearing (P.2-6)

EBL2 bearing (P.2-6)

13.5¡ R

0.142NM

Interference rejector (P.3-3)

Cursor bearing (P.2-6)

VRM1 range (P.2-5)

VRM2 range (P.2-5)

Cursor range (P.2-5)

Download from Www.Somanuals.com. All Manuals Search And Download.

SYSTEM CONFIGURATION

Scanner Unit

MODEL 1932 MARK-2

XN10A-RSB-0070-064 (24 rpm)

XN10A-RSB-0073-064 (48 rpm)

MODEL 1942 MARK-2

XN12A-RSB-0070-059 (24 rpm)

XN12A-RSB-0073-059 (48 rpm)

Navigation

device

IEC 61162* (In/Out)

Display Unit

Radar Plotter

RP-110

RDP-118

Video Sounder

Remote Display

FMD-811/1800

Gyro-

compass

Gyro Converter

AD-100

Auto Plotter

ARP-10

(24 rpm only)

External Alarm

Buzzer OP03-21

Integrated Heading

Sensor PG-1000

12 VDC: 10A

24/32 VDC: 5A

*Equivalent to NMEA 0183

Rectifier

RU-3423

: Option

: Local Supply

12/24/32 VDC

115/230 VAC

Note: Even though the display unit meets waterproof standard IPX-5, the connection of ex-

ternal buzzer, radar plotter and/or remote display can affect waterproofness. Watertight integ-

rity cannot be guaranteed. When these modification has been done, the display unit should

not be mounted where exposed.

vii

Download from Www.Somanuals.com. All Manuals Search And Download.

1. PRINCIPLE OF OPERATION

1.1 What is Radar?

1.4 How Radar Determines

Bearing

The term “RADAR” is an acronym meaning

Radio Detection And Ranging. Although the

basic principles of radar were developed dur-

ing World War II, echoes as an aid to naviga-

tion is not a new development.

The bearing to a target found by the radar is

determined by the direction in which the ra-

dar scanner is pointing when it emits an elec-

tronic pulse and then receives a returning

echo. Each time the scanner rotates pulses

are transmitted in the full 360 degree circle,

each pulse at a slightly different bearing from

the previous one. Therefore, if one knows the

direction in which the signal is sent out, one

knows the direction from which the echo must

return.

1.2 How Ships Determined

Position Before Radar

Before the invention of radar, when running

in fog near a rugged shoreline, ships would

sound a short blast on their whistles, fire a

shot, or strike a bell. The time between the

origination of the sound and the returning of

the echo indicated how far the ship was from

the cliffs or the shore. The direction from

which the echo was heard indicated the rela-

tive bearing of the shore.

1.5 Radar Wave Speed and

Scanner Rotation Speed

Note that the speed of the radar waves out

to the target and back again as echoes is

extremely fast compared to the speed of ro-

tation of the scanner. By the time radar ech-

oes have returned to the scanner, the amount

of scanner rotation after initial transmission

of the radar pulse is extremely small.

1.3 How Radar Determines

Range

Radar determines the distance to the target

by calculating the time difference between the

transmission of a radar signal and the recep-

tion of the reflected echo. It is a known fact

that radar waves travel at a nearly constant

speed of 162,000 nautical miles per second.

Therefore the time required for a transmitted

signal to travel to the target and return as an

echo to the source is a measure of the dis-

tance to the target. Note that the echo makes

a complete round trip, but only half the time

of travel is needed to determine the one-way

distance to the target. This radar automati-

cally takes this into account in making the

range calculation.

1.6 The Radar Display

The range and bearing of a target is displayed

on what is called a Plan Position Indicator

(PPI). This display is essentially a polar dia-

gram, with the transmitting ship’s position at

the center. Images of target echoes are re-

ceived and displayed at their relative bear-

ings, and at their distance from the PPI center.

With a continuous display of the images of

targets, the motion of the transmitting ship is

also displayed.

1-1

Download from Www.Somanuals.com. All Manuals Search And Download.

Heading marker

Targets

Range and bearing

of a target, relative

to own ship, are

readable on the PPI.

Own ship

in center

Own ship

(radar)

(A) Bird's eye view of situation

(B) Radar picture of (A)

Figure 1-1 How radar works

1-2

Download from Www.Somanuals.com. All Manuals Search And Download.

2. BASIC OPERATION

2.1 Control Description

Omnipad

Requires Auto Plotter ARP-10

Brief press:

Displays the data of target

selected with the cursor.

Shifts cursor, VRM and EBL;

selects items and options on

menu.

Long press:

Terminates plotting of the target

selected with the cursor.

(1) Acquires the target selected

with the ominipad. (Requires

Auto Plotter ARP-10.)

(2) Registers selection on

menus.

SELECT

CANCEL

ACQ

ENTER

Opens/closes menus.

Selects

EBL1/EBL2/VRM1/VRM2.

Sets guard zone area.

GUARD

Control:

Adjusts sensitivity.

Selects radar range.

RANGE

Switch:

EBL/VRM

SELECT

EBL/VRM

CONTROL

Temporarily erases heading

marker (and north marker if

displayed).

Enables/erases

EBL1/EBL2/EBL3/EBL4.

GAIN

TLL

Outputs target position data.

Control:

Reduces sea clutter.

Switch*:

HM-OFF

Automatically reduces sea and

rain clutters.

A/C SEA

A/C AUTO

BRILL

(Long press) Shifts your vessel s

position to cursor location.

(Brief press) Doubles size of

area between your vessel and

location selected by cursor.

Adjusts display brilliance.

A/C RAIN

ST BY

Sets radar in stand-by;

transmits radar pulse.

Control:

Reduces rain clutter.

Switch*:

Displaces the EBL origin.

Turns power on/off.

POWER

Lights when the economy mode

is on.

*Default switch function.

Figure 2-1 Control panel

2-1

Download from Www.Somanuals.com. All Manuals Search And Download.

2.2 Turning the Radar On/Off

2.4 Stand-by

Press the [POWER] key to turn the radar on

or off.

When you won’t be using the radar for an

extended period, but you want to keep it in a

state of readiness, place it in stand-by by

pressing the [STBY TX] key. The display

shows “STBY,” navigation data, or goes into

the economy mode depending on menu set-

ting. (More on menu operation later.)

The control panel lights and a timer displays

the time remaining for warm up of the mag-

netron (the device which produces radar

pulses), counting down from 1:30 to 0:01.

Economy mode

2.3 Transmitting

The CRT can be set to automatically turn it-

self off when in stand-by, to reduce power

consumption. This feature is called the

“economy mode.” Power consumption in the

economy mode is 28 W. When the economy

mode is on, the lamp next to the [POWER]

key lights.

After the power is turned on and the magne-

tron has warmed up, STBY (Stand-By) ap-

pears at the screen center. This means the

radar is now fully operational.

Press the [STBY TX] key to transmit.

When transmitting, any echoes from targets

appear on the display. This radar displays

echoes in eight tones of green according to

echo strength.

Navigation data display during

stand-by

If a navigation aid inputs navigation data to

this radar in IEC 61162 format, navigation

data can be displayed during stand-by. You

can turn the navigation data display on/off

through the menu. Figure 2-2 shows a typi-

cal navigation data display during stand-by.

SPEED

TRIP

Time-to-go to Stand-by

Trip distance since power on

ST-BY

000.3 nm

Speed

10.5

DEPTH

^TEMPERA+^TU1^RE7.3

Depth

125

°C

Temperature

TO Waypoint

bearing

HDG

Heading

Time-to-go to

092.5°

Course

CRS 180.0°M

WPT

BRG

RNG

TTG

01:08

TO Waypoint

45.0° M

12.0NM

Bearing to TO

Waypoint

OWN SHIP

LAT 30°00.00N

LON 135°00.00E

Ship's position in latitude

and longitude and Loran

TDs

36378.1

59096.4

Range to TO Waypoint

XTE

R 0.3NM

Cross Track Error

Mark "

direction and amount of

error.

" shows

L XTE

XTE

Figure 2-2 Typical navigation data display

during stand-by

2-2

Download from Www.Somanuals.com. All Manuals Search And Download.

Note1:Availability of a particular display item

depends on incoming data.

2.7 Adjusting Receiver

Sensitivity

Note2: When Range to Waypoint reaches 0.1

nm, the WPT marker jumps to dead ahead

even though a difference may exist between

heading and BRG to WPT.

The [GAIN] control adjusts the sensitivity of

the receiver. It works in precisely the same

manner as the volume control of a broadcast

receiver, amplifying the signals received.

Note3: When cross track error exceeds 1 nm

on either side, the XTE mark starts blinking.

The proper setting is such that the back-

ground noise is just visible on the screen. If

you set up for too little sensitivity, weak ech-

oes may be missed. On the other hand ex-

cessive sensitivity yields too much

background noise; strong targets may be

missed because of the poor contrast between

desired echoes and the background noise on

the display.

2.5 Selecting the Range

The range selected automatically determines

the range ring interval, the number of range

rings, pulselength and pulse repetition rate,

for optimal detection capability in short to long

ranges.

To adjust receiver sensitivity, transmit on long

range, and adjust the [GAIN] control so back-

ground noise is just visible on the screen.

You can select which ranges and pulselength

(for 1.5 and 3 mile ranges) to use through

the menu. The range, range ring interval and

pulselength appear at the top left-hand cor-

ner of the display.

