Furuno SONAR csh5l User Manual

OPERATOR'S MANUAL  
COLOR SCANNING SONAR  
CSH-5L  
CSH-8L  
MODEL  
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The paper used in this manual  
is elemental chlorine free.  
・FURUNO Authorized Distributor/Dealer  
9-52 Ashihara-cho,  
Nishinomiya, 662-8580, JAPAN  
Telephone : +81-(0)798-65-2111  
Fax  
: +81-(0)798-65-4200  
A : DEC 2002  
.
Printed in Japan  
All rights reserved.  
D : DEC. 16, 2011  
Pub. No. OME-13190-D  
(YOSH ) CSH-5L/8L  
*00080940413*  
*00080940413*  
* 0 0 0 8 0 9 4 0 4 1 3 *  
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IMPORTANT NOTICES  
General  
• The operator of this equipment must read and follow the descriptions in this manual. Wrong op-  
eration or maintenance can cancel the warranty or cause injury.  
• Do not copy any part of this manual without written permission from FURUNO.  
• If this manual is lost or worn, contact your dealer about replacement.  
• The contents of this manual and equipment specifications can change without notice.  
• The example screens (or illustrations) shown in this manual can be different from the screens  
you see on your display. The screens you see depend on your system configuration and equip-  
ment settings.  
• Save this manual for future reference.  
• Any modification of the equipment (including software) by persons not authorized by FURUNO  
will cancel the warranty.  
• All brand and product names are trademarks, registered trademarks or service marks of their  
respective holders.  
How to discard this product  
Discard this product according to local regulations for the disposal of industrial waste. For disposal  
correct method of disposal.  
How to discard a used battery  
Some FURUNO products have a battery(ies). To see if your product has a battery(ies), see the  
chapter on Maintenance. Follow the instructions below if a battery(ies) is used.  
In the European Union  
The crossed-out trash can symbol indicates that all types of batteries  
must not be discarded in standard trash, or at a trash site. Take the  
used batteries to a battery collection site according to your national  
legislation and the Batteries Directive 2006/66/EU.  
Cd  
In the USA  
The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd  
and lead-acid rechargeable batteries must be recycled. Take the used  
batteries to a battery collection site according to local laws.  
Ni-Cd  
Pb  
In the other countries  
There are no international standards for the battery recycle symbol. The number of symbols can  
increase when the other countries make their own recycle symbols in the future.  
i
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SAFETY INSTRUCTIONS  
Indicates a condition that can cause death or serious injury if  
WARNING  
not avoided.  
Indicates a condition that can cause minor or moderate injury if  
not avoided.  
CAUTION  
WARNING  
WARNING  
Use the proper fuse.  
ELECTRICAL SHOCK HAZARD  
Do not open the equipment.  
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.  
ii  
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SAFETY INSTRUCTIONS  
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)  
Type: 86-003-1011-1  
Code No.: 100-236-231  
The transducer may become damaged.  
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.  
iii  
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TABLE OF CONTENTS  
iv  
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TABLE OF CONTENTS  
8. MAINTENANCE, TROUBLESHOOTING ..............................................................8-1  
8.1 General Maintenance .................................................................................................8-1  
v
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TABLE OF CONTENTS  
APPENDIX 1 MENU TREE .......................................................................................AP-1  
INDEX..........................................................................................................................IN-1  
vi  
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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.  
Since 1948, FURUNO Electric Company has enjoyed an enviable reputation for innovative and  
dependable marine electronics equipment. This dedication to excellence is furthered by our ex-  
tensive global network of agents and dealers.  
Your scanning sonar is designed and constructed to meet the rigorous demands of the marine en-  
vironment. 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 purpos-  
es.  
Thank you for considering and purchasing FURUNO equipment.  
Features  
The FURUNO CSH-5L and CSH-8L Color Scanning Sonars are full-circle electronic scanning so-  
nars 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 con-  
ditions or specific function.  
• Target lock feature tracks fish school.  
vii  
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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
φ, 50-60Hz  
24 VDC  
System configuration of CSH-5L  
viii  
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SYSTEM CONFIGURATION  
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  
Motion Sensor  
MS-100  
Hull Unit  
CSH-8040, 600 mm stroke  
CSH-8041, 400 mm stroke  
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
Ф
, 50-60Hz  
24 VDC  
System configuration of CSH-8L  
ix  
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SYSTEM CONFIGURATION  
This page is intentionally left blank.  
x
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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.  
Lowers the transducer.  
Trackball  
Positions trackball  
mark.  
Raises the transducer.  
Turns power  
on/off.  
Sets the tilt  
angle.  
EVENT  
R/B  
FISH  
POWER  
Color Scanning Sonar  
TARGET  
LOCK  
RANGE  
GAIN  
TILT  
FISH  
STABI-  
LIZER  
OFF  
F1  
F3  
F2  
F4  
CENTER  
ALARM  
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  
OFF CENTER:  
ALARM ZONE:  
Shifts the display.  
Sets fish alarm zone.  
function key program.  
DELETE MARK: Deletes selected mark.  
MENU:  
Opens/closes menu.  
Control unit  
1-1  
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1. OPERATIONAL OVERVIEW  
1.2  
Remote Controller (option)  
The remote controller provides armchair control of the tilt, range and gain.  
Hole for hanging  
RANGE Control  
▲: Increases range.  
▼: Decreases range.  
TILT Control  
▲: Increases tilt angle.  
▼: Decreases tilt angle.  
Chooses menu item  
in menu operation.  
GAIN Control  
▲: Increases gain.  
▼: Decreases gain.  
Chooses menu option  
in menu operation.  
Remote controller  
1-2  
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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 = OK  
RAM = OK  
VRAM = OK  
EEPROM (P.W) = OK  
TRX  
1050742-XX.XX 1050733-XX.XX  
ROM = OK  
RAM = OK  
KEY-0  
1050730-XX.XX F  
ROM = OK  
RAM = OK  
Self test screen at start up (example: CSH-5L, 55 kHz transducer)  
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  
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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].  
