Furuno FR-2125V User Manual 2
MARINE RADAR
MODEL
FR-2125V
(
C
9-52, Ashihara-cho,
Nishinomiya, Japan
Telephone: 0798-65-2111
Telefax: 0798-65-4200
All rights reserved.
Printed in Japan
Your Local Agent/Dealer
FIRST EDITION : APR. 1999
G : AUG. 8, 2001
PUB. No. OME-34710
YOSH)
FR-2125V
SAFETY INSTRUCTIONS
WARNING
Radio Frequency Radiation Hazard
The radar antenna emits electromagnetic radio frequency (RF) energy which can be
harmful, particularly to your eyes. Never look directly into the antenna aperture from a
close distance while the radar is in operation or expose yourself to the transmitting
antenna at a close distance.
2
Distances at which RF radiation levels of 100 and 10 W/m
below.
Note: If the antenna unit is installed at a close distance in front of the wheel house,
your administration may require halt of transmission within a certain sector of antenna
revolution. This is possible Ask your FURUNO representative or dealer to provide
this feature.
exist are given in the table
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WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Wear a safety belt and hard
hat when working on the
antenna unit.
Serious injury or death can
result if someone falls from
the radar antenna mast.
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WARNING
Turn off the radar power
switch before servicing the
antenna unit. Post a warning sign near the switch
indicating it should not be
turned on while the antenna
unit is being serviced.
Prevent the potential risk of
being struck by the rotating
antenna and exposure to
RF radiation hazard.
i
WARNING
WARNING
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Turn off the power immediately if water
leaks into the equipment or the equipment is emitting smoke or fire.
Continued use of the equipment can cause
fire or electrical shock.
Use the proper fuse.
Fuse rating is shown on the equipment.
Use of a wrong fuse can result in equipment damage.
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.
Do not operate the equipment with wet
hands.
Electrical shock can result.
Keep heater away from equipment.
Heat can alter equipment shape and melt
the power cord, which can cause fire or
electrical shock.
Danger/Warning Labels in Display Unit
This display unit contains the danger/warning labels shown below. Do not remove the
labels. If a label is peeling off or is illegible, contact a FURUNO agent for replacement.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
Name: Warning Label
Type: 86-003-1011
Code No.: 100-236-230
DANGER
Electrical shock hazard.
Do not touch parts inside
this cover.
Name: Warning Label
Type: 03-144-1332
Code No.: 100-266-290
WARNING
Display unit may fall.
Lock stay before
servicing.
DANGER
Electrical shock hazard.
Do not touch anode cap
or its cable.
WARNING
Possibility of injury.
Hold handle when
mounting display unit.
Name: Warning Label
Type: 03-144-1333
Code No.: 100-266-300
DANGER
Electrical shock hazard.
Turn off power before
servicing.
Name: Danger Label
Type: 14-055-4202
Code No.: 100-245-220
Name: Danger Label
Type: 14-055-4201
Code No.: 100-243-450
ii
Name: Danger Label
Type: 66-022-2012
Code No.: 100-237-730
Safety Instructions for ARPA ARP-26 (Option)
WARNING
No one navigational aid should be relied
upon for the safety of vessel and crew.
The navigator has the responsibility to
check all aids available to confirm
position. Electronic aids are not
a substitute for basic navigational
principles and common sense.
• This auto plotter automatically tracks an
automatically or manually acquired radar
target and calculates its course and
speed, indicating them by a vector. Since
the data generated by the auto plotter
are based on what radar targets are
selected, the radar must always be
optimally tuned for use with the auto
plotter, to ensure required targets will not
be lost or unwanted targets such as sea
returns and noise will not be acquired
and tracked.
• A target does not always mean a land mass, reef, ships or other surface vessels
but can imply returns from sea surface
and clutter. As the level of clutter changes
with environment, the operator should
properly adjust the A/C SEA, A/C RAIN
and GAIN controls to be sure target
echoes are not eliminated from the
radar screen.
CAUTION
The plotting accuracy and response of
this auto plotter meets IMO standards.
Tracking accuracy is affected by the
following:
• Tracking accuracy is affected by course
change. One to two minutes is required to
restore vectors to full accuracy after an
abrupt course change. (The actual
amount depends on gyrocompass
specifications.)
• The amount of tracking delay is inversely
proportional to the relative speed of the
target. Delay is on the order of 15—30
seconds for high relative speed; 30—60
seconds for low relative speed.
Display accuracy is affected by the
following:
• Echo intensity
• Radar transmission pulsewidth
• Radar bearing error
• Gyrocompass error
• Course change (own ship or target)
iii
Safety Instructions for VIDEO PLOTTER RP-26 (Option)
CAUTION
No one navigational aid should be relied
upon for the safety of vessel and
crew. The navigator has the responsibility to check all aids available to
confirm position. Electronic aids are not
a substitute for basic navigational
principles and common sense.
❐ Digital charts cannot replace official
nautical charts.
Digital charts are intended as an aid to
navigation. Position should always be
checked against nautical charts, as well
as other aids to navigation.
❐ Digital charts cannot replace the
radar.
Digital charts can only show own ship’s
position relative to a chart feature
(coastline, lighthouse, etc.). They cannot
show other vessels, as does the radar.
Digital charts can never replace the
radar.
❐ Handle chart/memory cards carefully.
• Keep cards away from heat sources.
• Keep cards away from magnets and
magnetic material.