2.8 Adjusting the A/C SEA

Control

(reducing sea clutter)

To select a range;

Echoes from waves can be troublesome, cov-

ering the central part of the display with ran-

dom signals known as “sea clutter.” The

higher the waves, and the higher the scan-

ner above the water, the further the clutter

will extend. Sea clutter appears on the dis-

play as many small echoes which might af-

fect radar performance. (See the left-hand

figure in Figure 2-3.) When sea clutter masks

the picture, adjust the [A/C SEA] control to

reduce the clutter.

Press the [- RANGE +] key. The range and

range ring interval appear at the top left cor-

ner of the display.

Tips for selecting the range

¡ When navigating in or around crowded

harbors, select a short range to watch for

possible collision situations.

¡ If you select a lower range while on open

water, increase the range occasionally to

watch for vessels that may be heading

your way.

How the A/C SEA control works

The [A/C SEA] control reduces the amplifi-

cation of echoes at short ranges (where clut-

ter is the greatest) and progressively

increases amplification as the range in-

creases, so amplification will be normal at

those ranges where there is no sea clutter.

2.6 Adjusting Picture Brilliance

The [BRILL] key adjusts the brilliance of the

radar picture in sixteen levels. The current

level momentarily appears on the screen

whenever the [BRILL] key is pressed.

2-3

Download from Www.Somanuals.com. All Manuals Search And Download.

Adjusting the A/C SEA control

2.9 Adjusting the A/C RAIN

Control

The proper setting of the A/C SEA should be

such that the clutter is broken up into small

dots, and small targets become distinguish-

able.

(reducing rain clutter)

The vertical beamwidth of the scanner is de-

signed to see surface targets even when the

ship is rolling. However, by this design the

scanner will also detect rain clutter (rain,

snow, hail, etc.) in the same manner as nor-

mal targets. Figure 2-4 shows the appear-

ance of rain clutter on the display.

If the control is set too low, targets will be

hidden in the clutter, while if it is set too high,

both sea clutter and targets will disappear

from the display. In most cases adjust the

control until clutter has disappeared to lee-

ward, but a little is still visible windward.

1. Confirm that the sensitivity is properly ad-

justed, and then transmit on short range.

Adjusting A/C RAIN

When rain clutter masks echoes, adjust the

[A/C RAIN] control. This control splits up

these unwanted echoes into a speckled pat-

tern, making recognition of solid targets

easier.

2. Adjust the [A/C SEA] control so small tar-

gets are distinguishable but some clutter

remains on the display.

Sea clutter at

display center

A/C SEA control adjusted;

sea clutter suppressed.

Appearance of

rain clutter

A/C RAIN control adjusted;

rain clutter suppressed.

Figure 2-3 How to adjust the A/C SEA

control

Figure 2-4 Effect of A/C RAIN

Tip for adjusting the A/C SEA

Note: In addition to reducing clutter, the [A/C

RAIN] control can be used in fine weather to

clarify the picture when navigating in confined

waters. However, with the circuit activated the

receiver is less sensitive. Therefore, turn off

the circuit when its function is not required.

A common mistake is to over-adjust the cir-

cuit so all the clutter is removed. As an ex-

ample set up for maximumA/C SEA. You will

see how the center of the display becomes

dark. This dark zone can be dangerous (tar-

gets may be missed), especially if the sensi-

tivity is not properly adjusted.Always leave a

little clutter visible on the display to be sure

weak echoes will not be suppressed. If there

is no clutter visible on the display, turn off the

circuit.

Automatic adjustments of A/C SEA

and A/C RAIN

Push the [A/C AUTO] key. “A/C AUTO” ap-

pears at the bottom left-hand corner of the

display when theA/CAUTO circuit is on. You

can fine tune by adjusting the [A/C SEA], [A/

C RAIN] and [GAIN] controls.

CAUTION

Turn off the A/C SEA control when

its use is not required; the control

can erase weak targets.

2-4

Download from Www.Somanuals.com. All Manuals Search And Download.

Measuring range by VRM

2.10 Erasing the Heading

Marker, North Marker

1. Press the [EBL/VRM SELECT] key to cir-

cumscribe a VRM readout (at the bottom

right-hand corner). Each press of the key

selects the readout of EBL1, EBL2, VRM1

or VRM2 in that order.

The heading marker or north marker (avail-

able with gyrocompass connection) may oc-

casionally mask a target. To view the target,

you can temporarily erase the heading

marker and north marker by pressing and

holding down the [GAIN (HM OFF)] control.

Release the control to re-display the mark-

ers.

VRM

5.3°NM

12.5°NM

EBL

345.6°R

23.0°R

Figure 2-6 Display bottom, showing

location of EBL and VRM readouts

2. Press the [EBL/VRM CONTROL] key to

enable control of the VRM by the

omnipad.

Heading

marker

3. Operate the omnipad to place the outside

edge of the VRM on the inside edge of

the target. The omnipad must be oper-

ated within five seconds after pressing the

[EBL/VRM CONTROL] key, otherwise the

VRM cannot be operated.

North

marker

Figure 2-5 Heading marker and north marker

4. Check the VRM readout at the bottom

right-hand corner of the display to find the

range to the target.

2.11 Measuring the Range

5. To anchor the VRM, press the [EBL/VRM

CONTROL] key.

You can measure the range to a target three

ways: by the range rings, by the cursor, and

by the VRM (Variable Range Marker).

To erase the VRM, press and hold down the

[EBL/VRM CONTROL] key about two sec-

onds.

Measuring range by range rings

Range

6.0 NM

Range ring

interval

2.0

Count the number of rings between the cen-

ter 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.

Target

Cursor

VRM1

VRM2

Measuring range by cursor

VRM1

range

VRM

4.0 NM

3.0 NM

Operate the omnipad to place the cursor in-

tersection on the inside edge of the target

echo. The range to the target, as well as the

bearing, appears at the bottom of the display.

Cursor range

4.0 NM

VRM2

range

Figure 2-7 Measuring range by the cursor,

range rings and VRM

Note: You can display the range readout of

the VRM and cursor in nautical miles, stat-

ute miles or kilometers. For details see the

next chapter.

2-5

Download from Www.Somanuals.com. All Manuals Search And Download.

Note:The bearing readout for the EBL andthe

cursor can be displayed in relatiive or true

bearing (true bearing requires heading sen-

sor input). For north up and course up dis-

play modes the bearing reference is always

true. For details see the next chapter.

2.12 Measuring the Bearing

There are two ways to measure the bearing

to a target: by the cursor, and by the EBL

(Electronic Bearing Line).

Measuring bearing by cursor

Tips for measuring bearing

Operate the omnipad to bisect the target with

the cursor intersection. The bearing to the

target appears at the bottom of the display.

¡ Bearing measurements of smaller targets

are more accurate; the center of larger

target pips is not as easily identified.

¡ Bearings of stationary or slower moving

targets are more accurate than bearings

of faster moving targets.

Measuring bearing by EBL

1. Press the [EBL/VRM SELECT] key to cir-

cumscribe an EBL readout (at the bottom

left-hand corner). Each press of the key

selects the readout of EBL1, EBL2, VRM1

or VRM2 in that order.

¡ To minimize bearing errors keep echoes

in the outer half of the picture by chang-

ing the range scale; angular difference

becomes difficult to resolve as a target

approaches the center of the display.

2. Press the [EBL/VRM CONTROL] key to

enable control of the EBL by the omnipad.

3. Operate the omnipad to bisect the target

with the EBL. The omnipad must be op-

erated within five seconds after pressing

the [EBL/VRM CONTROL] key, otherwise

the EBL cannot be operated.

2.13 Using the Offset EBL

The offset EBL provides two functions: pre-

dict collision course of a radar target and mea-

sure the range and the bearing between two

targets.

4. Check the EBL readout at the bottom left-

hand corner of the display to find the bear-

ing to the target.

Predicting collision course

5. To anchor the EBL, press the [EBL/VRM

CONTROL] key.

1. Operate the omnipad to place the cursor

on the center of the target.

To erase the EBL and its readout, press and

hold down the [EBL/VRM CONTROL] key

about two seconds.

2. Press the [EBL/VRM SELECT] key to

choose the EBL1 readout, and then press

the [EBL/VRM CONTROL] key.

6.0 NM

2.0

Target

3. Press the [MENU] key, select EBL OFF-

SET from the menu, and then press the

[ACQ/ENTER] key.

Cursor

EBL1

4. Press the [EBL/VRM CONTROL] key.

EBL2

5. Oparate the omnipad so EBL1 passes

through the center of the target.

Cursor

If the target tracks along the EBL towards the

center of the display (your vessel’s position),

the target may be on a collision course.

bearing

EBL

40.0° R

135.0° R

EBL1 bearing

40.0°R 4.0 NM

To cancel the offset EBL, select EBL OFF-

SET from the menu and press the [ACQ/

ENTER] key.

Figure 2-8 How to measure bearing by EBL

and cursor

2-6

Download from Www.Somanuals.com. All Manuals Search And Download.

6.0 NM

2.0

EBL1

EBL1 origin

(initial position

of target)

VRM1

Target moved

here.

