Furuno Radar Detector CSH 5L User Manual

COLOR SCANNING SONAR  
CSH-5L/CSH-8L  
 
SAFETY INSTRUCTIONS  
WARNING  
WARNING  
ELECTRICAL SHOCK HAZARD  
Do not open the equipment.  
Use the proper fuse.  
Fuse rating is shown on the equipment.  
Use of a wrong fuse can damage the  
equipment.  
Only qualified personnel  
should work inside the  
equipment.  
Do not operate the equipment with wet  
hands.  
Immediately turn off the power at the  
switchboard if water leaks into the  
equipment or something is dropped in  
the equipment.  
Electrical shock can result.  
Continued use of the equipment can cause  
fire or electrical shock. Contact a FURUNO  
agent for service.  
Do not disassemble or modify the  
equipment.  
Fire, electrical shock or serious injury can  
result.  
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.  
Immediately turn off the power at the  
switchboard if the equipment is emitting  
smoke or fire.  
Continued use of the equipment can cause  
fire or electrical shock. Contact a FURUNO  
agent for service.  
Make sure no rain or water splash leaks  
into the equipment.  
Fire or electrical shock can result if water  
leaks in the equipment.  
i
 
WARNING LABEL  
A warning label is attached to all units  
of the system. Do not remove any label.  
If a label is missing or damaged, contact  
a FURUNO agent or dealer about  
replacement.  
CAUTION  
Do not exceed 18 knots with the trans-  
ducer lowered and do not exceed 16  
knots when lowering or raising the  
transducer.  
Name: Warning Label (1)  
WARNING  
Type: 86-003-1011-1  
Code No.: 100-236-231  
The transducer may become damaged.  
To avoid electrical shock, do not  
remove cover. No user-serviceable  
parts inside.  
Turn off the hull unit before using the  
hand crank.  
Bodily injury may result if the power is not  
turned off.  
The zinc block attached near the  
transducer must be replaced yearly.  
The junction between the transducer and  
main shaft may corrode, which can result  
in loss of the transducer or water leakage  
iinside the ship.  
ii  
 
TABLE OF CONTENTS  
FOREWORD............................................................................................................. vi  
SYSTEM CONFIGURATION.................................................................................... vii  
1. OPERATIONAL OVERVIEW .............................................................................1-1  
1.1 Control Unit................................................................................................................1-1  
1.2 Remote Controller (option).........................................................................................1-2  
1.3 Basic Operating Procedure........................................................................................1-3  
1.3.1 Turning on the power .......................................................................................1-3  
1.3.2 Lowering the transducer...................................................................................1-3  
1.3.3 Transmitting .....................................................................................................1-4  
1.3.4 Adjusting backlighting of control unit ................................................................1-5  
1.3.5 Choosing a display mode.................................................................................1-6  
1.3.6 Choosing the display range..............................................................................1-8  
1.3.7 Adjusting the gain ............................................................................................1-9  
1.3.8 Retracting the transducer, turning off the power...............................................1-9  
1.4 Setting the Tilt Angle ................................................................................................1-10  
1.4.1 Automatic tilt on/off.........................................................................................1-10  
1.4.2 Bottom and tilt angle ......................................................................................1-12  
1.4.3 How to discriminate fish echoes from the bottom ...........................................1-12  
1.4.4 Points to consider...........................................................................................1-13  
1.4.5 Tilt angle for surface fish ................................................................................1-13  
1.4.6 Suitable tilt angle............................................................................................1-14  
1.5 Finding Range and Bearing to a Target....................................................................1-14  
1.6 Sonar Menu Overview..............................................................................................1-15  
1.6.1 Operating procedure......................................................................................1-15  
1.6.3 Sonar menu description .................................................................................1-16  
2. FINE TUNING THE SONAR PICTURE....................................................................2-1  
2.1 Eliminating Unwanted Echoes....................................................................................2-1  
2.2 Displaying Surface Fish Clearly .................................................................................2-2  
2.3 Suppressing Bottom Tail ............................................................................................2-2  
2.3.1 AGC.................................................................................................................2-2  
2.3.2 Pulse length.....................................................................................................2-3  
2.3.3 2ND AGC.........................................................................................................2-3  
2.4 Suppressing Bottom and Sea Surface Reflections in Shallow Fishing Grounds .........2-4  
2.5 Rejecting Sonar Interference and Noise.....................................................................2-5  
2.5.1 Identifying noise source ...................................................................................2-5  
2.5.2 Rejecting noise with the interference rejector...................................................2-5  
2.5.3 Rejecting noise with the noise limiter ...............................................................2-5  
2.5.4 Rejecting interference with TX cycle ................................................................2-6  
2.6 Choosing Beamwidth .................................................................................................2-7  
2.6.1 Horizontal beamwidth.......................................................................................2-7  
2.6.2 Vertical beamwidth...........................................................................................2-7  
2.7 Deleting Weak Echoes...............................................................................................2-7  
2.8 Echo Averaging..........................................................................................................2-7  
iii  
 
3. ADVANCED SONAR OPERATION ...................................................................3-1  
3.1 Tracking a Fish School (target lock)........................................................................... 3-1  
3.2 Detecting Fish Schools Aurally .................................................................................. 3-3  
3.3 The Fish Alarm .......................................................................................................... 3-4  
3.4 Measuring Fish School Speed ................................................................................... 3-5  
3.4.1 Entering a fish mark......................................................................................... 3-5  
3.4.2 Deleting individual fish marks .......................................................................... 3-6  
3.5 Relocating Fish School for Easy Observation............................................................ 3-6  
3.6 Event Mark, Own Ship Position Mark......................................................................... 3-7  
3.6.1 Event mark ...................................................................................................... 3-7  
3.6.2 Entering an own ship position mark ................................................................. 3-8  
3.6.3 Deleting an event mark.................................................................................... 3-8  
3.7 Collectively Deleting Marks........................................................................................ 3-9  
3.8 Function Keys (F1-F4)............................................................................................. 3-10  
3.8.1 Operating the function keys ........................................................................... 3-10  
3.8.2 Programming for fishing ground or target fish ................................................ 3-10  
3.8.3 Programming specific function....................................................................... 3-11  
3.8.4 Confirming function key program ................................................................... 3-12  
3.9 Suppressing Effects of Pitching and Rolling (Stabilizer) ........................................... 3-13  
4. ECHOSOUNDER MODE ...................................................................................4-1  
4.1 Choosing the Range.................................................................................................. 4-1  
4.2 Adjusting the Gain ..................................................................................................... 4-2  
4.3 Picture Advance Speed.............................................................................................. 4-3  
4.4 Measuring Depth ....................................................................................................... 4-3  
4.5 Suppressing Interference........................................................................................... 4-4  
4.6 Suppressing Low Level Noise.................................................................................... 4-4  
4.7 Erasing Weak Echoes ............................................................................................... 4-5  
4.8 Other Items on the Sounder Menu............................................................................. 4-6  
5. MARKS AND DATA ...........................................................................................5-1  
5.1 Marks and Data on the Normal Display...................................................................... 5-1  
5.2 Marks and Data on the Echosounder and Audio Displays.......................................... 5-5  
6. INTERPRETING THE DISPLAY ........................................................................6-1  
6.1 Bottom Echo.............................................................................................................. 6-1  
6.2 Fish School................................................................................................................ 6-2  
6.3 Sea Surface Reflections ............................................................................................ 6-3  
6.4 Wake......................................................................................................................... 6-3  
6.5 False Echo by Sidelobe............................................................................................. 6-4  
6.6 Noise and Interference .............................................................................................. 6-4  
7. MARKS AND SYSTEM MENUS........................................................................7-1  
7.1 MARKS Menu............................................................................................................ 7-1  
7.2 SYSTEM Menu.......................................................................................................... 7-3  
iv  
 
8. MAINTENANCE, TROUBLESHOOTING ..........................................................8-1  
8.1 General Maintenance.................................................................................................8-1  
8.2 Cleaning the Equipment.............................................................................................8-1  
8.3 Hull Unit Maintenance................................................................................................8-2  
8.3.1 Lubrication points, zinc plate............................................................................8-2  
8.3.2 Manually raising the transducer .......................................................................8-3  
8.4 Fuse Replacement.....................................................................................................8-4  
8.5 Fan Replacement.......................................................................................................8-4  
8.6 Troubleshooting .........................................................................................................8-5  
8.7 Error Messages..........................................................................................................8-6  
8.8 Diagnostic Tests.........................................................................................................8-7  
8.8.1 Choosing a diagnostic test ...............................................................................8-7  
8.8.2 Description of diagnostic tests..........................................................................8-8  
MENU TREE ........................................................................................................AP-1  
SPECIFICATIONS................................................................................................ SP-1  
INDEX .................................................................................................................. IN-1  
v
 
FOREWORD  
A Word to the Owner of the CSH-5L/CSH-8L  
Congratulations on your choice of the FURUNO CSH-5L/CSH-8L Color Scanning Sonar.  
For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for  
innovative and dependable marine electronics equipment. This dedication to excellence is  
furthered by our extensive global network of agents and dealers.  
Your scanning sonar is designed and constructed to meet the rigorous demands of the  
marine environment. However, no machine can perform its intended function unless  
installed, operated and maintained properly. Please carefully read and follow the  
recommended procedures for operation and maintenance.  
We would appreciate hearing from you, the end-user, about whether we are achieving our  
purposes.  
Thank you for considering and purchasing FURUNO equipment.  
Features  
The FURUNO CSH-5L and CSH-8L Color Scanning Sonars are full-circle electronic  
scanning sonars that detect and instantaneously display fish schools and underwater  
conditions in 16 colors.  
Some of the prominent features of the CSH-5L and CSH-8L are as follows:  
Vivid 16-color display assists in recognition of bottom, and concentration and distribution  
of fish schools.  
Transducer frequency available in 55 kHz or 68 kHz for the CSH-5L and 85 kHz or 107  
kHz for the CSH-8L.  
Various fishing and navigation data (appropriate sensors required) keep operator abreast  
of fishing and navigation conditions.  
High power MOS FET transmitter ensures reliable operation under any condition.  
Remote controller optionally available.  
Four user-programmable function keys for quick set up of equipment according to fishing  
conditions or specific function.  
Target lock feature tracks fish school.  
vi  
 
SYSTEM CONFIGURATION  
Monitor (MU-150C, etc., Max. 2)  
Processor Unit  
CSH-5210  
Control Unit  
CSH-5211  
Transceiver Unit  
CSH-5130  
Navaid  
Current Indicator  
AD Converter  
Speed Log  
E/S Interface  
Remote Controller  
Speaker  
Motion Sensor  
MS-100  
Hull Unit  
CSH-5040, 600 mm stroke  
CSH-5041, 400 mm stroke  
Pre-amplifier Unit  
CSH-5020  
Ship's Mains  
100 VAC/  
115 VAC/  
200 VAC/  
220 VAC/  
240 VAC,  
: Standard Supply  
: Option  
: User Supply  
DC/AC  
Inverter  
TR-2451  
1 , 50-60Hz  
24 VDC  
System configuration of CSH-5L  
vii  
 
Processor Unit  
CSH-5210  
Monitor (MU-150C, etc., Max. 2)  
Control Unit  
CSH-5211  
Transceiver Unit  
CSH-8030  
Navaid  
Current Indicator  
AD Converter  
Speed Log  
E/S Interface  
Remote Controller  
Speaker  
Hull Unit  
CSH-8040, 600 mm stroke  
CSH-8041, 400 mm stroke  
Motion Sensor  
MS-100  
Junction Box  
CSH-1700  
Ship's Mains  
100 VAC/  
115 VAC/  
200 VAC/  
220 VAC/  
240 VAC,  
DC/AC  
Inverter  
TR-2451  
: Standard Supply  
: Option  
: User Supply  
1 , 50-60Hz  
24 VDC  
System configuration of CSH-8L  
viii  
 
1. OPERATIONAL OVERVIEW  
1.1  
Control Unit  
All operations are carried out from the control unit. All controls quickly respond to  
the operator’s command and the associated reaction can be seen on the screen  
almost immediately.  
Trackball  
Lowers the transducer.  
Positions trackball  
mark.  
Raises the transducer.  
Turns power  
on/off.  
Sets transducer  
tilt angle.  
EVENT  
FISH  
POWER  
TARGET  
LOCK  
R/B  
RANGE  
GAIN  
TILT  
FISH  
ALARM  
STABI-  
LIZER  
OFF  
F1  
F3  
F2  
F4  
CENTER  
ALARM  
ZONE  
DELETE  
MARK  
MENU  
Adjusts receiver  
sensitivity; chooses  
menu option.  
FISH:  
EVENT:  
Inscribes fish mark.  
Inscribes event mark.  
TARGET LOCK: Tracks trackball-selected  
position.  
R/B:  
Displays range and  
bearing marks.  
Chooses display  
range; chooses  
menu item.  
FISH ALARM:  
STABILIZER:  
Turns fish alarm on/off.  
Compensates for affects  
of ship's pitching and  
rolling. (Requires Motion  
Sensor MS-100.)  
Execute assigned  
program; register  
function key program.  
OFF CENTER:  
ALARM ZONE:  
Shifts the display.  
Sets fish alarm zone.  
DELETE MARK: Deletes selected mark.  
MENU:  
Opens/closes menu.  
Control unit  
1-1  
 
1. OPERATIONAL OVERVIEW  
1.2  
Remote Controller (option)  
The remote controller provides armchair control of the tilt, range, gain and menu  
functions.  
Hole for hanging  
Remote controller  
1-2  
 
1. OPERATIONAL OVERVIEW  
1.3  
Basic Operating Procedure  
1.3.1  
Turning on the power  
1. Press the POWER switch on the control unit to turn on the power.  
2. Turn on the monitor (user supply).  
The system initiates the START UP test to check itself for proper operation.  
The results are shown as OK or NG (No Good). For any NG, contact your  
dealer for advice. After the test is completed, the last-used display appears.  
START UP TEST  
XX.XX = Program Version No.  
MAIN-0 1050729-XX.XX F F  
ROM  
RAM  
= OK  
= OK  
VRAM = OK  
EEPROM (P.W)  
= OK  
TRX  
1050742-XX.XX 1050733-XX.XX  
ROM  
RAM  
= OK  
= OK  
KEY-0  
1050730-XX.XX F  
ROM  
RAM  
= OK  
= OK  
Self test screen at start up (example: CSH-5L, 55 kHz transducer)  
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.  
1.3.2  
Lowering the transducer  
Set ship’s speed under 16 knots and then press the [] switch. The lamp above  
the switch flashes, and lights when the transducer is fully lowered. If you press  
the [] switch when the speed is over 16 knots and the speed warning is turned  
on in the SYSTEM menu, the message “Max allowable speed for extended  
transducer is 16 kt. Max allowable speed during raising lowering transducer is 16  
kt.” and the audio alarm sounds. Press the [R/B] key to silence the audio alarm.  
CAUTION  
Do not exceed 18 knots with the  
transducer lowered; 16 knots when  
lowering the transducer.  
The transducer may become damaged.  
Note: The audio alarm may be set to sound and a message displayed when the  
ship’s speed goes higher than maximum allowable speed. For further  
details, see SPEED MESSAGE on page 7-4.  
1-3  
 