• Replace cards in their protective cases
after use.
iv
TABLE OF CONTENTS
INTRODUCTION ........................................................................................................ viii
SYSTEM CONFIGURATION...................................................................................ix
1. OPERATION
1.1 Turning on the Power................................................................................................ 1-1
1.2 Transmitter ON.......................................................................................................... 1-2
1.3 Control Head ............................................................................................................. 1-3
1.4 CRT Brilliance ........................................................................................................... 1-5
1.5 Tuning the Receiver .................................................................................................. 1-5
1.6 On-screen Legends and Markers.............................................................................. 1-6
1.7 Degaussing the CRT Screen..................................................................................... 1-7
1.8 Initializing the Gyro Readout ..................................................................................... 1-8
1.9 Entering Own Ship’s Speed ...................................................................................... 1-9
1.10 Presentation Modes ................................................................................................ 1-10
1.11 Selecting the Range Scale...................................................................................... 1-13
1.12 Selecting the Pulsewidth ......................................................................................... 1-13
1.13 Adjusting the Sensitivity .......................................................................................... 1-15
1.14 Suppressing Sea Clutter ......................................................................................... 1-15
1.15 Suppressing Precipitation Clutter............................................................................ 1-17
1.16 Interference Rejector............................................................................................... 1-17
1.17 Measuring the Range.............................................................................................. 1-18
1.18 Measuring the Bearing ............................................................................................ 1-20
1.19 Collision Assessment by Offset EBL ....................................................................... 1-21
1.20 Measuring Range and Bearing Between Two Targets ............................................ 1-22
1.21 Setting a Target Alarm Zone.................................................................................... 1-23
1.22 Off-Centering........................................................................................................... 1-25
1.23 Echo Stretch............................................................................................................ 1-25
1.24 Echo Averaging ....................................................................................................... 1-26
1.25 Electronic Plotting Aid (EPA) ................................................................................... 1-28
1.26 Target Trails............................................................................................................. 1-32
1.27 Parallel Index Lines................................................................................................. 1-34
1.28 Origin Mark.............................................................................................................. 1-36
1.29 Zoom ....................................................................................................................... 1-37
1.30 Markers ................................................................................................................... 1-37
1.31 Menu Keys .............................................................................................................. 1-38
1.32 RADAR 1, 2 and 3 Menu Settings........................................................................... 1-39
1.33 Function Keys ......................................................................................................... 1-40
1.34 Barge Information.................................................................................................... 1-46
1.35 Radar Map .............................................................................................................. 1-46
1.36 Suppressing Second-trace Echoes......................................................................... 1-50
1.37 Displaying External Waypoint and Navigation Line................................................. 1-50
1.38 Adjusting Brilliance of Screen Data......................................................................... 1-51
1.39 Display of Wind/Tide/Depth/Time ............................................................................ 1-52
1.40 Rate-of-Turn Scale.................................................................................................. 1-53
1.41 Alarms ..................................................................................................................... 1-54
v
2. RADAR OBSERVATION
2.1 General ..................................................................................................................... 2-1
2.2 False Echoes ............................................................................................................ 2-3
2.3 SART (Search and Rescue Transponder) ................................................................ 2-5
2.4 RACON (Radar Beacon)........................................................................................... 2-7
3. MAINTENANCE
3.1 Periodic Maintenance Schedule................................................................................ 3-2
3.2 Life Expectancy of Major Parts ................................................................................. 3-2
3.3 Replacement of Battery............................................................................................. 3-3
4. TROUBLESHOOTING
4.1 Easy Troubleshooting................................................................................................ 4-2
4.2 Advanced-level Troubleshooting............................................................................... 4-2
4.3 Diagnostic Test.......................................................................................................... 4-4
5. ARPA ARP-26 (Option for NM-type radar)
5.1 General ..................................................................................................................... 5-1
5.2 Controls for ARPA ..................................................................................................... 5-2
5.3 ARPA Menu Operation .............................................................................................. 5-2
5.4 Start-up Procedure.................................................................................................... 5-4
5.5 Automatic Acquisition ................................................................................................ 5-6
5.6 Manual Acquisition .................................................................................................... 5-9
5.7 Changing Plot Symbol Size, Plot Symbols.............................................................. 5-10
5.8 Adjusting Brilliance of Plot Marks............................................................................ 5-12
5.9 Displaying Target Data ............................................................................................ 5-13
5.10 Vector Modes .......................................................................................................... 5-14
5.11 Past Position Display .............................................................................................. 5-15
5.12 Set and Drift (Set and Rate).................................................................................... 5-16
5.13 Setting CPA/TCPA Alarm Ranges ........................................................................... 5-17
5.14 Setting a Guard Zone.............................................................................................. 5-18
5.15 Operational Warnings.............................................................................................. 5-20
5.16 Trial Maneuver ........................................................................................................ 5-21
5.17 ARPA Performance Test.......................................................................................... 5-24
5.18 Criteria for Selecting Targets for Tracking ............................................................... 5-25
5.19 Factors Affecting ARP A Functions........................................................................... 5-26
6. VIDEO PLOTTER RP-26 (Option for NM-type radar)
6.1 General ..................................................................................................................... 6-1
6.2 The Video Plotter Display.......................................................................................... 6-2
6.3 Display Modes........................................................................................................... 6-2
6.4 Set-up of Video Plotter Display ................................................................................. 6-4
6.5 Track ......................................................................................................................... 6-6
6.6 Marks, Lines.............................................................................................................. 6-8
6.7 Waypoints.................................................................................................................6-11
6.8 Navigation Lines...................................................................................................... 6-13
6.9 Recording, Replaying Data ..................................................................................... 6-16
6.10 Initial Settings.......................................................................................................... 6-17
vi
APPENDIX
Menu Tree..........................................................................................................................A-1
Set-up for Fishing Vessel ...................................................................................................A-6
SPECIFICATIONS ..................................................................................................SP-1
INDEX
vii
INTRODUCTION
A Word to the Owner of FURUNO Radar
Thank you for purchasing this FURUNO radar. We are confident you will discover why
FURUNO has become synonymous with quality and reliability.
Dedicated in the design and manufacture of marine electronics equipment for more than
half a century , FURUNO Electric Company has gained an unrivaled reputation as a world
leader in the industry. This is the result of our technical excellence as well as our worldwide distribution and service network.
Please carefully read and follow the safety information and operating and maintenance
instructions set forth in this manual before attempting to operate the equipment and conduct any maintenance. Your radar set will perform to the utmost of its ability only if it is
operated and maintained in accordance with the correct procedures.
Features of this Series of Radars
• Daylight-bright rasterscan 21-inch multi-color, high-resolution display
• New microprocessing technology with high-speed high-density gate array and software
expertise
• New cast aluminum scanner gearbox and new series of radiators
• Easy operation by combination of discrete keys, rotary controls, and menu operation,
all logically arranged and configured.
• Electronic Plotting Aid (EPA) fitted standard.
• Reliable CPA and TCPA warning in any plotting mode, accurate target data.