SYSTEM MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
NORM  
MARKS  
COMBI-2  
SYSTEM  
DISPLAY MODE : COMBI-1  
TX OUTPUT : 8  
PULSE LENGTH : 8  
TX CYCLE  
TVG NEAR  
TVG FAR  
AGC  
: 10  
: 6  
: 7  
: 2  
: 1  
2ND AGC  
NOISE LIMITER : 3  
COLOR CURVE : 1  
COLOR RESPONSE : 1  
DELETE COLOR : 0  
ECHO AVERAGE : 1  
2
2
3
3
4
4
INT REJECT  
: 1  
HOR BEAMWIDTH: WIDE  
VER BEAMWIDTH : WIDE  
NARROW  
NARROW  
2
COLOR  
: 1  
3
4
ERASE MARKS : TRACK  
SHIP  
EVENT  
FISH  
ALARM LEVEL  
AUTO TRAIN  
TRAIN SECTOR : 10°  
: 9  
: ON  
OFF  
20°  
40°  
60°  
AUTO TILT  
TILT ANGLE  
TRANSMISSION : ON  
AUDIO VOLUME : 10  
ASSIGN SETTING : F1 KEY  
: ON  
2-10°  
OFF  
4-14°  
OFF  
:
6-20°  
10-26°  
F2 KEY  
F3 KEY  
F4 KEY  
ASSIGN MENU  
PRESS [MENU] KEY TO EXIT  
4. Use the RANGE control to choose [TRANSMISSION].  
: EXECUTE  
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  
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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]  
DIMMER  
: SONAR  
: 10  
SOUNDER  
MARKS  
SYSTEM  
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  
FEET  
CURRENT  
400  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FATHOMS PA/BRA  
NAV DATA GYRO+NAV  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
: 200  
PORT1 BAUDRATE: 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE: 19200  
PORT2 FORMAT : NMEA  
9600  
CIF  
9600  
CIF  
4800  
4800  
DR  
2400  
2400  
ALL  
NAV DATA  
: GPS  
LC  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
: ENGLISH  
NEDERLND  
NORSK  
LEFT  
ON  
ESPANOL DANSK  
ITALIANO  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
ECHO-4  
PANEL  
ECHO-1  
COLOR  
ECHO-2  
SET TO DEFAULT : EXECUTE  
PRESS [MENU] KEY TO EXIT  
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 de-  
crease it.  
6. Press the MENU key to close the menu.  
1-5  
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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  
Description  
Display  
NORM  
(Sonar  
display)  
This mode is useful for detecting  
and tracking fish schools. Naviga-  
tion data can be displayed in the  
text window, with connection of ap-  
propriate sensors.  
Text window  
Sonar display  
COMBI-1 Sonar picture appears on the left  
Range and bearing marks  
Text window  
(Sonar +  
Audio)  
and the audio display at the lower  
right side of the screen. This mode  
is useful analyzing echoes in a de-  
sired area.To activate the [COMBI-  
1] mode, do the following:  
Audio display  
1) Choose the [COMBI-1] mode.  
2) Use the trackball to place the  
trackball mark (+) on the bear-  
ing desired.  
Sonar display  
3) Press the R/B key. The range  
and bearing marks are in-  
scribed on the sonar picture,  
and the signal along the bear-  
ing mark appears in the audio  
display.  
COMBI-2 The sonar picture appears on the  
(Sonar +  
echo-  
left and the signal fed from the  
echosounder at the lower right side  
Text window  
sounder) of the screen. This mode is suit-  
able for judging fish school con-  
centration.  
Echosounder  
display  
Sonar display  
1-6  
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1. OPERATIONAL OVERVIEW  
Normal mode display (sonar display)  
N
733  
N
SHIP SPEED 12.4 kt  
R 1000  
708  
189  
SHIP COURSE 246°  
LAT/LON  
T 15  
(15)  
°
B
60S  
G 10.0  
32°52.150N  
132°12.150E  
DEPTH  
126m  
WATER CURRENT  
C1 1.2kt 342°  
C2 0.8kt 298°  
C3 0.4kt 256°  
W
E
Text Window  
For description  
see Chapter 5.  
WATER TEMP 12.4°C  
20min  
10  
0
500  
S
14  
12  
10  
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  
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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  
S
Bottom  
200 -  
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 so-  
nar 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  
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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 proper  
Gain too high  
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. Trans-  
mission 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 dur-  
ing 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 goes off, 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 trans-  
ducer 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  
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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 verti-  
cally, 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 op-  
erated 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°  
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. Dis-  
able 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 le-  
ver.  
To turn off automatic tilt, choose [OFF] at step 5. Note that automatic tilt range varies  
with the range in use.  
Range and tilt angle  
Range (m)  
±2-10°  
±4-14°  
±6-20°  
±10-26°  
50, 85, 100, 150, 200, 250, 300, 350  
400, 450, 500  
600, 800  
±10°  
±8°  
±6°  
±2°  
±14°  
±12°  
±10°  
±14°  
±20°  
±16°  
±14°  
±6°  
±26°  
±20°  
±20°  
±10°  
1000, 1200, 1600  
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:  
10° …  
1-10  
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1. OPERATIONAL OVERVIEW  
Tilt Angle  
Auto tilt concept  
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:  
Case 2:  
Case 3:  
Tilt angle 30 to 40 degrees  
Fish school is obscured by the bottom echo.  
Tilt angle 10 to 20 degrees  
Fish school is located above the bottom echo (midwater).  
Tilt angle 0 to 5 degrees  
Fish school is located close to the bottom echo.  
1-11  
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1. OPERATIONAL OVERVIEW  
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  
1.4.4  
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 an-  
gle 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 propa-  
gates 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  
1-12  
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1. OPERATIONAL OVERVIEW  
Sea surface  
Tilt angle 0°  
15°  
Sea surface  
Tilt angle 5-6°  
15°  
Tilt angle and surface fish (example: CSH-5L)  
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  
100  
200  
300  
0°  
(800)  
(200)  
(400)  
(600)  
20(40)  
40(80)  
5°  
60(120)  
10°  
15°  
80(160)  
100(200)  
200(400)  
300 m  
Vertical width of sonar beam  
200 m  
100 m  
78 m  
52 m  
15°  
26 m  
CSH-5L  
CSH-8L  
300 m  
200 m  
46 m  
100 m  
23 m  
68 m  
13°  
Depth, detection range and tilt angle  
1-13  
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1. OPERATIONAL OVERVIEW  
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 tar-  
get appear at the upper left corner of the sonar display.  
