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SAFETY INSTRUCTIONS
"DANGER", "WARNING" and "CAUTION" notices appear throughout this manual. It is the
responsibility of the operator and the installer of the equipment to read, understand and
follow these notices. If you have any questions regarding these safety instructions, please
contact a FURUNO agent or dealer.
WARNING
Do not open the equipment.
WARNING
Do not disassemble or modify the
equipment.
Hazardous voltage which can
cause electrical shock, burn or
serious injury exists inside the
equipment. Only qualified
personnel should work inside
the equipment.
Fire electrical shock or serious injury can
result.
Turn off the power immediately if water
leaks into the equipment or the
equipment is emitting smoke or fire.
Wear a safety belt and hard
hat when working on the
antenna unit.
Continued use of the equipment can cause
fire or electrical shock.
Serious injury or death can
result if someone falls from
the radar antenna mast.
Do not place liquid-filled containers on
the top of the equipment.
Fire or electrical shock can result if a liquid
spills into the equipment.
Stay away from transmitting
antenna.
The radar antenna emits mi-
crowave radiation which can
be harmful to the human body,
particularly the eyes. Never
look directly into the antenna
radiator from a distance of
less than 1 m when the radar
is in operation.
CAUTION
Use the proper fuse.
Use of a wrong fuse can result in fire or
permanent equipment damage.
Do not use the equipment for other than
its intended purpose.
Turn off the radar power
switch before servicing the
antenna unit. Post a warn-
ing sign near the switch
indicating it should not be
turned on while the antenna
unit is being serviced.
Personal injury can result if the equipment
is used as a chair or stepping stool, for
example.
Do not place objects on the top of the
equipment.
Prevent the potential risk of
someone begin struck by the
rotating antenna and expo-
sure to RF radiation hazard.
The equipment can overheat or personal
injury can result if the object falls.
i
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FOREWORD
Features
Congratulations on your choice of the
FURUNO MODEL 1832/1932/1942 Marine
Radar. We are confident you will see why the
FURUNO name has become synonymous with
quality and reliability.
Your radar has a large variety of functions, all
contained in a remarkably small cabinet.
The main features of the MODEL 1832/1932/
1942 are:
For over 50 years FURUNO Electric Company
has enjoyed an enviable reputation for innova-
tive and dependable marine electronics equip-
ment. 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 antenna motor.
¡ On-screen alphanumeric readout of all op-
Your radar is designed and constructed to meet
the rigorous demands of the marine environ-
ment. However, no machine can perform its
intended function unless properly installed and
maintained. Please carefully read and follow
the recommended procedures for installation,
operation and maintenance.
erational information.
¡ Standard features include EBL (Electronic
Bearing Line), VRM (Variable Range
Marker), Guard Alarm, Display Off Center,
and Echo Trail.
¡ Watchman feature periodically transmits the
radar to check for radar targets which may
be entering the alarm zone.
While this unit can be installed by the purchaser,
any purchaser who has doubts about his or her
technical abilities may wish to have the unit
installed by a FURUNO representative or other
qualified technician. The importance of a
through installation can not be overemphasized.
¡ Ship’s position in latitude and longitude and
Loran C Time Differences, range and bear-
ing to a waypoint, and ship’s speed/ head-
ing/course can be shown in the bottom text
area. (Requires a navigation aid which can
output such data in IEC 1162 format.)
We would appreciate hearing from you, the end-
user, about whether we are achieving our pur-
poses.
¡ Zoom feature provided.
Thank you for considering and purchasing
FURUNO equipment.
iii
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TABLE OF CONTENTS
FOREWORD ...................................iii
SPECIFICATIONS ...........................v
EQUIPMENT LIST ........................viii
3. MENU OPERATION...................12
3.1 Basic Menu Operation ...................... 12
3.2 Selecting the Presentation Mode ...... 12
3.3 Magnifying Long Range Echoes (echo
stretch).............................................. 13
3.4 Echo Trail.......................................... 13
3.5 Suppressing Radar Interference ........ 14
3.6 Selecting Pulsewidth......................... 15
3.7 Guard Alarm ..................................... 15
3.8 Watchman ......................................... 16
3.9 Displaying Navigation Data ............. 17
3.10 OTHER MENU Description........... 18
3.11 Function Keys ................................. 19
3.12 Suppressing Noise .......................... 19
3.13 Adjusting Brilliance of Markers ..... 19
3.14 Outputting Target Position .............. 19
CONFIGURATION OF
MODEL 1832/1932/1942 .............x
1. PRINCIPLE OF OPERATION ......1
1.1 What is Radar? .................................... 1
1.2 How Ships Determined Position Before
Radar .................................................. 1
1.3 How Radar Determines Range ........... 1
1.4 How Radar Determines Bearing ......... 1
1.5 Radar Wave Speed and Antenna Rota-
tion Speed ........................................... 1
1.6 The Radar Display .............................. 1
4. FALS ECHOES ..........................20
2. BASIC OPERATION ....................3
4.1 Multiple Echoes ................................ 20
4.2 Side-lobe Echoes .............................. 20
4.3 Indirect Echoes ................................. 20
4.4 Blind and Shadow Sectors ................ 21
2.1 Control Description ............................ 3
2.2 Display Indications and Markers ........ 4
2.3 Turning the Radar On and Off ............ 5
2.4 Transmitting ........................................ 5
2.5 Stand-by .............................................. 5
2.6 Selecting the Range ............................ 6
2.7 Adjusting Picture Brilliance ................ 6
2.8 Adjusting Receiver Sensitivity ........... 6
5. MAINTENANCE & TROUBLE-
SHOOTING ................................22
5.1 Preventitive Maintenance ................. 22
5.2 Replacing the Fuse............................ 22
5.3 Troubleshooting ................................ 23
5.4 Self Test ............................................ 24
5.5 Life Expectancy of Magnetron ......... 24
2.9 Adjusting the A/C SEA Control (reduc-
ing sea clutter) .................................... 6
2.10 Adjusting the A/C RAIN Control
(reducing rain clutter)......................... 7
6. INSTALLATION .........................25
2.11 Erasing the Heading Line, North Mark
.......................................................... 8
6.1 Antenna Unit Installation .................. 25
6.2 Display Unit Installation ................... 30
2.12 Measuring the Range ........................ 8
2.13 Measuring the Bearing...................... 9
2.14 Using the Offset EBL ....................... 9
2.15 Shifting (off centering) the Picture . 10
2.16 Zoom ............................................... 11
6.3 Exchange of Fuse for 24/32V Power
Supply .............................................. 32
6.4 Checking the Installation .................. 32
6.5 Adjustments ...................................... 32
MENU TREE ............................. AP-1
ARP-10 (OPTION) .................... AP-2
Declaration of Conformity
iv
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monochrome CRT
MODEL 1832
SPECIFICATIONS
3. Range scale (nm):
Range, Range interval and no. of Rings:
0.125 (0.0625, 2), 0.25 (0.125, 4), 0.75
(0.25, 3), 1 (0.25, 4), 1.5 (0.5, 3), 2 (0.5, 4),
3 (1, 3), 4 (1, 4), 6 (2, 3), 8 (2, 4), 12 (3, 4),
16 (4, 4), 24 (6, 4), 36 (12, 3)
ANTENNA UNIT
4. Bearing resolution:
4°
5. Bearing accuracy:
6. Range discrimination:
7. Range ring accuracy:
0.9 % or range in use or 8 m, whichever is
larger
8. Minimum range: Better than 25 m
Within 1°
Better than 20 m
1. Radiator:
2. Radiator length:
3. Horizontal beamwidth: 3.9°
4. Vertical beamwidth:
Printed array
60 cm
20°
5. Sidelobe:
Within ± 20° of mainlobe; less than -18 dB
Outside ± 20° of mainlobe; less than -23 dB
9. Markers:
Heading line, Bearing scale, Range ring,
VRM 1/2, EBL 1/2, Tuning indicator,
Cursor, Alarm zone, North mark (heading
sensor input required)
6. Polarization:
Horizontal
7. Antenna rotation speed: 24 rpm
8. Wind resistance:
10. Alphanumeric indication:
Relative wind speed 100 knots (51.5 m/s)
Range, Range ring interval, Pulselength (SP,
MP, LP), Display mode (HU, CU, NU, TM),
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), Range to cursor, Bearing to
cursor, Echo trailing (TRAIL), Trail time,
Trail elapsed time, Navigation data (naviga-
tion input required), heading (HDG, heading
sensor input required)
TRANSCEIVER MODULE
(contained in radome)
1. Transmitting tube:
MG5248, E3571 or
MAF1421B
2. Frequency:
9410 MHz ±30 MHz
3. Peak output power:
4 kW nominal
4. Pulselength & pulse repetition rate:
11. Vibration:
0.08 µs, 2100 Hz (0.125, 0.25, 0.5, 0.75, 1.5)
0.3 µs, 1200 Hz (1.5, 2, 3)
Vibration
5 to 12.5 Hz
12 to 25 Hz
Total amplitude
± 1.6 mm
± 0.35 mm
± 0.10 mm
0.8 µs, 600Hz (3, 4, 6, 8, 12, 16, 24, 36)
5. Warmup time:
6. Modulator:
1:30
FET switching
method
25 to 50 Hz
12. Temperature:
Antenna unit;
Display unit;
13. Humidity:
-25 °C to + 70 °C
-15 °C to + 55 °C
7. I.F.:
60 MHz
8. Tuning:
3Automatic or
manual
Relative humidity 93% or less at + 40°C
14. Waterproofing:
Antenna unit;
IPX6
Display unit;
IPX5
9. Receiver front end:
10. Bandwidth:
MIC (Microwave
IC)
15. Power supply & power consumption:
Tx pulselength 0.3 µs and 0.08 µs: 25 MHz
Tx pulselength 0.8 µs: 3 MHz
12 V, 24 V or 32 VDC (10.2 V to 41.6 VDC)
50W
16. Protection feature:
11. Duplexer:
Circulator with diode
limiter
Protection against reverse polarity, overvolt-
age, overcurrent, and internal fault
17. Compass safe distance:
DISPLAY UNIT
1. Indication system:
2. Display:
PPI raster scan
10-inch rectangular
v
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MODEL 1932
MODEL 1942
SPECIFICATIONS
SPECIFICATIONS
ANTENNA UNIT
ANTENNA UNIT
1. Radiator:
Slotted waveguide
array
1. Radiator:
Slotted waveguide
array
2. Radiator length:
100 cm
2. Radiator length:
120 cm
3. Horizontal beamwidth: 3.9°
3. Horizontal beamwidth: 1.9°
4. Vertical beamwidth:
27°
4. Vertical beamwidth:
22°
5. Sidelobe:
5. Sidelobe:
Within ± 20° of mainlobe; less than -24 dB
Outside ± 20° of mainlobe; less than -30 dB
Within ± 20° of mainlobe; less than -24 dB
Outside ± 20° of mainlobe; less than -30 dB
6. Polarization:
Horizontal
6. Polarization:
Horizontal
7. Antenna rotation speed: 24 rpm
8. Wind resistance:
7. Antenna rotation speed: 24 rpm
8. Wind resistance:
Relative wind speed 100 knots (51.5 m/s)
Relative wind speed 100 knots (51.5 m/s)
TRANSCEIVER MODULE
(contained in antenna)
TRANSCEIVER MODULE
(contained in antenna)
1. Transmitting tube:
2. Peak output power:
3. Pulselength & pulse repetition rate:
MG5389 or E3560
6 kW nominal
1. Pulselength & pulse repetition rate:
0.08 µs, 2100 Hz (0.125, 0.25, 0.5, 0.75, 1.5)
0.3 µs, 1200 Hz (1.5, 2, 3)
0.8 µs, 600Hz (3, 4, 6, 8, 12, 16, 24, 36, 48)
0.08 µs, 2100 Hz (0.125, 0.25, 0.5, 0.75, 1.5)
0.3 µs, 1200 Hz (1.5, 2, 3)
0.8 µs, 600Hz (3, 4, 6, 8, 12, 16, 24, 36, 48, 64)
4. Bandwidth:
2. Others:
See MODEL 1832.