1. OPERATIONAL OVERVIEW  
1.3.3  
Transmitting  
TRANSMISSION in the SONAR menu is off in the default setting. If it is has  
been set to ON, the procedure below is not necessary. When the transducer is  
lowered, transmission starts and when it is raised transmission is stopped.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR.  
SONAR MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
DISPLAY MODE  
TX OUTPUT  
: SONAR  
: COMBI-1  
: 8  
SOUNDER  
NORM  
MARKS  
SYSTEM  
COMBI-2  
PULSE LENGTH : 8  
TX CYCLE  
TVG NEAR  
TVG FAR  
: 10  
: 6  
: 7  
: 2  
: 1  
: 3  
: 1  
AGC  
2ND AGC  
NOISE LIMITER  
COLOR CURVE  
2
2
3
3
4
4
COLOR RESPONSE : 1  
DELETE COLOR : 0  
ECHO AVERAGE : 1  
INT REJECT  
: 1  
HOR BEAMWIDTH : WIDE  
VER BEAMWIDTH : WIDE  
NARROW  
NARROW  
2
COLOR  
: 1  
3
4
ERASE MARKS  
ALARM LEVEL  
AUTO TRAIN  
TRAIN SECTOR  
AUTO TILT  
: TRACK  
: 9  
SHIP  
EVENT  
FISH  
: ON  
: 10  
: ON  
OFF  
20  
40  
60  
OFF  
4-14  
OFF  
TILT ANGLE  
:
2-10  
6-20  
10-26  
TRANSMISSION : ON  
AUDIO VOLUME : 10  
ASSIGN SETTING : F1 KEY  
ASSIGN MENU : EXECUTE  
F2 KEY  
F3 KEY  
F4 KEY  
PRESS [MENU] KEY TO EXIT  
SONAR menu  
4. Use the [RANGE] control to choose TRANSMISSION.  
5. Use the [GAIN] control to choose ON. The sonar starts transmitting and the  
sonar picture appears.  
6. Press the [MENU] key to close the menu.  
To turn off transmission, choose OFF at step 5. “TX OFF” appears at the top  
right corner of the sonar display when the transmitter is turned off.  
1-4  
 
1. OPERATIONAL OVERVIEW  
1.3.4  
Adjusting backlighting of control unit  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SYSTEM.  
SYSTEM MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
MARKS  
SYSTEM  
DIMMER  
: 10  
DISP SELECT  
HEADING ADJ  
: TEMP  
CURRENT  
:
0
AUTO RETRACT : OFF  
SPEED MESSAGE : ON  
(OFF, 5-16kt)OFF  
OFF  
ON  
EXT KP SYNC  
: OFF  
AUTO TRAIN SPD : LOW  
HIGH  
HIGH  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FEET  
CURRENT  
400  
FATHOMS PA/BRA  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
NAV DATA  
GYRO+NAV  
: 200  
PORT1 BAUDRATE : 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE : 19200  
PORT2 FORMAT : NMEA  
9600  
4800  
2400  
CIF  
9600  
4800  
2400  
CIF  
NAV DATA  
: GPS  
LC  
DR  
ALL  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
LEFT  
ON  
: ENGLISH  
(JAPANESE)  
ESPANOL DANSK  
NEDERLND FRANCAIS  
NORSK  
ITALIANO  
(KOREAN)  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
PANEL  
COLOR  
ECHO-2  
ECHO-1  
ECHO-4  
SET TO DEFAULT : EXECUTE  
PRESS [MENU] KEY TO EXIT  
System menu  
4. Use the [RANGE] control to choose DIMMER.  
5. Operate the [GAIN] control adjust the dimmer. The setting range is 0-10.  
Adjust the control clockwise to increase backlighting; counterclockwise to  
decrease it.  
6. Press the [MENU] key to close the menu.  
1-5  
 
1. OPERATIONAL OVERVIEW  
1.3.5  
Choosing a display mode  
Three display modes are available: NORMAL, COMBI-1 and COMBI-2. To  
choose the display mode, do the following:  
1. Press the [MENU] key to open the menu. The last-used menu is displayed.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] key to choose SONAR.  
4. Use the [RANGE] control to choose DISPLAY MODE.  
5. Use the [GAIN] control to choose desired mode among COMBI-1, NORM  
and COMBI-2.  
6. Press the [MENU] key to close the menu.  
Mode description  
Mode  
NORM  
(Sonar  
Description  
Display  
This mode is useful for detecting  
and tracking fish schools.  
Navigation data can be displayed  
in the text window, with  
connection of appropriate  
sensors.  
Text window  
display)  
Sonar display  
Range and bearing marks  
COMBI-1  
(Sonar +  
Audio)  
Sonar picture appears on the left  
and the audio display at the lower  
right side of the screen. This  
mode is useful analyzing echoes  
in a desired area.  
Text window  
Audio display  
To activate the COMBI-1 mode,  
do the following:  
Sonar display  
1. Choose the COMBI-1 mode.  
2. Use the trackball to place the  
trackball mark (+) on the  
bearing desired.  
3. Press the [R/B] key. The range  
and bearing marks are  
inscribed on the sonar picture,  
and the signal along the  
bearing mark appears in the  
audio display.  
COMBI-2  
(Sonar +  
The sonar picture appears on the  
left and the signal fed from the  
Text window  
echosounder) echosounder at the lower right  
side of the screen. This mode is  
suitable for judging fish school  
concentration.  
Echosounder  
display  
Sonar display  
1-6  
 
1. OPERATIONAL OVERVIEW  
Normal mode display (sonar display)  
N
733  
708  
189  
N
SHIP SPEED 12.4 kt  
R 1000  
T 15  
(15)  
SHIP COURSE 246  
LAT/LON  
B
60S  
G 10.0  
32 52.150N  
132 12.150E  
DEPTH  
126m  
WATER CURRENT  
W
C1 1.2kt 342  
C2 0.8kt 298  
C3 0.4kt 256  
E
Text Window  
For description see  
Chapter 5.  
WATER TEMP 12.4 C  
20min  
10  
0
500  
14  
12  
10  
S
Sonar display  
COMBI-1 display (sonar display + audio display)  
N
517  
500  
134  
SHIP SPEED  
12.4 kt DEPTH 126m  
N
Range &  
Bearing Marks  
R 1000  
T 15  
(15)  
SHIP COURSE 246  
LAT/LON  
32 52.150N  
132 12.150E  
B
60S  
G 10.0  
Text Window  
For description see  
Chapter 5.  
20min 10  
14  
0
WATER TEMP  
12.4 C  
12  
10  
-
0
-
500 -  
Range Scale  
500  
-
S
R 517 B 60S  
1000-  
Range and bearing marks data  
COMBI-1 display (sonar display + audio display)  
1-7  
 
1. OPERATIONAL OVERVIEW  
COMBI-2 display (sonar display + echosounder display)  
N
545  
472  
272  
SHIP SPEED  
12.4 kt DEPTH 126m  
N
R 1000  
T 30  
(30)  
SHIP COURSE 246  
LAT/LON  
32 52.150N  
132 12.150E  
B
60S  
G 10.0  
Text Window  
For description see  
Chapter 5.  
20min 10  
14  
0
WATER TEMP  
12.4 C  
12  
10  
-
-
0
-
Fish School  
Depth Scale  
100 -  
-
500  
Bottom  
200 -  
S
COMBI-2 display (sonar display + echosounder display)  
1.3.6  
Choosing the display range  
The [RANGE] control chooses a display range. Each time the range is changed  
the newly selected range appears in large characters for five seconds at the top  
of the sonar display. The current range is always displayed at the top right corner  
of the sonar display. The ranges (in meters) available are 50, 85, 100, 150, 200,  
250, 300, 350, 400, 450, 500, 600, 800, 1000, 1200 and 1600.  
Surface  
Range displayed  
on screen  
Bottom  
Detection range  
1-8  
 
1. OPERATIONAL OVERVIEW  
1.3.7  
Adjusting the gain  
The [GAIN] control adjusts receiver sensitivity. It should be adjusted to see fish  
echoes clearly with minimal noise on the screen. Too high a setting not only  
causes excessive noise on the screen and makes it difficult to discriminate  
wanted fish echoes but also causes bottom echoes to be painted in strong colors,  
resulting that the echoes from bottom fish are masked by bottom reflections. A  
setting between 3 and 7 is usually suitable. Each time the control is operated the  
newly selected range appears in large characters for five seconds at the top of  
the sonar display. The current range is always displayed at the top right corner of  
the sonar display.  
Gain too low  
Gain too high  
Gain proper  
Examples of proper and improper gain  
1.3.8  
Retracting the transducer, turning off the power  
1. Set speed under 16 knots and then press the [] switch to retract the  
transducer. The lamp above the switch blinks while the transducer is being  
retracted. Transmission is stopped automatically. If you press the [] switch  
when the speed is over 16 knots and the speed warning is turned on in the  
SYSTEM menu, the message “Max allowable speed for extended transducer  
is 16 kt. Max allowable speed during raising lowering transducer is 16 kt.”  
and the audio alarm sounds. Press the [R/B key to silence the audio alarm.  
2. When the lamp above the [] switch lights, meaning the transducer is  
completely retracted, press the [POWER] switch on the control unit to turn off  
the power.  
3. Turn off the monitor.  
Note 1: The transducer is automatically retracted into the tank whenever the  
power switch is turned off. However, for safety purposes, make it a habit  
to retract the transducer before turning off the power.  
Note 2: The equipment can be set to automatically retract the transducer when  
the ship exceeds the operator-set speed. (Speed data required.) The  
transducer may be retracted at a different speed than set if the speed  
data is different from actual speed. In all cases, reduce the speed below  
16 knots and then retract the transducer.  
1-9  
 
1. OPERATIONAL OVERVIEW  
1.4  
Setting the Tilt Angle  
The tilt angle shows the direction to which the sound wave is emitted. When the  
sound wave is emitted horizontally, it is said to be zero (0) degrees and when  
emitted vertically, 90 degrees.  
To set a tilt angle, operate the TILT lever for the desired angle while watching the  
tilt angle indication at the top right corner of the sonar display. Each time the  
lever is operated the newly selected tilt angle is displayed in large characters for  
five seconds at the top of the sonar display. The tilt angle can be set in  
one-degree steps within the range of 0 to 55 degrees.  
0 Horizontal direction (tilt: 0)  
Transducer  
Tilt angle range  
+55  
Tilt range  
1.4.1  
Automatic tilt on/off  
The automatic tilt feature automatically tilts the transducer within the tilt range  
selected on the menu. This feature is useful for finding fish school center.  
Automatic tilt becomes inoperative when the target lock feature is made active.  
Disable the target lock feature to resume automatic tilt.  
1. Press the [MENU] key to open the menu.  
2. Operate the [RANGE] control to choose [MENU MODE] at the top of the  
screen.  
3. Operate the [GAIN] control to choose SONAR.  
4. Operate the [RANGE] control to choose AUTO TILT.  
5. Operate the [GAIN] control to choose ON.  
6. Operate the [RANGE] control to choose TILT ANGLE.  
7. Use the [GAIN] control to choose a tilt range among ±2-10°, ±4-14°, ±6-20°,  
and ±10-26°. See the table on the next page for range and tilt angle.  
8. Press the [MENU] key to close the menu. When auto tilt is on, auto tilting  
begins with the range selected (at step 7), centered on the tilt angle set with  
the TILT lever.  
To turn off automatic tilt, choose OFF at step 5. Note that automatic tilt range  
varies with the range in use.  
1-10  
 
1. OPERATIONAL OVERVIEW  
Range and tilt angle  
Range (m)  
±2-10°  
±4-14°  
±14°  
±12°  
±10°  
±4°  
±6-20°  
±20°  
±16°  
±14°  
±6°  
±10-26°  
±26°  
50, 85, 100, 150, 200, 250, 300, 350  
400, 450, 500  
±10°  
±8°  
±6°  
±2°  
±20°  
600, 800  
±20°  
1000, 1200, 1600  
±10°  
For example, when the [RANGE] control, [TILT] lever and automatic tilt are set to  
1000 m, 8 and ±2-10° respectively, the tilt angle changes at each transmission  
as follows:  
°
8° → 10° →  
8° →  
6
° →  
8° → ...  
Tilt Angle  
Auto tilt concept  
1-11  
 
1. OPERATIONAL OVERVIEW  
1.4.2  
Bottom and tilt angle  
Finding the proper tilt angle is of utmost importance when searching for fish,  
especially in coastal water fishing, where the depth of the fishing ground is from  
50-100 m. In this type of fishing ground it is imperative that the bottom echo be  
always displayed to properly distinguish between fish and the bottom. When  
selecting a tilt angle, keep the following points in mind.  
Case 1: Tilt angle 30 to 40 degrees  
This tilt angle uses the full beamwidth to receive echoes, thus the entire bottom  
echo is displayed. Fish echoes may be hidden in the bottom echo.  
Case 2: Tilt angle 10 to 20 degrees  
This tilt angle receives bottom echoes within the bottom half of the beam. Fish  
echoes astern of the bottom echo are displayed.  
Case 3: Tilt angle 0 to 5 degrees  
This tilt angle may or may not display returning echoes. Fish echoes near the  
bottom echo are displayed.  
1.4.3  
How to discriminate fish echoes from the bottom  
The following figure illustrates how two fish schools (a) and (b) are displayed on  
screen using three different tilt angles.  
Case 1: Tilt angle 30 to 40 degrees  
Fish school is obscured by the bottom echo.  
Case 2: Tilt angle 10 to 20 degrees  
Fish school is located above the bottom echo (midwater).  
Case 3: Tilt angle 0 to 5 degrees  
Fish school is located close to the bottom echo.  
Case 1  
Case 2  
Case 3  
b
a
a
a
Fish school (a)  
Bottom  
Fish school (a)  
Bottom  
Fish school (a)  
Bottom  
(b)  
Case 1  
Case 2  
Case 3  
How to discriminate fish echoes from bottom  
1-12  
 
1. OPERATIONAL OVERVIEW  
1.4.4  
Points to consider  
As a general rule of thumb, a vertically distributed fish school is a better sonar  
target than a horizontally one, since it reflects the transmitted pulse back  
toward to the source.  
In case 3, both fish schools (a) and (b) are presented. Generally speaking,  
however, midwater fish schools tend to be larger than bottom fish schools and  
they are often displayed near the bottom on the sonar screen.  
Detection of bottom fish is difficult if they are not distributed vertically.  
1.4.5  
Tilt angle for surface fish  
Sound emitted from the sonar transducer forms a circle-shaped beam with a  
width of approximately 15°* (-6dB in the vertical direction). The tilt angle is  
indicated by the angle between the center line of the beam and the horizontal  
plane. Then, if the tilt angle is set to 0 degrees, the center line is parallel with the  
sea surface and one half of the emitted sound goes upward toward the sea  
surface.  
This causes a half of the emitted sound to be reflected back toward the  
transducer and displayed on the screen as sea surface reflections. When the  
sea is calm, since the sound is reflected just like a light hitting a mirror at a  
narrow incident angle, it propagates away and the sea surface reflections  
become negligible.  
However if the sea is not calm enough, they will become dominant and will  
interfere with observation of wanted echoes. To minimize these sea surface  
reflections and to search surface fish schools effectively, the tilt angle is usually  
set to 5-6 degrees so that the upper portion of the beam becomes almost  
parallel with the sea surface. When the sea is rough, it is often set to a little  
larger angle.  
* 15° for CSH-5L, 13° for CSH-8L  
Sea surface  
Tilt angle 0°  
15°  
Sea surface  
Tilt angle 5-6°  
15°  
Tilt angle and surface fish (example: CSH-5L)  
1-13  
 