• Stand-alone or integrated configuration
• A Video Plotter (Chart Plotter) is also optionally available.
viii
SYSTEM CONFIGURATION
XN12AF-RSB-0074-063
XN12AF-RSB-0075-063
XN20AF-RSB-0074-063
XN20AF-RSB-0075-063
XN24AF-RSB-0074-063
XN24AF-RSB-0075-063
DISPLAY UNIT
ANTENNA UNIT
RDP-126
ARPA
ARP-26*
Gyrocompass
Navigator
Speed Log
Option
IEC-61162-1 Serial Data
(Input/Output)
IEC-61162-1 Serial Data
(Input)
* Not available for statute
mile-(SM) type radar.
Ship's Mains
24-32 VDC
or
100-115/220-230 VAC
1, 50/60 Hz
Gyro Converter
GC-8
Video Plotter
RP-26*
Alarm Kit
DC spec
Rectifier
RU-3424
Slave Display
FMD-8010
Performance
Monitor
PM-30
AC spec
Transformer Unit
RU-1803
440 VAC
1, 50/60 Hz
AC spec or DC spec to be selected.
ix
1. OPERATION
1.1 Turning on the Power
DANGER
Before turning on the radar, make sure
no one is near the antenna unit.
Serious injury or death may result if a
rotating antenna strikes someone standing
nearby.
The [POWER] switch is located at the left corner of the control head. Push it to switch on
the radar system. To turn off the radar, push it again. The screen shows the bearing scale
and digital timer in approximately 15 seconds after power-on. The timer counts down
three minutes of warm-up time. During this period the magnetron, i.e., transmitter tube, is
warmed for transmission. When the timer has reached 0:00, the indication STBY appears,
indicating the radar is now ready to transmit pulses.
POWER switch
Tuning
Compartment
Control Head
Figure 1-1 Display unit
Note: Allow 10 seconds to elapse before turning off the power, to permit writing of
settings.
In warm-up and standby condition, you will see the message BRG SIG MISSING. This is
normal because a bearing (azimuth) signal is not yet generated when the antenna is not
rotating. ON TIME and TX TIME values shown at the bottom of the screen are the time
counts in hours and tenths of hour the radar has been powered.
1-1
1.2 Transmitter ON
When the STANDBY status is displayed on the screen, press the transmit switch labeled
STBY/TX on the control head of the display unit.
The radar is initially set to previously used range and pulsewidth. Other settings such as
brilliance levels, VRMs, EBLs and menu option selections are also set to previous settings.
The transmit switch toggles the radar between STANDBY and TRANSMIT status. The
antenna stops in STANDBY status and rotates in TRANSMIT status.
If the antenna does not rotate in TRANSMIT status, check whether the antenna switch in
the tuning compartment is in the OFF position.
The magnetron ages with time resulting in a reduction of output power . It is highly recommended that the radar be set to ST ANDBY status when not used for an extended period of
time.
Note: The example screens shown in this manual may not match the screens you see on
your display. The screen you see depends on your system configuration and equipment
settings.
Quick start
Provided that the radar was once in use with the transmitter tube (magnetron) still warm,
you can turn the radar into TRANSMIT condition without 3-minutes standby . If the [POWER]
switch has been turned off by mistake or the like and you wish to restart the radar promptly ,
turn on the switch not later than 10 seconds after power-off.
Video Freeze-up Recovery
Video freeze-up or lock-up can occur unexpectedly on any digital rasterscan radars.
This is mainly caused by heavy spike noise
in the power line and can be noticed by
carefully watching the nearly visible sweep
line. If you suspect that the picture is not
updated every scan of the antenna or no
key entry is accepted notwithstanding the
apparently normal pictures, do Quick Start
to restore normal operation.
1. Turn off the [POWER] switch and within
10 seconds turn it on again.
2. Press the Transmit switch labeled
STBY/TX for transmit condition.
1-2
Note: This equipment has a self-diagnostic
function to check operational software
periodically. If any trouble has been found,
the ERROR lamp lights. In this case, do the
above procedure.
1.3 Control Head
A/C RAIN
Suppresses clutter from
rain, snow, clouds.
BRILLIANCE
Adjusts the brightness
of entire screen.
A/C SEA
Suppresses sea clutter to
improve the short range
discrimination.
AUDIO OFF
Acknowledges audible alarms, no effect on
visual alarms.
RADAR MENU
Sets various parameters for
radar operation and radar map.
GAIN
Adjusts the radar sensitivity.
NAV MENU
Sets parameters for nav info.
PLOT MENU
for plotting
POWER
ON
OFF
PM
ANTENNA
TUNE
DEGAUSS ERROR
OFF ON
EBL
EBL Control,
EBL ON/OFF Keys
Pressing ON key toggles
between No.1 and No.2
EBLs.
FUNCTION Keys
#1: Set-up 1
#2: Set-up 2
#3: Set-up 3
#4: Set-up 4
BRILLIANCE A/C RAIN A/C SEA GAIN
#1 #2
#3 #4
RANGE
STBY
TX
TRANSMIT/STANDBY
RANGE Keys
Select the range scales.
Figure 1-2 Control head
HL
PANEL
MODE
BRILL
2
1
4
7
VECTOR
CHART
ALIGN
CU, TM
RESET
LOST
TARGET
5
MARK
8
A/C
AUTO
0
ENTER
OFF ON
VRM
OFF
OFF
CENTER
EBL
TARGET
TRAILS
CANCEL
VRM Control,
VRM ON/OFF Keys
Pressing ON key toggles
between No.1 and No.2
VRMs.
AUDIO
RADAR
PLOT
OFF
ACQ
TARGET
DATA
TARGET
CANCEL
MENU
3
6
9
MENU
NAV
MENU
TRACKBALL
Shifts the cursor for plotting,
entering reference points,
etc.
1-3
(3) (2) (1)
(12)
(4)
(5)
HL
OFF
OFF
CENTER
EBL
OFFSET
TARGET
TRAILS
CANCEL
(1 1) (6)
1
4
7
PANEL
BRILL
2
VECTOR
5
CHART
ALIGN
8
CU, TM
RESET
0
(14)
MODE
LOST
TARGET
MARK
A/C
AUTO
ENTER
(7),
AUDIO
3
OFF
RADAR
MENU
PLOT
MENU
NAV
MENU
(13)
6
ACQ
9
TARGET
DATA
TARGET
CANCEL
(8)
(9)
(10)
(15)
(16)
Figure 1-3 Control head, key panel
(1) MODE: Selects presentation modes: Head-up, Head-up TB, North-up, Course-up and
True Motion.