TRACKBALL DATA  
B
Trackball mark  
Own ship mark  
Slant range from own ship to trackball mark  
Horizontal range from own ship to trackball mark  
Depth to trackball mark  
B Relative from own ship to trackball mark*  
* = Relative bearing format may be selected with  
[OTHER MARKS] on the [MARKS] menu.  
Location of trackball data  
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.  
1-14  
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1. OPERATIONAL OVERVIEW  
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  
COMBI-2  
SYSTEM  
PULSE LENGTH : 8  
TX CYCLE  
TVG NEAR  
TVG FAR  
AGC  
2ND AGC  
: 10  
: 6  
: 7  
: 2  
: 1  
: 3  
: 1  
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  
: ON  
: 10°  
: ON  
SHIP  
EVENT  
FISH  
OFF  
20°  
OFF  
4-14°  
OFF  
40°  
60°  
TILT ANGLE  
:
2-10°  
6-20°  
10-26°  
TRANSMISSION : ON  
AUDIO VOLUME : 10  
ASSIGN SETTING : F1 KEY  
F2 KEY  
F3 KEY  
F4 KEY  
ASSIGN MENU  
: EXECUTE  
PRESS [MENU] KEY TO EXIT  
4. Use the RANGE control to choose a menu item. The selected item is highlighted.  
5. Use the GAIN control to choose the option desired.  
6. To close the menu, press the MENU key.  
1-15  
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1. OPERATIONAL OVERVIEW  
1.6.2  
Sonar menu description  
Description of sonar menu  
Item  
Description  
Ref. page  
DISPLAY MODE Chooses the display mode among, [COMBI-1] (NORM 1-6  
+ Audio), [NORM] (Sonar) and [COMBI-2] (NORM +  
Echosounder).  
TX OUTPUT  
Adjusts transmitter power.  
2-4  
2-3  
PULSE LENGTH Chooses pulse length.  
TX CYCLE  
Removes interference caused by other sonars operat- 2-6  
ing nearby.  
TVG NEAR  
TVG FAR  
AGC  
Adjusts receiving gain within 300 m.  
Adjusts receiver gain beyond 300 m.  
2-1  
2-1  
2-2  
Automatically reduces the receiver gain only against  
strong echoes such as the bottom or a large fish school,  
to suppress bottom tail.  
2ND AGC  
Suppresses bottom echo.  
2-3  
NOISE LIMITER Suppresses unwanted reflections caused by sediments 2-5  
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 bal-  
anced picture. The larger the setting the better the res-  
olution on weak signals.  
COLOR RE-  
SPONSE  
Adjusts color level against strong reflections. The high- —  
er 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  
ECHO AVER-  
AGE  
Specifies how long to leave afterglow on the screen.  
INT REJECT  
Rejects random noise and sea surface reflections in  
rough sea conditions.  
2-5  
2-7  
2-7  
HOR BEAM-  
WIDTH  
Sets horizontal beamwidth for wide or narrow.  
VER BEAM-  
WIDTH  
Sets vertical beamwidth for wide or narrow.  
COLOR  
Chooses display colors for the sonar and audio dis-  
plays, 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, 3-7  
own ship, event and fish. For track, 10% of the oldest  
track is erased.  
1-16  
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1. OPERATIONAL OVERVIEW  
Item  
Description  
Ref. page  
ALARM LEVEL  
Sets echo strength level which triggers the fish alarm. 3-3  
The lower the setting the weaker the echo which trig-  
gers the alarm.  
AUTO TRAIN  
Turns automatic transducer training on or off.  
3-2  
3-2  
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 VOLUME Sets audio volume of loudspeaker.  
3-2  
ASSIGN SET-  
TING  
Chooses function key to program.  
3-8  
ASSIGN MENU  
Displays programs assigned to function keys.  
3-9  
1-17  
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1. OPERATIONAL OVERVIEW  
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1-18  
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2. FINE TUNING THE SONAR PIC-  
TURE  
2.1  
Eliminating Unwanted Echoes  
Echoes from targets such as bottom and fish return to the transducer in order of dis-  
tance 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 dis-  
played 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, cen-  
tered at the ranges shown below.  
How TVG works  
The TVG is also used to suppress unwanted echoes and noise which appear in a cer-  
tain 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."  
9. 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 pos-  
sible. Check that the fish echo is displayed in the same color while it approaches.  
2-1  
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2. FINE TUNING THE SONAR PICTURE  
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.  
10. 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 ech-  
oes 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 bot-  
tom 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  
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2. FINE TUNING THE SONAR PICTURE  
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 hid-  
den 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. 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.  
6. Press the MENU key to close the menu.  
2-3  
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2. FINE TUNING THE SONAR PICTURE  
2.4  
Suppressing Bottom and Sea Surface Reflec-  
tions 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 aforemen-  
tioned 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 with-  
out turning down the gain. The picture becomes clearer when the output power is re-  
duced 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  
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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] (In-  
terference Rejector), [NOISE LIMITER] or [TX CYCLE] on the [SONAR] menu as ap-  
propriate.  
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 condi-  
tions. Set the interference rejector so that noise is just eliminated. Do not use an un-  
necessarily 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  
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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  
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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 lo-  
cated 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 [SO-  
NAR] 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  
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2. FINE TUNING THE SONAR PICTURE  
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2-8  
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3. ADVANCED SONAR OPERATION  
3.1  
Tracking a Fish School (target lock)  
Target lock, which requires speed and heading inputs, automatically tracks a fixed lo-  
cation (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 lo-  
cation you want to track.  
2. Press the TARGET LOCK key.  
The target lock mark appears ( ) on the echo selected and the bearing mark bi-  
sects 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 Data  
650 (Horizontal range from own ship to target)  
153 (Depth of target)  
NNE (Relative bearing to target*)  
B
Target lock  
bearing mark  
* 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.  
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
55° 55°  
Depth  
Target lock and tilt angle  
3-1  
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3. ADVANCED SONAR OPERATION  
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 de-  
tect 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 be-  
comes 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 mon-  
itor 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 vol-  
ume 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, cen-  
tered on the bearing mark.  
To turn off automatic training, choose [OFF] at step e).  
3-2  
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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 starting 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.  