DISPLAY UNIT
Tx pulselength 0.3 µs and 0.08 µs: 25 MHz
Tx pulselength 0.8 µs: 5 MHz
5. Others:
See MODEL 1832.
1. Range scale (nm):
Range, Range interval and no. of Rings:
0.125 (0.0625, 2), 0.25 (0.125, 4), 0.75
(0.25, 3), 1 (0.25, 4), 1.5 (0.5, 3), 2 (0.5, 4),
3 (1, 3), 4 (1, 4), 6 (2, 3), 8 (2, 4), 12 (3, 4),
16 (4, 4), 24 (6, 4), 36 (12, 3), 48 (12, 4)
2. Compass safe distance:
DISPLAY UNIT
1. Range scale (nm):
Range, Range interval and no. of Rings:
0.125 (0.0625, 2), 0.25 (0.125, 4), 0.75
(0.25, 3), 1 (0.25, 4), 1.5 (0.5, 3), 2 (0.5, 4),
3 (1, 3), 4 (1, 4), 6 (2, 3), 8 (2, 4), 12 (3, 4),
16 (4, 4), 24 (6, 4), 36 (12, 3), 48 (12, 4), 64
(16, 4)
Standard compass Steering compass
Display unit
Antenna unit
0.75 m
1.1 m
0.6 m
0.8 m
2. Compass safe distance:
3. Others:
See MODEL 1832.
Standard compass Steering compass
Display unit
Antenna unit
0.75 m
1.0 m
0.6 m
0.74 m
3. Power supply & power comsumption:
12 V, 24 V or 32 VDC (10.2 V to 41.6 VDC)
52W
vi
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INTERFACE IEC 1162 ARPA FUNCTION
(NMEA0183)
(OPTION)
1. Internal Board
2. Acquisition
Instant selection of auto or manual acquisi-
tion in 0.2 - 16 nm, relative speed 100kt.
3. Tracking
ARP-10
(Input)
Own ship's position:
GGA>RMA>RMC>GLL
RMA>RMC>VTG>VHW
Speed:
Automatic tracking of up to 10 acquired
targets betwen 0.1 to 16 nm.
Heading (True):
4. Prediction of target motion
True or relative vectors, time scaled.
5. Past position
HDT>HDG*>HDM*>VHW>VHW*
Heading (Magnetic):
HDM>HDG*>HDT*>VHW>VHW*
10 past positions of tracked targets.
Course (True):
Course (Magnetic):
RMA>RMC>VTG
6. Alarm
Lost target. CPA/
TCPA
VTG>RMA*>RMC*
7. Automatic tracking range
0.1 - 16 nm
8. Target information (one target selected)
Waypoint (Range, Bearing): RMB>BWC>BWR
Loran time difference:
Water depth:
RMA>GLC>GTD
DPT>DBT
¡Distance and bearing from own ship to
target
¡Moving direction and speed
¡CPA (estimated Closest Point of Approach)
and TCPA (estimated Time to CPA)
Water temperature:
XTE:
*: Calculated value based Magnetic variation.
MDA>MTW
RMB>XTE>APB
9. Vector length
10. Plotting interval
30 sec. - 30 min.
15 sec. - 6 min.
(Output)
TLL: On using "TLL" Key.
RSD: An interval of four seconds.
TTM: ARP-10 (Option)
vii
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EQUIPMENT LIST
Complete Set
MODEL 1832
Name
1 Antenna Unit
2 Display Unit
Type
RSB-0071-057
RDP-118
Code No.
Qty
1
Remarks
1
Installation Materials CP03-16900
000-086-843
000-086-844
000-086-845
000-086-846
sig. cable assy. 10 m
sig. cable assy. 15 m
sig. cable assy. 20 m
sig. cable assy. 30 m
(select one)
CP03-16910
3
1 set
CP03-16920
CP03-16930
4 Accessaries
Spare Parts
FP03-06400
SP03-12200
000-086-872 1 set
000-086-965
5
1 set
MODEL 1932/1942
Name
Type
Code No.
Qty
1
1
Remarks
For MODEL1932
For MODEL1942
RSB-0061-054A
RSB-0062-055A
RDP-118
1 Antenna Unit
Display Unit
2
1
Installation Materials
(select one)
CP03-17000
CP03-17010
000-086-848
000-086-849
000-086-850
000-086-851
000-086-872 1 set
000-086-965 1 set
sig. cable assy. 10 m
sig. cable assy. 15 m
sig. cable assy. 20 m
sig. cable assy. 30 m
3
1 set
CP03-17020
CP03-17030
FP03-06400
SP03-12200
4 Accessaries
5 Spare Parts
Optional Equipment
Name
Type
Code No.
000-086-852
000-013-484
000-013-485
000-013-486
000-013-487
000-030-443
008-439-000
008-476-060
008-445-070
000-030-097
Qty
Remarks
1 ARP Board
Rectifier
ARP-10
1
PR-62
1832, 100V AC
1832, 110V AC
1832, 220V AC
1832, 230V AC
1932/1942, AC
1
2
RU-3423
1
1
1
1
1
3 Magnifying Lens
4 Flush Mount Kit
03-121-1500
OP03-145
5 Mounting Bracket (1) OP03-92
For MODEL1832
*See note 1.
6 External Buzzer
Cable Assy.
OP03-21
MJ-A6SPF0003-050
MJ-A6SPF0009-100
000-117-603
000-125-236
MJ-A6SPF0007-100
MJ-A6SPF00012-100
MJ-A6SPF00012-050
MJ-B24LPF0006-005
000-125-237
000-133-817
000-134-424
000-140-438
7
1
*See note 2.
Note 1) Even though the display unit meets waterproof standard IPX-5, the connection of external buzzer, radar
plotter and/or remote display can affect waterproofness. Watertight integrity cannot be guaranteed. When these
modification has been done, the display unit should not be mounted where exposed.
Note 2) Conversion from MCP connector (square type) to MJ connector (circular type).
viii
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Installation Materials
CP03-169xx (Model 1832)
Name
Type
Code No. Qty
Remarks
Select one.
Connector fitted.
1 Signal Cable 10m
Signal Cable 15m
Signal Cable 20m
Signal Cable 30m
MJ-B24LPF0002-100 000-138-972
MJ-B24LPF0002-150 000-138-970
MJ-B24LPF0002-200 000-138-974
MJ-B24LPF0002-300 000-138-973
1
Power Cable
03S9332
000-138-928
000-862-308
2
1 set
4
3 Slotted Head
Hex Bolt
M10 x 25 SUS304
Flat Washer
Spring Washer
EMC core
M10 SUS304
M10 SUS304
E04SS251512
000-864-131
000-864-261
000-144-673
4
5
6
4
4
1
CP03-170xx (Model 1932/1942)
Name
1 Signal Cable 10m
Signal Cable 15m
Signal Cable 20m
Signal Cable 30m
2 Power Cable
3 Seal Washer
4 Hex Bolt
Type
Code No.
MJ-B24LPF0002-100 000-138-972
MJ-B24LPF0002-150 000-138-970
MJ-B24LPF0002-200 000-138-974
MJ-B24LPF0002-300 000-138-973
Qty
Remarks
Select one.
Connector fitted.
1
03S9332
000-138-928
000-850-021
000-862-191
000-863-112
000-864-132
000-864-263
000-866-390
1
4
4
4
4
4
2
CW1053DX
M12 x 60 SUS304
M12 SUS304
M12 SUS304
M12 SUS304
10 x 45 SUS
5 Hex Nut
6 Flat Washer
7 Spring Washer
8 Slotted Pin
Spare Parts (SP03-12200)
Name
Type
Code No. Qty
Remarks
For 24/32 VDC
power supply
1 Fuse
2 Fuse
FGBO-A5A AC125V 000-549-064
2
For 12 VDC power
supply
FGBO 10A AC125V 000-549-065
03-129-1512-0 100-248-780
2
1
3 Label (5A )
For 24/32 VDC
Accessories (FP03-06400)
Name
1 Tapping Screw
2 Knob
Type
Code No. Qty
Remarks
6x20 SUS304
FP03-06402
FP03-06401
FP03-04810
000-802-084
008-479-320
008-479-310
008-441-400
5
2
1
1
3 Hanger
4 Hood Assy.
ix
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CONFIGURATION OF
MODEL 1832/1932/1942
Antenna Unit
(1932/1942)
(1832)
IEC 1162* (In/Out)
IEC 1162* (In)
Remote Display
FMD-811/1800
NAV
Display Unit
RDP-118
Video Sounder
External Alarm
Buzzer OP03-21
Gyro Converter
AD-100
Auto Plotter
ARP-10
Gyro
Rectifier
PR-62(1832),
RU-3423(1932/1942)
12 VDC: 5A
24 VDC: 10A
*Equivalent to NMEA 0183
: Option
: Local Supply
12/24/32 VDC
115/230 VAC
Note: Even though the display unit meets waterproof standard IPX-5, the connection of external
buzzer, radar plotter and/or remote display can affect waterproofness. Watertight integrity cannot
be guaranteed. When these modification has been done, the display unit should not be mounted
where exposed.
x
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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 radar
scanner antenna is pointing when it emits an
electronic 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 di-
rection 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 indi-
cated how far the ship was from the cliffs or the
shore. The direction from which the echo was
heard indicated the relative bearing of the shore.
1.5 Radar Wave Speed and
Antenna 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 rotation of the
antenna. By the time radar echoes 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 reception
of the reflected echo. It is a known fact that ra-
dar 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 distance to the tar-
get. 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 automatically 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 diagram, with
the transmitting ship’s position at the center.
Images of target echoes are received and dis-
played at their relative bearings, and at their
distance from the PPI center.
With a continuous display of the images of tar-
gets, the motion of the transmitting ship is also
displayed.
1
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Heading line
Targets
Range and bearing
of a target, relative
to own ship, are
readable on the PPI.
A
D
A
D
B
B
C
C
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
2
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2. BASIC OPERATION
2.1 Control Description
Omnipad
Brief press:
Shifts cursor, VRM and EBL;
select items and options on
menu.
Displays the data of target
selected with the cursor.
Long press:
Terminates plotting of the target
selected with the cursor.
(1) Acquires the target selected
with the ominipad.
(2) Registers selection on
SELECT
CANCEL
ACQ
ENTER
Opens/closes menus.
menus.
Selects
EBL1/EBL2/VRM1/VRM2.
Sets guard zone area.
Selects radar range.
MENU
GUARD
Control:
Adjusts sensitivity.
RANGE
Switch:
EBL/VRM
SELECT
EBL/VRM
CONTROL
Temporarily erases heading
line (and north mark 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.
F1
A/C RAIN
ST BY
TX
Sets radar in stand-by;
transmits radar pulse.
Control:
Reduces rain clutter.