(2) PANEL BRILL: Adjusts brightness of the control head panel.
(3) HL OFF: Temporarily erases the heading line.
(4) OFF-CENTER: Activates and deactivates off-centering of the own ship position.
(5) EBL OFFSET: Activates and deactivates off-centering of the EBL origin.
(6) CU, TM RESET: Resets the heading line to 000° in course-up mode; moves own ship
position to 50% (75% for NM-type radar) radius in stern direction in the T rue Motion mode.
(7) A/C AUTO: Reduces sea clutter at preset level. Permits manual override by A/C SEA
and A/C RAIN controls.
(11) TARGET TRAILS/CANCEL: Erases target trails.
Keys for EPA or ARPA (optional)
(8) ACQ: Acquires a target after selecting it by trackball.
(9) TARGET DATA: Displays acquired target data.
(10) TARGET CANCEL: Terminates plotting of a specified target or all tracked targets.
(12) VECTOR: Selects vector mode; true or relative.
(13) LOST TARGET: Silences the lost target audible alarm and erases the lost target
symbol.
(14) CHART ALIGN: Aligns chart with the radar display. Used with radar map/video plot-
ter.
(15) MARK: Enters/erases mark. Used with radar map/video plotter.
(16) ENTER: Used to save settings on menu screen.
Keys 0-9: Select video plotting symbols. Also used for entering numeric data in any mode
as applicable.
1-4
1.4 CRT Brilliance
The [BRILLIANCE] control on the control head of the display unit adjusts the entire screen
brightness. Note that the optimum point of adjustment varies with ambient light conditions,
especially between daytime and nighttime.
Note: The CRT brilliance should be adjusted before adjusting relative brilliance levels on
the BRILLIANCE menus to be explained later.
1.5 Tuning the Receiver
Tuning method can be selected at the RADAR 3 menu; auto or manual.
1. Press the [RADAR MENU] key.
2. Press [0], [0], [2], [0] and [0] in sequence to display the RADAR 3 menu.
3. Press the [9] key twice to select AUTO or MAN(ual).
4. Press the [ENTER] key to confirm your selection.
5. Press the [RADAR MENU] key to close the menu.
1.5.1 Automatic tuning
The radar receiver is tuned automatically each time the power is turned on; thus, there is
no front panel control for tuning. The tuning indicator and the label AUTO TUNE at the top
right corner of the display unit show the tuning circuit is working.
1.5.2 Manual tuning
If you are not satisfied with the current tune setting, follow these steps to fine-tune the
receiver:
1. Set the tuning method to manual as described above.
2. While observing the picture on the 48 mile scale, slowly adjust the [TUNE] control in
the tuning compartment and find the best tuning point.
[TUNE] control
Figure 1-4 Control head, showing tuning compartment
3. Make sure that the radar has been set to the best tuning point. This condition is where
the tuning indicator lights to about 80% of its total length. Note that the tuning indicator
will never extend to full length.
ERROR lamp
1-5
1.6 On-screen Legends and Markers
Rate-of-Turn Scale
Heading Marker
Range/Range
Ring Interval
Range and bearing
to cursor
Presentation
mode
Pulselength
Echo Averaging
Interference Rej.
Echo Stretch
Guard Alarm
Cursor
No.1 VRM
No.2 VRM
Wind data from
ext. equipment
Zoom
X-band
A/C AUTO
Noise Rej.
Off-center
No.1 EBL bearing
No.2 EBL bearing
0.75
/0.25SM
+0.350SM
330.0° T
HEAD UP RM
PULSE 1 M1
EAV3
IR1
320
ES3
310
300
290
280
270
260
250
240
230
220
ZOOM
X-BAND
A/C AUTO
NOISE REJ
OFFCENTER
EBL
044.4° T
>130.1° T<
2nd Trace
Echo Rejector
P
2ND ECHO
340
330
WS
NE
210
200
INDEX
>236.8° T<
0° 30° 60° 90°30°60°90°
000
350
010
DATA DISPLAY
(See next page.)
190
180
170
Heading Line
SB
AUTO TUNE
/MIN
WATCH 5 : 30
HDG 123.4°T GYRO
SPEED 14.8KT WT LOG
020
030
150
160
TGT ALARM 1
TGT ALARM 2
Tuning Bar
ANT1 MAIN
SET & DRIFT
040
050
0
20
40
60
80
100
m
10MIN
20-30
130
140
TRUE TRAIL
3MIN 1:25
VRM
>0.600SM<
0.150SM
060
070
080
090
100
110
120
Heading
Speed Source,
Speed
Antenna,
Display in use
Set & Drift
Fixed Range
Rings
No.1 EBL
No.2 EBL
Depth data from
ext. equipment
North Marker
Target Trail
Trail Time/
Time Elapsed
Target Alarm
No.1 VRM range
No.2 VRM range
Parallel Index
Lines Orientation
Stern Marker
Watch
Figure 1-5 On-screen legends and markers
Note: With the serial speed inputs and SOG selection, if the type of data is changed from
SOG to STW, the label SOG appears in red at the upper right corner on the screen.
1-6
EPA
Target
Data
01
RNG
BRG
CSE
SPD
CPA
TCPA
BCR
BCT>
0 : 03
0.439SM
122.7°T
254.2°T BT TRU
14.9KT BT TRU
0.4SM
0.0MIN
0.8SM
99.9MIN
DEPTH
CURRENT
WIND
01 − > +
21.1m
1.2KT
105.7°T
11.3KT
285.6°T
0.101SM
254.3°T
Nav Data
Range and bearing
from origin mark to
cursor
EPA Setting
Position
EPA
TRUE VECTOR 6MIN BT
OWN SHIP [GP]
MAN
34°57.843N
135°57.720E
WPT 12
1999/03/03 13:28 UTC
+CURSOR POSN
MAN
150.8SM
72.1°T
34°57.692N
134°57.597E
Range and Bearing
to Waypoint*
Date, Time
Cursor Position
* Nav data displayed when no
Alarm Message
waypoint is selected.