Offset EBL

(EBL1)

EBL

70.0° R

VRM

6.0 NM

EBL1

bearing

VRM1

range

VRM

4.5 NM

EBL1

bearing

70.0° R

VRM1

range

Figure 2-9 Predicting collision course by

using the offset EBL

Figure 2-10 Measuring the range and

bearing between two targets by using the

offset EBL

Measuring range and bearing

between two targets

The procedure which follows shows how to

measure the range and bearing between tar-

get “A” and target “B” in Figure 2-10.

2.14 Offcentering the Picture

Your vessel’s position can be offcentered to

75% of the range in use to view the situation

around your vessel without changing the

range or size of targets.

1. Operate the omnipad to place EBL1’s ori-

gin (cursor) on the center of target “A.”

2. Press the [EBL/VRM SELECT] key to

choose the EBL1 readout and then press

the [EBL/VRM CONTROL] key.

1. Press the omnipad to set the cursor where

desired.

2. Press the [F1 (A/C SEA)] control if its func-

tion is set for SHIFT (default setting), or

select SHIFT from the menu.

OFFCENTER appears at the top right

corner of the display when the picture is

offcentered.

3. Press the [MENU] key, select EBL OFF-

SET from the menu, and then press the

[ACQ/ENTER] key. EBL1’s origin shifts to

cursor location.

4. Press the [EBL/VRM CONTROL] key.

5. Operate the omnipad to bisect target “B”

with EBL1. Check the EBL1 readout to

find the bearing between target “A” and

target “B.”

6. Press the [EBL/VRM SELECT] key to

choose the VRM1 readout. Operate the

omnipad to place the outside edge of

VRM1 on the inside edge of target “B.”

Check the VRM1 readout to find the range

between target “A” and target “B.”

Cursor

2 Press [F1] to offcenter

1 Pleace cursor

display.

where desired.

7. To cancel the offset EBL, select EBLOFF-

SET from the menu, and then press the

[ACQ/ENTER] key.

Figure 2-11 Offcentering the picture

Cancelling offcentered picture

Press the [F1 (A/C SEA)] control (if function

is SHIFT).

2-7

Download from Www.Somanuals.com. All Manuals Search And Download.

2.15 Zoom

The zoom feature allows you to double the

size of the area between your vessel and any

location within the current range to take a

closer look at an area of interest.

1. Select location with the cursor.

2. Press and hold down the [F1 (A/C SEA)]

control about two seconds if its function

is set for ZOOM (default setting), or se-

lect ZOOM from the menu. Zoom appears

at the top right corner when the ZOOM

function is on.

Cursor

Press [F1] to zoom.

Place cursor

where desired.

Figure 2-12 Zoom function

Note: Zoom is cancelled when range or pre-

sentation mode is changed.

Cancelling zoom

Press the [F1 (A/C SEA)] control again.

2-8

Download from Www.Somanuals.com. All Manuals Search And Download.

3. MENU OPERATION

3.1 Basic Menu Operation

3.2 Selecting the Presentation

Mode

The menu mostly contains less-often used

functions which once preset do not require

regular adjustment. To open or close the

menu, press the [MENU] key. You can select

items and options from the menu with the

omnipad. The complete menu appears on

page v.

With heading sensor connection, this radar

provides four presentation modes: head-up,

course-up, north-up and true motion.

1. Press the [MENU] key.

2. Operate the omnipad to select “MODE.”

3. Press the [ACQ/ENTER] key.

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

menu.

The display and the display mode indication

at the top left-hand corner of the display

change in the sequence of HU (heading up),

CU (course up), NU (north up) and TM (true

motion) when the [ACQ/ENTER] key is

pressed. If there is no heading sensor con-

nection, the display mode is always HU.

SSel by omnipad & press ENT.S

EBL

OFFSET

RINGS

MODE

SHIFT

ZOOM

ECHO

DISP

DATA

ECHO

TRAIL

STRTCH

Change brill

from 3 to max.

OTHER

ARP-10

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

Note: The radar begins operation with last

selected display mode (except course up)

whenever the unit is turned on. Note how-

ever that head up is selected when course

up was the last used mode.

Figure 3-1 Main menu

2. Press the omnipad to select item. For

example, select RINGS. A message ap-

pears at the bottom of the menu window.

3. Press the [ACQ/ENTER] key to select set-

ting. Each time this key is pressed,

the message changes. For the RINGS

menu, the message sequence is as

shown below.

Head up

The picture is oriented so the heading marker

is at the top of the display. This mode is use-

ful for navigation in congested waters.

Course up

Change brill from Off to 1.

Change brill from 1 to 2.

Change brill from 2 to 3.

Change brill from 3 to max.

Change brill from max to Off.

The course up mode shows ship’s heading

by the heading marker, at the top of the dis-

play. To get heading desired, steer vessel in

direction desired, and then show “CU” at the

top left-hand corner of the display.

Figure 3-2 Messages for RINGS menu

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

3-1

Download from Www.Somanuals.com. All Manuals Search And Download.

Note1: This function magnifies not only tar-

gets but also sea clutter and radar interfer-

ence. For this reason be sure the sea clutter

and radar interference are sufficiently sup-

pressed before activating the echo stretch.

North up

North is at the top of the display and the head-

ing marker moves with ship’s heading. This

mode is useful for determining ship’s posi-

tion and as a navigation monitor on a nauti-

cal chart. The picture is stabilized against yaw

of vessel, thereby reducing smear of target

echoes.

Note2: ES2 is not available on short range.

3.4 Echo Trail

True motion

You can show the movement of all radar tar-

gets relative to your vessel in afterglow. This

function is useful for alerting you to possible

collision situations.

True motion displays own ship and moving

objects in their true motion.

3.3 Magnifying Long Range

Echoes (echo stretch)

Starting echo trail

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

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 cir-

cuitry. The echo stretch function magnifies

these small blips in all ranges. Two types of

echo stretch are available: ES1 which

stretches echoes in bearing direction and

ES2 which stretches them in both range and

bearing directions.

2. Select “ECHO TRAIL” by the omnipad.

3. Select “ACTIVATE” by pressing the [ACQ/

ENTER] key.

To turn the echo stretch on or off;

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

Figure 3-4 How the echo trail feature works

2. Select “ES.”

TRAIL, the echo trail time selected (on

“OTHERS MENU”) and elapsed time appear

at the top right-hand corner of the display.

Then, afterglow starts extending from all tar-

gets.

3. Each press of the [ACQ/ENTER] key

changes the echo stretch function status

in the sequence of ES1, ES2 and OFF.

ES1 or ES2 appears at the top right-hand

corner of the display when echo stretch

is on.

Note: Trails are restarted when range or

mode is changed or zoom or offcenter is

turned on.

Bearing

direction

Range

direction

Echo stretch 2

Echo stretch 1

Figure 3-3 Echo stretch

3-2

Download from Www.Somanuals.com. All Manuals Search And Download.

Fixed time trail

3.5 Suppressing Radar

Interference

1. When the elapsed time clock counts up

to the trail time selected, the elapsed time

display freezes.

Radar interference may occur when near an-

other shipborne radar operating in the same

frequency band as your radar. Its on-screen

appearance is many bright dots either scat-

tered at random or in the form of dotted lines

extending from the center to the edge of the

display. Figure 3-5 illustrates interference in

the form of curved spokes. Interference ef-

fects are distinguishable from normal echoes

because they do not appear in the same place

on successive rotations of the scanner.

2. The oldest portions of trails are erased

so only the latest trail, equal in length to

the trail time selected, is shown.

3. Trail continues.

For example, the one minute trail time is se-

lected. When the elapsed time clock counts

up to 60 seconds, the elapsed time display

freezes at “60,” but the latest one minute of

trail are erased and then trail continuous.

Continuous trail

The maximum continuous trail time is 99 min-

utes and 59 seconds. When the elapsed time

clock counts up to that time the elapsed time

display is reset to zero and trail begins again.

Figure 3-5 Radar interference

Cancelling echo trail

Four levels of interference are available, in-

cluding off; IR1, IR2, IR3 and OFF. IR3 pro-

vides the highest level of rejection.

Select “OFF (deactivate)” at “ECHO TRAIL”

on the menu.

1. Press the [MENU] key.

Changing trail attributes

2. Select “OTHERS MENU” and press the

[ACQ/ENTER] key.

Trail gradation and trail time can be selected

on the OTHERS menu.

[ OTHERS ]

Select item by omnipad

and press ENTER key.

Table 3-1 Trail attributes

1 . Panel Dimmer

2 . Mark Brill

3 . HD Mark

Item in

4 . Characters

5 . Trail Tone

6 . Int Reject

Description

OTHERS menu

Single

Off

Short

Off

15S

Multi

Trails can be shown in single

or multiple gradations. Multiple

paints trails getting thinner

with time just like the

7 . Pulselength

8 . Noise Reject

9 . Trail Time

Long

30S

3M 6M

15M 30M

Manu

Cont

10. Tune

Auto

Off

11. Disp Data

12. WPT Mark

13. EBL Ref

Nav

ARP All

afterglow on an analog PPI

radar.

Tone

Trail

Off

Rel

True

14. VRM Unit

15. Watchman

16. STBY Disp

17. Guard Mode

18. Own Position

19. Cursor Posi

20. Alm Sense LV

21. Dead Sector

22. Range

Off

10M 20M

Nav

Single

Multiple

Norm

Econo

Out

L/L

R/B

Low

Off

L/L

Mid

1/ 2 3/4

Hig

Trail time can be set for 15

sec., 30 sec., 1 min., 3 min., 6

min., 15 min., 30 min., or

continuous.