F2
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
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2.2 Display Indication and Markers
Tuning indicator (P.6)
Echo trail elapsed time (P.13)
Heading (requires heading data)
Heading line (P.8)
Echo trail time (P.13)
Guard Zone (P.15)
Zoom (P.11)
AUTO
HDG 234.5°
TRAIL
Range (P.6)
25 : 38
. 125NM
. 0625
SP
Echo Stretch (P.13)
30M
G (OUT)
ZOOM
Range ring interval (P.6)
Pulselength (P.6)
ES1
HU
OFFCENTER
Off center (P.10)
EBL2 (P.9)
Display mode (P.12)
Cursor (P.8, 9)
Guard zone area (P.15)
EBL1 (P.9)
VRM1 (P.8)
Range ring (P.8)
VRM2 (P.8)
North mark (P.8)
A/C
AUTO
EBL
345.6°R
23.0°R
A/C AUTO (P.7)
IR2
VRM
0.048NM
0.100NM
EBL1 bearing (P.9)
EBL2 bearing (P.9)
13.5°R
0.142NM
Interference rejector (P.14)
Cursor bearing (P.9)
VRM1 range (P.8)
VRM2 range (P.8)
Cursor range (P.8)
Figure 2-2 Display indications
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2.3 Turning the Radar On/Off
2.5 Stand-by
Press the [POWER] key to turn the radar on or
off.
When you won’t be using the radar for an ex-
tended 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 setting.
(More on menu operation later.)
The control panel lights and a timer displays
the time remaining for warm up of the magne-
tron (the device which produces radar pulses),
counting down from 1:30 to 0:01.
Economy mode
2.4 Transmitting
The CRT can be set to automatically turn itself
off when in stand-by, to reduce power consump-
tion. 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 magnetron
has warmed up, STBY (Stand-By) appears at
the screen center. This means the radar is now
fully operational. In stand-by the radar is avail-
able for use at anytime - but no radar waves are
being transmitted.
Navigation data display during
stand-by
Press the [STBY TX] key to transmit.
When transmitting, any echoes from targets
appear on the display. This radar displays ech-
oes in eight tones of green according to echo
strength.
If a navigation aid inputs navigation data to this
radar, navigation data can be displayed during
stand-by. You can turn the navigation data dis-
play on/off through the menu. Figure 2-3 shows
a typical navigation data display during stand-
by.
SPEED
TRIP
Time-to-go to Stand-by
ST-BY
000.3 nm
Speed
10.5
kt
DEPTH
TEMPERA+TU1RE7.3
Depth
125
Trip distance since power on
m
°C
E
To Waypoint
bearing Heading
HDG
092.5°
Heading
Course
CRS 180.0°M
Time-to-go to
TO Waypoint
WPT
BRG
RNG
TTG
01:08
45.0° M
12.0NM
N
S
OWN SHIP
Bearing TO Waypoint
Range to TO Waypoint
LAT 30°00.00N
LON 135°00.00E
Ship's position in
latitude and longitude
and Loran TDs
TD
36378.1
59096.4
XTE
R 0.3NM
Cross Track Error
Mark "
direction and amount
of error.
" shows
W
L
XTE
XTE
R
0.5
1.0
1.0
0.5
Figure 2-3 Typical navigation data display
during stand-by
5
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Note 1: Availability of a particular display item
depends on incoming data.
2.8 Adjusting Receiver Sensitivity
The [GAIN] control adjusts the sensitivity of
the receiver. It works in precisely the same
manner as the volume control of a broadcast
receiver, amplifying the signals received.
Note 2: When Range to Waypoint reaches 0.1
nm, the WPT mark jumps to dead
ahead even though a difference may
exist between heading and BRG to
WPT.
The proper setting is such that the background
noise is just visible on the screen. If you set up
for too little sensitivity, weak echoes may be
missed. On the other hand excessive sensitivity
yields too much background noise; strong tar-
gets may be missed because of the poor con-
trast between desired echoes and the
background noise on the display.
Note 3: When cross track error exceeds 1 nm
on either side, the XTE mark starts
blinking.
2.6 Selecting the Range
The range selected automatically determines the
range ring interval, the number of range rings,
pulselength and pulse repetition rate, for opti-
mal 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 corner
of the display.
2.9 Adjusting the A/C SEA
Control (reducing sea
clutter)
Echoes from waves can be troublesome, cover-
ing the central part of the display with random
signals known as “sea clutter.” The higher the
waves, and the higher the scanner above the
water, the further the clutter will extend. Sea
clutter appears on the display as many small
echoes which might affect radar performance.
(See the left-hand figure in Figure 2-4.) When
sea clutter masks the picture, adjust theA/C SEA
control to reduce the clutter.
To select a range;
Press the [- RANGE +] key. The range and range
ring interval appear at the top left corner on the
display.
Tips for selecting the range
¡ When navigating in or around crowded har-
bors, select a short range to watch for pos-
sible collision situations.
How the A/C SEA control works
The [A/C SEA] control reduces the amplifica-
tion of echoes at short ranges (where clutter is
the greatest) and progressively increases am-
plification as the range increases, so amplifica-
tion will be normal at those ranges where there
is no sea clutter.
¡ If you select a lower range while on open
water, increase the range occasionally to
watch for vessels that may be heading your
way.
2.7 Adjusting Picture Brilliance
The [BRILL] key adjusts the brilliance of the
radar picture in sixteen levels.
Press the [BRILL] key to set the brilliance level.
The current level momentarily appears on the
screen.
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Adjusting the A/C SEA control
2.10 Adjusting the A/C RAIN
Control (reducing rain
clutter)
The proper setting of the A/C SEA should be
such that the clutter is broken up into small dots,
and small targets become distinguishable.
The vertical beamwidth of the antenna is de-
signed 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 targets. Figure 2-5
shows the appearance of rain clutter on the dis-
play.
If the control is set too low, targets will be hid-
den in the clutter, while if it is set too high, both
sea clutter and targets will disappear from the
display. In most cases adjust the control until
clutter has disappeared to leeward, but a little
is still visible windward.
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 pattern, mak-
ing recognition of solid targets easier.
2. Adjust the [A/C SEA] control so small tar-
gets are distinguishable but some clutter re-
mains on the display.
Appearance of
rain clutter
A/C RAIN control adjusted;
rain clutter suppressed.
Sea clutter at
display center
A/C SEA control adjusted;
sea clutter suppressed.
Figure 2-4 How to adjust the A/C SEA control
Figure 2-5 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 cir-
cuit activated the receiver is less sensi-
tive. Therefore, turn off the circuit when
its function is not required.
A common mistake is to over-adjust the circuit
so all the clutter is removed. As an example set
up for maximum A/C SEA. You will see how
the center of the display becomes dark. This
dark zone can be dangerous (targets may be
missed), especially if the sensitivity is not prop-
erly adjusted. Always leave a little clutter vis-
ible 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 dis-
play when theA/CAUTO circuit is on. You can
fine tune by adjusting the [A/C SEA], [A/C
RAIN] and [GAIN] controls.
7
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2.11 Erasing the Heading Line,
North Mark
VRM
5.3°NM
12.5°NM
EBL
345.6°R
23.0°R
The heading line or north mark (available with
gyrocompass connection) may occasionally
mask a target. To view the target, you can tem-
porarily erase the heading line and north mark
by pressing and holding down the [GAIN (HM
OFF)] control. Release the control to re-display
the marks.
Figure 2-7 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.
3. Operate the omnipad to place the outside
edge of the VRM on the inside edge of the
target.
Heading
line
4. Check the VRM readout at the bottom right-
hand corner of the display to find the range
to the target.
5. To anchor the VRM, press the [EBL/VRM
CONTROL] key.
North mark
To erase the VRM, press and hold down the
[EBL/VRM CONTROL] key about two sec-
onds.
Figure 2-6 Heading line and north mark
2.12 Measuring the Range
Range
6.0 NM
Range ring
interval
2.0
You can measure the range to a target three
ways: by the range rings, by the cursor, and by
the VRM (Variable Range Marker).
Target
Cursor
VRM1
VRM2
By range ring
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.
VRM1
range
VRM
4.0 NM
3.0 NM
Cursor range
4.0 NM
VRM2
range
By cursor
Figure 2-8 Measuring range by the cursor,
range rings and VRM
Operate the omnipad to place the cursor inter-
section 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.
Note: You can display the range readout of the
VRM and cursor in nautical miles, statute miles
or kilometers. For details see the next chapter.
By VRM
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.
8
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Note: The bearing readout for the EBL and the
cursor can be displayed in relative or true
bearing (true bearing requires heading
sensor input). For north up and course
up display modes the bearing reference
is always true. For details see the next
chapter.
2.13 Measuring the Bearing
There are two ways to measure the bearing to a
target: by the cursor, and by the EBL(Electronic
Bearing Line).
By cursor
Tips for measuring bearing
Operate the omnipad to bisect the target with
the cursor intersection. The bearing to the tar-
get 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.
By EBL
¡ Bearings of stationary or slower moving tar-
gets are more accurate than bearings of faster
moving targets.
1. Press the [EBL/VRM SELECT] key to cir-
cumscribe an EBL readout (at the bottom
left-hand corner). Each press of the key se-
lects 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 changing the
range scale; angular difference becomes dif-
ficult to resolve as a target approaches the
center of the display.
2. Press the [EBL/VRM CONTROL] key to
enable control of the omnipad.
3. Operate the omnipad to bisect the target with
the EBL.
2.14 Using the Offset EBL
The offset EBL provides two functions: predict
collision course of radar target and measure 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.
5. To anchor the EBL, press the [EBL/VRM
CONTROL] key.
Predicting collision course
1. Press the omnipad to place the cursor on the
center of the target.
To erase the EBLand its readout, press and hold
down the [EBL/VRM CONTROL] key about
two seconds.
2. Press the [EBL/VRM SELECT] key to
choose EBL1 readout and then press the
[EBL/VRM CONTROL] key.
6.0 NM
2.0
3. Select EBL OFFSET on the menu and press
the [ACQ/ENTER] key.
Target
Cursor
EBL1
4. Press the [EBL/VRM CONTROL] key.
5. Operate EBL1 so it passes through the cen-
ter of the target.
EBL2
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.
Cursor
Bearing
EBL
40.0° R
135.0° R
EBL1 bearing
EBL1 bearing
40.0°R 4.0 NM
To cancel, select EBL OFFSET and press the
[ACQ/ENTER] key.
Figure 2-9 How to measure bearing by EBL
and cursor
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6.0 NM
2.0
EBL1
B
EBL1 origin
(initial position
of target)
VRM1
VRM1
A
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 2-10 Predicting collision course by
using the offset EBL
Figure 2-11 Measuring the range and bearing
between two targets by using the offset EBL
Measuring range and bearing between
two targets
2.15 Shifting (off centering) the
Picture
The procedure which follows shows how to
measure the range and bearing between target
“A” and target “B” in Figure 2-11.
Your vessel’s position can be shifted up to 75%
of the range in use to view the situation around
your vessel without changing the range or size
of targets.
1. Press the omnipad to place EBL1’s origin
(cursor) on the center of target “A”.
2. Press the [EBL/VRM SELECT] key to
choose EBL1 readout and then press the
[EBL/VRM CONTROL] key.
1. Press the omnipad to set cursor where de-
sired.
2. Press the [F1 (A/C SEA)] control if its func-
tion is set for SHIFT (default setting), or se-
lect SHIFT on the menu. OFFCENTER
appears at the top right corner of the display
when the picture is shifted.
3. Select EBL OFFSET on the menu and press
the [ACQ/ENTER] key. EBL1’s origin shifts
to cursor.
4. Press the [EBL/VRM CONTROL] key.
5. Press 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 VRM1 readout. Press 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
Cursor
1 Place cursor
where desired.