3-3  
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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  
Fish Mark  
2nd Latest Fish Mark  
Latest  
Fish Mark  
Wait 1-2  
minutes  
X
FIsh Mark Data  
1076 (Horizontal range between fish marks)  
787 (Horizontal range from own ship  
to fish mark)  
Place trackball  
mark on  
Place trackball mark  
on fish echo's latest  
location and press the  
FISH key.  
fish echo and  
press the  
153 (Depth)  
FISH key.  
C
E/S (Course*)  
* 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.  
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.  
3-4  
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3. ADVANCED SONAR OPERATION  
Fish key pressed once:  
Fish key pressed twice:  
Fish key pressed three times:  
Fish key pressed four times:  
X
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 de-  
lete. 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  
OFFCENTER  
key.  
Own Ship Mark  
Trackball Mark  
How to use the off-center function  
3-5  
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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 hor-  
izontal 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 anchor-  
ing chain that extends from surface to bottom. The buoy is fixed at its present geo-  
graphical 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  
B
You observe picture from  
direction of mark.  
pressed.  
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  
3-6  
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3. ADVANCED SONAR OPERATION  
Each time the key is pressed the appearance of the event marks changes as be-  
low. Ten marks may be entered. When this amount is exceeded the oldest event  
mark is automatically erased.  
This data is used to display  
First press of the EVENT key  
latest event mark data.  
2nd press of the EVENT key  
1
3rd press of the EVENT key  
2
3
1
2
4th press of the EVENT key  
1
Latest Event Mark  
Past 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 (U)  
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.  
3.7  
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]:  
[SHIP]:  
The oldest 10% of the ship's track is erased with each press of the  
EVENT key.  
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.  
3-7  
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3. ADVANCED SONAR OPERATION  
3.8  
Function Keys (F1-F4)  
A function key may be programmed two ways: set up the equipment according to fish-  
ing ground or target fish, or provide a shortcut for a menu item on the [SONAR] or  
[SOUNDER] menu.  
Sonar Menu Item  
Function Key  
F2 F3  
F1  
F4  
Default program  
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
8
7
10  
6
10  
10  
10  
5
8
7
10  
6
10  
10  
10  
5
F1: Short-range detection  
F2: Long-range detection  
F3: Short-range detection  
F4: Long-range detection  
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 pro-  
gram, or a dialog box appears in case of shortcut operation. For shortcut opera-  
tion, 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 op-  
tion. (Be sure to press the function key within five seconds; the dialog box is au-  
tomatically 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].  
7. Use the GAIN control to choose the function key (F1-F4) you want to program.  
8. Press the EVENT key to program.  
The message shown below appears.  
ARE YOU SURE TO CHANGE?  
PRESS [EVENT] KEY TO EXECUTE  
NO  
YES  
9. Use the GAIN control to choose [YES].  
10. Press the EVENT key again.  
The function key selected at step 7 is programmed.  
11. Press the MENU key to close the menu.  
3-8  
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3. ADVANCED SONAR OPERATION  
For detecting midwater fish  
Useful programs (main items only)  
For detecting surface fish  
For detecting bottom fish  
TX OUTPUT  
TX OUTPUT  
8
7
TX OUTPUT  
PULSE LENGTH  
TX CYCLE  
8
PULSE LENGTH  
TX CYCLE  
7
PULSE LENGTH  
TX CYCLE  
5
8
10  
5
10  
5
10  
TVG NEAR  
TVG NEAR  
TVG FAR  
TVG NEAR  
TVG FAR  
6
TVG FAR  
5
6
7
HOR BEAMWIDTH  
VER BEAMWIDTH  
COLOR CURVE  
COLOR RESPONSE  
Narrow HOR BEAMWIDTH  
Narrow VER BEAMWIDTH  
Narrow HOR BEAMWIDTH  
Narrow  
Wide  
VER BEAMWIDTH  
COLOR CURVE  
Wide  
1
3
COLOR CURVE  
4
1
3
3
COLOR RESPONSE  
COLOR 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], [AS-  
SIGN SETTING] and [ASSIGN MENU] from the [SONAR] menu and [DRAFT] from  
the [SOUNDER] menu.  
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.  
3.8.4  
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.  
3-9  
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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 proce-  
dure below to use the stabilizer feature.  
Tilt angle  
Stabilizer activated  
on front beam  
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  
No pitching  
and rolling  
Ship is pitching and  
rolling  
Stabilizer turned ON  
(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.  
STAB  
Stabilizer ON  
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 sta-  
bilizer works on the bearing selected for the target lock feature (target lock func-  
tion 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. To turn off the stabilizer, press the STABILIZER key. The stabilizer mark, stabiliz-  
er 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.  
3-10  
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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 de-  
sired 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.  
4-1  
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4. ECHOSOUNDER MODE  
3. Use the GAIN control to choose [SOUNDER].  
SOUNDER MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
[MENU MODE]  
: SONAR  
SOUNDER  
2
MARKS  
3
SYSTEM  
4
COLOR  
: 1  
RANGE  
SHIFT  
: 160  
: 0  
E/S INT REJECT : ON  
OFF  
GAIN  
: 3.0  
CLUTTER  
ADVANCE  
: 2.0  
: 2/1  
1/8  
: LINEAR  
1/1  
1
1/2  
2
1/4  
3
COLOR CURVE  
DELETE COLOR : 0  
DRAFT  
: 0.0(m)  
PRESS [MENU] KEY TO EXIT  
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. Use the GAIN control to adjust gain (setting range: 0.0-10.0).  
6. Press the MENU key to close the menu.  
4-2  
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4. ECHOSOUNDER MODE  
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. 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" dis-  
plays one scan line per two transmissions.  
6. 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  
SHIP COURSE 246°  
T 15  
°
LAT/LON  
32°52.150N  
132°12.150E  
(159  
G 10.0  
B 60S  
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  
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4. ECHOSOUNDER MODE  
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. 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.)  
6. Press the MENU key to close the menu.  
4-4  
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4. ECHOSOUNDER MODE  
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.  
4.8  
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  
COLOR  
Description  
Ref. page  
Choose one of four display color patterns, according to your environ-  
ment.  
COLOR CURVE Adjusts echo presentation color curve against strong reflections. For  
example, setting "1" averages weak to strong signals to obtain a bal-  
anced 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).  
4-5  
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4. ECHOSOUNDER MODE  
This page is intentionally left blank.  