1/8 1/4

1.5

16 14 16

Trail Time

23. Self Test

24. Installation Setup

*Max range

1932M2: 48

1942M2: 64

Figure 3-6 OTHERS menu

3-3

Download from Www.Somanuals.com. All Manuals Search And Download.

3. Select “6. Int Reject.”

Selection of guard zone type

4. Select level desired by operating the

omnipad.

The guard alarm can be set to sound when a

target either enters or exits the guard zone.

You can select which type of guard alarm you

want through the menu.

5. Press the [ACQ/ENTER] key.

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

In alarm

IR1, IR2 or IR3 appears at the bottom right

corner on the display when the interference

rejection circuit is turned on.

The alarm sounds on targets entering the

guard zone. “G (IN)” appears at the top right-

hand corner when the In alarm is selected.

3.6 Selecting Pulsewidth

Out alarm

Pulsewidth is the time in microseconds nec-

essary to transmit a single radar pulse. The

longer the pulsewidth the greater the direc-

tion range capability, however range accu-

racy and range resolution are reduced.

The alarm sounds on targets exiting the guard

zone. “G (OUT)” appears at the top right-hand

corner when the Out alarm is selected.

Pulsewidth can be selected to short or long

on the 1.5 and 3 nautical mile ranges.

Dashed line:

no alarm

1. Press the [MENU] key.

Guard

zone

2. Select “OTHER MENU” and press the

[ACQ/ENTER] key.

IN ALARM

OUT ALARM

3. Select “7. Pulselength.”

Figure 3-7 In and Out alarms

Selecting guard zone type

4. Select Short or Long by pressing the

omnipad.

5. Press the [ACQ/ENTER] key to select.

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

1. Press the [MENU] key, select “OTHERS

MENU,” and then press the [ACQ/EN-

TER] key.

2. Select “17. Guard Mode” and “In” (alarm

on target entering zone) or “Out” (alarm

on target exiting zone) by operating the

omnipad.

3.7 Guard Alarm

The guard alarm allows the operator to set

the desired range and bearing for a guard

zone. When ships, islands, landmasses, etc.

violate the guard zone an audible alarm

sounds and the offending target blinks to call

the operator’s attention.

3. Press the [ACQ/ENTER] key.

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

Setting a guard zone

1. Mentally create the guard zone you want

to set. Figure 3-8 shows an example.

CAUTION

The guard alarm is a useful anti-collision

aid, but does not relieve the operator of the

responsibility to also keep a visual lookout

for possible collision situations. The alarm

should never be used as the sole means

for detecting possible collision situations.

2. Operate the omnipad to set the cursor on

point A (or B). Press the [GUARD] key.

“*G (IN)” or “*G (OUT),” with asterisk blink-

ing, appears at the top right-hand corner

of the display. See Figure 3-8 (2). (The

asterisk indicates the guard zone is par-

tially set.)

3-4

Download from Www.Somanuals.com. All Manuals Search And Download.

3. Operate the omnipad to set the cursor on

point C (or D). See Figure 3-8 (3).

Notes on the guard alarm

¡ The alarm is a useful anti-collision aid, but

does not relieve the operator of the re-

sponsibility to also keep a visual lookout

for possible collision situations.

4. Press the [GUARD] key. The asterisk dis-

appears. See Figure 3-8 (4).

Asterisk blinking

¡ When the radar range is less than one

half of the guard zone range, the guard

zone disappears and “G (IN)” or “G (OUT)”

appears in inverse video. If this happens,

raise range to re-display the guard zone.

Guard zone

* G (IN)

to set

Drag cursor

here.

¡ A target echo does not always mean a

landmass, reef, ships or surface objects

but can imply returns from sea surface or

precipitation. As the level of these returns

varies with environment, the operator

should properly adjust the A/C SEA, A/C

RAIN and GAIN to be sure the alarm sys-

tem does not overlook target echoes.

(1) Mentally create

the guard zone to set.

(2) Drag cursor to

top left corner of

zone and press

[GUARD].

G (IN)

Guard

zone

3.8 Watchman

Drag cursor

here.

The watchman function periodically transmits

the radar for one minute to check for targets

in a guard zone. If it finds change in the zone

from the previous transmission it transmits

the radar continuously. This feature is useful

when you do not need the radar’s function

continuously but want to be alerted to radar

targets in a specific area.

(3) Drag cursor to

(4) Guard zone

completed.

bottom right corner

of zone and press

[GUARD].

Figure 3-8 How to set the guard zone

Silencing the audible alarm

Any radar targets violating the guard zone

will trigger the audible alarm. You can silence

the audible alarm by pressing the [GUARD]

key. When this is done, “G(ACKN)” replaces

“G(IN).” This means the alarm is acknowl-

edged. Press the key again to reactivate the

alarm. You may select minimum echo stregth

which triggers the guard alarm. This can be

done at “20, Alm Sence Lv” on the “OTHER

MENU.”

St-by

1 min

5, 10 or

20 min

1 min

5, 10 or

20 min

Watchman

starts.

Figure 3-9 How watchman works

How watchman works

When the time selected for the watchman rest

period has elapsed, the radar automatically

transmits for one minute to check the condi-

tion inside the guard zone. If there is no

change, the radar goes into stand-by.

(“WATCHMAN” appears during stand-by.) If

there is change, the radar sounds the audible

alarm, cancels the watchman function and

transmits continuously.

Cancelling the guard zone and

guard alarm

Press and hold down the [GUARD] key until

the guard zone disappears.

3-5

Download from Www.Somanuals.com. All Manuals Search And Download.

(If the navigation input includes destination

data, the waypoint marker, shown by a

dashed ring with a line extending from it to

the screen center appears. This marker can

be turned on/off the “OTHER MENU”)

Turning on watchman

1. Create a guard zone (usually 360 de-

grees) with the guard alarm function.

2. Press the [MENU] key.

3. Select “OTHERS MENU.”

4. Press the [ACQ/ENTER] key.

5. Select “15. Watchman.”

To turn navigation data on or off;

1. Press the [MENU] key.

2. Select “DISP DATA.”

6. Operate the omnipad to select watchman

rest period; 5 minutes, 10 minutes or 20

minutes.

3. Press the [ACQ/ENTER] key.

4. Press the [ACQ/ENTER] key to select the

navigation display.

7. Press the [ACQ/ENTER] key.

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

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

“WATCHMAN” appears at the top of the

screen, the radar transmits for one minute to

check for targets inside the guard zone, and

then the CRT shuts off and the radar goes

into stand-by.

AUTO

TRAIL

HDG 234.5¡

25:38

30M

. 125NM

G (OUT)

0625

ZOOM

ES1

Waypoint Marker

Cancelling watchman

Go into the “OTHERS” menu, and set “15.

Watchman” for OFF.

Note 1: Watchman can be used without a

guard zone.

A/C

AUTO

EBL

345.6¡ R

23.0¡ R

Note 2: The alarm sounds just before the ra-

dar starts or stops transmitting.

VRM

0.048NM

0.100NM

13.5¡ R

0.142NM

OWN SHIP

34¡ 56. 12N

135¡ 34. 56E

SPD 35.0KT

CURSOR

WAYPOINT

0.09 NM

50.0¡M

TTG 00:20

Navigation

Data

34¡ 29. 98N

136¡ 35. 77E

TTG 01:00

3.9 Displaying Navigation Data

Figure 3-10 Typical navigation data display

Navigation data can be displayed at the

screen bottom if this radar receives naviga-

tion input in IEC 61162 format. Navigation

data includes

¡ Position in latitude and longitude or Lo-

ran-C time differences

¡ Range, bearing and time-to-go to both

waypoint selected on the navigator and

the cursor

¡ Speed.

3-6

Download from Www.Somanuals.com. All Manuals Search And Download.

3.10 OTHER MENU Description

The table below summarizes the OTHER menu.

Table 3-2 OTHER MENU Description

Item

1. Panel Dimmer

2. Mark Brill

3. HD Mark

Description

Selects level of panel backlight.

Selects brilliance of VRM, EBL, cursor, guard zone and WP marker.

Selects brilliance of heading marker.

Selects brilliance of characters.

4. Characters*

5. Trail Tone

6. Int Reject

7. Pulselength

8. Noise Reject

9. Trail Time

10. Tune

Selects brilliance of echo trails.

Selects level of interference rejection.

Selects pulselength for 1.5 and 3 mile ranges.

Selects “On” to reject noise.

Selects the echo trail time.

Selects automatic or manual tuning.

To tune manually;

1. Select “Manu” by the omnipad.

2. Press the [ENTER] key to enable manual tuning.

3. While pressing and holding down the [GAIN] control, operate the

omnipad to obtain best tuning condition, observing the tuning indicator

bar (1.0~11.9V).

4. Press the [ENTER] key.

“MANUAL” appears at the top right-hand corner when manual tuning is in

effect.

11. Disp Data

Select the down sourse to display.

Selects data to display; Nav, ARP, or All (both Nav and ARP).

12. WPT Mark

13. EBL Ref

Selects “On” to display the waypoint marker.