2 Press SHIFT ZOOM
key to off center display.
7. To cancel, select EBL OFFSET on the menu
and press the [ACQ/ENTER] key.
Figure 2-12 Shifting the picture
Cancelling shifted picture
Press the [F1 (A/C SEA)] control again.
10
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2.16 Zoom
The zoom feature allows you to double the size
of the area between your vessel and any loca-
tion 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 select
ZOOM on the menu. Zoom appears at the
top right corner when the ZOOM function is
on.
Cursor
Cursor
2
1
Press [F1] to zoom.
Place cursor
where desired.
Figure 2-13 Zoom function
Note 1: Zoom is cancelled when range or pre-
sentation mode is changed.
Cancelling zoom
Press the [F1 (A/C SEA)] control again.
11
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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
on the menu with the omnipad. The complete
menu appears on page AP-1.
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.
With heading sensor connection the display
and the display mode indication at the top left-
hand corner of the display change in the se-
quence 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 connection, 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
MENU
ARP-10
MENU
4. Press the [MENU] key to close the menu.
Note: The radar begins operation with last se-
lected display mode (except course up) when-
ever the unit is turned on. Note however that
head up is selected when course up was the
last used mode.
Figure 3-1 Main menu
2. Press the omnipad to select the item. For
example, select RINGS.Amessage appears
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 line is
at the top of the display. This mode is useful
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 line, at the top of the display. To
get heading desired, steer vessel in direction
desired, and then show “CU” at the top left-
hand corner of the display.
North up
North is at the top of the display and the head-
ing line moves with ship’s heading. This mode
is useful for determining ship’s position and
as a navigation monitor on a nautical chart.
The picture is stabilized against yaw of ves-
sel, thereby reducing of target echoes.
Figure 3-2 Messages for RINGS menu
4. Press the [MENU] key to close the menu.
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True motion
3.4 Echo Trail
True motion displays own ship and moving
objects in their 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.
3.3 Magnifying Long Range
Echoes (echo stretch)
Starting echo trail
Normally, the reflected echoes from long
range targets appear on the display as weaker
and smaller blips even though they are com-
pensated by the radar’s internal circuitry. 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.
1. Press the [MENU] key to open the menu.
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.
2. Select “ES”.
3. Each press the [ACQ/ENTER] key changes
the echo stretch function 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.
Figure 3-4 How the echo trail feature works
TRAIL, the echo trail time selected (on
“OTHER MENU”) and elapsed time appear
at the top right-hand corner of the display.
Then, afterglow starts extending from all tar-
gets.
Bearing
direction
Bearing
direction
Note: Trails are restarted when range or mode
is changed or zoom or shift is turned on.
Range
direction
Fixed time trail
1. When the elapsed time clock counts up to
the trail time selected, the elapsed time dis-
play freezes.
Echo stretch 2
Echo stretch 1
2. The oldest portions of trails are erased so
only the latest trail, equal in length to the
trail time selected, is shown.
Figure 3-3 Echo stretch
Note: This function magnifies not only tar-
gets but also sea clutter and radar interference.
For this reason be sure the controls for ad-
justment of sea clutter and radar interference
are properly adjusted before activating the
echo stretch.
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.
Note: ES2 is not available on Short Range.
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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.
Cancelling echo trail
Select “OFF (deactivate)” at “ECHO TRAIL”
on the menu.
Changing trail attributes
Trail gradation and trail time can be selected
on the OTHERS menu.
Figure 3-5 Radar interference
Four levels of interference are available, in-
cluding off; IR1, IR2, IR3 and OFF. IR3 pro-
vides the highest level of rejection.
Table 3-1 Trailing attributes
Item in
OTHERS
menu
1. Press the [MENU] key.
Description
2. Select “OTHER MENU” and press the
[ACQ/ENTER] key.
Trails can be shown in
single or multiple
gradations. Multiple paints
trails getting thinner with
time just like the afterglow
on an analog PPI radar.
[ OTHERS ]
Select item by omnipad
and press ENTER key.
Trail
Tone
¡. Panel Dimmer
2 . Mark Brill
1
2
3
3
3
3
¢
¢
¢
¢
1
2
Single
Multiple
3 . HD Mark
1
2
4 . Characters
5 . Trail Tone
6 . Int Reject
1
2
Single
Off
Short
Off
15S
Multi
1
2
3
Trail time can be set for 15
sec., 30 sec., 1 min., 3 min.,
6 min., 15 min., 30 min., or
continuous.
7 . Pulselength
8 . Noise Reject
9 . Trail Time
Long
On
30S
Trail Time
1M
3M 6M
15M 30M
Manu
Cont
10. Tune
Auto
Off
11. Disp Data
12. WPT Mark
13. EBL Ref
Nav
On
ARP All
Off
Rel
True
km
3.5 Suppressing Radar
Interference
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
nm
sm
Off
5M
10M 20M
Nav
Norm
In
Econo
Out
TD
L/L
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 from of curved spokes. Interference ef-
fects are distinguishable form normal echoes
because they do not appear in the same place
on successive rotations of the antenna.
R/B
Low
Off
L/L
Mid
On
Hig
1/ 2 3/4
1/8 1/4
1
1.5
8
⁄
2
£
4
§
‹
16
¤
23. Self Test
24. Installation Setup
Figure 3-6 OTHER MENU
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Out alarm
3. Select “6. IntReject”.
The alarm sounds on targets exiting the guard
zone. “G (OUT)” appears at the top right-hand
corner when the Out alarm is selected.
4. Select level desired by operating the
omnipad.
5. Press the [ACQ/ENTER] key.
6. Press the [MENU] key to close the menu.
IR and level selected appears at the bottom
right corner on the display when the interfer-
ence rejection circuit is turned on.
Dashed line:
no alarm
Guard
zone
3.6 Selecting Pulsewidth
IN ALARM
OUT ALARM
Pulsewidth is the transmission time of a single
radar pulse. The longer the pulsewidth the
greater the direction range capability, however
range accuracy and range resolution are re-
duced.
Figure 3-7 In and Out alarm
Setting a guard zone
Preparation
1. Press the [MENU] key, and then select
“OTHER MENU” and pressing the [ACQ/
ENTER] key.
Pulsewidth can be selected to short or long
on the 1.5 and 3 nautical mile ranges.
1. Press the [MENU] key.
2. Select “17. Guard Mode” and “In” (alarm
on target entering zone) or “Out” (alarm
on target exiting zone) by operating the
omnipad.
2. Select “OTHER MENU” and press the
[ACQ/ENTER] key.
3. Select “7. Pulselength”.
3. Press the [ACQ/ENTER] key.
4. Press the [MENU] key to close the menu.
To set a guard zone
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. Mentally create the guard zone you want
to set.
3.7 Guard Alarm
2. Operate the omnipad to set the cursor on
pointAor 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 aster-
isk indicates the guard zone is partially set.)
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 brinks to call the
operator’s attention.
3. Operate the omnipad to set the cursor on
point C or D. See Figure 3-8 (3).
Selection of guard zone type
4. Press the [GUARD] key. The asterisk dis-
appears. See Figure 3-8 (4).
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.
In alarm
The alarm sounds on targets entering the guard
zone. “G (IN)” appears at the top right-hand
corner when the In alarm is selected.
15
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¡ Atarget echo does not always mean a land-
mass, reef, ships or surface objects but can
imply returns from sea surface or precipi-
tation. 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 system does
not overlook target echoes.
Asterisk blinking
Guard zone
* G (IN)
to set
A
A
B
D
C
Drag cursor
here.
(1) Mentally create
the guard zone to set.
(2) Drag cursor to
top left corner of
zone and press
[GUARD].
3.8 Watchman
The watchman function periodically transmits
the radar for minute to check for targets in a
guard zone. If it finds change in the zone from
the previous transmission it sounds 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 spe-
cific area.
G (IN)
G (IN)
Guard
zone
C
Drag cursor
here.
(3) Drag cursor to
(4) Guard zone
completed.
bottom right corner
of zone and press
[GUARD].
Tx
St-by
St-by
Tx
1 min
5, 10 or
20 min
1 min
5, 10 or
20 min
Figure 3-8 How to set the guard zone
Watchman
starts.
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
acknowledgrd. Press the key again to reacti-
vate the alarm.
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.
Notes on the guard alarm
Turning on watchman
¡The alarm is a useful anti-collision aid, but
does not relieve the operator of the respon-
sibility to also keep a visual lookout for
possible collision situations.
1. Create a guard zone (usually 360 degrees)
with the guard alarm function.
2. Press the [MENU] key.
3. Select “OTHER MENU”.
4. Press the [ACQ/ENTER] key.
5. Select “15. Watchman”.
¡When the radar range is less than one half
of the guard zone range, the guard zone dis-
appears and “G (IN)” or “G (OUT)” ap-
pears in inverse video. If this happens, raise
to re-display the guard zone.
6. Press the omnipad to select watchman rest
period; 5 minutes, 10 minutes or 20 min-
utes.
16
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“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.
¡range, bearing and time-to-go to both
waypoint selected on the navigator and the
cursor
¡speed.
(If the navigation input includes destination
data, waypoint position is denoted on the ra-
dar display by a dashed ring.)
Cancelling watchman
Go into the “OTHERS” menu, and set “15.
Watchman” for off.
To turn navigation data on or off;
1. Press the [MENU] key.
Note 1: Watchman can be used without a
guard zone.
2. Select the “DISP DATA”.
3. Press the [ACQ/ENTER] key.
Note 2: The alarm sounds just before the ra-
dar starts and stops transmitting.
4. Press the [ACQ/ENTER] key to select the
message for Navigation display.
3.9 Displaying Navigation Data
5. Prss the [ACQ/ENTER] key to set.
Navigation data can be displayed at the screen
bottom if this radar receives navigation input
in IEC 1162 format. Navigation data include
6. Press the [MENU] key to close the menu.
¡position in latitude and longitude or Lo-
ran-C time difference
AUTO
TRAIL
HDG 234.5°
25:38
30M
. 125NM
G (OUT)
ZOOM
ES1
.
0625
SP
HU
Waypoint Mark
A/C
AUTO
EBL
345.6°R
23.0°R
VRM
0.048NM
1.5 NM
13.5°R
0.06
0.142NM
0.100NM
OWN SHIP
34° 56. 12N
135° 34. 56E
SPD 35.0KT
+
CURSOR
WAYPOINT
0.09 NM
Navigation
Data
34° 29. 98N
136° 35. 77E
TTG 01:00
50.0°M
TTG 00:20
Figure 3-10 Typical navigation data display
17
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3.10 OTHER MENU Description
The following summarizes the OTHER MENU.
Table 3-2 OTHER MENU Description
Item
1. Panel Dimmer
2. Mark Brill
3. HD Mark
4. Charactors
5. Trail Tone
6. Int Reject
7. Pulselength
8. Noise Reject
9. Trail Time
10. Tune
Description
Select level of panel backlight.
Select brilliance of VRM, EBL, cursor, guard zone and WP marks.
Select brilliance of heading mark.
Select brilliance of charactors.
Select brilliance of echo trails.
Select level of interference rejection.
Select pulselength for 1.5 and 3 mile ranges.
Select “On” to reject noise.
Select the trail time.
Select automatic or manual tuning.
To tune manually;
1. Select “Menu” by the omnipad.
2. Press the [ENTER] key to enable manual tuning.
3. While pressing and holding down the [GAIN] control, operate
the omnipad.
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.
12. WPT Mark
13. EBL Ref
Select “On” to display the waypoint mark.
select EBL reference for relative or true.
14. VRM Unit
Select distance unit of VRM and cursor for nm, km or sm.