4-6  
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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  
Trackball Mark Data  
Range  
Slant Range  
Horizontal Range  
Depth  
Tilt Angle  
Stabilizer  
On*  
(Auto Tilt value)  
Gain  
Function Key Number  
Heading*  
B Relative Bearing*  
TX OFF STAB  
R 1000  
372 freeze  
359  
N
SHIP SPEED 12.4 kt  
Speed*  
N
R 1000  
T 15  
°
96  
SHIP COURSE 246°  
LAT/LON  
Course*  
2nd Latest Fish  
Stablilizer  
(15)  
G 10.0  
F1  
B 60S  
Fish Mark* Mark*  
Mark*  
Fish Mark*  
32°52.150N  
132°12.150E  
Range Mark  
Position*  
Depth*  
Heading Mark  
Bearing  
Mark  
Trackball Mark  
DEPTH  
126m  
Latest Event  
Mark*  
WATER CURRENT  
Current Data  
(current speed  
and direction  
for 3 layers)*  
North Mark*  
Own Ship  
C1 1.2kt 342°  
C2 0.8kt 298°  
C3 0.4kt 256°  
W
E
Bearing  
Scale  
1
3
Mark  
Current Mark*  
Event Mark*  
2
Target Lock  
Mark*  
1
Own Ship Position  
Mark*  
Temperature*,  
Temperature  
Graph*  
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  
Note: No or  
missing  
Bearing Mark  
450  
15  
data in text  
window  
S
S 10.5kt  
(m) C ESE  
( 121)  
R 450 B 224°  
B NW  
shown with  
asterisks.  
Target Lock Data* Fish Mark Data*  
Event Mark Data*  
Horizontal Range  
Depth  
( ) Depth at time of entry  
B True Bearing*  
Range between  
fish marks  
Range to fish  
mark  
238  
Range and  
Bearing Data  
Range  
Depth  
557  
149  
493  
B SW/W Bearing  
Depth  
132  
S 10.5kt  
Speed  
* = Requires appropriate sensor.  
Temperature Graph  
Course  
(m) C ESE  
20min  
10  
0
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.  
14  
12  
10  
Temperature  
data regained  
Temperature data lost  
Marks and data on the normal display  
5-1  
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5. MARKS AND DATA  
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  
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.  
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°.  
Heading  
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: , slant range; , Horizontal range; , Depth,  
B, Bearing. Appears at top left corner of the sonar display.  
Trackball Mark Data  
B
Relative bearing  
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  
R
Range setting, selected with the RANGE control, appears at top  
right corner of the sonar display.  
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  
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.  
T
°
(
)
Gain  
The gain chosen with the GAIN control appears on the top right  
corner of the sonar display.  
G
Function Key Number  
F
Function key number appears at the top right corner of the sonar  
display.  
* = Requires appropriate sensor.  
5-2  
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5. MARKS AND DATA  
Description of marks and data on the normal display (con't from previous page)  
Mark/Data  
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.  
Range Rings  
500  
Electronic Bearing  
Scale*  
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.  
N
W
E
S
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.  
Ship's Track Mark*  
3
2
Current  
Mark*  
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.  
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.  
°
.
N
°
.
E
Latitude range: 90°00.000S to 90°00.000N  
Longitude range: 179°59.999S to 179°59.999E, 180°00.000  
Nav Data*  
With appropriate sensors, speed, course, water depth and  
water temperature can be displayed in the text window.  
Speed range: 0.0-40 kts  
SHIP SPEED:  
SHIP COURSE:  
.
kt  
°
Course range: 0-359°  
Depth range: 0-9999 m (same range for any depth unit)  
Water temperature range: -10.0 to 40.0 °C  
DEPTH:  
WATER TEMP:  
m
°
.
Target Lock Mark*  
The target lock mark automatically tracks the fish school selected  
by the operator. This function requires speed and heading data.  
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  
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5. MARKS AND DATA  
Description of marks and data on the normal display (con't from previous page)  
Mark/Data  
Description  
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.  
Latest Event Mark  
Event Mark  
1
. . .  
1
2
3
9
Latest  
Event  
Mark  
Past Event Marks (Max. 9)  
Latest Event Mark Data  
The position data of the latest event mark, that is, horizontal range  
(→), depth (↓) and bearing. ( ) shows the latest event mark's  
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
°
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:  
Latest Fish Mark  
2nd Latest Mark  
Fish Mark  
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 (R) and bearing (B) marks data are shown at the bottom of the  
display when the range and bearing marks are displayed.  
Range and Bearing  
Marks Data  
R
B
°
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.  
Stabilizer  
mark  
5-4  
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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  
500  
200 -  
-
205  
Depth to  
cross-hair cursor  
intersection *3  
S
300-  
R 552 B 60S  
Depth Scale *4  
Range and Bearing Data  
* = Requires appropriate sensor.  
*1 = Water current data may be displayed  
instead of temperature graph.  
See [DISP SELECT] on the [SYSTEM]  
menu.  
*2 = Echosounder display only  
*3 = Depth on echosounder display;  
range on audio display.  
*4 = Depth scale on echosounder  
display; range scale on audio  
display.  
WATER CURRENT  
Note: Range and bearing marks  
are used to choose the  
location to display in the  
audio display.  
C1 1.2kt 342°  
C2 0.8kt 298°  
C3 0.4kt 256°  
WATER TEMP  
12.4°C  
Marks and data on the echosounder and audio displays  
5-5  
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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.  
Depth Scale, Range  
Scale  
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  
[COMBISCALE] on the [SYSTEM] menu.  
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  
The net sonde marks are orange horizontal lines (solid or dashed  
line) which mark the location of the net sonde fed from the  
echosounder.  