Selects EBL reference for relative or true.

14. VRM Unit

15. Watchman

16. STBY Disp

Selects distance unit of VRM and cursor for nm, km or sm.

Turns watchman on (set rest period) or off.

Select the display to use at stand-by; display “STBY” or navigation data, or

go into the economy mode.

17. Guard Mode

Select condition which triggers guard alarm; targets entering guard zone

(In), target exiting guard zone (out).

18. Own Position

19. Cursor Posi

20. Alm Sense LV

21. Dead Sector

22. Range

Select position display format; L/L on Loarn TD.

Display the cursor data in range/bearing or lat/long.

Select minimam echo strength which triggers guard alarm.

Select “On” to display the dead sector.

Select ranges to use.

23. Self Test

Test keys, ROM and RAM; checks antenna rotation speed, and displays

program no.

24. Installation Setup

Displays to the installation setup menu.

*Note: Level 1 and 2 are same brilliance while the menu is displayed. The brilliance changes

after the menu is erased.

3-7

Download from Www.Somanuals.com. All Manuals Search And Download.

3.11 Function Controls

3.12 Suppressing Noise

The function controls (F1 and F2) work like

the auto-dialing feature of a telephone, auto-

matically executing the function assigned to

them. The function can be turned off by press-

ing appropriate function control again.

Electrical noise can be suppressed by turn-

ing on “8. NOISE REJ” on the OTHERS

menu.

3.13 Adjusting Brilliance of

Markers

Default settings

F1: Shift (brief press) or Zoom (long press)

F2: Ring brilliance

“2. Mark Brill” on the OTHER menu adjusts

the brilliance of markers other than the head-

ing marker.

How to register menu items

1. Press the [MENU] key.

3.14 Outputting Target Position

2. Press [A/C SEA] (F1) or [A/C RAIN] (F2)

to open the function menu.

Radar target position data can be output to a

navaid in IEC 61162 format. Select the radar

target with the cursor, and then press and

hold down the [TLL] key to output the data.

This function requires position data and head-

ing signal.

[ SETTING FOR F1 KNOB ]

SSel by omnipad & press ENT.S

EBL

OFFSET

SHIFT/

ZOOM

SHIFT

ZOOM

DISP

DATA

ECHO

TRAIL

RINGS

MODE

INT

REJECT

PULSE

LENGTH

NOISE

REJ

ECHO

STRTCH

3.15 Dead Sector

TRAIL

TONE

TUNE

A/M

TRAIL

ON/OFF

TRAIL

TIME

When the scanner is installed at a close dis-

tance in front of the wheelhouse the radar

should be set not to transmit within that area,

to prevent microwave hazard. Ask your

FURUNO representative ordealer to provide

this feature.

ALARM

LEVEL

GUARD

IN/OUT

DEAD

SECTOR

WATCH

MAN

PANEL

DIMMER

MARK

BRILL

CHARA

CTERS

OTHER

VRM

UNIT

NAV

TALKER

EBL

REF

WPT

MARK

VECTOR

LENGTH

OWN

POSITN

VECTOR

REF

CUSOR

POSITN

COLLI

SION

HIS

TORY

FNCTN

AUTO

ACQ

Figure 3-11 Function menu

3. Select function desired.

4. Press the [ACQ/ENTER] key.

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

3-8

Download from Www.Somanuals.com. All Manuals Search And Download.

4. FALSE ECHOES

Occasionally false echoes appear on the

screen at positions where there is no target.

In some cases the effects can be reduced or

eliminated. The operator should familiarize

himself or herself with the appearance and

effects of these false echoes, so as not to

confuse them with echoes from legitimate

contacts.

4.2 Side-lobe Echoes

Every time the scanner rotates, some radia-

tion escapes on each side of the beam—

called “side-lobes.” If a target exists where it

can be detected by the side-lobes as well as

the main-lobe, the side-lobe echoes may be

represented on both sides of the true echo

at the same range, as shown in Figure 4-2.

Side-lobes show usually only at short ranges

and from strong targets. They can be reduced

through careful reduction of the sensitivity or

proper adjustment of the A/C SEA.

4.1 Multiple Echoes

Multiple echoes occur when a short range,

strong echo is received from a ship, bridge,

or breakwater. Asecond, a third or more ech-

oes may be observed on the display at

double, triple or other multiples of the actual

range of the target as shown in Figure 4-1.

Multiple reflection echoes can be reduced

and often removed by decreasing the sensi-

tivity or properly adjusting the A/C SEA.

True echo

Main-lobe

Side-lobe

Sprious

target

Antenna

True

echo

Figure 4-2 Side-lobe echoes

Own ship

Multiple

echo

Figure 4-1 Multiple echoes

4-1

Download from Www.Somanuals.com. All Manuals Search And Download.

4.3 Indirect Echoes

4.4 Blind and Shadow Sectors

Indirect echoes may be returned from either

a passing ship or returned from a reflecting

surface on your own ship, for example, a

stack. In both cases, the echo will return from

a legitimate contact to the scanner by the

same indirect path. The echo will appear on

the same bearing of the reflected surface, but

at the same range as the direct echo. Figure

4-3 illustrates the effect of an indirect echo.

Indirect echoes may be recognized as fol-

lows:

Funnels, stacks, masts, or derricks in the path

of antenna may reduce the intensity of the

radar beam. If the angle subtended at the

antenna is more than a few degrees a blind

sector may be produced. Within the blind

sector small targets at close range may not

be detected while larger targets at much

greater ranges may be detected. See Figure

4-4.

• they usually occur in a shadow sector

• they appear on the bearing of the obstruc-

tion but at the range of the legitimate con-

tact

• when plotted, their movements are usu-

ally abnormal, and

• their shapes may indicate they are not di-

rect echoes.

Heading

marker

Direct

path

Target

Figure 4-4 Blind and shadow sectors

Indirect

path

Obstruction

(mast, funnel.

etc.)

Scanner

Target

True

echo

Indirect

path

Indirect

Direct

path

echo

Heading

marker

Own

ship

True

echo

Bridge

Indirect

echo

Indirect

echo

Figure 4-3 Indirect echoes

4-2

Download from Www.Somanuals.com. All Manuals Search And Download.

Showing SART marks on the radar

display

4.5 SART (Search and Rescue

Transponder)

To show the SART marks only on the radar

display, detune the radar receiver manualy.

This erases or weakens all normal radar ech-

oes, but, the SART marks are not erased be-

cause the SART response signal scans over

all frequencies in the 9 GHz band. When the

radar approaches the SART in operation, the

SART marks will enlarge to large arcs, blur-

ring a large part of the screen. Reduce the

sensitivity and adjust the sea clutter control

of the radar.

A Search and Rescue Transponder (SART)

may be triggered by any X-Band (3 cm) ra-

dar within a range of approximately 8 n.miles.

Each radar pulse received causes it to trans-

mit 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 rela-

tively 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 inter-

rogating radar and be within the pass band

of the radar receiver. If the SART is within

range, the frequency match during each of

the 12 slow sweeps will produce a response

on the radar display, thus a line of 12 dots

equally spaced by about 0.64 nautical miles

will be shown.

Summary to detect SART response

1. Use 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.

3. Turn off the Interference Rejector.

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

smaler than the original dots.

General remarks on receiving SART

Radar range scale

When looking for a SART it is preferable to

use either the 6 or 12 nautical mile range

scale. This is because the total displayed

length of the SART response of 12 (or 24)

dots may extend approximately 9.5 nautical

miles beyond the position of the SART and it

is necessary to see a number of response

dots to distinguish the SART from other re-

sponses.

Screen A: When SART

is distant

Screen B: When SART

is close

Lines of 12 dots

are displayed in

concentric arcs.

Radar antenna

beamwidth

Echo of SART

24 NM

Echo of

SART

1.5 NM

Position of

SART

SART range errors

Own ship's

position

When responses from only the 12 low fre-

quency 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 mush as 0.64 nm beyond the true po-

sition of the SART. When the range closes

so that the fast sweep responses are seen

also, the first of these will be no more than

150 meters beyond the true position.

Own ship's

position

Position of

SART

SART mark

length

Radar receiver

bandwidth

9500 MHz

9200 MHz

Sweep time

7.5

Low speed sweep signal

High speed sweep signal

Sweep start

Figure 4-5 SART display

4-3

Download from Www.Somanuals.com. All Manuals Search And Download.

5. MAINTENANCE & TROUBLESHOOTING

This chapter tells you how to keep your ra-

dar in good working order. Before reviewing

5.1 Preventive Maintenance

this chapter please read the safety informa-

tion which follows.

Regular maintenance is important for good

performance. Always keep the equipment as

free as possible from dirt, dust, and water

splashes. Make sure all screws securing the

components are properly tightened.

DANGER

Turn off the power before

performing any maintenance or

troubleshooting procedure.

A maintenance program should be estab-

lished and should at least include the items

listed in Table 5-1.

Hazardous voltages can shock, burn or cause death.

Only qualified personnel totally famillier with electrical

circuits should work inside the units.

5.2 Replacing the Fuse

RF RADIATION HAZARD

The fuse in the power cable protects the

equipment against reverse polarity of ship's

mains, overcurrent, and equipment fault. If

the fuse blows, find the cause before replac-

ing it. Never use an incorrect fuse - serious

damage to the equipment may result and void

the warranty.