15. Watchman
16. STBY Disp
Turn watchman on (set rest period) or off.
Select the display on stand-by; display “STBY” or navigation data,
or go into the economy mode.
17. Guard Mode
18. Own Position
19. Cursor Posi
20. Alm sense LV
21. Dead Sector
22. Range
Select condition which triggers guard alarm; in or out.
Display the cursor position in strength whitch trigger guard alarm.
Dispalay the cursor position in range/bearing or lat/long.
Select minimau echo strength which triggers guard alarm.
Select “On” to display the dead sector.
Select ranges in use.
23. Self Test
Test keys, ROM and RAM, check antenna rotation speed, and
display program no.
24. Installation Setup Go to the installation setup menu.
18
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3.11 Function Keys
3.12 Suppressing Noise
The function keys (F1 and F2) work like the
auto-dialing feature of a telephone, automati-
cally executing the function assigned to them.
The function can be turned off by pressing
appropriate function key again.
Electrical noise can be suppressed by turning
on “8. NOISE REJ” on the OTHERS menu.
3.13 Adjusting Brilliance of
Markers
Default settings
“2. Mark Brill” on the OTHER menu adjusts
the brilliance of markers such as the cursor.
F1: Shift (brief press) or Zoom (long press)
F2: Ring brillience
3.14 Outputting Target Position
How to register menu items
1. Press the [MENU] key.
Target position data can be output to the
navaid in IEC 1162 format. Press and hold
down the [TLL] key to output the data. This
function requires position data and heading
signal.
2. Press [A/C SEA] (F1) or [A/C RAIN] (F2)
to open the function menu.
[ SETTING FOR F1 KNOB ]
SSel by omnipad & press ENT.S
<Press MENU key to escape>
EBL
OFFSET
SHIFT/
ZOOM
SHIFT
ZOOM
DISP
DATA
STBY
DISP
RINGS
MODE
INT
REJECT
NOISE
REJECT
PULSE
LENGTH
ECHO
STRTCH
TRAIL
TONE
TRAIL
ON/OFF
TRAIL
TIME
TUNE
A/M
ALARM
LEVEL
GUARD
IN/OUT
DEAD
SECTOR
WATCH
MAN
PANEL
DIMMER
MARK
BRILL
CHARA
CTERS
OTHER
MENU
VRM
UNIT
EBL
REF
NAV
TALKER
WPT
MARK
OWN
POSITN
CUSOR
POSITN
VECTOR
REF
VECTOR
LENGTH
HIS
TORY
COLLI
SION
AUTO
ACQ
NO
FNCTN
Figure 3-11 Function menu
3. Select function desired.
4. Press the [ACQ/ENTER] key.
5. Press the [MENU] key to close the menu.
19
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sented 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 tar-
gets. They can be reduced through careful re-
duction of the sensitivity or proper adjustment
of the A/C SEA.
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 her-
self with the appearance and effects of these
false echoes, so as not to confuse them with
echoes from legitimate contacts.
True echo
Main-lobe
Side-lobe
4.1 Multiple Echoes
Sprious
target
Multiple echoes occur when a short range,
strong echo is received from a 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 tar-
get as shown in Figure 4-1. Multiple reflection
echoes can be reduced and often removed by
decreasing the sensitivity or properly adjusting
the A/C SEA.
Antenna
Figure 4-2 Side-lobe echoes
4.3 Indirect Echoes
Indirect echoes may be returned from either a
passing ship or returned from a reflecting sur-
face on your own ship, for example, a stack. In
both cases, the echo will return from a legiti-
mate contact to the antenna by the same indi-
rect 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 follows:
True
echo
• they usually occur in a shadow sector
Own ship
Multiple
echo
• they appear on the bearing of the obstruc-
tion but at the range of the legitimate con-
tact
• when plotted, their movements are usually
abnormal, and
Figure 4-1 Multiple echoes
• their shapes may indicate they are not direct
echoes.
4.2 Side-lobe Echoes
Every time the antenna rotates, some radiation
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 repre-
20
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4.4 Blind and Shadow Sectors
Heading
line
Direct
path
Funnels, stacks, masts, or derricks in the path
of antenna may reduce the intensity of the ra-
dar 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 tar-
gets at close range may not be detected while
larger targets at much greater ranges may be
detected. See Figure 4-4.
Target
Indirect
path
Obstruction
(mast, funnel.
etc.)
Antenna
Target
True
echo
Indirect
path
Indirect
echo
Vessel taller
Direct
path
Mast, etc. in
than wharf
path of radar
beam
Wharf
Heading
line
Own
ship
True
echo
Bridge
Wharf
Blind sector
(no echo)
Indirect
echo
Size of blind sector
depends on target
size and range.
Indirect
echo
Figure 4-4 Blind and shadow sectors
Figure 4-3 Indirect echoes
21
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5. MAINTENANCE & TROUBLESHOOTING
This chapter tells you how to keep your radar
in good working order. Before reviewing this
5.1 Preventative Maintenance
chapter please read the safety information which
follows.
Regular maintenance is important for good per-
formance. 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 established
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
The fuse in the power cable protects the equip-
ment against reverse polarity or ship’s mains,
overcurrent, and equipment fault. If the fuse
blows, find the cause before replacing it. Never
use an incorrect fuse – serious damage to equip-
ment may result and void the warranty.
RF RADIATION HAZARD
The radar antenna emits high frequency
radio radiation which can be harmful,
particularly to your eyes.
Never look directly into the antenna 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 antenna unit.
12 V:
10 A fuse
24/32 V: 5 A fuse
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.
antenna unit Replace them if heavily
corroded.
Antenna
radiator
Check for dirt and cracks on
radiator surface. Thick dirt
Do not use plastic solvent
(acetone) for cleaning. If you
need to remove ice from
antenna unit, use a wooden
(1932/1942) should be wiped off with soft
cloth dampened with fresh
water. If a crack is found, apply a hammer or plastic head
slight amount of sealing
compound or adhesive as a
temporary remedy, then call for
hammer. Crack on the unit may
cause water ingress, causing
serious damages to internal
Radome
cover
(1832)
Check for wear. Permanent
damage to the antenna's internal temporarily repaired by using a
circuitry will result if water leaks
into the radome.
If a crack is found it should be
small amount of sealing
compound or adhesive. You
should then contact your dealer
for service.
6 months Display unit
to 1 year connectors
Check for tight connection and
corrosion.
If corroded, contact your dealer
for replacement.
22
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5.3 Troubleshooting
Table 5-2 contains simple troubleshooting pro-
cedures which you can follow to try to restore
normal operation. If you cannot restore normal
operation, do not attempt to check inside any
unit of the radar system.Any repair work is best
left to a qualified technician.
Table 5-2 Troubleshooting table
If...
But...
Then...
you pressed the
[POWER] key to
turn on the radar
the control panel
does not light
• try adjusting the control panel back-
lighting on the OTHERS menu.
• battery may have discharged.
• check fuse in power cable.
nothing appears on
the display or display
contrast is poor
• try adjusting the brilliance.
characters are
distorted
• request service.
the radar has
warmed up and you
pressed the
[STBY TX] key to
transmit
the antenna does not
rotate
• the problem may be in antenna 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 • the problem may be in the antenna
sweeping around the
display) is not
unit. Request service.
synchronized with
antenna rotation
there is no change in
sensitivity
• request service.
a key is pressed
nothing happens
• key may be faulty. Request service.
23
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7. Press the [MENU] key to back to the selftest
menu.
5.4 Self Test
The self test facility checks the keyboard, ROM
and RAM for proper operation.
8. To escape from the test, press the [MENU]
key.
1. Press the [MENU] key.
2. Select “OTHER MENU”.
5.5 Life Expectancy of
Magnetron
3. Select “23. Self Test” and press the [ACQ/
ENTER] key. The following display appears.
The following table shows the life expectancy
of the magnetron.
[ Self Test ]
Key test: Press each key and
check on-screen indication
lights.
Table 5-3 Life expectancy of magnetron
ARP-10 TEST
OK 18990871xx
OK
ROM
RAM
SPEED OK NAV 0.0KT
Model
Type
Code no.
Life expectancy
COURSE OK
TRIGGER NG
167.6°
al
l
E3571
000-137-527
VIDEO
BP
HP
NG
OK
OK
1832/
1932
MG5248
MAF1421B
E3560
000-116-121
–
2,000 - 3,000 hours
(Including stand-by)
MIN-HIT
0003
SCAN-TIME
MAN-ACQ
AUTO-ACQ
FE-DATA1
FE-DATA2
0854
00
00
0000
0000
000-139-050
000-135-146
1942
MG5389
Program No.: 0359139-1XX
ROM
RAM
:
: OK
O
K
Hours in use: 000006.9H
Tx hours : 000001.1H
<Press MENU for OTHERS menu.>
Figure 5-1 Self test screen
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 results
appear only when optional ARP-10 board is
mounted.
5. To check the keyboard, press any key ex-
cept the omnipad, ACQ and power keys. Its
corresponding location on the display lights
in black if the key is operating properly.
6. Press the [ACQ] key to check the display
circuit. The following pattern should appear.
Figure 5-2 Test pattern
24
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6. INSTALLATION
¡The compass safe distance should be ob-
served to prevent deviation of the magnetic
compass.
This chapter provides the procedures neces-
sary for installation. Installation mainly con-
sists of the following:
¡siting and mounting the display unit and
Model Standard compass
Steering compass
0.7 m
antenna unit
1832
1932
1942
0.9 m
1.1 m
1.0 m
0.8 m
0.74 m
¡connection of the signal cable and the
power cable
¡establishing the ground
¡checking the installation, and
¡adjustments.
¡Do not paint the radome (Model 1832) or
radiator aperture (Model 1932, 1942), to
ensure proper emission of the radar waves.
¡When this radar is to be installed on larger
vessels, consider the following points:
6.1 Antenna Unit Installation
(1) The signal cable run between the an-
tenna and the display comes in lengths
of 10 m, 15 m, 20 m and 30 m. What-
ever length is used it must be unbro-
ken; namely, no splicing allowed.
Siting, handling considerations
¡ The antenna unit is generally installed either
on top of the wheelhouse or on the radar mast
on a suitable platform. Locate the antenna
unit where there is a good all-round view
rigging intercepting the scanning beam.Any
obstruction will cause shadow and blind
sectors. Amast for instance, with a diameter
considerably less than the width of the
radicator, will cause only a small blind sec-
tor, but a horizontal spreader or crosstrees in
the same horizontal plane as the antenna unit
would be a much more serious obstruction;
you would need to place the antenna unit well
above or below it.
(2) Deposits and fumes from a funnel or
other exhaust vent can adversely affect
the aerial performance and hot gases
may distort the radiator portion. The
antenna unit must not be mounted
where the temperature is more than
70°C.
Mounting (Model 1832)
¡ It is rarely possible to place the antenna unit
where a completely clear view in all direction
is available. Thus, you should determine the
angular width and relative bearing of any
shadow sectors for their influence on the
radar at the first opportunity after fitting.
(The method of determining blind and
shadow sectors appears later in this chapter.)
¡ If you have a radio direction finder on your
boat, local its antenna clear of the antenna
unit, to prevent interference to the direction
finder.Aseparation of more than two meters
is recommended.
Figure 6-1 Typical antenna unit location
Unpacking the antenna unit
1. Open the antenna unit packing box care-
fully.
¡To lessen the chance of picking up electri-
cal interference, avoid where possible rout-
ing the signal cable near other onboard
electrical equipment. Also avoid running
the cable in parallel with power cables.