1. OPERATIONAL OVERVIEW  
1.4.6  
Suitable tilt angle  
The table below shows the estimated detection range for tilt angles of 0, 5, 10  
and 15 degrees. Refer to the table to find suitable tilt angle from depth and  
detection range.  
Detection range (m)  
Tilt angle setting  
400  
(800)  
100  
(200)  
200  
(400)  
300  
(600)  
0°  
20(40)  
5°  
40(80)  
60(120)  
10°  
15°  
80(160)  
100(200)  
200(400)  
300 m  
Vertical width of sonar beam  
200 m  
100 m  
78 m  
CSH-5L  
52 m  
15°  
26 m  
300 m  
200 m  
100 m  
23 m  
68 m  
CSH-8L  
46 m  
13°  
Depth, detection range and tilt angle  
1.5  
Finding Range and Bearing to a Target  
Operate the trackball to place the trackball mark on the target you want to  
measure the range and bearing. The slant range, horizontal range, bearing and  
depth to the target appear at the upper left corner of the sonar display.  
TRACKBALL DATA  
B
Slant range from own ship to trackball mark  
Trackball mark  
Horizontal range from own ship to trackball mark  
Depth to trackball mark  
B Relative from own ship to trackball mark*  
Own ship mark  
* = Relative bearing format may be selected with  
OTHER MARKS on the MARKS menu.  
Location of trackball data  
1-14  
 
1. OPERATIONAL OVERVIEW  
1.6  
Sonar Menu Overview  
This equipment has four menus: sonar menu, sounder menu, marks menu and  
system menu. Of the four menus, the SONAR menu is the one you will use most  
often.  
Note that the gain and range cannot be adjusted while the menu is displayed.  
1.6.1  
Operating procedure  
1. Press the [MENU] key. The last-used menu appears.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
SONAR MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
DISPLAY MODE  
TX OUTPUT  
: SONAR  
: COMBI-1  
: 8  
SOUNDER  
NORM  
MARKS  
SYSTEM  
COMBI-2  
PULSE LENGTH : 8  
TX CYCLE  
TVG NEAR  
TVG FAR  
: 10  
: 6  
: 7  
: 2  
: 1  
: 3  
: 1  
AGC  
2ND AGC  
NOISE LIMITER  
COLOR CURVE  
2
2
3
3
4
4
COLOR RESPONSE : 1  
DELETE COLOR : 0  
ECHO AVERAGE : 1  
INT REJECT  
: 1  
HOR BEAMWIDTH : WIDE  
VER BEAMWIDTH : WIDE  
NARROW  
NARROW  
2
COLOR  
: 1  
3
4
ERASE MARKS  
ALARM LEVEL  
AUTO TRAIN  
TRAIN SECTOR  
AUTO TILT  
: TRACK  
: 9  
SHIP  
EVENT  
FISH  
: ON  
: 10  
: ON  
OFF  
20  
40  
60  
OFF  
4-14  
OFF  
TILT ANGLE  
:
2-10  
6-20  
10-26  
TRANSMISSION : ON  
AUDIO VOLUME : 10  
ASSIGN SETTING : F1 KEY  
ASSIGN MENU : EXECUTE  
F2 KEY  
F3 KEY  
F4 KEY  
PRESS [MENU] KEY TO EXIT  
Sonar menu  
1-15  
 
1. OPERATIONAL OVERVIEW  
4. Use the [RANGE] control to choose a menu item. The selected item is  
highlighted.  
Note: Items displayed in red are locked to prevent accidental change of  
setting. When any of those items are selected the display shown  
below appears, to ask you if you are sure to change the setting. To  
change the setting, use the [GAIN] control to choose YES and then  
press the [EVENT] key. The items colored in red turn green to show  
that they are available for adjustment.  
SELECTED MENU IS LOCKED  
ARE YOU SURE TO CHANGE?  
NO  
YES  
PRESS [EVENT] KEY TO EXECUTE  
5. Use the [GAIN] control to choose the option desired.  
6. To close the menu, press the [MENU] key.  
1.6.3  
Sonar menu description  
Description of sonar menu  
Item  
Description  
Ref. page  
DISPLAY MODE Chooses the display mode among, COMBI-1  
(NORM + Audio), NORM (Sonar) and  
1-6  
COMBI-2 (NORM + Echosounder).  
TX OUTPUT  
Adjusts transmitter power.  
2-4  
2-3  
2-6  
PULSE LENGTH Chooses pulse length.  
TX CYCLE  
Removes interference caused by other sonars  
operating nearby.  
TVG NEAR  
TVG FAR  
AGC  
Adjusts receiving gain within 300 m.  
Adjusts receiver gain beyond 300 m.  
Automatically reduces the receiver gain only  
2-1  
2-1  
2-2  
against strong echoes such as the bottom or a  
large fish school, to suppress bottom tail.  
2ND AGC  
Suppresses bottom echo.  
2-3  
2-5  
NOISE LIMITER Suppresses unwanted reflections caused by  
sediments in water, plankton or ship’s noise.  
COLOR CURVE Adjusts echo presentation color curve against  
strong reflections. In setting “1,” for example,  
weak to strong signals are averaged and  
displayed to obtain a balanced picture. The larger  
the setting the better the resolution on weak  
signals.  
1-16  
 
1. OPERATIONAL OVERVIEW  
Description of sonar menu (con’t from previous page)  
Item  
COLOR  
RESPONSE  
Description  
Ref. page  
Adjusts color level against strong reflections. The  
higher the setting, the more the red color is  
displayed and weak level colors are displayed as is,  
thereby giving the appearance that the gain has  
been raised.  
DELETE  
COLOR  
Erases desired echo level from the display.  
2-7  
2-7  
2-5  
2-7  
2-7  
ECHO  
AVERAGE  
Specifies how long to leave afterglow on the screen.  
INT REJECT  
Rejects random noise and sea surface reflections in  
rough sea conditions.  
HOR  
BEAMWIDTH  
Sets horizontal beamwidth for wide or narrow.  
VER  
BEAMWIDTH  
Sets vertical beamwidth for wide or narrow.  
COLOR  
Chooses display colors for the sonar and audio  
displays, among four choices. Choose a display  
color to match your environment or fishing objective.  
ERASE MARKS Chooses the mark type to erase collectively, from  
track, own ship, event and fish. For track, 10% of  
the oldest track is erased.  
3-9  
3-4  
ALARM LEVEL  
Sets echo strength level which triggers the fish  
alarm. The lower the setting the weaker the echo  
which triggers the alarm.  
AUTO TRAIN  
Turns automatic transducer training on or off.  
3-3  
3-3  
TRAIN SECTOR Chooses train sector in automatic training.  
AUTO TILT  
Turns automatic tilt on or off.  
Sets automatic tilt range.  
1-10  
1-10  
1-4  
TILT ANGLE  
TRANSMISSION Turns transmission on or off.  
AUDIO  
Sets audio volume of loudspeaker.  
3-3  
VOLUME  
ASSIGN  
SETTING  
Chooses function key to program.  
3-10  
3-12  
ASSIGN MENU  
Displays programs assigned to function keys.  
1-17  
 
1. OPERATIONAL OVERVIEW  
(This page intentionally left blank.)  
1-18  
 
2. FINE TUNING THE SONAR PICTURE  
2.1  
Eliminating Unwanted Echoes  
Echoes from targets such as bottom and fish return to the transducer in order of  
distance to them, and when we compare their intensities at the transducer face,  
those from nearer targets are generally stronger when their reflecting properties  
are nearly equal. The sonar operator will be quite inconvenienced if these  
echoes are directly displayed on the screen, since the actual size of the target  
cannot be judged from the size of echoes displayed on the screen. To overcome  
this inconvenience, the TVG function is incorporated. It compensates for  
propagation loss of sound in water; amplification of echoes on short rang is  
suppressed and gradually increased as range increases so that similar targets  
are displayed in the similar intensities irrespective of the ranges to them.  
The CSH-5L/CSH-8L incorporates two TVG functions, NEAR and FAR, and they  
mainly compensate for propagation loss on short and long ranges respectively,  
centered at the ranges shown below.  
NEAR  
How TVG works  
The TVG is also used to suppress unwanted echoes and noise which appear in  
a certain range area on the screen such as sea surface reflections and cruising  
noise. To obtain the proper TVG setting, follow the procedure below.  
1. Press the MENU key.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose TVG NEAR.  
5. Use the [GAIN] control to adjust gain.  
6. Use the [RANGE] control to choose TVG FAR.  
7. Use the [GAIN] control to adjust TVG FAR (setting range: 0-10).  
8. When sea surface reflections or plankton layers disturb the picture, adjust  
TVG NEAR to eliminate them. They will be eliminated by decreasing the  
setting by “1” or “2.”  
2-1  
 
2. FINE TUNING THE SONAR PICTURE  
8. On a long range, locate a fish school which is approaching own ship. Note  
that the tilt should be kept adjusted so that the fish school is always placed in  
the center of the sonar beam, i.e., so that the fish school is displayed in  
strongest colors possible. Check that the fish echo is displayed in the same  
color while it approaches. If the color changes suddenly to weaker colors as  
the fish echo enters FAR and NEAR areas, the TVG is improperly set. Adjust  
the TVG to correct it. If this again produces sea surface reflections and noise,  
try to remove them with the AGC and noise limiter as described later on.  
9. Press the [MENU] key to close the menu.  
2.2  
Displaying Surface Fish Clearly  
When you are searching for surface fish with the tilt set to a narrow angle, sea  
surface reflections may disturb or mask wanted fish echoes. In this case, in  
addition to the TVG adjustment described earlier, adjust AGC on the SONAR  
menu. Normally set it between “0” and “3.”  
2.3  
Suppressing Bottom Tail  
As noted earlier, fish schools (echoes) located near the bottom are sometimes  
difficult to detect because you have to discriminate them from the bottom  
reflections. AGC, PULSE LENGTH and 2ND AGC in the SONAR menu, if used  
properly, decrease the tail of bottom reflections, making it easier to discriminate  
bottom fish.  
2.3.1  
AGC  
The AGC functions to automatically reduce the receiver gain only against strong  
echoes such as the bottom or a large fish school. Since weak echoes remain  
unaffected, a small fish school becomes easier to detect. Adjust the AGC so it  
works only on bottom reflections.  
1. Press the MENU key.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose AGC.  
5. Use the [GAIN] control to set AGC value. The setting range is 0-10 and the  
higher the setting the stronger the AGC effect.  
6. Press the [MENU] key to close the menu.  
2-2  
 
2.3.2  
Pulse length  
The pulse length control determines the length of the transmission pulse emitted  
into the water. While a longer pulse is advantageous for long-range sounding, it  
has the disadvantage of being poor in discrimination of targets, i.e., ability to  
separate several closely located targets. When searching bottom fish, therefore,  
it is useful to shorten the pulselength in order to separate fish echoes from  
bottom reflections. For search of surface and midwater fish in which bottom  
reflections are not so strong, the longest pulse length “10” should be used.  
1. Press the MENU key.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose PULSE LENGTH.  
5. Use the [GAIN] control to set pulse length. The setting range is 0-10 and the  
higher the setting the longer the pulse length.  
6. Press the [MENU] key to close the menu.  
2.3.3  
2ND AGC  
While it is ideal to suppress bottom echoes with the AGC alone there are some  
fishing grounds where this is not possible. (The high power sonar has the  
advantage of long-range detection but this can also be a disadvantage, since  
weaker echoes may be hidden in strong, unwanted echoes such as the bottom.)  
If you cannot suppress bottom echoes or sea surface reflections by the AGC  
function alone, use the 2ND AGC feature. Normally a setting of 1 or 2 is suitable.  
For especially strong echoes, use a setting of 3 or 4.  
1. Press the MENU key. The last-used menu appears.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose 2ND AGC.  
5. The 2ND AGC setting is locked so use the [GAIN] control to choose YES and  
then press the [EVENT] key.  
6. Use the [GAIN] control to set 2ND AGC. The setting range is 0-10 and the  
higher the setting the greater the 2ND AGC effect.  
7. Press the [MENU] key to close the menu.  
2-3  
 
2. FINE TUNING THE SONAR PICTURE  
2.4  
Suppressing Bottom and Sea Surface  
Reflections in Shallow Fishing Grounds  
In shallow fishing grounds with hard or rocky bottom, bottom reflections often  
interfere with wanted fish echoes and they can not be eliminated sufficiently with  
the aforementioned TVG and AGC, especially when the tilt angle is large in  
order to track fish schools approaching within 400 m. In such cases try to reduce  
the output power without turning down the gain. The picture becomes clearer  
when the output power is reduced rather than when the gain is decreased as  
illustrated below.  
1. Press the MENU key. The last-used menu appears.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose TX OUTPUT.  
5. Use the [GAIN] control to set TX output. The higher the setting (setting range:  
0-10) the greater the TX power.  
6. Press the [MENU] key to close the menu.  
For long-range detection, set TX OUTPUT to 10.  
Bottom echo masks  
Fish echo  
fish echo.  
weakened  
Improper  
TVG and AGC  
adjusted, OUTPUT  
high.  
Fish echo  
OUTPUT decreased,  
gain maintainted  
Proper  
How to adjust TX output  
2-4  
 
2. FINE TUNING THE SONAR PICTURE  
2.5  
Rejecting Sonar Interference and Noise  
While observing the sonar picture, you may encounter occasional or intermittent  
noise and interference. These are mostly caused by on-board electronic  
equipment, engine or propeller noise, or electrical noise from other sonars being  
operated nearby.  
2.5.1  
Identifying noise source  
To eliminate noise effectively, you should first identify the noise source.  
Turn off “TRANSMISSION” in the SONAR menu to stop transmission and  
operate all on board equipment one by one while observing the picture.  
Run the boat at various speeds to check if the noise is speed dependent.  
If neither of the above two steps affects on the picture, adjust the INT REJECT  
(Interference Rejector), NOISE LIMITER or TX CYCLE on the SONAR menu as  
appropriate.  
2.5.2  
Rejecting noise with the interference rejector  
This control is similar to the interference rejector on echo sounders and radars. It  
is effective for rejecting random noise and sea surface reflections in rough sea  
conditions. Set the interference rejector so that noise is just eliminated. Do not  
use an unnecessarily high setting since small wanted echoes may also be  
rejected.  
1. Press the MENU key.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose INT REJECT.  
5. Use the [GAIN] control to set interference rejection level, from 0 (OFF) to 3  
(highest degree of suppression).  
6. Press the [MENU] key to close the menu.  
2.5.3  
Rejecting noise with the noise limiter  
Weak, unwanted reflections, colored light blue or green, are displayed when  
water is contaminated or plankton layers exist or due to ship’s noise.  
1. Press the MENU key. The last-used menu appears.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose NOISE LIMITER.  
5. Use the [GAIN] control to set noise limiter level. The setting range is 0-10 and  
the higher the figure the greater the degree of suppression.  
6. Press the [MENU] key to close the menu.  
2-5  
 
2. FINE TUNING THE SONAR PICTURE  
2.5.4  
Rejecting interference with TX cycle  
When other sonars of the same TX frequency as own sonar are near, an  
interference ring caused may be displayed. To erase the interference ring from  
the screen, reduce the TX CYCLE setting.  
Interference  
Tx cycle high  
Tx cycle lowered  
Interference rings  
1. Press the MENU key.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR to display the SONAR menu.  
4. Use the [RANGE] control to choose TX CYCLE.  
5. Use the [GAIN] control to set TX cycle. The setting range is 0-10 and the  
higher the figure the longer the TX cycle.  
6. Press the [MENU] key to close the menu.  
Note: When the sonar is used in shallow waters with the range set between 100  
m and 200 m and the TX cycle at “10”, a previously reflected echo may  
appear at close range. In this case reduce the TX cycle to “7 or 8” to  
reject it.  
2-6  
 