The radar scanner emits high frequency

radio radiation which can be harmful,

particularly to your eyes.

Never look directly into the scanner from a distance of

less than two feet when the radar is in operation as

you could injure the cornea of your eyes. Always

make sure the radar is set to stand-by or is turned off

before starting work on the scanner unit.

12V: 10A fuse

24/32V: 5A fuse

CAUTION

Use the proper fuse.

Use of a wrong fuse can result in

equipment damage.

Table 5-1 Recommended maintenance program

Period

Item

Check point

Remarks

3 to 6

months

Exposed

nuts and

bolts on

Check for corroded or loosened

nuts and bolts. If necessary,

clean and repaint them thickly.

Sealing compound may be used

instead of paint. Apply a small

amount of grease between nuts

and bolts for easy removal in

future.

scanner unit Replace them if heavily

corroded.

Scanner

radiator

Check for dirt and cracks on

radiator surface. Thick dirt should (acetone) for cleaning. If you

be wiped off with soft cloth

dampened with fresh water. If a

crack is found, apply a slight

amount of sealing compound or

adhesive as a temporary

Do not use plastic solvent

need to remove ice from scanner

unit, use a wooden hammer or

plastic head hammer. Crack on

the unit may cause water

ingress, causing serious

damages to internal circuits.

remedy, then call for repair.

6 months Display unit Check for tight connection and

to 1 year connectors corrosion.

If corroded, contact your dealer

for replacement.

5-1

Download from Www.Somanuals.com. All Manuals Search And Download.

5.3 Troubleshooting

Table 5-2 contains simple troubleshooting

procedures which you can follow to try to re-

store normal operation. If you cannot restore

normal operation, do not attempt to check

inside any unit of the radar system. Any re-

pair work is best left to a qualified technician.

Table 5-2 Troubleshooting table

But... Then...

the control panel does • try adjusting the control panel back-

If...

you pressed the

[POWER] key to turn not light

on the radar

lighting on the OTHERS menu.

• battery may have discharged.

• check fuse in power cable.

nothing appears on

• try adjusting the brilliance.

the display or display

contrast is poor

characters are

distorted

• request service.

the radar has

warmed up and you rotate

pressed the

[STBY TX] key to

transmit

the scanner does not

• the problem may be in scanner unit.

Request service.

characters and

indications are

abnormal

• have a qualified technician check the

set.

you have adjusted

the gain with A/C

RAIN and A/C SEA

off

neither noise nor

targets appear

(indications and

markers do)

• check signal cable for damage.

neither indications nor • check signal cable for damage.

markers appear (noise

and targets do)

the sweep (radial line

sweeping around the

display) is not

• the problem may be in the scanner

unit. Request service.

synchronized with

scanner rotation

there is no change in • request service.

sensitivity

a key is pressed

nothing happens

• key may be faulty. Request service.

5-2

Download from Www.Somanuals.com. All Manuals Search And Download.

6. Press the [ACQ/ENTER] key to check the

display circuit. The following pattern

should appear.

5.4 Self Test

The self test facility checks the keyboard,

ROM and RAM for proper operation.

1. Press the [MENU] key.

2. Select “OTHER MENU”.

3. Select “23. Self Test” and press the [ACQ/

ENTER] key. The following display ap-

pears.

[ Self Test ]

Key test: Press each key and

check on-screen indication

lights.

Figure 5-2 Test pattern

ARP-10 TEST

ROM

RAM

OK 18590271xx

7. To return to the Self Test menu, press the

[MENU] key.

SPEED OK NAV 0.0KT

COURSE OK

TRIGGER NG

167.6°

VIDEO

8. To escape from the self test, press the

[MENU] key.

MIN-HIT

0003

0854

0000

SCAN-TIME

MAN-ACQ

AUTO-ACQ

FE-DATA1

FE-DATA2

0000

5.5 Life Expectancy of

Magnetron

Program No.: 0359146-1XX

ROM

RAM

: OK

Hours in use: 000006.9H

Tx hours : 000001.1H

The following table shows the life expectancy

of the magnetrons.

Version no.

11 and after is available

with MARK-2 series.

Table 5-3 Life expectancy of magnetrons

Model

Type

Code no.

Life expectancy

Figure 5-1 Self test screen

1932 M2 E3571

000-137-527 2,000-3,000 hours

(Including stand-by)

1942 M2 MG5389 000-135-146

4. The ROM and RAM are automatically

checked. If NG (No Good) appears to the

right of ROM or RAM indication, contact

your dealer for advice. ARP-10 TEST re-

sults appear only when optional ARP-10

board is mounted.

5. To check the keyboard, press any key ex-

cept [ACQ/ENTER] and [POWER] keys.

The pressed key's on-screen location

lights in black while the key is pressed, if

the key is operating properly.

5-3

Download from Www.Somanuals.com. All Manuals Search And Download.

6. OPERATION OF ARP-10 (OPTION)

CAUTION

The plotting accuracy and response of

this auto plotter meets IMO standards.

Tracking accuracy is affected by the

following:

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

• 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.

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.

Display accuracy is affected by the

following:

• Echo intensity

• Radar transmission pulsewidth

• Radar bearing error

• 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.

• Gyrocompass error

• Course change (own ship or target)

This ARPA board is not available with

42 rpm radar.

NOTICE

Heading data required for plotting function.

6-1

Download from Www.Somanuals.com. All Manuals Search And Download.

MENU: opens/closes the main menu.

6.1 General

SELECT/CANCEL:

The Auto Plotter ARP-10 is an optional cir-

cuit board which is accommodated in the dis-

play unit of this radar (24 rpm only) radars. It

requires heading data to function.

A long press terminates plotting of the target

selected with the cursor, and a brief press

displays the data of the target selected with

the cursor.

TheAuto Plotter permits manual or automatic

acquisition and automatic tracking of up to

10 radar targets. An internal microprocessor

calculates target data such as speed and

course and displays the results in alphanu-

meric data and by vector. To ensure the reli-

ability of the displayed target data, the radar

must be properly adjusted for minimum sea

returns and noise.

ACQ/ENTER: Acquires the target selected

with the cursor.

6.2 ARP-10 MENU Operation

The ARP-10 MENU contains the following

items.

Display: Turns on/off the plot symbols, past

positions and target data.

Principal specifications

Acquisition and tracking

All Cancel: Cancels the tracking of all

targets.

• Acquisition of up to 10 targets between

Vector Ref: Selects relative or true vectors.

To select your choice, open the ARP-10

menu. Select “3 Vector Ref” to Relative or

Ture, and then, press the [ACQ/ENTER] key.

0.2 and 16 nm.

• Automatic tracking of up to 10 acquired

targets between 0.1 and 16 nm.

Vectors

Vector Length: Selects vector time.

History: Selects past position plot interval.

Vector length: 30 s, 1, 3, 6, 15, 30 min.

CPA Set: Selects CPA alarm limit. When a

target is predicted to come within this limit,

an audible alarm sounds and at the same time

the corresponding target symbol changes to

a blinking triangle.

Orientation:

True velocity or relative ve-

locity

Past positions: 5 past positions at intervals

of 15, 30 s, 1, 2, 3, 6 min.

Alarm:

Visual and audible alarms

against targets violating CPA/

TCPA limits, Visual alarm

against lost targets

Note: If the preset CPA limit is set at OFF, a

target which is on collision course will not

produce an alarm.

Target discrimination: A target measuring

about 800 m or more in the radial or circum-

ferential direction is regarded as a landmass

and not acquired or tracked. Echoes smaller

than about 800 m are regarded as true tar-

gets.

TCPA Set: Selects TCPA alarm limit.

AutoACQ: Turns on/offAutoAcquisitionArea.

Activating the auto plotter

To activate the Auto Plotter, follow the steps

shown below.

Keys used for auto plotter

1. Adjust the GAIN, A/C SEA and A/C RAIN

controls for proper radar picture.

The ARP-10 uses the following touchpad

keys. Given below is a brief description of

these keys.

2. Press the [MENU] key to open the main

menu.

6-2

Download from Www.Somanuals.com. All Manuals Search And Download.

3. Select “ARP-10 MENU.”

5. Select the menu item “1. Display.”

6. Select “On.”

4. Press the [ACQ/ENTER] key to display

the ARP menu.

7. Press the [ACQ/ENTER] key.

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

[ ARP MENU ]

Select item by omnipad

and press ENTER key.

Deactivating the auto plotter

1. Display

Off

2 . All Cancel

3 . Vector Ref

4 . Vector Length

To deactivate the Auto Plotter;

1. Open the “ARP-10 MENU.”

2. Select the “1. Display.”

Rel

True

30S IM

3M 6M 15M 30M

Off 15S 30S 1M

2M 3M 6M

5 . History

6 . CPA Set

7 . TCPA Set

8 . Auto ACQ

Off 0.5 1nm 2nm

3nm 5 nm 6nm

30S 1M 2M 3M

4M 5M 6M 12M

5. Select “Off.”

Off

6. Press the [ACQ/ENTER] key.

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

Figure 6-1 ARP Menu

Target under auto tracking but not

selected for cursor data reading

AUTO

TRAIL

HDG 234.5°

25:38

30M

2 ^NM

G (OUT)

ZOOM

ES1

AUTO TARGET

FULL

Target Full

Mark

Target selected

for data reading

Auto

Acquisition

Area

Lost Target

Threatening

target

A/C

AUTO

EBL

VRM

0.048NM

0.100NM

345.6°R

13.5°R

0.142NM

23.0°R

COURSE 287.8°T

BEARING 42.5°T

Auto Plotter

Data Area

TRUE VECTOR

15 MIN

SPEED 12.5 KT

RANGE 5.36 NM

TCPA

12:35

CPA

2 NM

Figure 6-2 ARPA display

6-3

Download from Www.Somanuals.com. All Manuals Search And Download.