2. Unbolt the four bolts at the base of the ra-
dome to remove the radome cover.
25
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SHIP'S BOW
Radome cover
CABLE
ENTRY
Figure 6-2 Antenna unit
4-Ø12 HOLES
Mounting platform
Holes for antenna unit:
FLAT WASHER
SPRING WASHER
M10 X 25 HEX BOLT
The mounting surface must be parallel with
the waterline and provided with five holes
whose dimensions are shown in the outline
drawing attached at the end of this manual.
PLATFORM
Antenna base plate
The unit is adjusted so a target echo returned
from the bow direction will be shown on the
zero degree (heading line) position on the
screen. When drilling holes, be sure they are
parallel with the fore and aft line.
Effective
thread length
Packing
Radome
25 mm
5 - 10 mm
Platform
Flat
washer
3. Prepare a platform of 5 to 10 millimeters
in thickness for the antenna unit. (A mount-
ing bracket for mounting the antenna unit
on a sailboat mast is optionally available.
See the below for details.) Find the cable
entry on the radome base. Next, position
the radome base so the cable entry faces
the stern direction. This alignment must be
as accurate as possible. Fasten the radome
base to the mounting platform with four
each of M10 x 25 hex bolts, flat washers
and spring washers.
Spring
washer
Apply silicone sealant
M10 x 25
Hex bolt
Figure 6-4 How to fasten the radome base
to the mounting platform
Wiring and final preparation
4. Drill a hole of at least 20 millimeters di-
ameter through the deck or bulkhead to run
the signal cable between the antenna unit
and the display unit. (To prevent electrical
interference avoid running the signal cable
near other electrical equipment and in par-
allel with power cables.) Pass the cable
through the hole. Then, seal the hole with
sealing compound for waterproofing.
Mask size;
φ70 to φ125 mm
5. Remove the shield cover in the radome.
Type: OP03-92
Code no.: 008-445-070
Figure 6-3 Assembling the sailboat mast
mounting bracket (option)
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6. Remove the cable clamping plate by un-
fastening four screws and removing a gas-
ket.
10. Attach the EMC core supplied as shown
below.
J801
Pan head screws
M4x8 4 pcs.
MD9208
J806
J802
J805
J804
Cable clamping plate
Shield cover
J803
Cable
entrance
Cable
clamping
plate
Pan head
Gasket
screws
M4x8 7 pcs.
Shield cover
Motor
Pan head
screws
M4x8 7 pcs.
EMC core
E04SS251512
(Above cable
clamping
plate)
J1
J613
J611
PTU-9335
Figure 6-5 Antenna unit, inside view
IF9214
7. Pass the cable through the hole at the bot-
tom of the radome base.
8. Secure the cable with the cable clamping
plate and gasket. Ground the shield and
vinyl wire by one of the screws of the cable
clamping plate.
Figure 6-8 How to attach EMC core
11. Fix the shield cover. Do not pinch the
cable.
12. Attach the radome cover, aligning triangle
mark on radome cover with that on ra-
dome base.
9. Connect the wire to the RF unit.
to one of the screws
of the cable clamping plate
Radome cover
9-pin connector:
to J801 on MD-9208
Radome base
4-pin connector:
to J802 on MD-9208
Figure 6-9 How to position the radome
cover
13-pin connector:
to J611 on IF-9214
13. Loosely fasten the radome fixing bolts.
You will tighten them after confirming
magnetron heater voltage.
Figure 6-6 Signal cable, antenna unit side
J802
J801
MD-9208
Cable
entry
Mounting (Model 1932, 1942)
PTU-9335
Figure 6-10 Typical antenna unit mounting
locations
J611
IF-9214
1. Drill four fixing bolt holes (13 millimeters
dia.), one cable entry hole (approx. 50 mil-
limeters dia.) in the mounting platform. See
the outline drawing.
Figure 6-7 RF unit
27
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2. Detach the antenna housing cover from the
antenna housing by loosening four fixing
bolts. The antenna housing cover fitted with
the transceiver module can be stored in a
convenient place until the wiring to the an-
tenna unit is done.
Connections
Only the signal cable runs from the display
unit to the antenna unit. Make the hole for
passing the cable through the bulkhead or deck
at least 20 millimeters diameter. In order to
minimize the chance of picking up electrical
interference, avoid where possible routing the
signal cable near other onboard electrical
equipment. Also, avoid running the cable in
parallel with power cables. Pass the cable
through the hole and apply sealing compound
around the hole for waterproofing.
3. Place the antenna housing on the mount-
ing platform and orient it as shown in Fig-
ure 6-11.
The procedure for connecting the signal cable
to the antenna unit is as following.
Ship's
bow
Ship's
bow
1. Through a pipe or waterproof cable grand
fitted on the wheelhouse top or bulkhead.
Figure 6-11 How to orient the antenna unit
4. Insert four M12 x 60 hex head bolts with
the seal washers from inside the antenna
housing, to prevent the bolts from contact-
ing the transceiver module. Install the seal
washer with the larger diameter next to the
head of the bolt. Coat flat and spring wash-
ers and nuts and then use them to fasten
the antenna housing to the mounting plat-
form. Finally, coat exposed parts of nuts,
bolts and flat and spring washers as shown
in Figure 6-12.
2. Unfasten four screws at bottom of the scan-
ner base to remove the cable gland assem-
bly.
3. Pass the signal cable through the antenna
base and the cable gland assembly (re-
moved in step 2.)
4-M4x10
CLAMP PLATE
PACKING
FLAT
WASHER
Note: Tighten the bolts by their nuts to pre-
vent damage to the seal washer. Do not turn
the bolts to secure the antenna housing.
Figure 6-13 Passing the signal cable
through the antenna housing
Hex head bolt
(M12 x 60)
Seal washer
4. Fasten the cable gland assembly.
5. Connect the lead wires to RTB-9100 in the
antenna housing by referring to the Inter-
connection Diagram. Fasten the ground
washer at the bottom of the antenna hous-
ing as shown in Figure 6-13.
Scanner
housing
Silicone
sealant
Flat washer
Spring washer
Hex head nut
Figure 6-12 How to mount the antenna
housing
GROUND WIRE
Fasten
shield here.
RTB-9100
Figure 6-14 Connection in the antenna
housing
28
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Final preparation
Scanner
radiator
Apply silicone sealant
into threaded holes.
O-ring
1. Place the antenna housing cover on the
housing. Loosely fasten the four fixing
bolts on the cover.
Radiator bracket
Flat washer
Scanner housing
Spring washer
Hex head bolt
(M8 x 30)
ing
es
Coat bolts with
silicone sealant.
Note: Apply anticorrosive sealant
to hached areas, antenna bracket
for XN12A type radiator.
Figure 6-18 Fastening the radiator to the
radiator bracket
Figure 6-15 Fastening the antenna
housing cover
4. Open the antenna housing cover and fix the
stay as shown in Figure 6-19.
2. Apply grease to the two slot pins. Using a
wooden hammer to prevent damage to
paint, insert slotted pins into the pinning
holes until the pin head is flush with the
scanner housing surface.
5. One end of the cable with 15-, 9- and 7-
way plugs has already been connected to
RTB-9100 inside the scanner housing.
Mate the 15- and 9-way plugs with jacks
J812 and J811 on the transceiver module,
respectively. Connect the 7-way plug to
jack J701 on the MP Board. Secure the
cable between RTB-9100 and J701 with the
cable tie as shown in Figure 6-19.
Radiator
Face in
stern direction.
Ship’s
bow
Cable
tie
MP Board
Figure 6-16 How to insert slot pins
J812
Fasten ground
wire here.
J811
Stay
3. Now is the time to fix the radiator to the
radiator bracket. Apply anticorrosive seal-
ant (silicone sealant) to hatched areas, to
prevent corrosion. See the figure below.
Apply silicone sealant into threaded holes
on the scanner radiator. Remove the cap
on the radiator bracket and orient the ra-
diator bracket as shown in Figure 6-13.
Apply grease to the O-ring and set it to the
center of the radiator bracket. Coat the ra-
diator fixing bolts with silicone sealant.
Fasten the radiator to the radiator bracket
with the FURUNO logo on the radiator fac-
ing ship’s bow.
Figure 6-19 Antenna unit, cover opened
6. Fasten the ground wire (black) of the sig-
nal cable to the chassis as shown in Figure
6-19.
7. Loosely fasten the antenna housing cover.
You will tighten the fixing bolts after con-
firming magnetron heater voltage.
Groove
Waveguide
Note: Apply anticorrosive
sealant to hatched areas,
antenna radiator bottom
view of XN8 type radiator.
Figure 6-17 How to coat radiator with
silicone sealant for XN8 type radiator
29
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Mounting
6.2 Display Unit Installation
The display unit is designed to be mounted
on a tabletop or bulkhead.
Mounting considerations
When selecting a mounting location for the
display unit keep in mind the following points.
1. Using the hangar as a template, mark screw
locations in the mounting location.
¡Even though the display unit is waterproof,
it is recommended that the display unit
must be mounted inside an enclosed cabi-
net.
2. Fix the hanger to the mounting location
with five M6 tapping screws (supplied).
3. Fit the knob bolts to the display unit. In-
stall the display unit in the hunger. Tighten
the knob bolts securely.
¡Provide adequate space behind and around
the unit to permit circulation of air and to
provide convenient access to the rear con-
nectors.
Connections
1. Connect the power cable to the power cable
connector on the rear of the display unit.
¡Even though the picture is quite legible
even in bright sunlight, keep the display
unit out of direct sunlight or at least shaded
because of heat that can build up inside the
cabinet.
2. Connect the signal cable to connector DJ-
1 on the rear of the display unit.
3. Run a ground wire (local supply) between
the ground terminal on the rear of the dis-
play unit and the ship’s superstructure.
¡Locate the display unit in a position where
you can view and operate it conveniently
but where there is no danger of salt or fresh
water spray or immersion.
Navigation aid, video sounder con-
nection
¡The orientation of the display unit should
be so the radar screen is viewed while the
operator is facing in the direction of the
bow. This makes determination of your
position much easier.
If your navigation aid can output data in
IEC1162(NMEA 0183) data format, your
vessel's position in latitude and longitude, the
range and bearing to waypoint, speed and
course may be input to this radar, and be seen
on the screen.
¡Make sure you allow enough clearance
both to get to the connectors behind the unit
and to allow you to get your hands in on
both sides to loosen or tighten the mount-
ing knobs. Make sure you leave at least a
foot or so of “service loop” of cables be-
hind the unit so it can be pulled forward
for servicing or easy removal of the con-
nectors.
Further if your video sounder can output depth
in IEC1162 (NMEA 0183) data format, depth
can be displayed on the radar screen.
You will need an NMEA cable:
Type
Code no.
Remarks
MJ-A6SPF0012-050 000-134-424 6P-6P (5m)
MJ-A6SPF0012-100 000-133-817 6P-6P (10m)
MJ-A6SPF0003-050 000-117-603 w/connector
MJ-A6SPF0009-100 000-125-236 w/connector
¡The compass safe distance of 0.8 meters
(standard compass) and 0.6 meters (steer-
ing compass) should be observed to pre-
vent deviation of the magnetic compass.
This radar can output NAVdata received from
a navaid to an echosounder.
¡ Even though the display unit meets water-
proof standard IPX-5, the connection of ex-
ternal buzzer, radar plotter and/or remote
display can affect waterproofness. Water-
tight integrity cannot be guaranteed. When
these modification has been done, the dis-
play unit should not be mounted where ex-
posed.