Net Sonde Mark*  
(Echosounder display  
only)  
5-6  
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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) Solping 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  
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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  
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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 of-  
ten 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  
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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 wa-  
ter 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 inter-  
ference from ultrasonic equipment such as an echo sounder, sonar, etc. on board oth-  
er 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  
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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]  
RANGE RINGS  
: SONAR  
SOUNDER  
1/2R  
MARKS  
OFF  
SYSTEM  
: 1/4R  
BEARING SCALE : ON  
CURRENT VECTOR : ON  
OFF  
OFF  
CURRENT DIR  
SHIP'S TRACK  
COURSE  
HEADING  
CURRENT DATA : 32CMPS  
: TO  
: 10R  
: 32CMPS  
: 32CMPS  
FROM  
5R  
OFF  
360TRUE  
360TRUE  
360TRUE  
360TRUE  
360°  
OFF  
180°  
180°  
360°  
360°  
EVENT/FISH  
OTHER MARKS  
: 32CMPS  
: 180°  
POSITION DATA : L/L  
TD  
PRESS [MENU] KEY TO EXIT  
7-1  
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7. MARKS AND SYSTEM MENUS  
MARKS menu description  
Item  
Description  
Ref. Page  
RANGE RINGS  
Turns the range rings on/off and chooses range ring inter-  
val, 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.  
5-3  
5-3  
CURRENT VEC-  
TOR  
Turns the current (tide) mark on/off.  
CURRENT DIR  
Turns current (tide) data on or off. "FROM" shows what di-  
rection the current is flowing; "TO" shows the direction the  
current is heading. Requires a current indicator.  
5-3  
Current Mark  
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, re-  
spectively.  
5-3  
COURSE  
HEADING  
Chooses how to display course, in 32 compass points or  
360° true.  
5-3  
5-2  
5-3  
Chooses how to display heading, in 32 compass points or  
360° true.  
CURRENT DATA Choose how to display current (tide) data, 32 compass  
points, 360° true, ±180° or 360° relative.  
EVENT/FISH  
Choose how to display event and fish marks, 32 CMPS,  
360° TRUE, ±180° or 360°. For ±180°," starboard direc-  
Event MK: 5-5  
Fish MK: 5-4  
tion is shown as "xxxS" and port direction as "xxxP." True Tgt Lock MK: 5-3  
requires a heading sensor. 32 CMPS shows direction in  
compass points such as N, N/E, NNE, NE/N, etc.  
OTHER MARKS  
Chooses how to display other marks, ±180° or 360°.  
R/B MK: 5-4  
Trackball MK: 5-2  
POSITION DATA Chooses how to display position, in latitude and longitude  
or Loran TDs.  
5-3-  
7-2  
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7. MARKS AND SYSTEM MENUS  
7.2  
SYSTEM Menu  
SYSTEM MENU  
(RANGE CTRL: U/D, GAIN CTRL: L/R)  
**  
**  
: SONAR  
: 10  
[MENU MODE]  
DIMMER  
SOUNDER  
MARKS  
SYSTEM  
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  
FEET  
CURRENT  
400  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FATHOMS PA/BRA  
NAV DATA GYRO+NAV  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
: 200  
PORT1 BAUDRATE: 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE: 19200  
PORT2 FORMAT : NMEA  
9600  
CIF  
9600  
CIF  
4800  
4800  
DR  
2400  
2400  
ALL  
NAV DATA  
: GPS  
LC  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
: ENGLISH  
NEDERLND  
NORSK  
LEFT  
ON  
ESPANOL DANSK  
ITALIANO  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
ECHO-4  
PANEL  
ECHO-1  
COLOR  
ECHO-2  
SET TO DEFAULT : EXECUTE  
PRESS [MENU] KEY TO EXIT  
Description of [SYSTEM] menu  
Item  
Description  
Ref. Page.  
1-5  
DIMMER  
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 head-  
ing 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  
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7. MARKS AND SYSTEM MENUS  
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 da-  
ta. The transducer may be retracted at a speed different from  
set here if the speed data is wrong. Reduce the ship's speed be-  
low 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 indica-  
tor, 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.  
5-6  
COMBI SCALE  
Chooses the location of the depth scale and distance scale in  
the combination displays, right or left side.  
SUB TEXT INDI  
LANGUAGE  
For use by service technicians. Normally turn this indication off.  
Choose the language to display among English, Japanese, Ko-  
rean and several European languages.  
TEST  
Chooses the test to execute.  
8-7  
SET TO DEFAULT Restores all default settings, including controls. Choose this  
item and then press the EVENT key to restore all default set-  
tings.  
7-4  
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8. MAINTENANCE,  
TROUBLESHOOTING  
NOTICE  
WARNING  
D
o not apply paint, anti-corrosive  
ELECTRICAL SHOCK HAZARD  
Do not open the equipment.  
sealant or contact spray to plastic  
parts or equipment coating.  
This equipment uses high  
voltage that can cause  
electrical shock.  
0nly qualified persons can  
work inside the equipment.  
Those items contain products that can  
damage plastic parts and equipment  
coating.  
8.1  
8.2  
General Maintenance  
This equipment is designed and constructed to provide many years of trouble-free per-  
formance 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.  
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  
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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  
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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  
Gear cover  
(M4 X 8,  
4 pcs.)  
Screw shaft gear  
Motor gear  
OFF  
ON  
POWER switch  
Hull unit  
3. Mount the hand crank onto the screw shaft gear or motor gear.  
b) Mounting hand crank  
on motor gear  
(Requires less force but  
greater number of turns.)  
a) Mounting hand crank  
on screw shaft gear  
(Requires greater force but  
smaller number of turns.)  
Hand crank  
Motor gear  
Fix with screw  
(Use cover fixing screw.)  
Fix with screw  
(Use cover fixing screw.)  
Screw shaft gear  
120 turns to move main shaft  
by 600 mm.  
210 turns to move main shaft  
by 600 mm.  
Hand crank  
4. Turn the hand crank clockwise to raise the transducer.  
8-3  
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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, equip-  
ment 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  
FGBO-A 2A AC125V  
FGMB 2A 250V  
Code No.  
000-549-062  
000-122-000  
000-549-013  
000-122-000  
000-546-707  
Processor Unit  
Transceiver Unit  
(100 VAC spec.)  
FGBO 7A AC125V  
FGMB 2A 250V  
Transceiver Unit  
(220 VAC spec.)  
FGBO 4A AC250V  
8.5  
Fan Replacement  
The processor unit has a fan, and its life is about 25,000 hours, in ambient tempera-  
ture of 50°C.  
If the fan stops, because the area around the power supply is too hot, the power volt-  
age 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  
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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 • Check power cable.  
power  
• Check ship's mains.  
• First check the fuse in the processor unit. If it is OK, have a qual-  
ified technician check the fuse in the transceiver unit.  
Bottom echo be-  
comes 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 [SO-  
NAR] menu.  