Note 3: When the auto acquisition mode

(Auto ACQ) is on, up to five targets can be

acquired. For details, see next section titled

Automatic Acquisition.

6.3 Acquiring Targets

Manual acquisition

Follow the steps below to manually acquire

a target. Up to 10 targets can be manually

acquired.

CAUTION

When a tracked target nears another

tracked target, the targets may be

1. Place the cursor (+) on a target of inter-

est by operating the omnipad.

"swapped." When two targets come close

to each other, one of the two can become

a "lost target." Should this happen,

reacquisition of the "lost target" is required

after the two targets have separated.

2. Press the [ACQ/ENTER] key.

The plot symbol changes its shape accord-

ing to the status as below. A vector appears

in about one minute after acquisition indicat-

ing the target's motion trend. If the target is

consistently detected for three minutes, the

plot symbol changes to a solid mark. If ac-

quisition fails, the target symbol blinks and

disappears shortly thereafter.

Automatic acquisition

The Auto Plotter ARP-10 can acquire up to

five targets automatically by setting the Auto

Acquisition area predefined in the system. If

AutoACQ is selected after more than five tar-

gets have been manually acquired, only the

remaining capacity of targets can be auto-

matically acquired. (For example; when

seven targets are acquired manually, and

then the Auto ACQ is switched on only three

targets can be acquired automatically.) When

five targets have been automatically ac-

quired, "AUTO TARGET FULL" message

appears at top left corner on the display.

SQUARE (dotted)

Immediately after acquisition - Plot symbol

shown in broken lines.

SQUARE (dotted with a vector)

One minute after acquisition - Vector still un-

reliable.

CIRCLE (Solid with a vector)

3 minutes after acquisition - Plot symbol

changes to a solid circle indicating the stable

tracking condition.

Setting auto acquisition area

Auto acquisition area is predefined between

2.0 and 2.5 nm in range and 45° on either

side of the heading marker in bearing. If a

target come into this area, it is acquired au-

tomatically.

LARGE CIRCLE

The plot symbol of a target under tracking

becomes twice as large as the normal sym-

bol when the target is selected for data read-

ing.

Note 1: The target to be acquired should be

within 0.2 to 16 nm from own ship and not

obscured by sea or rain clutter for success-

ful acquisition.

Figure 6-3 Auto acquisition area

Note 2: When you want to acquire 11th tar-

get, cancel tracking of the one of less impor-

tant targets.

6-4

Download from Www.Somanuals.com. All Manuals Search And Download.

4. Press the [ACQ/ENTER] key.

Follow the steps shown below to activate the

auto acquisition area.

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

1. Open the “ARP-10 MENU.”

2. Select “8. Auto ACQ.”

CAUTION

At the speed under 5 kts the target data is

displayed with a delay because of

filtration.

3. Select “On.”

4. Press the [ACQ/ENTER] key.

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

Place the cursor on a wanted target and press

the [SELECT/CANCEL] key. Data on the se-

lected target is displayed at the bottom of the

screen. The symbol of the selected target

gets twice as large as the normal circle. The

data includes the following:

Terminating Tracking of Targets

When the Auto Plotter has acquired 10 tar-

gets, no more acquisition occurs unless tar-

gets are lost. Should this happen, cancel

tracking of individual targets or all targets by

the procedure described below.

RNG/BRG (Range/Bearing): Range and

bearing from own ship to the last-plotted or

selected target position with suffix “T” (True)

or “M” (Magnetic). For true bearings suffix “T”

is used in case of gyrocompass input and suf-

fix “M” is used in case of magnetic compass

input.

Individual targets

Place the cursor (+) on a target which you do

not want to be tracked any longer by operat-

ing the omnipad and press and hold down

the [SELECT/CANCEL] key.

COURSE/SPEED (Course/Speed): Course

and speed are displayed for the last-plotted

or selected target with suffix “T” (True) or “M”

(Magnetic). For true bearings suffix “T” is used

in case of gyrocompass input and suffix “M”

is used in case of magnetic compass input.

All targets

All targets can be canceled from "ARP-10

MENU" at a time.

CPA (Closest Point of Approach): is the

closest range a target will approach to own

ship. Do not mix it with the operator preset

CPA alarm limit.

1. Open the “ARP-10 MENU.”

2. Select “2. All Cancel.”

3. Press the [ACQ/ENTER] key.

TCPA: The time to CPA measured with

present speeds of own ship and the targets.

Both CPA and TCPA are automatically cal-

culated. When a target ship has passed clear

of own ship, the CPA is displayed and the

TCPA appears as “**.*”. TCPA is counted up

to 99.9 min. and beyond this it is indicated

as TCPA>99.9 min.

6.4 Displaying Target Data

The Auto Plotter calculates motion trends

(range, bearing, course, speed, CPA and

TCPA) of all targets under tracking at theARP

Data area.

To turn ARP data on;

1. Press the [MENU] key.

2. Select “DISP DATA.”

3. Press the [ACQ/ENTER] key to select the

message for “ARP” or “NAV” or “ARP.”

6-5

Download from Www.Somanuals.com. All Manuals Search And Download.

6.5 Mode and Length of

Vectors

6.7 Operational Warnings

There are two main situations which cause

the ARP-10 to trigger visual and audible

alarms:

True or relative vector

(vector mode)

• CPA/TCPA alarm

• Lost target alarm

Target vectors are displayed relative to own

ships reading (Relative) or with reference to

North (True). Own ship does not have a vec-

tor in relative mode.

CPA/TCPA alarm

Vector length

CAUTION

The CPA/TCPA alarm feature should

never be relied upon as a sole means for

detecting the risk of collision.

From the ARP-10 MENU, Vector Length can

be set to 30 seconds, 1, 3, 6, 15 or 30 min-

utes and the selected vector time is indicated

on the screen.

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.

The vector tip shows an estimated position

of the target after the selected vector time

elapses. It can be valuable to extend the vec-

tor length to evaluate the risk of collision with

any target.

Visual and audible alarm are generated when

the predicted CPA and TCPA of any target

become less than their preset limits. The au-

dible alarm continues for 10 seconds.

6.6 Past Position Display

The ARP-10 continuously monitors the pre-

dicted range at the Closest Point ofApproach

(CPA) and predicted time to CPA (TCPA) of

each tracked target to own ship.

TheAuto Plotter displays equally time-spaced

dots (maximum five dots) marking the past

positions of any targets being tracked.

If a target changes its speed, the spacing will

be uneven. If it changes course, its plotted

course will not be a straight line in TM mode.

When the predicted CPA of any target be-

comes smaller than a preset CPAalarm range

and its predicted TCPA less than a preset

TCPA alarm limit, the ARP-10 releases an

audible alarm. In addition, the target plot sym-

bol changes to a triangle and flashes together

with its vector. The flashing of the triangle plot

symbol and vector remain on the screen un-

til the dangerous situation is no longer present

or you intentionally terminate tracking of the

target by using the [SELECT/CANCEL] key.

To turn past position display an or off do the

following:

1. Open the ARP-10 menu.

2. Select History.

3. Select plot enterval among 15, 30 sec-

onds, 1, 2, 3 or 6 minutes. Select OFF to

erose the past position display.

Provided that this feature is used correctly, it

will help prevent the risk of collision by alert-

ing you to threatening targets. It is important

that GAIN, A/C SEA, A/C RAIN and other

radar controls are properly adjusted and the

Auto Plotter is set up so that it can track tar-

gets effectively.

4. Press the [ACQ/ENTER] key.

5. Press the [MENU] key.

6-6

Download from Www.Somanuals.com. All Manuals Search And Download.

CPA/TCPAalarm ranges must be set up prop-

erly taking into consideration the size, ton-

nage, speed, turning performance and other

characteristics of own ship.

Follow the steps shown below to set the CPA/

TCPA alarm ranges:

1. Open the “ARP-10 MENU.”

2. On the “CPA Set” line, select a CPA limit

desired. (Off, 0.5, 1, 2, 3, 5, 6 nm)

3. Press the [ACQ/ENTER] key.

4. On the “TCPA Set” line, select a TCPA

limit desired. (30s, 1, 2, 3, 4, 5, 6, 12M)

5. Press the [ACQ/ENTER] key.

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

Lost target alarm

When the system detects a loss of a tracked

target, the target symbol becomes a flashing

diamond.

6-7

Download from Www.Somanuals.com. All Manuals Search And Download.