Area
Figure 1-6 Data display
1.7 Degaussing the CRT Screen
Each time the radar is turned on, the degaussing circuit automatically demagnetizes the
CRT screen to eliminate color contamination caused by earth’ s magnetism or magnetized
ship structure.
The screen is also degaussed automatically at certain time intervals. While being degaussed, the screen may be disturbed momentarily with vertical lines. If you wish to degauss by manual operation, open the tuning compartment and press the [DEGAUSS]
switch.
[POWER] switch
Tuning compartment
POWER
ON
PM
ANTENNA
TUNE
DEGAUSS ERR
OFF ON
EBL
[DEGAUSS] switch
BRILLIANCE A/C RAIN A/C SEA GAIN
#1 #2
#3 #4
RANGE
STBY
TX
Figure 1-7 Control head, showing tuning compartment
1-7
1.8 Initializing the Gyro Readout
When a gyrocompass is interfaced with the radar, ship’s heading is displayed at the top
right-hand corner of the screen. Upon turning on the radar, align the on-screen HDG readout with the gyrocompass reading by the procedure shown below. Once you have set the
initial heading correctly, resetting is not usually required. However, if the HDG readout
goes wrong for some reason, repeat the procedure to correct it.
1. Press the [RADAR MENU] key to display the FUNCTIONS 1 menu.
[FUNCTIONS (1)]
1 TARGET TRAILS
2 TARGET ALARM (1 or 2)
3 ORIGIN MARK (1 to 10)
4 INDEX LINES
5 ZOOM
6 PULSE WIDTH
7 INT REJECT
8 ARPA
9 VIDEO PLOT
0 [FUNCTIONS (2)]
Figure 1-8 FUNCTIONS 1 menu
2. Press the [0] key twice to display the FUNCTIONS 3 menu.
[FUNCTIONS (3)]
1 [FUNCTIONS (2)]
2 [RADAR (1)]
3 [FUNCTION KEY 1]
4 [FUNCTION KEY 2]
5 [FUNCTION KEY 3]
6 [FUNCTION KEY 4]
7 RADAR 1/2
8 INTER SWITCH
9 GYRO SETTING
0 [FUNCTIONS (4)]
Figure 1-9 FUNCTIONS 3 menu
3. Press the [9] key to select the option GYRO SETTING.
4. Rotate the EBL control to adjust the gyrocompass (heading) reading.
5. Press the [ENTER] key to confirm the setting.
1-8
1.9 Entering Own Ship’ s Speed
EPA and any azimuth stabilized presentation modes require speed input and gyrocompass signal. The speed can be entered from a speed log (automatic) or through the plotting keypad (manual).
1.9.1 Automatic speed input
1. Press the [RADAR MENU] key and the [0] key to show the FUNCTIONS 2 menu.
[FUNCTIONS (2)]
1 [FUNCTIONS (1)]
2 BKGD COLOR BLK(GRN CHAR)/
BLK(RED CHAR)/
BLU (ECHO AREA)
BLU/
BRT BLU
3 ECHO STRETCH OFF/1/2/3
4 ECHO AVERAGE OFF/1/2/3
5 ECHO COLOR YEL/GRN/COLOR
6 SHIP SPEED LOG/NAV/MAN
MAN = 00.0KT
(STW/SOG)
7 SET, DRIFT OFF/MAN
SET = 000.0°
DRIFT = 00.0KT
8 INDEX LINES NO. 2 VRM/MAN
MAN = 00.00SM
9 [BRILLIANCE (1)]
0 [FUNCTIONS (3)]
SOG (Speed-over-the-ground) is the Speed Made Good
over the ground determined by EPFS, Echo Reference or
Dual-axis speed log. It is obtained by a distance between
points over the ground divided by the time spent for
traveling between these two points.
Figure 1-10 FUNCTIONS 2 menu
2. Press the [6] key to select menu item 6 SHIP SPEED.
3. Press the [6] key to select LOG or NAV.
4. When the serial speed data is selected at the installation menu, select the speed mode,
STW (speed through the water) or SOG (speed over the ground). If pulse speed data
is selected, the STB/SOG does not appear.
5. Press the [ENTER] key to confirm your selection followed by the [RADAR MENU] key
to close the FUNCTIONS menu. The ship’s speed readout at the screen top shows
own ship’s speed fed from the speed log followed by the label “LOG.”
Notes on automatic speed input
1) IMO Resolution A.823(19) for ARP A recommends that a speed log to be interfaced with
an ARPA should be capable of providing through-the-water speed.
2) Be sure not to select LOG when a speed log is not connected. If the log signal is not
provided, the ship’s speed readout at the top right-hand corner will be blank.
3) SPD **.* and SIGNAL MISSING LOG appears if no log signal is present for 30 seconds
while the ship’s speed has been more than 5.0 kt.
4) With the serial speed inputs and SOG selection, if the type of data is changed from
SOG to STW, the label SOG appears in red at the upper right corner on the screen.
1-9
1.9.2 Manual speed input
1. Press [RADAR MENU], [0] to show the FUNCTIONS 2 menu.
2. Press the [6] key to select menu 6 SHIP SPEED.
3. Press the [6] key to select (or highlight) MAN.
4. Press the [ENTER] key to confirm selection. At this point, “MAN = 00.0KT” appears on
the FUNCTIONS 2 menu.
5. Enter the ship speed by hitting corresponding numeric keys followed by the [ENTER]
key without omitting leading zeros, if any. For example, if the ship speed is 8 knots,
press [0], [8], [ENTER].
6. Press the [RADAR MENU] key to close the FUNCTIONS 2 menu. The ship speed
readout at the top right-hand corner shows own ship speed entered followed by the
label “MAN.”
1.10 Presentation Modes
This radar has the following presentation modes:
Relative Motion (RM)
Head-up: Unstabilised
Head-up TB: Head-up with gyrocompass-stabilized bearing scale (True Bearing) where
the bearing scale rotates with the gyrocompass reading.
Course-up: Gyrocompass-stabilized relative to ship’s intended course
North-up: Gyrocompass-stabilized with reference to north
True Motion (TM)
North-up: Ground or sea stabilized with gyrocompass and speed inputs
1.10.1 Selecting presentation mode
Press the [MODE] key on the control head. Each time the [MODE] key is pressed, the
presentation mode and mode indication at the upper left-hand corner of the screen change
cyclically .