J1352 (NMEA)
SPU9211
INT9213
Navaid
(TLL)
Echo-
sounder
J1354
1832/1932/1942
30
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Heading Sensor Connection
Heading signal can be connected to the
“HDG” connector.
Type
Code no.
Remarks
MJ-A6SPF0007-100 000-125-237 6P-6P 10m
MJ-A6SPF0009-100 000-125-236 w/connector(10m)
MJ-A6SPF0003-050 000-117-603 w/connector(5m)
Input/Output Data List
Connector
Name
Model
Data
Pin In/Out
FCV561M2 J1
183 (1.5)
4
4
4
6
6
4
6
6
4
4
6
6
6
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
FCV581
FCV582
FCV291
FCV292
FCV668
GP1810
NMEA
NMEA
183 (1.5)
183 (1.5)
NMEA
NMEA
NMEA
IN/OUT
183 (1.5/2.0)
183 (1.5/2.0)
183 (1.5)
183 (1.5/2.0)
183 (1.5)
GP3100M2 IN/OUT
GP8000M2 NMEA
PS8000M2 NMEA
183 (1.5/2.0)
183 (1.5/2.0)
183 (1.5/2.0)
183 (1.5/2.0)
183 (1.5/2.0)
GP80
GP80
DATA1
DATA2
GP1800M2 IN/OUT
Note: All plotter in the table except the GP-
1800M2 can receive TLL data.
31
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CAUTION
Replace the fuses to
5 A for 24/32 VDC set.
Power cable connector
External equipment
connector
(To be used for Remote
Display, External Alarm
Buzzer, OP03-21 and
Radar Plotter, RP-110)
Signal cable connector
(DJ-1, waterproof)
Ground terminal
Left: HDG connector
Mid: NMEA connector (for NAV)
Right:NMEA connector (for E/S)
CAUTION
Ground the equipment. Ungrounded
equipment can give off or receive
electro-magnetic interference or give
electrical shock.
Figure 6-20 Connections on the display unit
6.5 Adjustments
6.3 Exchange of Fuse for
24/32V Power Supply
This section covers adjustment of the radar
after installation. You will need to
The power cable comes with a 10A fuse in
the fuse holder. This fuse is for use with a
12V DC power supply. For 24V/32V DC
power supply, replace the fuse with the 5A
fuse (supplied) and attach 5A label (supplied)
to fuse holder.
¡ adjust tune/video amplifier level input
¡ enter antenna height
¡ align heading
¡ adjust sweep timing
6.4 Checking the Installation
¡ adjust main bang suppression
¡ setting a blanking area, and
¡ confirm magnetron heater voltage.
After completing the installation, it is a good
idea to recheck it to be sure all steps were
correctly done. Use the table 6-1 to check the
installation.
These adjustments are done through the radar
install menus.
Tick box
Preparation
The signal cable is securely retained
against the mast or mounting platform and
is free of interference from running rigging.
1. Turn off the radar. While pressing and hold-
ing down the [GAIN] control (at least three
seconds), press the [POWER] key.
The cable gland or entry on the deck, if
provided, is waterproofed.
2. Press the [MENU] key, and select “OTH-
ERS” by using the omnipad, and pressing
[ACQ/ENTER] key.
The power connections to the battery are
of correct polarity.
3. Select “24. Installation setup”.
The plugs at the rear of the display unit
are tightly fastened.
4. Press the [ACQ/ENTER] key to open the
installation setup menu.
The fuse in the power cable is 10A (12V)
or 5A (24V/32V DC).
32
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Entering antenna height
[ Installation Setup ]
Select item by omnipad
and ress ENTER key.
The STC curve changes with respect to an-
tenna height above the waterline. Enter an-
tenna height above the waterline to optimize
the STC curve.
LC
ft
All
m
GPS
¡. Nav Talker
2 . Depth Unit
3 . Temp Unit
4 . Hdg Sensor
5 . Key Beep
fa
˚C
˚F
Magnet
Off
Gyro
On
Stop
1. Select “12. Antenna Height” on the instal-
lation setup menu and press the [ACQ/EN-
TER] key.
Rotate
180˚~180˚
Auto Adjustment
6 . Ant on Tx
7 . Dead Sector
8 . Tuned/Video
9 . Heading Alignment
10. Sweep Timing
2. Operate the omnipad to select antenna
height above the waterline; Low (~3 m),
Mid (3~6 m) or High (6~10 m).
Adjustment
11. MBS Adjustment
12. Ant Height
13. STC Curve
14. Ope Mode
15. Hours in Use
16. Tx Hours
Low
Mid
Hig
Sharp
Master
Gntl
Std
3. Press the [ACQ/ENTER] key.
Slave
000001.5H
000000.0H
Aligning heading
(Adjustment sector:0~359.90)
Figure 6-21 Installation setup menu
You have mounted the antenna unit facing
straight ahead in the direction of the bow.
Therefore, a small but conspicuous target dead
ahead visually should appear on the heading
line (zero degrees).
Adjusting tune/video
Do the following to adjust tune and video am-
plifier level input.
In practice, you will probably observe some
small error on the display because of the dif-
ficulty in achieving accurate initial position-
ing of the antenna unit. The following
adjustment will compensate for this error.
1. Press the [ST BY/TX] key to transmit.
WARNING
1. Identify a suitable target (for example, ship
or buoy) at a range between 0.125 to 0.25
nautical miles, preferably near the head-
ing mark. To lessen error, keep echoes in
the outer half of the picture by changing
the range. Also, be sure the zoom and off
center functions are off.
Before transmitting the radar make sure
no one is near the antenna unit, to pre-
vent the potential risk of being struck
by the rotating antenna and exposure
to RF radiation hazard.
2. On the Installation setup menu, select “8.
Tune/Video Adjustment” and press the
[ACQ/ENTER] key.
2. Select “9. Heading Alignment” on the in-
stallation setup menu and press the [ACQ/
ENTER] key. The following message ap-
pears on the display.
3. The unit automatically adjusts, displaying
the following message.
[ Heading alignment ]
Set EBL1 to center of target
dead ahead and press ENTER.
[ Tune/Video Auto Adjustment ]
Now under correction.
Correction 0.0°
Return to illustration setup.
menu after the correction.
<Press MENU for inst setup>
Figure 6-22 Tune/Video Auto
Adjustment messages
Figure 6-23 Heading alignment message
3. Operate the omnipad to bisect target se-
lected at step 1 with the heading line.
4. When adjustment is completed, the mes-
sages disappears.
4. Press the [ACQ/ENTER] key.
33
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5. As a final test, move the boat towards a
small buoy and confirm that the buoy
shows up dead ahead on the radar when it
is visually dead ahead.
[ Sweep Timing Adjustment ]
Use omnipad to straighten
target and press ENTER key.
Correction 0.000 nm
Adjusting sweep timing
<Press MENU for inst setup>
(Adjustment range:0.000~4.266nm)
Figure 6-25 Sweep timing adjustment
message
This adjustment ensures proper radar perfor-
mance, especially on short ranges. The radar
measures the time required for a transmitted
echo to travel to the target and return to the
source. The received echo appears on the dis-
play based on this time. Thus, at the instant
the transmitter is fired, the sweep should start
from the center of the display (sometimes
called sweep origin.)
4. Operate the omnipad to straighten the tar-
get selected at step 2, and then press the
[ACQ/ENTER] key.
Adjusting MBS
(Adjustment: 0.00~0.25)
Main bang (black hole), which appears at the
display center on short ranges, can be sup-
pressed as follows.
A trigger pulse generated in the display unit
goes to the antenna unit through the signal
cable to trigger the transmitter (magnetron).
The time taken by the signal to travel up to
the antenna unit varies, depending largely on
the length of signal cable. During this period
the display unit should wait before starting
the sweep. When the display unit is not ad-
justed correctly, the echoes from a straight
local object (for example, a harbor wall or
straight pier) will not appear with straight
edges - namely, they will be seen as “pushed
out” or “pulled in” near the picture center. The
range of objects will also be incorrectly
shown.
1. Transmit on long range about 10 minutes.
2. Adjust the gain to show a small amount of
noise on the display.
3. Change to the 0.125 nautical mile range
and adjust the [A/C SEA] control.
4. Select “11. MBS adjustment” on the instal-
lation setup menu.
5. Press the [ACQ/ENTER] key. The follow-
ing message appears.
[ MBS Adjustment ]
Set value by omnipad
and press ENTER key.
Correction 000
<Press MENU for inst setup>
(1) Correct
(2) Target pushed
inward
(3) Target pushed
outward
Figure 6-26 MBS Adjustment message
6. Operate the omnipad to suppress main
bang. (left: low, right: high, between 0 and
25)
Figure 6-24 Examples of improper and
correct sweep timing
1. Transmit on the shortest range and confirm
that the [GAIN] and [A/C SEA] controls
are properly adjusted.
7. Press the [ACQ/ENTER] key.
2. Visually select a target which forms straight
line (harbor wall, straight pier).
3. Select “10. Sweep Timing Adjustment” on
the installation setup menu and press the
[ACQ/ENTER] key. The message appears.
34
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Setting a blanking area
Magnetron heater voltage
When the antenna is installed at a close dis-
tance in front of the wheelhouse, the radar
should be set not to transmit within that area.
No echoes appear in the blanking areas.
Magnetron heater voltage is formed at the MD
Board of the antenna unit and preadjusted at
the factory for use with any length of signal
cable. Therefore no adjustment is required.
However, verify heater voltage by following
the procedure below.
1. Select "7. Dead Sector".
2. Press the [ENTER] key.
1. Turn on the radar (if it is not already on)
and set it in stand-by.
3. Operate the omnipad to enter starting point
of area (in figures).
2. Open the antenna housing (radome) cover.
Connect a multitester, set to 10 VDC range.
4. Press the [ENTER] key.
5. Operate the omnipad to enter ending point
of area (in figures).
Model
M1832
M1932
Check Point
Rating
Adjustment
point
6. Press the [ENTER] key.
TP802 #4, #6 on
PTU Board
7.4~7.6V
7.4~7.6V
R106
TP803 #4, #6 on
MD Board
VR801
M1942
TP803 #4, #6 on
MD Board
7.5~7.7V
VR801
3. Close the antenna housing cover and tighten
the fixing bolts.
Area of no
transmission
Figure 6-27 Blank areas where
transmission is suspended
This area can be turned on/off on the OTHER
MENU. For detail, see the description on page
18.
Note: This setting should be done after other
adjustments are finished.
35
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MENU TREE
MENU KEY
RINGS (Off, 1, 2, 3, max)
EBL OFFSET (Off, On)
SHIFT (Off, On)
ZOOM (Off, On)
MODE (HU, CU, NU, TM)
DISP DATA
ECHO TRAIL (Off, On)
ECHO STRTCH (Off, ES1, ES2)
ARP-10 MENU
1. Display
2. All Cancel
3. Vector ref
4. Vector Length
5. History
6. CPA SET
7. TCPA SET
8. AUTO ACQ
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
1.
2.
3.
4.
5.
6.
7.
8.
9.
(15S, 30S, 1M, 3M, 6M, 15M, 30M, Cont)
Tone (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) :1832
36, 48) :1932
36, 48, 64) :1942
(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
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
AP-1
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ARP-10 (OPTION)
NOTICE
WARNING
Hazardous voltage can
shock, burn, or cause death.
The installation must be done by a
FURUNO representative or suitably
qualified radar technician.
Only qualified personnel should
work in the unit.
Authorities require this.
This auto plotter is not designed to
replace the human eye nor make
decisions for the navigator. It is
intended for use as an aid to navigation.