2. FINE TUNING THE SONAR PICTURE  
2.6  
Choosing Beamwidth  
2.6.1  
Horizontal beamwidth  
If you wish to have better bearing discrimination (ability to distinguish two closely  
located targets at the same range and different bearings) for fish schools and  
also wish to examine the contour of bottom, set HOR BEAMWIDTH to NARROW,  
on the SONAR menu.  
2.6.2  
Vertical beamwidth  
For better bearing discrimination in the vertical direction, set VER BEAMWIDTH  
to NARROW, on the SONAR menu.  
2.7  
Deleting Weak Echoes  
You can remove weak echoes to clear the picture. Echoes are deleted by  
strength so this feature is useful for observing only large fish schools or  
suppressing interference.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR.  
4. Use the [RANGE] control to choose DELETE COLOR.  
5. Use the [GAIN] control to choose setting. The setting range is 0-10 and the  
higher the number the stronger the echo that will be erased.  
6. Press the [MENU] key to close the menu.  
2.8  
Echo Averaging  
You may adjust echo afterglow to follow echo movement. The higher the setting  
the longer the afterglow remains on the screen.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR.  
4. Use the [RANGE] control to choose ECHO AVERAGE.  
5. Use the [GAIN] control to choose setting. The setting range is 0 (OFF) to 3  
and the higher the setting the longer echoes remain on the screen.  
6. Press the [MENU] key to close the menu.  
2-7  
 
2. FINE TUNING THE SONAR PICTURE  
(This page intentionally left blank.)  
2-8  
 
3. ADVANCED SONAR OPERATION  
3.1  
Tracking a Fish School (target lock)  
Target lock, which requires speed and heading inputs, automatically tracks a  
fixed location (such as a reef) so that you won’t lose sight of it on the display  
screen.  
1. On the sonar display, operate the trackball to place the trackball mark on the  
location you want to track.  
2. Press the [TARGET LOCK] key.  
The target lock mark appears ( ) on the echo selected and the bearing  
mark bisects the echo. Horizontal range, depth and bearing to the target  
appear at the bottom right hand corner of the sonar display. Note that target  
lock is automatically cancelled when the echo moves 1.5 times the range in  
use.  
Target Lock Mark  
Target lock  
bearing mark  
Target Lock Data  
650 (Horizontal range from own ship to target)  
153 (Depth of target)  
NNE (Relative bearing to target*)  
B
* Relative bearing format may be selected with  
OTHER MARKS on the MARKS menu.  
** Any value which exceeds 9999 is displayed  
with four asterisks (****).  
Target lock mark and target lock data  
3. To cancel target lock and erase the target lock mark and bearing mark, press  
the [TARGET LOCK] key again.  
Note 1: If automatic tilt is active it is automatically cancelled. It is resumed once  
target lock is disabled.  
Note 2: Target lock feature is cancelled when the position selected is more than  
1.5 times the range.  
3-1  
 
3. ADVANCED SONAR OPERATION  
Note 3: The target lock feature tracks a target up to 55° tilt angle. For example, if  
a ship moves from position A to position D, the target lock works  
between positions A and B. The tilt angle is fixed between positions B  
and C is 55°, however calculation continues internally. Target lock is  
restarted after position C.  
A
B
C
D
5555゜  
Depth  
Target lock and tilt angle  
3-2  
 
3.2  
Detecting Fish Schools Aurally  
Sometimes you may be preoccupied with other tasks and unable to concentrate  
on watching the sonar picture. In such cases it would be a good choice to use  
the audio function. This function enables you to monitor echoes from fish  
schools and bottom through the built-in speaker.  
After you’ve become accustomed to monitoring fish aurally, you should be able  
to detect a fish school from a range longer than you can detect it on the screen.  
In addition you may judge whether the fish school is approaching or going away;  
the tone becomes higher when the school is approaching and lower when the  
school is going away.  
1. Operate the trackball to place the trackball mark on the direction you want to  
monitor through the speaker. (If the trackball mark is placed on the own ship  
mark when the [R/B] key is pressed, the range and bearing marks and range  
and bearing marks data are erased.)  
2. Press the [R/B] key. The bearing mark appears on the bearing selected with  
the trackball mark. Listen to echoes through the loudspeaker. You may adjust  
the volume of the loudspeaker with AUDIO VOLUME on the SONAR menu.  
3. To change aural coverage area, do the following:  
a)Press the [MENU] key to open the menu.  
b)Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
c) Use the [GAIN] control to choose SONAR.  
d)Use the [RANGE] control to choose AUTO TRAIN.  
e)Use the [GAIN] control to choose ON.  
f) Use the [RANGE] control to choose TRAIN SECTOR.  
g)Use the [GAIN] control to choose train sector among ±10°, ±20°, ±40° and  
±60°.  
Train Sector  
Bearing Mark  
Range Mark  
R 400 B 45S*  
Range and bearing marks data  
* = Relative bearing format may be chosen  
with OTHER MARKS in the MARKS menu.  
h)Press the [MENU] key to close the menu. Then, automatic training starts,  
centered on the bearing mark.  
To turn off automatic training, choose OFF at step e).  
3-3  
 
3. ADVANCED SONAR OPERATION  
3.3  
The Fish Alarm  
The fish alarm generates an audio alarm when a fish echo above a certain  
strength enters the alarm zone.  
1. Operate the trackball to place the trackball mark on the starting point of the  
alarm zone.  
2. Press the [ALARM ZONE] key.  
3. Operate the trackball to place the trackball mark on the ending point of the  
alarm zone.  
4. Press the [ALARM ZONE] key.  
The display paints a fan-shaped alarm zone. The audio alarm will be  
released when an echo enters the alarm zone.  
Starting Point  
Alarm Area  
Ending Point  
Fish alarm zone  
Note 1: There must be at least three degrees difference between the starting  
and end points to get a fan-shaped alarm zone as shown in (a) and (b)  
below. Otherwise, a 360° alarm zone is painted as in (c) and (d).  
More than 3˚  
Within 3˚  
(a)  
(b)  
(c)  
(d)  
Fish alarm zones  
Note 2: You may set the echo strength level which will release the audio alarm  
with ALARM LEVEL on the SONAR menu. The setting range is 0-14.  
Note 3: To show or erase the alarm zone, press the [FISH ALARM] key.  
3-4  
 
3. ADVANCED SONAR OPERATION  
3.4  
Measuring Fish School Speed  
To ensure a good haul, it is important to estimate the direction and speed of the  
fish school before shooting the net. You can do this with the [FISH] key. If the  
tidal current data is used together with fish speed data, you can determine the  
timing of the net shooting more efficiently. This function requires speed and  
heading inputs.  
3.4.1  
Entering a fish mark  
1. Place the trackball mark on the center of a fish school, and then press the  
[FISH] key. The latest fish mark ( ) appears on the fish school.  
2. Wait 1 to 2 minutes.  
3. Place the trackball mark on the same fish school selected at step 1, and then  
press the [FISH] key.  
The latest fish mark ( ) appears on the target and the 2nd latest fish mark  
( ) appears on the location selected at step 1. In addition, the range  
between the two fish marks, horizontal range from own ship to the latest fish  
mark and the speed and course of the fish school are shown at the bottom  
right corner of the sonar display.  
Past Fish Mark (Max. 8)  
Latest  
2nd Latest Fish Mark  
Fish Mark  
Latest  
Fish Mark  
Wait 1-2  
minutes  
X
FIsh Mark Data  
1076 (Horizontal range between fish marks)  
Place trackball mark  
on fish echo’s latest  
location and press the  
[FISH] key.  
Place trackball mark on  
fish echo and press the  
[FISH] key.  
787 (Horizontal range from own ship to fish mark)  
153 (Depth)  
2.3kt (Speed)  
E/S (Course*)  
S
C
* Course display format may be selected with  
EVENT/FISH on the MARKS menu.  
** Any value which exceeds 9999 is displayed  
with four asterisks (****).  
Fish mark and fish mark data  
Note 1: Movement is calculated using ship’s speed and heading. Accordingly,  
pitching and rolling may affect the calculation. For more accurate  
measurement, repeat the procedure two or three times to verify  
reliability of the data.  
Note 2: The time and distance between pressings of the [FISH] key should be  
as long as possible to increase accuracy of measurement. For more  
accurate measurement, repeat the procedure two or three times.  
3-5  
 
3. ADVANCED SONAR OPERATION  
Note 3: Each time the [FISH] key is pressed the fish mark changes in the  
sequence shown below. Maximum 10 fish marks may be inscribed, one  
latest, one 2nd latest and eight past.  
Fish key pressed once:  
Fish key pressed twice:  
Fish key pressed three times:  
X
Fish key pressed four times:  
X
X
3.4.2  
Deleting individual fish marks  
To delete specific fish marks, use the [DELETE MARK] key as shown below. To  
delete fish marks collectively, see paragraph 3.7.  
1. Operate the trackball to place the trackball mark on the fish mark you want to  
delete. The color of the fish mark changes from white to red if the trackball  
mark is correctly placed.  
2. Press the [DELETE MARK] key to delete the fish mark.  
3.5  
Relocating Fish School for Easy Observation  
1. Operate the trackball to place the trackball mark on the position where you  
want to relocate the own ship mark.  
2. Press the [OFF CENTER] key.  
3. To return the own ship mark back to the screen center, press the [OFF  
CENTER] key again.  
Fish School  
Fish School  
Press  
[OFF CENTER]  
key.  
Own Ship  
Trackball  
Mark  
Mark  
How to use the off-center function  
3-6  
 
3. ADVANCED SONAR OPERATION  
3.6  
Event Mark, Own Ship Position Mark  
3.6.1  
Event mark  
The event mark, which requires speed and heading data, is useful for finding the  
horizontal range, depth and bearing to a location some distance from current  
position.  
Plotting an event mark on the display is equivalent to dropping a buoy with an  
anchoring chain that extends from surface to bottom. The buoy is fixed at its  
present geographical location, but the mark on the display moves to a point  
where present beam plane intersects the anchor chain of the buoy as the ship  
moves or the tilt angle is changed. This can be said of other marks as well such  
as fish mark and trackball mark.  
(35)  
Stored when  
EVENT key is  
pressed.  
B
You observe picture from  
direction of mark.  
A
How to use the event mark  
Entering an event mark  
1. Operate the trackball to place the trackball mark where you want to place an  
event mark (latest event mark).  
2. Press the [EVENT] key. The horizontal range, depth and bearing to the event  
mark appear at the bottom left corner of the sonar display.  
Event mark position is calculated from ship’s speed and heading data and it  
moves on the screen with own ship’s movement. With connection of a  
navigator, the latitude and longitude of the event mark are output to the  
navigator when an event mark is entered, in NMEA format TLL sentence.  
234 : Horizontal range (m) from own ship mark to mark  
121  
: Depth (m) to mark  
( 121) : Depth (m) of mark at moment EVENT key is pressed.  
B SW/W : Bearing (degree)*  
*
Bearing format may be selected with  
EVENT/FISH on the MARKS menu.  
** Any value which exceeds 9999 is displayed  
with four asterisks (****).  
Event mark data, shown at bottom left corner of the display  
3-7  
 
3. ADVANCED SONAR OPERATION  
Each time the key is pressed the appearance of the event marks changes as  
below. Ten marks may be entered. When this amount is exceeded the oldest  
event mark is automatically erased.  
This data is used to display latest  
event mark data.  
First press of the [EVENT] key  
2nd press of the [EVENT] key  
3rd press of the [EVENT] key  
2
3
1
2
4th press of the [EVENT] key  
1
Past Event Mark  
Latest Event Mark  
Event marks  
3.6.2  
3.6.3  
Entering an own ship position mark  
Operate the trackball to place the trackball mark on the own ship mark and press  
the [EVENT] key to inscribe an own ship position mark. 10 own ship position  
marks ( ) may be entered. When this amount is exceeded the oldest own ship  
position mark is automatically erased.  
Deleting an event mark  
You may delete specific event mark as follows:  
1. Operate the trackball to place the trackball mark on the event mark or own  
ship position mark you want to delete. The color of the mark changes from  
white to red if the trackball mark is correctly placed.  
2. Press the [DELETE MARK] key to delete the mark.  
3-8  
 
3. ADVANCED SONAR OPERATION  
3.7  
Collectively Deleting Marks  
You may collectively delete track, event marks or fish marks as shown below.  
Own ship position mark may be also be deleted, one by one.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SONAR.  
4. Use the [RANGE] control to choose ERASE MARKS.  
5. Use the [GAIN] control to choose item to delete: TRACK, SHIP, EVENT or  
FISH.  
TRACK:  
The oldest 10% of the ship’s track is erased with each press  
of the [EVENT] key.  
SHIP:  
The oldest own ship mark is deleted with each press of the  
[EVENT] key.  
EVENT, FISH: All corresponding marks are erased when the [EVENT] key  
is pressed.  
6. Press the [EVENT] key to delete all of the mark type selected at step 5.  
7. Press the [MENU] key to close the menu.  
3-9  
 
3. ADVANCED SONAR OPERATION  
3.8  
Function Keys (F1-F4)  
A function key may be programmed two ways: set up the equipment according to  
fishing ground or target fish, or provide a shortcut for a menu item on the  
SONAR or SOUNDER menu.  
Default function key programs (main items only)  
Function Key  
Default program  
Sonar Menu Item  
F1  
8
F2  
10  
10  
10  
5
F3  
8
F4  
10  
10  
10  
5
F1: Short-range detection  
F2: Long-range detection  
F3: Short-range detection  
F4: Long-range detection  
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
7
7
10  
6
10  
6
TVG NEAR  
TVG FAR  
6
8
6
8
HOR BEAMWIDTH  
VER BEAMWIDTH  
COLOR CURVE  
COLOR RESPONSE  
Narrow Narrow Narrow Narrow  
Wide  
Narrow  
Wide  
Narrow  
4
2
1
4
4
2
1
4
3.8.1  
Operating the function keys  
1. Press desired function key. The equipment is set according to function key  
program, or a dialog box appears in case of shortcut operation. For shortcut  
operation, go to step 2. The illustration below shows the ERASE MARKS  
dialog box.  
2. Press the same function key again within five seconds to set value or choose  
option. (Be sure to press the function key within five seconds; the dialog box  
is automatically erased after five seconds.) In case of the SONAR menu item  
ERASE MARKS use the function key to choose the item to erase and then  
press the [EVENT] key to erase.  
ERASE MARKS  
TRACK SHIP EVENT SHIP  
ERASE MARKS dialog box  
3.8.2  
Programming for fishing ground or target fish  
1. Set up controls on the control unit according to fishing ground or target fish.  
2. Press the [MENU] key to open the menu.  
3. Use the [RANGE] control to choose [MENU MODE].  
4. Use the [GAIN] control to choose SONAR.  
5. Set all menu items (except TRANSMISSION) as appropriate.  
6. Use the [RANGE] control to choose ASSIGN SETTING.  
3-10  
 