Loss of Gyrocompass SignalLoss of Gyrocompass Signal
When the gyro compass signal is lost, the
presentation mode automatically becomes
head-up and the HDG (heading) readout at
the top right-hand corner shows ***.*.
When the gyrocompass signal is restored,
the indication SET HDG appears at the
upper-right corner on the screen. Press the
[MODE] key, and the asterisks go off. Align
the HDG readout with the gyrocompass
reading, referring to the paragraph 1.8.
Finally, press the CANCEL key to erase the
message SET HDG.
HL
OFF
OFF
CENTER
EBL
TARGET
TRAILS
CANCEL
PANEL
BRILL
1
VECTOR
4
CHART
ALIGN
7
CU, TM
RESET
[MODE] key
MODE
AUDIO
LOST
MARK
A/C
AUTO
OFF
3
6
ACQ
TARGET
9
DATA
TARGET
CANCEL
2
TARGET
5
8
0
ENTER
RADAR
MENU
PLOT
MENU
NAV
MENU
1-10
Figure 1-11 Control head, key panel
Presentation mode,
representative display
H
E
A
D
U
P
280
270
260
300
290
250
North
Marker
310
240
230
000
350
340
330
320
220
210
200
190
180
Heading
Marker
010
020
030
150
160
170
Heading
Line
040
050
130
140
Description
A display without azimuth stabilization in which the
line connecting the center with the top of the display
indicates own ship’s heading.
060
120
The target pips are painted at their measured distances and in their directions relative to own ship’s
070
heading.
080
090
A short line on the bearing scale is the north marker
100
indicating gyrocompass north. A failure of the gyro-
110
compass input will cause the north marker to disappear and the readout to show asterisks (***.*).
Radar echoes are shown in the same way as in the
head-up mode. The difference from normal head-up
presentation lies in the orientation of the bearing
scale. The bearing scale is gyrocompass stabilized.
That is, it rotates in accordance with the gyrocompass signal, enabling you to know own ship’s
310
heading at a glance.
320
330
This mode is available only when the radar is interfaced with a gyrocompass.
340
350
If the gyrocompass fails, the bearing scale returns to
the state of head-up mode.
230
070
240
060
Heading
Marker
250
260
270
030
040
050
Heading
Line
280
290
010
020
300
000
H
E
A
D
190
180
U
P
170
160
T
150
R
140
U
130
E
120
B
110
E
A
200
100
210
090
220
080
R
I
N
Bearing scale rotates with
gyrocompass signal.
G
Heading
Marker
280
270
260
300
290
250
240
North
Marker
320
310
230
220
000
010
350
340
330
210
200
190
020
160
170
180
C
O
U
R
S
E
U
P
030
150
Heading
Line
040
050
130
140
060
070
080
100
110
120
An azimuth stabilized display in which a line connecting the center with the top of the display indicates
own ship’s intended course (namely, own ship’s
previous heading just before this mode has been
selected).
Target pips are painted at their measured distances
and in their directions relative to the intended course
090
which is maintained at the 0-degree position while the
heading line moves in accordance with ship’s yawing
and course change. This mode is useful to avoid
smearing of picture during course change. After a
course change, press the [CU, TM RESET] key to
reset the picture orientation if you wish to continue
using the course-up mode. The heading line gets
back to scale zero.
1-11
Presentation mode,
representative display
North
000
350
340
200
190
180
North
000
350
340
200
190
180
M
N
O
R
T
H
290
280
U
270
P
260
250
330
320
310
300
240
230
220
210
T
R
U
E
290
280
O
270
T
260
I
250
O
N
330
320
310
300
240
230
220
210
Heading Line
010
020
160
170
Heading Line
010
020
030
150
160
170
030
150
040
050
130
140
Heading
Marker
040
050
130
140
Heading
Marker
060
070
080
090
100
110
120
060
070
080
090
100
110
120
Description
In the north-up mode, target pips are painted at their
measured distances and in their true (compass)
directions from own ship, north bearing maintained up
of the screen. The heading line changes its direction
according to the ship’s heading.
If the gyrocompass fails, the presentation mode
changes to head-up and the north marker disappears.
Also, the HDG readout shows asterisks (***.*).
Own ship and other moving objects move in accordance with their true courses and speed. In ground
stabilized TM, all fixed targets, such as landmasses,
appear as stationary echoes. In the sea stabilized TM
without set and drift inputs, the landmass can move on
the screen.
When own ship reaches a point corresponding to 50%*
of the radius of the display, it is automatically reset to a
point of 50%* radius opposite to the extension of the
heading line passing through the display center.
Resetting can be made at any moment before the ship
reaches the limit by pressing the [CU, TM RESET] key.
Automatic resetting is preceded by a beep sound.
If the gyrocompass fails, the mode is changed to the
head-up and the north marker disappears. The HDG
readout shows asterisks (***.*).
000 010
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170180190
320
310
300
290
280
270
260
250
240
230
220
000 010
350
170180190
020
030
150
160
Target trail
040
050
060
070
080
090
100
110
120
130
140
320
310
300
290
280
270
260
250
240
230
220
340
330
210
200
000 010
350
340
330
210
200
020
030
150
160
170180190
(a) True motion selected (b) Own ship has reached a (c) Own ship is automatically
point 50%* of display radius reset to 50%* of radius
* 75% in case of NM-type radar.
040
050
060
070
080
090
100
110
120
130
140
1-12
1.11 Selecting the Range Scale
The display range scale is changed by pressing the [+] and [-] keys. The selected range
scale and range ring interval are shown at the upper left corner on the screen. When a
target of interest comes closer, reduce the range scale so that it appears in 50–90% of the
display radius. The range scales are:
0.25–0.5–0.75–1–1.5–2–3–4–6–8–12–16–24–32–48–96 SM
1.12 Selecting the Pulsewidth
The pulsewidth in use is displayed at the upper left-hand position of the screen using the
abbreviations shown in the table below.
Appropriate pulsewidths are preset to individual range scales and function keys. Therefore, you are not usually required to select them. If you are not satisfied with the current
pulsewidth settings, however, it is possible to change them on the RADAR 1 menu as
shown in paragraph 1.12.2.
You can choose the pulsewidth 1 or 2 on the scales 0.5 to 24 SM ranges.