Somewhat strange • Brilliance too low. Adjust display brilliance.  
color  
Picture contains  
noise  
• Equipment not grounded properly. Check equipment ground.  
• Power cable is too close to the signal cable. Relocate power ca-  
ble 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  
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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  
RETRACT TRANSDUCER AND TURN OFF  
Excessive voltage detected. The message flash-  
es and the audio alarm sounds. Retract the  
POWER. PRESS R/B KEY TO CLEAR ALARM. transducer and then turn off the power. Press the  
R/B key to silence the audio alarm. Have a tech-  
nician check the set.  
Transducer not retracted  
TRANSDUCER NOT RETRACTED  
CUT OFF POWER LINE TO PROCESSOR  
AND POWER SUPPLY. PRESS R/B KEY TO  
CLEAR ALARM.  
If the transducer is not retracted into the tank in  
approx. 30 seconds after the key is pressed,  
the message flashes and the 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.  
MAX ALLOWABLE SPEED FOR EXTENDED  
TRANSDUCER IS 16 KT. MAX ALLOWABLE  
SPEED DURING RAISING/LOWERING  
TRANSDUCER IS 16 KT. PRESS R/B KEY TO Reduced speed to less than 16 knots, and the  
CLEAR ALARM.  
previously used display appears.If you attempt  
to lower the transducer when the speed is higher  
than 16 knots the message flashes and the au-  
dio alarm sounds. (The transducer is neither  
raised nor lowered.)  
WARNING  
Ship's speed is higher than 18 knots with the  
TRANSDUCER IS KEPT EXTENDEDREDUCE transducer extended. The message flashes and  
SHIP'S SPEED AND PRESS TO RETRACT  
TRANSDUCER. ACTIVATING AUTOMATIC  
RETRACTION. PRESS R/B KEY TO CLEAR  
MESSAGE.  
the audio alarm sounds. Press the R/B key to si-  
lence the audio alarm. Lower speed below 18  
knots, and the previously used display appears.  
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 RE-  
TRACT] in the [SYSTEM] menu is turned on.)  
Press the R/B key to clear the message.  
8-6  
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8. MAINTENANCE, TROUBLESHOOTING  
8.8  
Diagnostic Tests  
This unit has 10 diagnostic tests (eight with the CSH-8L) which check it for proper per-  
formance. 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)  
**  
**  
: SONAR  
: 10  
[MENU MODE]  
DIMMER  
SOUNDER  
MARKS  
SYSTEM  
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  
FEET  
CURRENT  
400  
AUTO TILT SPD  
UNIT  
: LOW  
: METERS  
FATHOMS PA/BRA  
NAV DATA GYRO+NAV  
SHIP'S SPD/BR  
LOG PULSE  
:
LOG/GYRO  
: 200  
PORT1 BAUDRATE: 19200  
PORT1 FORMAT : NMEA  
PORT2 BAUDRATE: 19200  
PORT2 FORMAT : NMEA  
9600  
CIF  
9600  
CIF  
4800  
4800  
DR  
2400  
2400  
ALL  
NAV DATA  
: GPS  
LC  
COMBI SCALE  
SUB TEXT INDI  
LANGUAGE  
: RIGHT  
: OFF  
: ENGLISH  
NEDERLND  
NORSK  
LEFT  
ON  
ESPANOL DANSK  
ITALIANO  
TEST  
: SINGLE  
: PATTERN  
ECHO-3  
CONTI  
SIO  
ECHO-4  
PANEL  
ECHO-1  
COLOR  
ECHO-2  
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  
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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 indi-  
cated 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.  
*** : 742 (CSH-5L 55 kHz, 68  
kHz)  
Control unit's program  
version no. and results  
of ROM and RAM tests.  
0 = Version No. of Board  
735 (CSH-8L 85 kHz)  
736 (CSH-8L 107 kHz)  
### : 733 (CSH-5L 55 kHz)  
734 (CSH-5L 68 kHz9  
735 (CSH-8L 85 kHz)  
736 (CSH-8L 107 kHz)  
: DIP SW setting  
F
Continuous test (example: CSH-5L, 55 kHz transducer)  
8-8  
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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 co-  
ordinates 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  
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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  
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  
8-10  
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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  
DISPLAY ECHO TEST  
conducted with the COMBI-2 mode  
active, artificial echoes are shown in  
the echosounder display to test the  
ES interface.  
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  
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.  
Echo-4  
TRX ECHO TEST  
PRESS [MENU] KEY TO EXIT  
Echo tests  
8-11  
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8. MAINTENANCE, TROUBLESHOOTING  
This page is intentionally left blank.  