Always maintain a watch while
underway. Data obtained from this auto
plotter should always be double checked
against other sources to verify the
reliability of the data.
Keep magnets and magnetic fields
away from the equipment.
Magnetic fields will distort the picture and
can cause equipment malfunction. Be sure
the unit is well away from equipment
which gives off magnetic fields
(speaker, power transformer, etc.).
The following items affect calculation
accuracy.
This auto plotter automatically tracks a
acquired radar target and calculates its
course and speed, indicating it by a vector.
Since the data generated by this unit are
based on what radar targets are selected,
the radar must always be optimally tuned
for use with it to ensure that required
targets will not be lost or unwanted targets
such as sea returns and noise will not be
acquired and tracked.
• echo intensity
• radar transmission pulsewidth
• radar bearing error
• gyrocompass error
• own vessel or other vessel course
change
Data for CPA, TCPA, etc. are
approximations only. Always use data
obtained prudently.
A target echo does not always mean a
landmass, reef, ships or other surface
objects but can imply returns from sea
surface or precipitation. As the level of
these returns varies with environment, the
operator is required to properly adjust the
STC (ant-clutter sea), FTC (anti-clutter rain)
and GAIN controls to ensure that target
echoes within the affected area are not
eliminated from the radar screen. The
optimum settings of these controls may
slightly differ between the normal radar
operation and plotting, and it is
recommended to readjust them in
accordance with the operating mode
selected.
AP-2
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Keys Used for Auto Plotter
Operation of ARP-10
The Auto plotter utilizes the following
touchpad keys. Given below is a brief descrip-
tion of these keys.
General
The Auto Plotter ARP-10 is an optional cir-
cuit board which is accommodated in the dis-
play unit of the MODEL 1832, 1932 and 1942
radars.
MENU:
Displays/Erases the main menu.
SELECT/CANCEL:
(Long press) Terminates plotting 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 speeds and
courses and displays the results in alphanu-
meric and by vectors. To ensure the reliabil-
ity of the displayed target data, the radar must
be properly adjusted for minimum sea returns
and noise.
(Brief press) Displays the data of target se-
lected with the cursor.
ACQ/ENTER: Acquires the target selected
with the cursor.
ARP-10 MENU Operation
The ARP-10 MENU operation includes the
followings;
Principal Specifications
Acquisition and tracking:
Display: Turns on/off the plot symbols, past
positions and target data.
• Acquisition of up to 10 targets between 0.2
and 16 nm.
All Cancel:
Cancels the tracking of all
targets.
• Automatic tracking of up to 10 acquired
targets between 0.1 and 16 nm.
Vector Ref:
Selects relative vector or
true vectors. To select your choice, open the
ARP-10 menu, and the legend Rel and True
appear on the "3. Vector Ref" line. Operate
the omnipad. When your selection is in the
reverse video, press the [ACQ/ENTER] key.
Vectors:
Vector length; 30 s, 1, 3, 6, 15, 30 min.
Orientation; True velocity or relative
velocity
Past positions: 5 past positions at intervals
of 15, 30 s, 1, 2, 3, 6 min.
Vector Length: Selects vector time.
History: Selects past position plot interval.
Alarm:
Visual and audible alarms against
targets violating CPA/TCPA
limits, Visual alarm against lost
targets
CPA Set: Selects CPA alarm limit. When a
target is predicted to come within this limit,
an aural alarm sounds and at the same time
the corresponding target symbol changes to a
blinking triangle.
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 targets.
Note:If the preset CPA limit is set at OFF, a
target which is on collision course will not
produce an alarm.
TCPA Set: Selects TCPA alarm limit.
Auto ACQ: Turns on/off Auto Acquisition
Area.
AP-3
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Activating the Auto plotter
[ ARP MENU ]
Select item by omnipad
and press ENTER key.
To activate the Auto Plotter, follow the steps
shown below:
¡. Display
Off
On
2 . All Cancel
3 . Vector Ref
4 . Vector Length
1. Adjust the GAIN,A/C SEAandA/C RAIN
controls for proper radar picture.
Rel
True
30S 1M
15M 30M
3M 6M
2. Press the [MENU] key to open the main
menu.
5 . History
Off 15S 30SLo 1M
2M 3M Of6f M
6 . CPA Set
7 . TCPA Set
8 . Auto ACQ
Off 0.5 1nm 2nm
3nm 5nm
3. Operate the omnipad to select "ARP-10
MENU".
6nm
30S 1M 2M
3M
4M
Off
5M 6M
On
12M
4. Press the [ACQ/ENTER] key. The menu
shown in Figure AP-1 appears.
Figure AP-1 ARP Menu
5. Operate the omnipad to select the menu
item "1. Display".
6. Operate the omnipad to select "On".
7. Press the [ACQ/ENTER] key.
8. Press the [MENU] key to close the menu.
Target under auto tracking but not
selected for cursor data reading
AUTO
TRAIL
HDG 234.5°
25:38
30M
8
2 NM
G (OUT)
ZOOM
ES1
AUTO TARGET
Target Full
Mark
FULL
SP
HU
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
TRUE VECTOR
15 MIN
SPEED 12.5 KT
RANGE 5.36 NM
ARP Data Area
TCPA
12:35
CPA
2 NM
Figure AP-2 ARP Display
AP-4
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Deactivating the Auto Plotter
To deactivate the Auto Plotter,
1. Open the "ARP-10 MENU".
LARGE CIRCLE
The plot symbol of a target under tracking
becomes twice as large as the normal symbol
when the target is selected for data reading.
2. Operate the omnipad to select the "1. Dis-
play".
5. Operate the omnipad to select "Off".
6. Press the [ACQ/ENTER] key.
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 successful
acquisition.
7. Press the [MENU] key to close the menu.
Note 2:When you want to acquire 11th target,
cancel tracking one of less important targets.
Acquiring targets
Note 3:When auto acquisition mode (Auto
ACQ) is on, up to 5 targets can be acquired.
For detail, see next section titled Automatic
Acquisition.
Manual Acquisition
Follow the steps below to manually acquire a
target. Up to 10 targets can be manually ac-
quired.
1. Place the cursor (+) on a target of interest
by operating the omnipad.
WARNING
When a tracked target nears another
tracked target, the targets may be
2. Press the [ACQ/ENTER] key.
The plot symbol changes its shape according
to the status as below. A vector appears in
about one minute after acquisition indicating
the target's motion trend. If the target is con-
sistently detected for three minutes, the plot
symbol changes to a solid mark. If acquisi-
tion fails, the target symbol blinks and disap-
pears shortly.
"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.
Automatic Acquisition
The Auto plotter ARP-10 can acquire up to 5
targets automatically by setting the Auto Ac-
quisition area predefined in the system. IfAuto
ACQ is selected after more than 5 targets have
been manually acquired, only the remaining
capacity of targets can be automatically ac-
quired. Example; when 7 targets acquired
manually, then the Auto ACQ is switched on
only 3 targets can be acquire automatically.
When five targets have been automatically
acquired, "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 45º on either side
of the heading line in bearing. If a target come
into this area, it is acquired automatically.
AP-5
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To turn ARP data on;
1. Press the [MENU] key.
2. Select the "DISP DATA".
3. Press the [ACQ/ENTER] key to select the
message for "ARP" or "NAV and ARP ".
Figure AP-4 Auto acquisition area
4. Press the [ACQ/ENTER] key to set.
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".
CAUTION
At the speed under 5 kts the target data is
displayed with a delay because of
filtration.
2. Select "8. Auto ACQ" by operating the
omnipad.
3. Operate the omnipad to 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 follows;
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
suffix "M" is used in case of magnetic com-
pass 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 com-
pass input.
All Targets
All targets can be canceled from "ARP-10
MENU" at a time.
1. Open the "ARP-10 MENU".
2. Select "2. All Cancel".
CPA (Closest Point of Approach) is the clos-
est range a target will approach to own ship.
Do not mix it with the operator preset CPA
alarm limit.
3. Press the [ACQ/ENTER] key.
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.
AP-6
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TCPA is 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.
CPA/TCPA Alarm
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.
TheAuto plotterARP-10 continuously moni-
tors the predicted range at the Closest Point
ofApproach (CPA) and predicted time to CPA
(TCPA) of each tracked target to own ship.
Mode and length of Vectors
When the predicted CPA of any target be-
comes smaller than a preset CPA alarm 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.
True or Relative Vector
Target vectors are displayed in relative or true
mode. Own ship does not have a vector in rela-
tive mode.
Vector Length
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.
From the ARP-10 MENU, Vector Length can
be set to 30 seconds, 1, 3, 6, 15 or 30 minutes
and the selected vector time is indicated on
the screen.
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.
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.
Past position Display
TheAuto Plotter displays equally time-spaced
dots (maximum 5 dots) marking the past po-
sitions of any targets being tracked.
WARNING
The CPA/TCPA alarm feature should
never be relied upon as a sole means for
detecting the risk of collision.
If a target changes its speed, the spacing will
be uneven. If it changes the course, its plotted
course will not be a straight line in TM mode.
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.
Operational Warnings
There are two main situations which cause the
Auto plotter to trigger visual and audible
alarms.
Follow the steps shown below to set the CPA/
TCPA alarm ranges:
1. Open the "ARP-10 MENU".
• CPA/TCPA alarm
• Lost target alarm
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.
AP-7
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4. On the "TCPASet" line, select a TCPAlimit
desired. (30s, 1, 2, 3, 4, 5, 6, 12M)
2. Attach theARP-10 Board to the right-hand
chassis of the display unit, using the spacer
supplied as follows.
5. Press the [ACQ/ENTER] key.
6. Press the [MENU] key to close the menu.
1) Fasten three spacers tightly.
The flashing of the triangle plot symbol and
vector remain on the screen until the danger-
ous situation is no longer present or you in-
tentionally terminate tracking of the target by
using the [SELECT/CANCEL] key.
2) Attach the P107 connector on ARP-
10
Board to J107 connector on
SPU Board.
3) Tighten three pan head screws to fix the
ARP-10 Board.
Lost Target Alarm
Front
When the system detects a loss of a tracked
target, the target symbol becomes a flashing
diamond.
$
Spring Washer
M3 3pcs.
Spacer
SQ-20 3pcs.
$
Installation of ARP-10
Pan Head
Screw
M3 x 8 3pcs.
Necessary Parts
P107
J107
ARP-10 (000-086-852)
Name
ARP-10 Board
Spacer
Type
18P9007
Code No. Qty
008-476-930
1
ARP-10 Board
18P9007
SPU Board
SPU9211
SQ-20
000-801-650
000-864-204
3
3
3
M3 C5191W
Spring Washer
$: Pull the front panel slightly to fix these screws.
M3x8 C2700W 000-881-404
3x8 SWRM10 000-805-774
Pan Head Screw
Pan Head Screw
(w/washer) *
3
Input Signal Check
* Not used.
Place the radar in transmit condition after con-
necting the speed and heading sensor. Make
sure the following items are OK on Self Test
menu.
Mounting (For technician only)
1. Remove the cover from the display unit as
follows.
• SPEED
1 Unscrew four binding screws (M4 x
10).
• COURSE
• TRIGGER
2 Unfasten six binding screws (M3 x
10).
Video Signal Check
3 Remove three rubber covers to loosen
three hex nuts.
Make sure the follows on Self Test menu.
• VIDEO : OK
4 Loosen two hex nuts.
1
1
• Adjust GAIN, A/C SEAand A/C RAIN so
that the readout for FE-DATA 1 and 2 are
less than 1,000.
2
2
4
AP-8
1
3
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