1.12.1 Selecting pulsewidth 1 or 2
1. Press the [RADAR MENU] key to display the FUNCTIONS 1 menu.
2. Press the [6] key to select PULSE WIDTH 1 or 2 as appropriate.
3. Press the [RADAR MENU] key to close the FUNCTIONS 1 menu.
Table 1-1 Available pulsewidths
lebaLhtdiwesluP
)1esluptrohS(1Ssµ70.0
)2esluptrohS(2Ssµ51.0
)1eslupmuideM(1Msµ3.0
)2eslupmuideM(2Msµ5.0
)3eslupmuideM(3Msµ7.0
)eslupgnoL(Lsµ2.1
1.12.2 Presetting pulsewidth 1 and 2
Pulsewidth 1 and 2 can be preset on the PULSE WD 1 and 2 menus. Shown below are
examples of the pulsewidth setup procedure.
1. To enable selection of S1 (0.07 µs) and S2 (0.15 µs) pulsewidth on the 0.5 SM range,
select S1 at 0.5 SM on the PULSE WD 1 menu and S2 at 0.5 SM on the PULSEWIDTH
2 menu.
1-13
2. To enable selection of S2 (0.15 ms) and M1 (0.3 ms) pulsewidth on the 3 SM range,
select S2 at 3 SM in the PULSE WD 1 menu and M1 at 3 SM in the PULSE WD 2
menu.
A longer pulse provides an increased detection range, but with reduced discrimination. If
you need discrimination in preference to detection, choose a shorter pulse.
Example: To select S1 (0.07 ms) as Pulsewidth 1 for the 0.5 SM range, display the PULSE
WIDTH 1 menu following the steps shown above and hit the [2] key to choose “0.5 SM.”
Further hit the [2] key until the menu option “S1” is highlighted to the right of “0.5 SM.”
[RADAR MENU] key
[FUNCTIONS (1)]
1 TARGET TRAILS
2 TARGET ALARM (1 or 2)
3 ORIGIN MARK (1 to 10)
4 INDEX LINES
5 ZOOM
6 PULSE WIDTH
7 INT REJECT
8 ARPA
9 VIDEO PLOT
0 [FUNCTIONS (2)]
[0] key [1] key
[FUNCTIONS (2)]
1 [FUNCTIONS (1)]
2 BKGD COLOR BLK(GRN CHAR)/
BLK(RED CHAR)/
BLU (ECHO AREA)
BLU/
BRT BLU
3 ECHO STRETCH OFF/1/2/3
4 ECHO AVERAGE OFF/1/2/3
5 ECHO COLOR YEL/GRN/COLOR
6 SHIP SPEED LOG//NAV/MAN
MAN = 00.0KT
(STW/SOG)
7 SET, DRIFT OFF/MAN
SET = 000.0°
DRIFT = 00.0KT
8 INDEX LINES NO. 2 VRM/MAN
9 [BRILLIANCE (1)]
0 [FUNCTIONS (3)]
MAN = 00.00SM
[0] key [1] key
[FUNCTIONS (3)]
1 [FUNCTIONS (2)]
2 [RADAR (1)]
3 [FUNCTION KEY 1]
4 [FUNCTION KEY 2]
5 [FUNCTION KEY 3]
6 [FUNCTION KEY 4]
7 [RADAR 1/2
8 INTER SWITCH
9 GYRO SETTING
EBL= xxx.x°
0 [FUNCTIONS (4)]
[2] key
[RADAR (1)]
1 [FUNCTIONS (3)]
2 EBL 1 REL/TRUE
3 EBL 2 REL/TRUE
4 VRM 1* NM/km
5 VRM 2* NM/km
6 TRAIL REL/TRUE
7 TRAIL GRAD SGL/MUL T
8 [PULSE WD 1]
9 [PULSE WD 2]
0 [RADAR (2)]
* Does not appear on
SM-type radar.
Figure 1-12 Sequence for selecting pulsewidth
In the RADAR 1 menu, select 8 for pulsewidth 1, or 9 for pulsewidth 2.
0.5 SM range S1/S2 0.75 SM range S1/S2/M1
1.5 SM range S1/S2/M1 3 SM range S2/M1/M2/M3
6 SM range M1/M2/M3/L 12-24 SM range M2/M3/L
1-14
1.13 Adjusting the Sensitivity
The [GAIN] control is used to adjust the sensitivity of the receiver , and thus the intensity of
echoes as they appear on the screen. It should be adjusted so that the speckled background noise is just visible on the screen.
To become acquainted with the way the [GAIN] control works, try rotating it between fully
counterclockwise and clockwise positions while observing the radar picture. You will notice that clockwise rotation increases the echo intensity level. A low gain setting results in
the loss of weak echoes and a reduced detection range. If you turn the [GAIN] control too
far clockwise for an excessive gain setting, desired echoes will be masked in the strong
background noise.
[GAIN] control
POWER
ON
PM
ANTENNA
TUNE
DEGAUSS ERR
BRILLIANCE
OFF ON
EBL
A/C RAIN A/C SEA GAIN
#1 #2
#3 #4
RANGE
STBY
TX
Figure 1-13 Control head
1.14 Suppressing Sea Clutter
In rough weather conditions returns from the sea surface are received over several miles
around own ship and mask close targets. This situation can be improved by properly
adjusting the [A/C SEA] (Anti-Clutter Sea) control.
[A/C SEA] control
OFF ON
EBL
BRILLIANCE A/C RAIN A/C SEA GAIN
#1 #2
#3 #4
RANGE
STBY
TX
Figure 1-14 Control head, A/C SEA effect
[A/C SEA] control off
[A/C SEA] control
adjusted
1-15
1.14.1 Automatic anti-clutter control
The easiest way to suppress the surface clutter is to use the automatic anti-clutter control.
Press the [A/C AUTO] key to turn the A/C AUT O circuit on or off. A/C AUT O appears at the
bottom left-hand corner of the screen when the A/C AUTO circuit is on.
Use of a function key is also a good method for reducing sea clutter. For this purpose,
presetting is required. Consult a FURUNO representative.