3. ADVANCED SONAR OPERATION  
7. Use the [GAIN] control to choose the function key (F1-F4) you want to  
program.  
8. Press the [EVENT] key to program the function key selected at step 7.  
9. Press the [MENU] key to close the menu.  
Useful programs (main items only)  
For detecting surface fish  
For detecting bottom fish  
For detecting midwater fish  
8
7
8
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
TVG NEAR  
TVG FAR  
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
TVG NEAR  
TVG FAR  
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
TVG NEAR  
TVG FAR  
7
5
8
10  
10  
10  
5
5
6
5
6
7
Narrow  
Narrow  
Narrow  
HOR  
HOR  
HOR  
BEAMWIDTH  
BEAMWIDTH  
BEAMWIDTH  
Narrow  
Wide  
Wide  
VER  
VER  
VER  
BEAMWIDTH  
BEAMWIDTH  
BEAMWIDTH  
1
3
4
1
3
3
COLOR CURVE  
COLOR CURVE  
COLOR CURVE  
COLOR  
COLOR  
COLOR  
RESPONSE  
RESPONSE  
RESPONSE  
3.8.3  
Programming specific function  
You may program a function key with a menu item from the SONAR or  
SOUNDER menu to use as shortcut. Most items are available except  
TRANSMISSION, ASSIGN SETTING and ASSIGN MENU from the SONAR  
menu and DRAFT from the SOUNDER menu. Locked items (shown in red) are  
available however the message which asks if you are sure to change a setting is  
not displayed when the corresponding function key is operated.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE].  
3. Use the [GAIN] control to choose SONAR or SOUNDER as appropriate.  
4. Use the [RANGE] control to choose item.  
5. Press appropriate function key until the message “COMPLETED” appears  
(more than three seconds).  
6. Press the [MENU] key to close the menu.  
3-11  
 
3. ADVANCED SONAR OPERATION  
3.8.4  
Confirming function key program  
You may confirm function key program as below.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE].  
3. Use the [GAIN] control to choose SONAR.  
4. Use the [RANGE] control to choose ASSIGN MENU. The current programs  
are shown at the top of the menu  
F1  
F2  
F3  
F4  
F1 KEY  
F2 KEY  
TVG NEAR  
TVG FAR  
Function key assignment confirmation screen  
5. Press the [MENU] key to close the menu.  
3-12  
 
3. ADVANCED SONAR OPERATION  
3.9  
Suppressing Effects of Pitching and Rolling  
(Stabilizer)  
The Motion Sensor MS-100 (option) compensates for the affects of pitching and  
rolling to provide steady, non-fading pictures, along the bearing selected. Follow  
the procedure below to use the stabilizer feature.  
Stabilizer activated  
on front beam  
Tilt angle  
compensated  
Ship tilts  
in bow direction  
Not displayed  
Displayed  
Displayed  
Displayed  
Not displayed  
Not displayed  
(You want to  
display this  
fish school)  
Beam before  
stabilizer activated  
Ship is pitching and rolling  
Stabilizer turned ON  
No pitching and rolling  
(Tilt angle compensated  
in one direction only.  
Echo in opposite direction  
is not displayed.)  
How the stabilizer works  
1. Operate the trackball to place the trackball mark on the bearing where you  
want the stabilizer the picture.  
2. Press the [STABILIZER] key. The stabilizer mark, a dashed line extending  
from the screen center to the edge of the effective diameter of the sonar  
display, appears on the bearing selected and “STAB” appears at the top right  
corner of the sonar display.  
Stabilizer ON  
STAB  
Stablizer Mark  
Picture is stabilizer  
on bearing chosen  
with this mark.  
B 45S  
Stablizer bearing data  
Stabilizer mark  
Note: If the target lock function is active when the stabilizer is turned on, the  
stabilizer works on the bearing selected for the target lock feature  
(target lock function has higher priority) and the stabilizer mark is not  
displayed. Even when target lock is deactivated the stabilizer operates  
on the bearing selected for target lock.  
3-13  
 
3. ADVANCED SONAR OPERATION  
3. To turn off the stabilizer, press the [STABILIZER] key. The stabilizer mark,  
stabilizer indication and stabilizer bearing data are erased. If range and  
bearing marks are shown they are displayed along with their data.  
Note 1: The tilt angle can be manually set in the range of 0-55°, however  
pitching and rolling are compensated within the ±20° in the tilt angle  
range of 0 to 55°.  
Note 2: If the target lock is activated while the stabilizer is on, the bearing set for  
target lock will be used with the stabilizer as well and the stabilizer mark  
is erased. When the target lock is turned off, the bearing set before  
target lock was turned on is used and the stabilizer mark reappears at  
the bearing originally selected.  
3-14  
 
4. ECHOSOUNDER MODE  
This chapter covers operation of the echosounder picture, which may be  
displayed by choosing the COMBI-2 mode.  
4.1  
Choosing the Range  
The basic range and range shifting functions together give you the means to  
select the depth you can see on the screen. The basic range can be thought  
of as providing a “window” into the water column and range shifting as  
moving the “window” to the desired depth.  
Shift  
Display  
Display range and shift concept  
Note: Select the Range and Shift to the same setting as the echo sounder  
connected. This setting does not affect the original echo sounder  
setting.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4-1  
 
4. ECHOSOUNDER  
SOUNDER MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
COLOR:  
: SONAR  
SOUNDER  
MARKS  
SYSTEM  
1
2
3
4
RANGE  
: 160  
: 0  
SHIFT  
E/S INT REJECT : ON  
OFF  
GAIN  
: 3.0  
CLUTTER: 2.0  
ADVANCE  
: 2/1  
1/8  
1/1  
1
1/2  
2
1/4  
3
COLOR CURVE  
: LINEAR  
DELETE  
DRAFT  
COLOR: 0  
: 0.0(m)  
PRESS [MENU] KEY TO EXIT  
Sounder menu  
4. Use the [RANGE] control to choose RANGE.  
5. Use the [GAIN] control to choose range desired among 20, 40, 80, 120, 160,  
240 and 320 (meters).  
6. To shift the display, use the [RANGE] control to choose SHIFT.  
7. Use the [GAIN] control to choose amount of shift desired (range 0-1000  
(meters)).  
8. Press the [MENU] key to close the menu.  
4.2  
Adjusting the Gain  
You may adjust the display level of the echo sounder picture as below; the gain  
of the echo sounder itself cannot be adjusted from the sonar.  
Note: Set the gain to the same setting as the echosounder connected. This  
setting does not affect the original echosounder setting.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4. Use the [RANGE] control to choose GAIN.  
5. The gain setting is locked so operate the [GAIN] control to choose YES and  
then press the [EVENT] key.  
6. Use the [GAIN] control to adjust gain (setting range: 0.0-10.0).  
7. Press the [MENU] key to close the menu.  
4-2  
 
4. ECHOSOUNDER  
4.3  
Picture Advance Speed  
The picture advance speed determines how quickly the vertical scan lines run  
across the screen. When selecting a picture advance speed, keep in mind that a  
fast advance speed will expand a fish school horizontally and a slow advance  
speed will contract it.  
Note:Match the picture advance speed to that of the echo sounder. This setting  
does not affect original echosounder setting.  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4. Use the [RANGE] control to choose ADVANCE.  
5. The picture advance speed setting is locked so use the [GAIN] control to  
choose YES and then press the [EVENT] key.  
6. Use the [GAIN] control to adjust advance speed desired. The fractions in the  
dialog box are one line produced per number of transmissions. For example,  
“1/2” displays one scan line per two transmissions.  
7. Press the [MENU] key to close the menu.  
4.4  
Measuring Depth  
You can measure depth to the cross-hair cursor as follows:  
1. Use the trackball to place the trackball mark inside the echosounder display.  
The trackball mark changes to a cross-hair cursor.  
2. Adjust the trackball to place the cross-hair cursor at the location desired.  
3. Read the depth to the location at the cross-hair cursor.  
N
839  
810  
217  
SHIP SPEED  
12.4 kt DEPTH 126m  
N
R 1000  
T 15  
(159  
SHIP COURSE 246  
LAT/LON  
32 52.150N  
132 12.150E  
B
60S  
G 10.0  
20min 10  
14  
0
WATER TEMP  
12.4 C  
12  
10  
-
-
0
-
Depth to cross-hair  
cursor intersection  
100 -  
-
101  
Cross hair-cursor  
500  
200 -  
S
Measuring depth  
4-3  
 
4. ECHOSOUNDER  
4.5  
Suppressing Interference  
Interference from other sounders or electrical interference shows itself on the  
screen as in the illustration below.  
Interference from  
other sounders  
Inteference from  
electrical equipment  
Interference  
To remove interference, do the following:  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4. Use the [RANGE] control to choose E/S INT REJECT.  
5. Use the [GAIN] control to choose ON. (If no interference exists, choose OFF.)  
6. Press the [MENU] key to close the menu.  
4.6  
Suppressing Low Level Noise  
Low level noise, often caused by sediments in water, is painted on the screen as  
a large number of light-blue dots. These echoes may be suppressed as below.  
Clutter  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4. Use the [RANGE] control to choose CLUTTER.  
5. CLUTTER is locked so use the [GAIN] control to choose YES and then press  
the [EVENT] key.  
6. Use the [GAIN] control to choose setting. (The setting range is 0.0-10.0 and  
the higher the number the stronger the echo that will be erased.)  
7. Press the [MENU] key to close the menu.  
4-4  
 
4. ECHOSOUNDER  
4.7  
Erasing Weak Echoes  
Sediments in the water or reflections from plankton may be painted on the  
screen in green or light-blue, as shown in the illustration below. These echoes  
may be erased in order of strength as below.  
Weak reflections  
Weak echoes  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SOUNDER.  
4. Use the [RANGE] control to choose DELETE COLOR.  
5. Use the [GAIN] control to choose setting desired. The setting range is 0-10,  
and the higher the setting the stronger the echo that will be erased.  
6. Press the [MENU] key to close the menu.  
4-5  
 
4. ECHOSOUNDER  
4.8  
Other Items on the Sounder Menu  
The table below describes the SOUNDER menu items not described in the  
previous sections of this chapter.  
Sounder menu description  
Item  
Description  
Ref. page  
COLOR  
Choose one of four display color patterns, according to  
your environment.  
COLOR  
CURVE  
Adjusts echo presentation color curve against strong  
reflections. For example, setting “1” averages weak to  
strong signals to obtain a balanced picture. The larger  
the setting the better the resolution on weak signals.  
DRAFT  
Set ship’s draft to get depth from the sea surface  
(rather than from the transducer).  
4-6  
 
5. MARKS AND DATA  
5.1 Marks and Data on the Normal Display  
Freeze condition (for testing)  
Range (Shown several  
seconds when range  
is changed.)  
TX Off  
Stabilizer  
Trackball Mark Data  
Slant Range  
Horizontal Range  
Depth  
B Relative Bearing*  
Range  
Tilt Angle  
(Auto Tilt value)  
Gain  
Function Key Number  
On*  
Heading*  
TX OFF STAB  
R 1000  
372 freeze  
359  
96  
N
Speed*  
SHIP SPEED 12.4 kt  
N
R 1000  
T 15  
°
Course*  
SHIP COURSE 246°  
Stablilizer  
(15)  
G 10.0  
F1  
B 60S  
2nd Latest Fish Mark*  
Fish Mark*  
LAT/LON  
Mark*  
Fish Mark*  
32°52.150N  
132°12.150E  
Position*  
Depth*  
Range Mark  
Heading Mark  
Bearing  
Mark  
Trackball Mark  
DEPTH  
126m  
Latest Event  
Mark*  
WATER CURRENT  
Current Data  
(current speed  
and direction  
for 3 layers)*  
North Mark*  
W
Own Ship  
Mark  
E
C1 1.2kt 342°  
C2 0.8kt 298°  
C3 0.4kt 256°  
Bearing  
Scale  
1
3
Current Mark*  
Event Mark*  
2
Target Lock  
Mark*  
1
Temperature*,  
Temperature  
Graph*  
Own Ship Position  
Mark*  
WATER TEMP 12.0°C  
557  
149  
SW/W  
238  
493  
132  
20min  
10  
0
500  
Range Ring,  
B
14  
12  
10  
Ship’s Track*  
Range Ring Data  
Bearing Mark  
Note: No or missing  
data in text window  
shown with asterisks.  
450  
15  
( 121)  
S
S 10.5kt  
(m) C ESE  
R 450 B 224°  
B NW  
Target Lock Data*  
Event Mark Data*  
Horizontal Range  
Depth  
( ) Depth at time of entry  
B True Bearing*  
Fish Mark Data*  
238  
493  
132  
Range between fish marks  
Range to fish mark  
Depth  
Range  
Depth  
557  
149  
Range and  
Bearing Data  
Bearing  
SW/W  
B
S 10.5kt  
(m) C ESE  
Speed  
Course  
* = Requires appropriate sensor.  
20min  
14  
10  
0
Temperature Graph  
The temperature graph plots the latest 20 minutes of water  
temperature data, with a solid light blue line, scrolling from  
right to left. The range of the y-axis is 5° and that of the x-axis  
is 20 minutes. When temperature data is lost a horizontal  
dashed line starts extending from the point where the data  
was lost.  
Temperature  
data regained  
12  
10  
Temperature data lost  
Marks and data on the normal display  
5-1  
 
4. ECHOSOUNDER  
Description of marks and data on the normal display  
Mark/Data  
Description  
Own Ship Mark  
Shows own ship’s present position and points in bow direction.  
North Mark*  
When a heading sensor is connected, the North mark is displayed and  
points to North.  
North mark  
Heading Mark  
The heading mark is a dashed line extending from the screen center  
to the edge of the outermost range ring and it points in the direction of  
ship’s heading.  
Heading mark  
Heading  
With connection of a heading sensor, heading is shown 32 compass  
points (N, N/NE, etc.). The heading may also be displayed in true  
bearing in which case the indication is 360  
°.  
Own Ship Position  
Mark  
The own ship position mark is entered at own ship’s position, with  
the [ EVENT] key. 10 marks may be entered.  
Sets own ship’s mark location for off-center display; sets location for  
mark input; measures range and bearing. The trackball controls  
this mark.  
Trackball Mark  
Trackball Mark Data  
Trackball mark data:  
, slant range;, Horizontal range; , Depth,  
B, Bearing. Appears at top left corner of the sonar display.  
Relative bearing  
B
Bearing is shown in 360° or ±180° indication system, relative to ship’s  
heading. In the latter case, " B" isindicated as follows:  
°
.... on the port side  
.... on the starboard side  
B
B
P
S
Indication format may be selected with OTHER MARKS on the MARKS  
menu.  
Range Data  
Range setting, selected with the [ RANGE] control, appears at top  
right corner of the sonar display.  
R
Tilt Angle Data  
The tilt angle appears below the range indication at the top right corner  
of the sonar display. The tilt angle can be changed in 1  
°
steps within  
°
)
T
(
the range of 0 to 55 . In target lock* and automatic tilt control, the  
°
°
instantaneous tilt angle appears in parentheses. Accordingly, both are  
equal when target lock is on. In automatic tilt, the upper indication  
shows the tilt angle set by the TILT lever and the lower indication the  
instantaneous tilt angle at which the sonar actually works.  
The gain chosen with the [ GAIN] control appears on the top right  
corner of the sonar display.  
Gain  
G
.
Function Key Number  
Function key number appears at the top right corner of the sonar  
display.  
F
* = Requires appropriate sensor.  
5-2  
 