SPECIFICATIONS OF MARINE RADAR

MODEL 1932/1942 MARK-2

1. GENERAL

(1) Indication System

PPI Daylight display, raster scan, 8 tones in monochrome

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

Range (nautical miles)

1.5

PL PRR

0.125 0.25 0.5 0.75

12 16 24 36 48 64

SP 2100 Hz

MP 1200 Hz

LP 600 Hz^*

0.08 µs

0.3 µs

0.8 µs

*550 Hz on 48 nm range or more

Maximum Range;

MODEL 1932 M2: 48 nm, MODEL 1942 M2: 64 nm

(3) Range Resolution

(4) Bearing Discrimination

(5) Minimum Range

20 m

1.9º

25 m (0.25 NM range)

(6) Bearing Accuracy

(7) Bearing Resolution

(8) Range Ring Accuracy

Within 1º

4º

0.9 % of range or 8 m, whichever is the greater

2. SCANNER UNIT

(1) Radiator

Slotted waveguide array

(2) Polarization

Horizontal

(3) Antenna Rotation Speed

(4) Radiator Length

(5) Horizontal Beamwidth

(6) Vertical Beamwidth

(7) Sidelobe Attenuation

24 rpm or 48 rpm nominal

M1932M2: 100 cm (XN10A), M1942M2: 120 cm (XN12A)

M1932M2: 2.4°, M1942M2: 1.9°

M1932M2: 27°, M1942M2: 22°

Within ±20° of main-lobe: less than -24 dB

Outside ±20° of main-lobe: less than -30 dB

3. TRANSCEIVER MODULE

(1) Frequency

9410 MHz ±30MHz (X band)

P0N

(2) Modulation

(3) Peak Output Power

(4) Modulator

M1932M2: 4 kW nominal, M1942M2: 6 kW nominal

FET Switching Method

60 MHz

(5) Intermediate Frequency

(6) Tuning

Automatic or manual

(7) Receiver Front End

MIC (Microwave IC)

SP - 1

Download from Www.Somanuals.com. All Manuals Search And Download.

(8) Bandwidth

(9) Duplexer

Tx pulselength 0.08 ms and 0.3 ms: 25 MHz

Tx pulselength 0.8 ms: 3 MHz

Circulator with diode limiter

4. DISPLAY UNIT

(1) Indication System

(2) Picture Tube

PPI Daylight display, raster scan, 8 tones in monochrome

10 inch rectangular monochrome CRT

effective display area more than 150 mm

(3) Range, Range Interval, Number of Rings

Range (NM)

0.125 0.25 0.5 0.75 1 1.5 2 3

6 8 12 16 24 36 48 64

Ring Interval (NM) 0.0625 0.125 0.125 0.25 0.25 0.5 0.5 1

2 2

3 4

4 6 12 12 16

4 4 4 4

Number of Rings

Maximum Range;

(4) Markers

4 3

MODEL 1932 M2: 48 nm, MODEL 1942 M2: 64 nm

Heading Line, Bearing Scale, Range Rings,

Variable Range Marker (VRM1, VRM2),

Electronic Bearing Line (EBL1, EBL2),

Tuning Bar, Cursor, Parallel Cursor,

Alarm Zone, Waypoint Mark (navigation input required),

North Mark (heading sensor input required)

Range, Range Ring Interval, Pulselength (SP, MP, LP),

Display Mode (HU,CU,NU,TM),

(5) Alphanumeric Indications

Interference Rejection (IR1,IR2,IR3),

VRM (1, 2), EBL (1, 2), Automatic A/C SEA (A/C AUTO),

Stand-by (ST-BY), Radar Alarm (G(IN), G(OUT), G(ACKN)),

Echo Stretch (ES1, ES2), Cursor Range, Bearing or L/L Position,

Echo Tailing (TRAIL), Trailing Time, Trailing Elapsed Time,

Navigation Data (navigation input required),

Heading (HDC, heading sensor input required)

NMEA0183 (Ver.1.5/2.0), current loop

(6) Input Data

Own ship’s position:

Speed:

GGA>RMC>RMA>GLL (accept GLL in NMEA Version 1.5 only)

RMC>RMA>VTG>VHW

Heading (True):

Heading (Magnetic):

Course (True):

Course (Magnetic):

HDT>HDG^*1>HDM^*1>VHW>VHW^*1

HDM>HDG^*1>HDT^*1>VHW>VHW^*1

RMC>RMA>VTG

VTG>RMC>RMA

Waypoint (Range, Bearing): RMB>BWC>BWR

Loran time difference:

Water depth:

RMA>GLC>GTD

DPT>DBT>DBK>DBS

SP - 2

Download from Www.Somanuals.com. All Manuals Search And Download.

Water temperature:

Time:

MTW>MDA

ZDA

Cross track error:

RMB>XTE>APB

*1: calculate by magnetic drift.

NMEA0183 (Version1.5/2.0), RS-422

TLL (target data) and RSD

(7) Output Data

5. ENVIRONMENTAL CONDITION

(1) Ambient Temperature

Scanner Unit: -25°C to +70°C

Display Unit: -15°C to +55°C

95 % or less at +40°C

Scanner Unit: IPX6

(2) Relative Humidity

(3) Waterproofing

Display Unit: IPX4

6. POWER SUPPLY & POWER CONSUMPTION

(1) Power Supply

12/24/32 VDC (10.8 to 41.6 VDC)

(2) Voltage and Current

24rpm: 12 VDC/7.5A, 24VDC/3.8A, 32VDC/2.8A

48rpm: 12 VDC/8.8A, 24VDC/4.4A, 32VDC/3.3A

24rpm: 70 W to 90 W (100 kt)

(3) Power Consumption

48rpm: 85 W to 105 W (70 kt)

7. DIMENSIONS AND MASS

See the Outline Drawings

8. COATING COLOR

(1) Display Unit

Panel: N3.0

Chassis: 2.5GY5/1.5

N9.5

(2) Scanner Unit

9. COMPASS SAFE DISTANCE

(1) M1932M2

Display Unit

Scanner Unit

(2) M1942M2

Display Unit

Standard: 1.1 m

Steering: 0.8 m

Standard: 1.0 m

Standard: 0.75 m

Standard: 1.1 m

Steering: 0.6 m

Steering: 0.8 m

Scanner Unit

SP - 3

Download from Www.Somanuals.com. All Manuals Search And Download.

Index

Acquisition ............................................... 6-4

A/C AUTO key ......................................... 2-4

ACQ/ENTER key..................................... 6-2

A/C RAIN control.................................... 2-4

A/C SEA control .................................... 2-3

Auto plotter.............................................. 6-2

Navigation data .............................. 2-2, 3-6

Noise ....................................................... 3-8

North marker ........................................... 2-5

North up .................................................. 3-2

OTHERS menu ..................................... 3-7

Offcenter ................................................. 2-7

Offset EBL ............................................... 2-6

Bearing measurement ............................. 2-6

Blind sectors............................................ 4-4

Brilliance........................................... 2-3, 3-8

BRILL key................................................ 2-3

POWER key ............................................ 2-2

Presentation mode .................................. 3-1

Power on/off ............................................ 2-2

Program No. ............................................ 5-3

Pulsewidth ........................................ 2-3, 3-4

Pulselength ............................................. 2-3

Course Up ............................................... 3-1

CPA/TCPA alarm ..................................... 6-6

Dead sector ............................................. 3-8

Range key ............................................... 2-3

Range measurement............................... 2-5

Range rings ............................................. 2-5

EBL ........................................................ 2-6

Echo stretch ............................................ 3-2

Echo trail ............................................... 3-2

Economy mode ....................................... 2-2

SART....................................................... 4-2

SELECT/CHANCEL key ......................... 6-2

Self Test (keyboard, RAM, ROM) ............ 5-3

Sensitivity ................................................ 2-3

Shadow Sectors ...................................... 4-2

Side-lobe Echoes .................................. 4-1

Stand-by .................................................. 2-2

ST BY/TX key.......................................... 2-2

System configuration................................. vii

Function controls (F1, F2) ...................... 3-8

Fuse ........................................................ 5-1

Gain control ............................................. 2-3

Guard alarm .......................................... 3-4

Guard alarm sensitivity............................ 3-5

Guard key......................................... 3-4, 3-5

Guard zone ............................................. 3-4

TLL key ................................................... 3-8

Trail tone ................................................. 3-3

Trail time ................................................. 3-3

Transmitting ............................................ 2-2

Troubleshooting .................................... 5-3

Head up................................................... 3-1

Heading marker....................................... 2-5

Vector length ........................................... 6-6

Vector mode ............................................ 6-6

VRM ........................................................ 2-5

Indirect echoes ........................................ 4-1

Interference ........................................... 3-3

Lost target alarm ..................................... 6-7

Watchman ............................................... 3-5

Magnetron ............................................. 5-3

Maintenance............................................ 5-1

Multiple Echoes....................................... 4-1

Menu tree .................................................. v

Zoom ....................................................... 2-8

IN-1

Download from Www.Somanuals.com. All Manuals Search And Download.

Echo Trimmer PAS 280 User Manual
Electro Voice Stereo Amplifier P 3000 User Manual
Ericsson Stereo Receiver RX8315 User Manual
Euro Pro Iron GI492H User Manual
Everpure Water Dispenser QC71 User Manual
Fisher Price Motorized Toy Car J0713 User Manual
Foxda Tech MP3 Player FM 6605 User Manual
Gaggenau Microwave Oven EB 260 261 User Manual
Generac Power Systems Portable Generator Transfer Switches and Accessories User Manual
Gitzo Camcorder Accessories G1345 User Manual