HL
PANEL
MODE
OFF
OFF
CENTER
EBL
TARGET
TRAILS
CANCEL
BRILL
2
1
LOST
VECTOR
CHART
ALIGN
CU, TM
RESET
TARGET
5
MARK
8
A/C
AUTO
0
ENTER
4
7
[A/C AUTO] key
AUDIO
RADAR
OFF
3
6
TARGET
9
TARGET
CANCEL
MENU
ACQ
DATA
NAV
PLOT
MENU
MENU
The auto A/C function can erase weak
targets.
Figure 1-15 Control head
CAUTION
1.14.2 Manual anti-clutter control
From the fully counterclockwise position, slowly turn the [A/C SEA] control clockwise. For
optimum target detection, you should leave speckles of the surface return slightly visible.
The anti-clutter sea control is often referred to as STC (Sensitivity Time Control) which
decreases the amplification of the receiver immediately after a radar pulse is transmitted,
and progressively increases the sensitivity as the range increases.
A common mistake is to over-adjust the [A/C SEA] control so that the surface clutter is
completely removed. By rotating the control fully clockwise, you will see how dangerous
this can be; a dark zone is created near the center of the screen and close-in targets can
be lost. This dark zone is even more dangerous if the gain has not been properly adjusted.
Always leave a little surface clutter visible on the screen. If no surface clutter is observed
(on very calm waters), set the control at the fully counterclockwise position.
1-16
1.15 Suppressing Precipitation Clutter
In adverse weather conditions, clouds, rain or snow produce a lot of spray-like spurious
echoes and impairs target detection over a long distance. This situation can be improved
by using a function key provided that it is so programmed. If the function key fails to offer
a favorable suppression of the rain clutter, adjust the [A/C RAIN] control on the control
head.
[A/C RAIN] control
BRILLIANCE A/C RAIN A/C SEA GAIN
OFF ON
EBL
#1 #2
#3 #4
RANGE
STBY
TX
[A/C RAIN] control
off
[A/C RAIN] control
adjusted
Figure 1-16 Control head, A/C RAIN effect
The [A/C RAIN] control adjusts the receiver sensitivity as the [A/C SEA] control does but
rather in a longer time period (longer range). Clockwise rotation of this control increases
the anti-clutter effect.
1.16 Interference Rejector
Mutual radar interference may occur in the vicinity of another shipborne radar operating in
the same frequency band. It is seen on the screen as a number of bright spikes either in
irregular patterns or in the form of usually curved spoke-like dotted lines extending from
the center to the edge of the picture. This type of interference can be reduced by activating
the interference rejector circuit.
The interference rejector is a kind of signal correlation circuit. It compares the received
signals over successive transmissions and suppresses randomly occurring signals. There
are three levels of interference rejection depending on the number of transmissions that
are correlated. These are indicated by the legends IR1, IR2 and IR3 at the upper left-hand
position of the screen.
Figure 1-17 Interference
1-17
To activate the interference rejector;
1. Press the [RADAR MENU] key. The following appears.
[FUNCTIONS (1)]
1 TARGET TRAILS
2 TARGET ALARM (1 or 2)
3 ORIGIN MARK (1 to 10)
4 INDEX LINES
5 ZOOM
6 PULSE WIDTH
7 INT REJECT
8 ARPA
9 VIDEO PLOT
0 [FUNCTIONS (2)]
Figure 1-18 RADAR menu
2. Press the [7] key to select INT REJECT.
3. Successive presses of the key increase the effect of interference rejection, up to level
3. A fourth press deactivates the interference rejector . Switch off the interference rejector when no interference exists; otherwise weak targets may be lost.
Note: For stable reception of certain types of radar beacons (Racons) or SART (Search
and Rescue Radar Transponder) as required by SOLAS 1974 as amended 1988 (GMDSS),
it is recommended to turn the interference rejector off.
1.17 Measuring the Range
Use the fixed range rings to obtain a rough estimate of the range to a target. They are the
concentric solid circles about own ship, or the sweep origin. The number of rings is automatically determined by the selected range scale and their interval is displayed at the
upper-left position of the screen.
1.17.1 Adjusting range ring briliance
1. Press the [RADAR MENU] key to display the FUNCTIONS 1 menu.
2. Press the [0] key to display the FUNCTIONS 2 menu.
3. Press the [9] key to display the BRILLIANCE 1 menu.
[BRILLIANCE (1)]
1 [FUNCTIONS (2)]
2 RINGS BRILL OFF/DIM/M1/M2/BRT
3 EBL BRILL DIM/M1/M2/BRT
4 VRM BRILL DIM/M1/M2/BRT
5 +CURSOR BRILL OFF/DIM/M1/M2/BRT
6 CHAR BRILL DIM/M1/M2/BRT
7 MARK BRILL DIM/M1/M2/BRT
8 TRAIL BRILL DIM/M1/M2/BRT
9 HL BRILL DIM/M/BRT
0 [BRILLIANCE (2)]
1-18
Figure 1-19 BRILLIANCE 1 menu
4. Press the [2] key to select RINGS BRILL.
5. Press the [2] key again. Each pressing gradually increases the brightness of the rings
in 4 steps and the fifth pressing erases them.
6. Press the [ENTER] key to confirm you selection.
7. Press the [RADAR MENU] key to close the menu.
1.17.2 Measuring the range with the VRM
Use the V ariable Range Markers (VRMs) for more accurate measurement of the range to
a target. There are two VRMs, No. 1 and No. 2, which appear as dashed rings so that you
can discriminate them from the fixed range rings. The two VRMs can be distinguished
from each other by different lengths of dashes.
1. Press the [VRM ON] key to display either of the VRMs. Successive presses of the
[VRM ON] key toggle the active VRM between No. 1 and No. 2 and the currently active
VRM readout is marked with >.....<.
2. Turning the VRM control, align the active variable range marker with the inner edge of
the target of interest and read its distance at the lower-right corner of the screen. Each
VRM remains at the same geographical distance when you operate the RANGE+ or
RANGE- key . This means that the apparent radius of the VRM ring changes in proportion to the selected range scale.
3. Press the [VRM OFF] key to key to erase each VRM.
000
010
350
340
No.1
VRM
290
280
270
260
250
330
320
310
300
240
230
220
210
200
190
Active VRM is identified
with this marker.
020
030
040
050
060
120
130
140
150
160
170
180
VRM
>0.66SM<
1.18SM
Figure 1-20 How to measure range with VRM
Target
blip
070
080
090
100
No.2
110
VRM
1-19
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