5. MARKS AND DATA  
Description of marks and data on the normal display (con’t from previous page)  
Mark/Data  
Range Rings  
Description  
The range rings are dashed concentric circles inscribed at intervals of  
1/4 or 1/2 of the range in use, depending on menu setting. Range  
ring data is also provided every two range rings.  
500  
The electronic bearing scale is the outermost ring on the sonar display  
and is available with heading sensor connection. It rotates with own  
ship’s movement.  
Electronic Bearing  
Scale*  
N
W
E
S
Ship’s Track Mark*  
With heading and speed data, own ship’s track is plotted by a solid  
line. The track length can be selected among five or ten times the  
range. When the length exceeds the chosen length, the track is  
erased so that its length is equal to the chosen length.  
3
This mark can be displayed with current indicator input. The current  
marks show tidal current speed and direction in three layers (1-3),  
selected on the current indicator. The tidal current speed is shown by  
the length of the line extending from the center of the mark.  
Current direction can be shown as "to" or "from" with CURRENT DIR  
on the MARKS menu.  
Current  
Mark*  
2
1
Current Data*  
C1: . kt  
C2: . kt  
C3: . kt  
Current speed range: 0.0 to 9.9 kt  
Direction range: 180 or 0-359  
Own Ship Position Data*  
With navigation input, position can be displayed in latitude and long-  
itude (or Loran C TDs) in the text window.  
Latitude range: 90 00.000S to 90 00.000N  
.
.
N
E
Longitude range: 179 59.999S to 179 59.999E, 180 00.000  
With appropriate sensors, speed, course, water depth and  
water temperature can be displayed in the text window.  
Speed range: 0.0-40 kts  
Nav Data*  
SHIP SPEED:  
SHIP COURSE:  
.
kt  
Course range: 0-359  
Depth range: 0-9999 m (same range for any depth unit)  
DEPTH:  
WATER TEMP:  
m
Water temperature range: -10.0 to 40.0  
C
.
The target lock mark automatically tracks the fish school selected  
by the operator. This function requires speed and heading data.  
Target Lock Mark*  
Target Lock Mark Data*  
The slant range ( ), depth ( ) and bearing (B) of the fish echo are  
shown at the bottom left corner on the sonar display.  
B
5-3  
 
5. MARKS AND DATA  
Description of marks and data on the normal display (con’t from previous page)  
Mark/Data  
Description  
Latest Event Mark  
This mark depicts important locations. Use the trackball to place the  
trackball mark where desired and press the [EVENT] key to inscribe  
an event mark. Requires speed and heading data. Event marks  
follow own ship’s movement. Ten marks may be entered and each  
press of the [EVENT] key enters an event mark and previously  
entered marks change as follows.  
Event Mark  
1
. . .  
1
2
3
9
Latest  
Event  
Mark  
Past Event Marks (Max. 9)  
The position data of the latest event mark, that is, horizontal range  
(), depth () and bearing. ( ) shows the latest event mark’s  
Latest Event Mark Data  
original depth, and remains unchanged regardless of ship’s move-  
movement or tilt angle. When the event mark is erased the  
above data disappears from the screen.  
To erase an event mark, place the trackball mark on it and then press  
the [DELETE MARK] key.  
)
(
°
B
Latest Fish Mark  
2nd Latest Mark  
Fish Mark  
These marks are inscribed on the screen by pressing the [FISH] key.  
Ten fish marks can be displayed. Each time the key is pressed the  
fish marks change on the screen as follows:  
1st press of FISH key  
2nd press of FISH key  
3rd press of FISH key  
4th press of FISH key  
Fish Movement Data  
Fish movement from the latest fish mark ( ) to the 2nd latest fish  
mark ( ) is shown by horizontal range (  
), depth (), speed (S) and  
course (C), at the lower right corner of the screen.  
S
C
.
Range and Bearing  
The range and bearing marks are used to choose the location to  
monitor aurally. Place the trackball mark on the location desired and  
press the [R/B] key. Own ship position and trackball mark are  
connected with a straight line, the bearing mark. The range mark is  
drawn with a concentric circle whose center is at own ship position  
and its radius touching the trackball mark’s intersection.  
Marks  
Bearing  
mark  
Range  
mark  
Range and Bearing  
Marks Data  
Range (R) and bearing (B) marks data are shown at the bottom of the  
display when the range and bearing marks are displayed.  
R
B
°
Stabilizer Mark*  
Stabilizer  
mark  
With connection of Motion Sensor MS-100, the picture along the  
bearing chosen with the stabilizer mark is stabilized against ship’s  
pitching and rolling. Choose the location with the trackball mark and  
press the [STABILIZER] key to stabilize the picture along the bearing  
selected.  
5-4  
 
5. MARKS AND DATA  
5.2  
Marks and Data on the Echosounder and Audio  
Displays  
N
SHIP SPEED  
12.4 kt DEPTH 126m  
N
Speed*, Depth  
Course*  
SHIP COURSE 246  
SONAR MARKS AND INDICATIONS  
SAME AS ON NORMAL DISPLAY  
LAT/LON  
32 52.150N  
132 12.150E  
Position*  
Range and  
Bearing Marks  
20min 10  
14  
0
WATER TEMP  
12.4 C  
Temperature*,  
Temperature  
Graph*, *1  
12  
10  
-
-
0
-
Net Sonde  
Mark (orange)*, *2  
100 -  
Color  
Bar  
-
Cross-hair Cursor  
200 -  
500  
205  
Depth to  
-
cross-hair cursor  
intersection *3  
S
300-  
R 552 B 60S  
Depth Scale *4  
Range and Bearing Data  
* = Requires appropriate sensor.  
*2 = Echosounder display only  
*3 = Depth on echosounder display;  
range on audio display.  
*4 = Depth scale on echosounder  
display; range scale on audio  
display.  
*1 = Water current data may be displayed  
instead of temperature graph.  
See DISP SELECT on the SYSTEM  
menu.  
WATER CURRENT  
WATER TEMP  
C1 1.2kt 342  
12.4 C  
Note:Range and bearing marks  
are used to choose the  
location to display in the  
audio display.  
C2 0.8kt 298  
C3 0.4kt 256  
Marks and data on the echosounder and audio displays  
5-5  
 
5. MARKS AND DATA  
Description of marks and data on the echosounder and audio displays  
Mark/Data  
Color Bar  
Description  
The color bar provides an estimate of echo strength in 16 colors. The  
red color is the strongest echo signal.  
The depth scale and range scale provide an estimate of depth and  
range in the echosounder and audio displays, respectively. It may be  
displayed at the right or left side of those displays. See COMBI SCALE  
on the SYSTEM menu.  
Depth Scale, Range  
Scale  
0 -  
-
100 -  
-
200 -  
-
300 -  
Cross-hair Cursor  
The cross-hair cursor measures the depth and range to the user-  
selected location in the echosounder and audio displays, respectively.  
Depth or range appears at the cross-hair cursor intersection.  
Depth or  
200  
Range  
Net Sonde Mark*  
(Echosounder display  
only)  
The net sonde marks are orange horizontal lines (solid or dashed line)  
which mark the location of the net sonde fed from the echosounder.  
5-6  
 
6. INTERPRETING THE DISPLAY  
6.1  
Bottom Echo  
When the tilt angle is changed, the bottom echo will appear on the screen. When  
the tilt angle is decreased, the bottom trace becomes wider and weaker. By  
observing the bottom condition on the screen, the skipper can prevent the net  
from being damaged by a reef or a shipwreck.  
(A) Flat bottom  
Tilt angle: 10˚ to 15˚  
Decreased tilt angle  
Only half of  
vertical beam width  
captures the bottom.  
(B) Flat bottom  
Tilt angle: 20˚ or more  
Bottom is displayed  
narrower and in  
stronger colors when  
compared to (A).  
(C) Sloping bottom  
Tilt angle: 20˚ or more  
Shallow bottom  
is displayed in  
a strong color  
and with a  
short tail.  
Bottom  
The deeper, sloping  
bottom echo is displayed  
in a weak color and  
with a long tail.  
Bottom echoes  
6-1  
 
6. INTERPRETING THE DISPLAY  
6.2  
Fish School  
A fish school appears as a mass of echoes. The color of the mass shows the  
density. To know the distribution and center point of a fish school, choose  
several different tilt angles.  
(A) Sea surface fish  
Tilt angle: 0˚ to 10˚  
Bottom echo not  
displayed because  
of decreased tilt angle.  
Sea surface  
Fish  
school  
reflections are  
present.  
Sea surface  
reflections  
(B) Midwater, bottom fish  
Tilt angle: 30˚ or more  
Fish echo which appears before bottom can be detected.  
Bottom  
Fish  
school  
Large midwater  
fish school is  
present.  
Tilt angle: 0˚ to 20˚  
Fish echo which appears together with  
or after bottom can be detected.  
Fish  
school  
Bottom  
To search bottom fish, use a  
narrow tillt angle so the bottom  
echo will be weak, enabling you  
to see bottom fish echoes.  
Fish echoes  
6-2  
 
6. INTERPRETING THE DISPLAY  
6.3  
Sea Surface Reflections  
To reduce sea surface reflections, set the tilt angle to 5° or more so that the  
upper edge of the sonar beam does not hit sea surface, or adjust the TVG  
functions. When the sonar is used with a narrow tilt angle, the sea surface  
reflections cover a large area (up to 300 m to 400 m) as illustrated below.  
Sea surface  
Tilt angle  
indication  
Tilt: 0˚  
Sea surface  
reflections  
Sea surface  
Tilt: 5-6˚  
Sea surface reflections  
6.4  
Wake  
A wake produced by own ship or another ship can be a strong reflecting object  
when the sonar is used with a narrow tilt angle. As the wake appears on the  
screen as a thick continuous line, it can be easily distinguished from a fish  
school. On the other hand, the wake contains a lot of air bubbles which  
attenuate ultrasonic energy, making it often difficult to sound beyond the wake.  
Other  
ship  
Own  
ship  
Own ship's  
screw noise  
Wake produced  
by other ship  
Own ship's wake  
(produced when  
own ship turns)  
Own ship's  
screw noise  
Wake  
6-3  
 
6. INTERPRETING THE DISPLAY  
6.5  
False Echo by Sidelobe  
An ultrasonic wave is emitted only in the direction set by the [TILT] lever but, in  
practice, there are some emissions outside the main beam that are called  
“sidelobes.” Energy of the sidelobe is fairly weak but when the sonar is used in  
comparatively shallow water with a hard and rocky bottom, strong target signals  
are detected by the sidelobe. These are represented on the screen as a false  
echo as shown below. To weaken the sidelobe echoes, set VER BEAMWIDTH to  
WIDE, on the SONAR menu.  
Mainlobe echo  
Sidelobe echo  
Sidelobe  
Mainlobe  
The bottom echo  
detected by sidelobe  
appears at a certain  
tilt angle when the  
sidelobe points ver-  
tically. Also, poor  
soundome projection  
may result in a similar  
false echo.  
Sidelobe echo  
6.6  
Noise and Interference  
If the fishing ground is crowded with many fishing boats, the sonar is subject to  
interference from ultrasonic equipment such as an echo sounder, sonar, etc. on  
board other boats as well as those on board own ship. For instance, interference  
from the sonar operated on board other boats will appear as a ring as shown in  
(A). This interference can be suppressed by properly changing the TX cycle.  
Electrical equipment on own ship can also cause interference to the sonar as  
shown in (B). The noise from some marine life appears on the screen as in (C).  
Those types of noise can be suppressed with the interference rejector.  
(A) Interference from  
other sonar  
(B) Electrical  
interference  
(C) Marine life noise  
Noise and interference  
6-4  
 
7. MARKS AND SYSTEM MENUS  
This chapter describes the MARKS and SYSTEM menus. To display the  
SYSTEM or MARKS menu, do the following:  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to [MENU MODE] at the top of the screen.  
3. Use the [GAIN] control to choose SYSTEM or MARKS as appropriate.  
7.1  
MARKS Menu  
MARKS MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
1/2ROFF  
OFF  
MARKS  
SYSTEM  
RANGE RINGS  
: 1/4R  
BEARING SCALE : ON  
CURRENT VECTOR : ON  
OFF  
CURRENT DIR  
SHIP’S TRACK  
COURSE  
: TO  
FROM  
: 10R  
5ROFF  
360TRUE  
360TRUE  
360TRUE  
360TRUE  
360  
: 32CMPS  
: 32CMPS  
HEADING  
OFF  
180  
180  
CURRENT DATA : 32CMPS  
360  
360  
EVENT/FISH  
: 32CMPS  
: 180  
OTHER MARKS  
POSITION DATA : L/L  
TD  
PRESS [MENU] KEY TO EXIT  
MARKS menu  
7-1  
 
7. MARKS AND SYSTEM MENUS  
MARKS menu description  
Item  
Description  
Ref. Page  
RANGE RINGS  
Turns the range rings on/off and chooses range ring  
interval, 1/4 or 1/2 the range. When turned off, the north  
mark and heading mark are also turned off.  
5-3  
BEARING SCALE  
Turns the electronic bearing scale on/off.  
Turns the current (tide) mark on/off.  
5-3  
5-3  
CURRENT  
VECTOR  
CURRENT DIR  
Turns current (tide) data on or off. “FROM” shows what  
direction the current is flowing; “TO” shows the direction  
the current is heading. Requires a current indicator.  
Current Mark  
5-3  
2
1
3
1
3
2
FROM  
TO  
SHIP’S TRACK  
Turns ship’s track display on/off. 5R and 10R are the  
amount of track to display; that is, the length of the track  
shown on the display is five and ten times the range,  
respectively.  
5-3  
COURSE  
Chooses how to display course, in 32 compass points  
or 360° true.  
5-3  
5-2  
5-3  
HEADING  
Chooses how to display heading, in 32 compass points  
or 360° true.  
CURRENT DATA  
EVENT/FISH  
Choose how to display current (tide) data, 32 compass  
points, 360° true, ±180° or 360° relative.  
Choose how to display event and fish marks, 32 CMPS, Event MK: 5-5  
360° TRUE, ±180° or 360°. For “±180°,” starboard  
direction is shown as “xxxS” and port direction as  
“xxxP.” True requires a heading sensor. 32 CMPS  
shows direction in compass points such as N, N/E,  
NNE, NE/N, etc.  
Fish MK: 5-4  
Tgt Lock MK: 5-3  
OTHER MARKS  
POSITION DATA  
Chooses how to display other marks, ±180° or 360°.  
R/B MK: 5-4  
Trackball MK: 5-2  
Chooses how to display position, in latitude and  
longitude or Loran TDs.  
5-3  
7-2  
 
7. MENU DESCRIPTION  
7.2 SYSTEM Menu  
SYSTEM MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
MARKS  
SYSTEM  
DIMMER  
: 10  
DISP SELECT  
HEADING ADJ  
: TEMP  
CURRENT  
:
0
AUTO RETRACT : OFF  
SPEED MESSAGE : ON  
(OFF, 5-16kt)OFF  
OFF  
ON  
EXT KP SYNC  
: OFF  
AUTO TRAIN SPD : LOW  
HIGH  
HIGH  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FEET  
CURRENT  
400  
FATHOMS PA/BRA  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
NAV DATA  
GYRO+NAV  
: 200  
PORT1 BAUDRATE : 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE : 19200  
PORT2 FORMAT : NMEA  
9600  
4800  
2400  
CIF  
9600  
4800  
2400  
CIF  
NAV DATA  
: GPS  
LC  
DR  
ALL  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
LEFT  
ON  
: ENGLISH  
(JAPANESE)  
ESPANOL DANSK  
NEDERLND FRANCAIS  
NORSK  
ITALIANO  
(KOREAN)  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
PANEL  
COLOR  
ECHO-2  
ECHO-1  
ECHO-4  
SET TO DEFAULT : EXECUTE  
PRESS [MENU] KEY TO EXIT  
SYSTEM menu  
Description of SYSTEM menu  
Item  
DIMMER  
Description  
Ref. Page.  
1-5  
Adjust control panel backlighting.  
DISP SELECT  
Chooses whether to display current (tide) data or  
temperature data in the combination displays.  
5-5  
HEADING ADJ  
Compensates for error (compensation range: 0-359°) in  
heading alignment of hull unit. If you want to turn the  
displayed echo 30° leftward, for example, enter 30 and to  
turn it rightward 30° enter 330.  
7-3  
 
7. MENU DESCRIPTION  
Description of SYSTEM menu (con’t from previous page)  
Item  
Description  
Ref. Page.  
AUTO RETRACT  
Turns automatic transducer retraction on/off and sets  
speed (5-16) at which retraction occurs. This function  
requires speed data.  
The transducer may be retracted at a speed different from  
set here if the speed data is wrong. Reduce the ship’s  
speed below 16 knots and then retract the transducer.  
SPEED MESSAGE Turns on/off ship’s speed warning message.  
EXT KP SYNC Turn on when using external keying pulse.  
8-6  
AUTO TRAIN SPD Chooses scanning speed of bearing mark; high or low.  
High speed is useful for general searching and tracking  
fast moving fish schools.  
AUTO TILT SPD  
Chooses the speed of tilt change in automatic tilting from  
high or low.  
UNIT  
Chooses unit of depth and distance measurement among  
meters, feet, fathoms, passi/braza.  
Note: The unit of measurement is fixed for some menu  
items (for example, draft). When the unit is changed,  
echosounder range and shift are reset to 0 (zero).  
SHIP’S SPD/BR  
LOG PULSE  
Chooses source of speed and course data with which to  
draw ship’s track. The choices are log/gyrocompass,  
current indicator, nav data and gyro+nav data.  
Chooses log pulse/mile specification of speed log; 200 or  
400 pulses/mile.  
PORT1 BAUD  
RATE  
Sets baud rate of equipment connected to port 1, among  
2400, 4800, 9600 and 19200 (bps).  
PORT1 FORMAT  
Sets format of equipment connected to port 1; NMEA or  
CIF (Furuno).  
PORT2 BAUD  
RATE  
Sets baud rate of equipment connected to port 2, among  
2400, 4800, 9600 and 19200 (bps).  
PORT2 FORMAT  
Sets format of equipment connected to port 2; NMEA or  
CIF (Furuno).  
NAV DATA  
Chooses source of nav data among GPS, LC (Loran C),  
DR (Dead Reckoning) or ALL. “ALL” automatically chooses  
source in the order of GPS, Loran C and dead reckoning.  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
TEST  
Chooses the location of the depth scale and distance scale  
in the combination displays, right or left side.  
5-6  
For use by service technicians. Normally turn this  
indication off.  
Choose the language to display among English, Japanese,  
Korean and several European languages.  
Chooses the test to execute.  
8-6  
SET TO DEFAULT Restores all default settings, including controls. Choose  
this item and then press the [EVENT] key to restore all  
default settings.  
7-4  
 
8. MAINTENANCE,  
TROUBLESHOOTING  
WARNING  
ELECTRICAL SHOCK HAZARD  
Do not open the equipment.  
Only qualified personnel  
should work inside the  
equipment.  
8.1  
General Maintenance  
This equipment is designed and constructed to provide many years of  
trouble-free performance when properly maintained. However, no machine can  
perform to the utmost of its ability without proper maintenance. Check the  
following points monthly.  
Check all cables. If damaged, replace.  
Check connectors at rear of each unit. Tighten or clean as necessary.  
Check earth of each unit. Tighten or clean as necessary.  
Check voltage of ship’s mains to be sure it is within the equipment’s power  
rating.  
8.2  
Cleaning the Equipment  
Dust or dirt can be removed from the equipment with a soft, dry cloth. Do not use  
chemical cleaners to clean the equipment – they can remove paint and markings  
or deform the equipment.  
8-1  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.3  
Hull Unit Maintenance  
8.3.1  
Lubrication points, zinc plate  
Apply MOLYTONE grease  
#2 (or equivalent)  
every six months.  
Raise transducer and coat main  
shaft with DAPHAECOROAEX #2  
(or equivalent) every six months.  
The zinc plate attached  
near the transducer must  
be replaced every year.  
The junction between the  
main shaft and transducer  
may corrode, which may  
result in the loss of the  
transducer or water  
Dry dock ship and clean  
transducer face yearly.  
Apply single coat of  
"MARINE STAR 20 Mod  
(Red-N)" (or equivalent)  
anti-foulant to transducer  
face to keep marine life off  
the transducer. Do not use  
solvents to clean the trans-  
ducer and do not paint the  
transducer face.  
leakage in the vessel.  
HULL UNIT  
Hull unit maintenance points  
8-2  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.3.2  
Manually raising the transducer  
If the transducer cannot be raised automatically, manually raise it as follows:  
CAUTION  
Turn off the hull unit before using the  
hand crank.  
Bodily injury may result if the power is not  
turned off.  
1. Turn off the hull unit’s power switch.  
2. Open the gear cover.  
Screw  
(M4 X 8,  
4 pcs.)  
Gear cover  
Screw shaft gear  
Motor gear  
OFF  
ON  
POWER switch  
Hull unit  
3. Mount the hand crank onto the screw shaft gear or motor gear.  
a) Mounting hand crank  
on screw shaft gear  
b) Mounting hand crank  
on motor gear  
(Requires greater force but  
smaller number of turns.)  
(Requires less force but  
greater number of turns.)  
Hand crank  
Motor gear  
Fix with screw  
Fix with screw  
(Use cover fixing screw.)  
(Use cover fixing screw.)  
Screw shaft gear  
210 turns to move main shaft  
by 600 mm.  
120 turns to move main shaft  
by 600 mm.  
Hand crank  
4. Turn the hand crank clockwise to raise the transducer.  
8-3  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.4  
Fuse Replacement  
WARNING  
Use the proper fuse.  
Use of a wrong fuse can result in damage  
to the equipment.  
The fuses in the processor and transceiver units protect them from overvoltage,  
equipment fault and reverse polarity of the ship’s mains. If the power cannot be  
applied, first check the fuse for the processor unit. The fuse for the transceiver  
unit is inside the unit; have a qualified technician check the fuse. If a fuse blows  
after replacement, or the power cannot be turned in spite of normal fuse, contact  
your dealer for advice.  
Unit  
Fuse Type  
Code No.  
FGBO-A 2AAC125V 000-549-062  
Processor Unit  
FGMB 2A 250V  
FGBO 7A AC125V  
FGMB 2A 250V  
FGBO 4A AC250V  
000-122-000  
000-549-013  
000-122-000  
000-546-707  
Transceiver Unit  
(100 VAC spec.)  
Transceiver Unit  
(220 VAC spec.)  
8.5  
Fan Replacement  
The processor unit has a fan, and its life is about 25,000 hours, in ambient  
temperature of 50°C.  
If the fan stops, because the area around the power supply is too hot, the power  
voltage may fluctuate. Contact a FURUNO agent or dealer to request  
replacement of the fan.  
Type  
Code No  
Fan  
109-180  
000-105-416  
8-4  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.6 Troubleshooting  
The table below provides common symptoms of equipment troubles and the  
means to rectify them.  
Symptom  
Check, Remedy  
Cannot turn on the  
power  
Check power cable.  
Check ship’s mains.  
First check the fuse in the processor unit. If it is OK, have a  
qualified technician check the fuse in the transceiver unit.  
Bottom echo  
becomes irregular  
Rough seas. Distance to the bottom changes due to rolling and  
pitching.  
Long range selected. Transmission period is longer so ship’s  
pitching and rolling are apt to affect detection of echo.  
Weak echo  
Output power set to minimum. Set TX OUTPUT (SONAR menu) to  
maximum.  
Excessive TVG. Readjust TVG NEAR and FAR on the SONAR  
menu.  
Somewhat strange  
color  
Brilliance too low. Adjust display brilliance.  
Picture contains  
noise  
Equipment not grounded properly. Check equipment ground.  
Power cable is too close to the signal cable. Relocate power cable  
or signal cable.  
Debris may be on sea surface. Reject unwanted noise with the  
interference rejector on the SONAR menu.  
Picture does not  
change when tilt  
angle is changed  
Problem in tilt mechanism or control line. Contact a FURUNO agent  
or dealer for advice.  
8-5  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.7  
Error Messages  
The table below shows the error messages which may appear on the display. All  
error messages are accompanied by the audio alarm, which you may silence  
with the [R/B] key.  
Error messages  
Message  
Meaning, Remedy  
Overvoltage  
OVERVOLTAGE  
Excessive voltage detected. The message  
flashes and the audio alarm sounds. Retract  
the transducer and then turn off the power.  
Press the [R/B] key to silence the audio  
alarm. Have a technician check the set.  
RETRACT TRANSDUCER AND TURN OFF  
POWER. PRESS [R/B] KEY TO CLEAR  
ALARM.  
Transducer not retracted  
TRANSDUCER NOT RETRACTED  
If the transducer is not retracted into the  
CUT OFF POWER LINE TO PROCESSOR  
tank in approx. 35 seconds after the [] key  
AND POWER SUPPLY. PRESS [R/B] KEY TO is pressed, the message flashes and the  
CLEAR ALARM.  
audio alarm sounds. Press the [R/B] key to  
silence the audio alarm. Raise the  
transducer manually, following paragraph  
8.3.2.  
High speed  
WARNING  
Ship’s speed is higher than 16 knots when  
you attempted to lower or retract the  
transducer. The message flashes and the  
audio alarm sounds. Press the [R/B] key to  
silence the audio alarm. Reduced speed to  
less than 16 knots, and the previously used  
display appears.  
MAX ALLOWABLE SPEED FOR EXTENDED  
TRANSDUCER IS 16 KT. MAX ALLOWABLE  
SPEED DURING RAISING/LOWERING  
TRANSDUCER IS 16 KT. PRESS [R/B] KEY  
TO CLEAR ALARM.  
If you attempt to lower the transducer when  
the speed is higher than 16 knots the  
message flashes and the audio alarm  
sounds. (The transducer is neither raised  
nor lowered.)  
WARNING  
Ship’s speed is higher than 18 knots with  
the transducer extended. The message  
flashes and the audio alarm sounds. Press  
the [R/B] key to silence the audio alarm.  
Lower speed below 18 knots, and the  
previously used display appears.  
TRANSDUCER IS KEPT EXTENDED  
REDUCE SHIP'S SPEED AND PRESS TO  
RETRACT TRANSDUCER. ACTIVATING  
AUTOMATIC RETRACTION. PRESS [R/B]  
KEY TO CLEAR MESSAGE.  
Automatic retraction  
ACTIVATING AUTOMATIC RETRACTION  
PRESS [R/B] KEY TO CLEAR MESSAGE.  
Transducer is being retracted because ship  
speed set for automatic retraction has been  
reached. (The message appears if AUTO  
RETRACT in the SYSTEM menu is turned  
on.) Press the [R/B] key to clear the  
message.  
8-6  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.8 Diagnostic Tests  
This unit has 10 diagnostic tests (eight with the CSH-8L) which check it for  
proper performance. Although the tests are designed primarily for use by the  
service technician, they can also be executed by the user to identify defective  
components. However, never attempt to check inside the unit; there are no  
user-serviceable parts inside. Any repair work is best left to a qualified  
technician.  
8.8.1  
Choosing a diagnostic test  
1. Press the [MENU] key to open the menu.  
2. Use the [RANGE] control to choose [MENU MODE].  
3. Use the [GAIN] control to choose SYSTEM.  
SYSTEM MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
MARKS  
SYSTEM  
DIMMER  
: 10  
DISP SELECT  
HEADING ADJ  
: TEMP  
CURRENT  
:
0
AUTO RETRACT : OFF  
SPEED MESSAGE : ON  
(OFF, 5-16kt)OFF  
OFF  
ON  
EXT KP SYNC  
: OFF  
AUTO TRAIN SPD : LOW  
HIGH  
HIGH  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FEET  
CURRENT  
400  
FATHOMS PA/BRA  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
NAV DATA  
GYRO+NAV  
: 200  
PORT1 BAUDRATE : 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE : 19200  
PORT2 FORMAT : NMEA  
9600  
4800  
2400  
CIF  
9600  
4800  
2400  
CIF  
NAV DATA  
: GPS  
LC  
DR  
ALL  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
LEFT  
ON  
: ENGLISH  
(JAPANESE)  
ESPANOL DANSK  
NEDERLND FRANCAIS  
NORSK  
ITALIANO  
(KOREAN)  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
PANEL  
COLOR  
ECHO-2  
ECHO-1  
ECHO-4  
SET TO DEFAULT : EXECUTE  
PRESS [MENU] KEY TO EXIT  
4. Use the [RANGE] control to choose TEST.  
5. Use the [GAIN] control to choose a test.  
6. Press the [EVENT] key to execute the test.  
7. To quit a test, press the [MENU] key.  
8-7  
 
8. MAINTENANCE, TROUBLESHOOTING  
8.8.2  
Description of diagnostic tests  
Single test, Conti(nuous) test  
The single and conti(nuous) tests check the ROMs and RAMs for proper  
operation, one time or continuous, respectively. After the test is completed, the  
results are indicated as OK (normal operation) or NG (malfunction), to the right  
of the device checked. For the single test, normal operation is restored after  
completion of the test. When the [MENU] key is pressed in the continuous test,  
the equipment goes into start up condition.  
CONTI TEST  
Processor unit’s program version no.  
and results of ROM, RAM, VRAM  
and EEPROM tests.  
MAIN-0 1050729-XX.XX F FF  
ROM  
RAM  
= OK  
= OK  
VRAM = OK  
0 = Version No. of Board  
EEPROM (P.W) = OK  
Transceiver unit’s program  
version no. (CSH-5L only)  
and results of ROM, RAM  
and DROM* tests.  
TRX  
1050***-XX.XX 1050###-XX.XX FF FF  
ROM  
RAM  
= OK  
= OK  
DROM = OK  
* = Continuous test  
only  
KEY-0 1050730-XX.XX F  
ROM  
RAM  
= OK  
= OK  
PRESS [MENU] KEY TO EXIT  
XX.XX: Program Version No.  
Control unit’s program  
*** : 742 (CSH-5L 55 kHz, 68 kHz)  
735 (CSH-8L 85 kHz)  
736 (CSH-8L 107 kHz)  
### : 733 (CSH-5L 55 kHz)  
734 (CSH-5L 68 kHz9  
version no. and results  
of ROM and RAM tests.  
0 = Version No. of Board  
735 (CSH-8L 85 kHz)  
736 (CSH-8L 107 kHz)  
F
: DIP SW setting  
Continuous test (example: CSH-5L, 55 kHz transducer)  
8-8  
 
8. MAINTENANCE, TROUBLESHOOTING  
Panel test  
The panel test checks the controls on the control unit for proper operation.  
1. Press a key. If the key is normal, “1” is shown at the key’s on-screen location  
when the key is pressed; “0” when it is released. (The POWER switch cannot  
be checked.)  
2. Operate the TILT lever. If the lever is normal, “1” appears when increasing  
the tilt angle, “2” when decreasing the tilt angle and “0” when the lever is  
released.  
3. Operate the trackball. Its X-Y coordinate changes with trackball rotation. The  
coordinates are “0” until the trackball is operated.  
4. Operate the [GAIN] and [RANGE] controls. The on-screen indication is “-1”  
with counterclockwise rotation and “1” with clockwise rotation.  
PANEL TEST  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X=0  
Y=0  
0
0
0
0
0
Trackball position in  
X-Y coordinate  
PRESS [MENU] KEY TO EXIT  
Panel test  
8-9  
 
8. MAINTENANCE, TROUBLESHOOTING  
Color test  
The color test checks for proper display of colors. Press the [EVENT] key to  
change the screen color, in the order of white, red, green and blue.  
WHITE  
RED  
GREEN  
BLUE  
Color test  
Pattern test  
The pattern test displays concentric rings overlaid on a grid to test for proper  
display of rings and horizontal and vertical lines.  
If the test shows error (for example, no horizontal or vertical lines shown), see  
the monitor’s operator’s manual for how to adjust the monitor.  
PATTERN TEST  
PRESS [MENU] KEY TO EXIT  
Pattern test  
8-10  
 
8. MAINTENANCE, TROUBLESHOOTING  
SIO test  
This test checks the input/output ports (CN-A1, NMEA1/CIF1, NMEA2/CIF2) of  
the processor unit. The result for the CN-A1 port is shown as OK or NG (No  
Good).  
The test for the NMEA1/CIF1 and NMEA2/CIF2 ports is for factory use. The  
result is always NG.  
NMEA2/CIF2 port check  
NMEA1/CIF1 port check  
CN-A1 port check  
SIO TEST  
TRX  
PORT1  
PORT2  
= OK  
= NG  
= NG  
PORT 1/2: FACTORY USE ONLY  
PRESS [MENU] KEY TO EXIT  
SIO test  
8-11  
 
8. MAINTENANCE, TROUBLESHOOTING  
Echo tests  
Test  
Description  
Display  
Echo-1 The echo-1 test checks the echo  
display function of the monitor for  
proper operation, emitting artificial scan  
signals in 16 colors. If conducted with  
the COMBI-2 mode active, artificial  
echoes are shown in the echosounder  
display to test the ES interface.  
DISPLAY ECHO TEST  
PRESS [MENU] KEY TO EXIT  
Echo-2 The echo-2 test checks the TVG  
function on the PSW Board in the  
transceiver unit for proper operation.  
When the [MENU] key is pressed,  
the equipment goes into start up  
condition.  
TRX ECHO TEST  
Note: For the CSH-8L, on the SONAR  
menu, set NOISE LIMITER to "0" and  
HOR BEAMWIDTH to "WIDE" before  
conducting this test.  
PRESS [MENU] KEY TO EXIT  
Echo-3 The echo-3 test checks the analog  
multiplexer on the PSW Board in the  
transceiver unit for proper operation.  
This test is not available with the  
CSH-8L. When the [MENU] key is  
pressed, the equipment goes into  
start up condition.  
TRX ECHO TEST  
PRESS [MENU] KEY TO EXIT  
Echo-4 The echo-4 test checks the BMF Board  
in the transceiver unit for proper  
operation. This test is not available  
with the CSH-8L. When the [MENU]  
key is pressed, the equipment goes  
into start up condition.  
TRX ECHO TEST  
PRESS [MENU] KEY TO EXIT  
Echo tests  
8-12  
 
SPECIFICATIONS OF COLOR SCANNING SONAR  
CSH-5L/8L  
1
PROCESSOR UNIT  
1.1 Display Mode  
Single scan  
Echo sounder combination (single scan and echo sounder)  
Audio combination (single scan and audio pictures)  
Scan/echo: 16 colors, mark: 1 color  
1.2 Colors  
1.3 Mark  
Own ship’s track, Heading line, Direction/distance, Fish school,  
Event, Target lock  
1.4 Alphanumeric Data  
Sonar Picture  
Range, tilt angle, gain  
Trackball Mark  
Event Mark  
Slant range, horizontal range, depth, bearing  
Horizontal range, depth, first event marked depth, bearing  
Bearing, range  
Bearing/Range Mark  
Own Ship’s Position  
Navigation Data  
Current Data  
Latitude/longitude, LOP  
Ship’s speed, bearing, depth, water temperature  
Current speed and direction  
1.5 Unit  
Meter, feet, fathom, P/B  
1.6 Features  
Interference rejecter, Afterglow, Noise limiter, Numeric indication  
Automatic tilt scanning, Over-voltage Warning,  
Unretracted Transducer warning  
2
TRANSCEIVER UNIT  
2.1 Transmitter  
2.2 Receiver  
2.3 Feature  
2.4 TX Frequency  
CSH-5L:  
High power MOS FET amplifier with 11-step power reduction switch  
Low noise superheterodyne, Continuously scanning beam forming  
TVG, AGC  
55 kHz or 68 kHz  
85 kHz or 107 kHz  
CSH-8L:  
04/07/05  
SP - 1  
E1319S01D-M  
 
2.5 Range  
Range (m)  
Echo Sounder Combination  
Single  
Offcenter  
Basic  
Range (m)  
Offcenter  
“OFF”  
Offcenter  
“OFF”  
Offcenter  
“ON”  
“ON”  
50  
85  
65  
80  
50  
85  
65  
110  
135  
110  
100  
150  
200  
250  
300  
350  
400  
450  
500  
600  
800  
1000  
1200  
1600  
130  
195  
160  
240  
100  
150  
200  
250  
300  
350  
400  
450  
500  
600  
800  
1000  
1200  
1600  
130  
195  
260  
320  
260  
325  
400  
325  
390  
480  
390  
455  
560  
455  
520  
640  
520  
585  
720  
585  
650  
800  
650  
780  
960  
780  
1040  
1300  
1560  
2080  
1280  
1600  
1920  
2560  
1040  
1300  
1560  
2080  
Note  
1) Ranges shown for off-center “on” are maximum value.  
2) Under certain circumstances, a target (fish school) may not be  
detected due to its nature or because of sea conditions, ever if  
it is located within the display range.  
2.6 Pulse-length  
0.5 to 20 ms, interlocked with range (can be changed in 11 steps)  
2.7 Pulse Repetition Rate (PRR)  
0.25 to 4.4 s, interlocked with range (can be changed in 11 steps)  
External synchronized transmission keying  
2.8 Audio Search  
Method  
By built-in loudspeaker  
20°, 40°, 80° and 120° selectable  
2 W  
Sector  
Output  
Frequency  
800 Hz (CSH-5L), 1 kHz (CSH-8L)  
3
HULL UNIT  
3.1 XDCR travel  
600 or 400 mm, selectable  
3.2 Raising/lowering Time 400 mm: 14 s, 600 mm: 20 s  
3.3 Driving System Remote electric control  
3.4 Allowable Ship’s Speed 18 knots max. (16 knots during raise/lower operation)  
04/07/05  
SP - 2  
E1319S01D-M  
 
4
INTERFACE  
4.1 Input Data  
4.2 Log, E/S, KP  
4.3 Output Data  
NMEA 0183 Ver1.5/2.0/2.2  
GGA, RMC, GLL, VHW, VTG, HDG, HDM, HDT, DPT, DBT, DBS,  
CUR, VDR, GLC, GTD, MTW, RMA  
Speed log pulse (contact signal): 200/400 pulse/NM  
Sonde, E/S signal: VI-1100A applicable  
External KP: Current loop, 0 to 12V  
NMEA 0183 Ver1.5/2.0/2.2  
TLL  
4.4 eo Signal Output  
Method  
RGB analog, separated synchronization, XGA (VESA)  
1024 x 768, 65.0 MHz clock  
Resolution  
Frequency of Vertical/Horizontal  
60 Hz/ 48.36 kHz  
Connector  
D-sub15P-female  
4.5 CIF Data Input  
Location, Ship’s Speed, Bearing, Current data (1 Layer),  
Water depth, Water temperature, Multiple layer current data  
5
POWER SUPPLY  
5.1 Processor Unit  
CSH-5L:  
100/115/200/220/240 VAC, 1 phase, 50-60 Hz  
100/115/200 VAC: 4.0A, 200/220/240 VAC: 2.0A  
100/115/200 VAC: 4.5A, 200/220/240 VAC: 2.2A  
Required for 24 VDC  
CSH-8L:  
5.2 Inverter  
6
ENVIRONMENTAL CONDITION  
6.1 Ambient Temperature  
6.2 Relative Humidity  
6.3 Waterproof  
0°C to +50°C  
95% at 40°C  
Processor Unit/ Control Unit: IPX2 (w/o connector panel of processor unit)  
Others:  
IPX0  
6.4 Vibration  
IEC 60945  
7
COATING COLOR  
7.1 Processor Unit  
7.2 Control Unit  
7.3 Transceiver Unit  
7.4 Hull Unit  
2.5GY5/1.5  
N3.0  
2.5G7/2  
Newtone No.4, others  
04/07/05  
SP - 3  
E1319S01D-M  
 
This page is intentionally left blank.  
 
MENU TREE  
Default settings shown in bold italics. The menu item “[MENU MODE],” which chooses a  
menu, is shown at the top of each menu.  
Sonar menu  
DISPLAY MODE (COMBI-1, NORM, COMBI-2)  
TX OUTPUT (0-10, 8)  
[MENU] key  
(SONAR  
PULSE LENGTH (0-10, 8)  
TX CYCLE (0-10, 10)  
selected from  
MENU MODE)  
TVG NEAR (0-10, 6)  
TVG FAR ( (0-10, 7)  
AGC (0-10, 2)  
2ND AGC (0-10, 1)  
NOISE LIMITER (0-10, 3)  
COLOR CURVE (1, 2, 3, 4)  
COLOR RESPONSE (1, 2, 3, 4)  
DELETE COLOR (0-10, 0)  
ECHO AVERAGE (0-3, 1)  
INT REJECT (0-3, 1)  
HOR BEAMWIDTH (WIDE, NARROW)  
VER BEAMWIDTH (WIDE, NARROW)  
COLOR (1, 2, 3, 4)  
ERASE MARKS (TRACK, SHIP, EVENT, FISH)  
ALARM LEVEL (0-14, 9)  
AUTO TRAIN (ON, OFF)  
TRAIN SECTOR ( 10 , 20 , 40 , 60 )  
AUTO TILT (ON, OFF)  
TILT ANGLE ( 2-10 , 4-14 , 6-20 , 10-26 )  
TRANSMISSION (ON, OFF)  
AUDIO VOLUME (0-10, 10)  
ASSIGN SETTING (F1 KEY, F2 KEY, F3 KEY, F4 KEY)  
ASSIGN MENU (EXECUTE)  
Sounder menu  
COLOR (1, 2 ,3 4)  
RANGE (20-320, 160 (m))  
SHIFT (0-1000, 0 (m))  
E/S INT REJECT (ON, OFF)  
GAIN (0.0-10.0, 3.0)  
[MENU] key  
(SOUNDER  
selected from  
MENU MODE)  
CLUTTER (0.0-10.0, 2.0)  
ADVANCE (2/1, 1/1, 1/2, 1/4, 1/8)  
COLOR CURVE (LINEAR, 1, 2 , 3)  
DELETE COLOR (0-19, 0)  
DRAFT (0.0-10.0, 0(m))  
AP-1  
 
MENU TREE  
Marks menu  
[MENU] key  
(MARKS  
RANGE RINGS (1/4R , 1/2R, OFF)  
BEARING SCALE (ON, OFF)  
selected from  
MENU MODE)  
CURRENT VECTOR (ON, OFF)  
CURRENT DIR (TO, FROM)  
SHIP’S TRACK (10R, 5R, OFF)  
COURSE (32CMPS, 360TRUE)  
HEADING (32CMPS, 360TRUE, OFF)  
CURRENT DATA (32CMPS, 360TRUE, 180 , 360 )  
EVENT/FISH (32CMPS, 360TRUE, 180 , 360 )  
OTHER MARKS ( 180 , 360 )  
POSITION DATA (L/L, TD)  
System menu  
[MENU] key  
(SYSTEM  
selected from  
MENU MODE)  
DIMMER (0-10, 10)  
DISP SELECT (TEMP, CURRENT)  
HEADING ADJ (0-359 , 0 )  
AUTO RETRACT (OFF, 5-16 kt)  
SPEED MESSAGE (ON, OFF)  
EXT KP SYNC (OFF, ON)  
AUTO TRAIN SPD (LOW, HIGH)  
AUTO TILT SPD (LOW, HIGH)  
UNIT (METERS, FEET, FATHOMS, PA/BRA)  
SHIP’S SPD/BR (LOG/GYRO, CURRENT, NAV DATA, GYRO+NAV)  
LOG PULSE (200, 400)  
PORT1 BAUDRATE (19200, 9600, 4800, 2400)  
PORT1 FORMAT (NMEA, CIF)  
PORT2 BAUDRATE (19200, 9600, 4800, 2400)  
PORT2 FORMAT (NMEA, CIF)  
NAV DATA (GPS, LC, DR, ALL)  
COMBI SCALE (RIGHT, LEFT)  
SUB TEXT INDI (OFF, ON)  
LANGUAGE (ENGLISH, Others)  
TEST (SINGLE, CONTI, PANEL, COLOR, PATTERN, SIO, ECHO-1, ECHO-2, ECHO-3*, ECHO-4*)  
SET TO DEFAULT :EXECUTE  
* = CSH-5L only  
AP-2  
 
INDEX  
2
E
2ND AGC .................................................... 2-3  
Echo average ..............................................2-7  
Echo tests..................................................8-12  
Error messages...........................................8-6  
EVENT key..................................................3-7  
Event marks  
A
AGC ............................................................ 2-2  
ALARM ZONE key...................................... 3-4  
Audio volume............................................ 1-17  
Auto retraction............................................. 7-4  
Auto tilt...................................................... 1-10  
Auto train..................................................... 3-3  
deleting....................................................3-8  
deleting all ...............................................3-9  
entering....................................................3-7  
F
B
Fan replacement .........................................8-4  
Fish alarm....................................................3-4  
FISH ALARM key ........................................3-4  
FISH key......................................................3-5  
FISH marks  
Beamwidth .................................................. 2-7  
Bearing scale.............................................. 7-2  
C
Clutter ......................................................... 4-4  
Color (sonar)............................................. 1-17  
Color curve  
deleting all ...............................................3-9  
deleting individual....................................3-6  
entering....................................................3-5  
Function keys  
echosounder........................................... 4-6  
sonar..................................................... 1-16  
Color response (sonar)............................. 1-17  
Color test................................................... 8-10  
Continuous test........................................... 8-8  
Control unit.................................................. 1-1  
Current vector, direction.............................. 7-2  
confirming program ...............................3-11  
operating................................................3-10  
programming .........................................3-11  
Fuse replacement........................................8-4  
G
Gain  
D
Default settings........................................... 7-4  
DELETE MARK key.............................3-6, 3-8  
Deleting marks............................................ 3-9  
Depth measurement (echosounder mode). 4-3  
Diagnostics  
echosounder............................................4-2  
sonar........................................................1-9  
GAIN control (sonar) ...................................1-9  
H
Heading adjustment ....................................7-3  
Hull ..............................................................8-2  
choosing.................................................. 8-7  
color test ............................................... 8-10  
continuous test........................................ 8-8  
echo tests.............................................. 8-12  
panel test ................................................ 8-9  
pattern test............................................ 8-10  
single test................................................ 8-8  
SIO test..................................................8-11  
DIMMER ..................................................... 1-5  
Display mode.............................................. 1-6  
Draft (sonar)................................................ 4-6  
I
Interference rejector  
echosounder mode..................................4-4  
sonar........................................................2-5  
K
Keying pulse................................................7-4  
L
Language.....................................................7-4  
Log pulse.....................................................7-4  
IN-1  
 

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