8-12  
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APPENDIX 1 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  
MENU key  
DISPLAY MODE (COMBI-1, NORM, COMBI-2)  
TX OUTPUT (0-10, 8)  
(SONAR  
selected from  
MENU MODE)  
PULSE LENGTH (0-10, 8)  
TX CYCLE (0-10, 10)  
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  
MENU key  
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)  
(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  
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APPENDIX 1 MENU TREE  
Marks menu  
MENU key  
RANGE RINGS (1/4R , 1/2R, OFF)  
BEARING SCALE (ON, OFF)  
CURRENT VECTOR (ON, OFF)  
CURRENT DIR (TO, FROM)  
SHIP'S TRACK (10R, 5R, OFF)  
COURSE (32CMPS, 360TRUE)  
(MARKS  
selected from  
MENU MODE)  
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  
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)  
(SYSTEM  
selected from  
MENU MODE)  
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  
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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  
High power MOS FET amplifier with 11-step power reduction switch  
Low noise superheterodyne, Continuously scanning beam forming  
TVG, AGC  
2.4 TX frequency  
2.5 Range  
CSH-5L: 55 kHz or 68 kHz, CSH-8L: 85 kHz or 107 kHz  
Range (m)  
Basic  
Single  
Echo Sounder Combination  
Range (m)  
Offcenter  
“OFF”  
Offcenter  
Offcenter  
“OFF”  
Offcenter  
“ON”  
“ON”  
80  
50  
85  
65  
110  
130  
195  
260  
325  
390  
455  
520  
585  
650  
780  
1040  
1300  
1560  
2080  
50  
85  
65  
110  
130  
195  
260  
325  
390  
455  
520  
585  
650  
780  
1040  
1300  
1560  
2080  
135  
160  
240  
320  
400  
480  
560  
640  
720  
800  
960  
1280  
1600  
1920  
2560  
100  
150  
200  
250  
300  
350  
400  
450  
500  
600  
800  
1000  
1200  
1600  
100  
150  
200  
250  
300  
350  
400  
450  
500  
600  
800  
1000  
1200  
1600  
SP - 1  
E1319S01E-M  
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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 external 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  
400 mm: 14 s, 600 mm: 20 s  
Remote electric control  
3.2 Raising/lowering time  
3.3 Driving system  
3.4 Allowable ship’s speed 18 knots max. (16 knots during raise/lower operation)  
4
INTERFACE  
4.1 Input 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  
4.2 Log, E/S, KP  
Speed log pulse (contact signal): 200/400 pulse/NM  
Sonde, E/S signal: VI-1100A applicable  
External KP: Current loop, 0 to 12V  
4.3 Output data  
4.4 Video signal output  
Method  
NMEA 0183 Ver1.5/2.0/2.2  
TLL  
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: 4.0-2.0A, 1 phase, 50-60 Hz  
100/115/200/220/240 VAC: 4.5-2.2A, 1 phase, 50-60 Hz  
Required for 24 VDC  
CSH-8L  
5.2 Inverter  
6
ENVIRONMENTAL CONDITION  
6.1 Ambient temperature  
6.2 Relative humidity  
6.3 Degree of protection  
0°C to +50°C  
95% at 40°C  
Processor/ control unit IPX2 (w/o connector panel of processor unit)  
SP - 2  
E1319S01E-M  
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Others  
IPX0  
6.4 Vibration  
IEC 60945 Ed.4  
7
COATING COLOR  
7.1 Processor unit  
7.2 Control unit  
7.3 Transceiver/hull unit  
2.5GY5/1.5  
N3.0  
2.5G7/2  
SP - 3  
E1319S01E-M  
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SP - 4  
E1319S01E-M  
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INDEX  
Function keys  
Numerics  
operating ................................................. 3-8  
Fish alarm ................................................. 3-3  
FISH ALARM key...................................... 3-3  
FISH key ................................................... 3-4  
FISH marks  
deleting all............................................... 3-7  
deleting individual.................................... 3-5  
entering ................................................... 3-4  
Function keys  
2ND AGC .................................................. 2-3  
A
AGC .......................................................... 2-2  
ALARM ZONE key .................................... 3-3  
Audio volume .......................................... 1-17  
Auto retraction........................................... 7-4  
Auto tilt .................................................... 1-10  
Auto train................................................... 3-2  
B
programming........................................... 3-9  
Fuse replacement ..................................... 8-4  
Beamwidth ................................................ 2-7  
Bearing scale ............................................ 7-2  
G
Gain  
C
Clutter........................................................ 4-4  
Color (sonar) ........................................... 1-16  
Color curve  
echosounder ........................................... 4-2  
sonar ....................................................... 1-9  
GAIN control (sonar) ................................. 1-9  
echosounder ........................................... 4-5  
sonar ..................................................... 1-16  
Color response (sonar) ........................... 1-16  
Color test................................................. 8-10  
Continuous test ......................................... 8-8  
Control unit................................................ 1-1  
Current vector, direction............................ 7-2  
H
Heading adjustment .................................. 7-3  
Hull............................................................ 8-2  
I
Interference rejector  
echosounder mode ................................. 4-4  
sonar ....................................................... 2-5  
D
K
Default settings ......................................... 7-4  
DELETE MARK key ...........................3-5, 3-7  
Deleting marks .......................................... 3-7  
Depth measurement (echosounder mode) 4-3  
Diagnostics  
Keying pulse.............................................. 7-4  
L
Language .................................................. 7-4  
Log pulse................................................... 7-4  
choosing.................................................. 8-7  
color test................................................ 8-10  
continous test.......................................... 8-8  
echo tests.............................................. 8-11  
panel test................................................. 8-9  
pattern test ............................................ 8-10  
single test................................................ 8-8  
SIO test ................................................. 8-10  
DIMMER.................................................... 1-5  
Display mode ............................................ 1-6  
Draft (sonar).............................................. 4-5  
M
Maintenance  
cleaning................................................... 8-1  
fan replacement ...................................... 8-4  
fuse replacement..................................... 8-4  
hull unit.................................................... 8-2  
raising transducer manually .................... 8-3  
Marks  
deleting collectively ................................. 3-7  
description............................................... 5-1  
MARKS menu ........................................... 7-1  
MENU tree ..............................................AP-1  
E
Echo averaging ......................................... 2-7  
Echo tests ............................................... 8-11  
Error messages......................................... 8-6  
EVENT key................................................ 3-6  
Event marks  
deleting.................................................... 3-7  
deleting all............................................... 3-7  
entering ................................................... 3-7  
N
Nav data source........................................ 7-4  
Noise limiter .............................................. 2-5  
O
OFF CENTER key..................................... 3-5  
Own ship position mark  
deleting.................................................... 3-7  
entering ................................................... 3-6  
F
Fan replacement ....................................... 8-4  
IN-1  
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P
Panel test...................................................8-9  
Pattern test...............................................8-10  
Picture advance speed  
(echosounder mode).................................4-3  
Ports format ...............................................7-4  
POWER switch ..........................................1-3  
Pulse length ...............................................2-3  
R
R/B key ......................................................3-2  
Range  
echosounder ............................................4-1  
sonar ........................................................1-8  
RANGE control ..........................................1-8  
Range ring interval.....................................7-2  
Remote controller.......................................1-2  
S
Single test ..................................................8-8  
SIO test....................................................8-10  
SONAR menu ..........................................1-14  
SOUNDER menu.......................................4-5  
Speed message.........................................7-4  
STABILIZER key......................................3-10  
System configuration ..................................viii  
SYSTEM menu ..........................................7-3  
T
Target lock .................................................3-1  
TARGET LOCK key ...................................3-1  
Tilt angle  
automatic................................................1-10  
surface fish.............................................1-12  
TILT lever.................................................1-10  
Tilt speed ...................................................7-4  
Track  
deleting.....................................................3-7  
length .......................................................7-2  
Train sector................................................3-2  
Transducer  
lowering....................................................1-3  
retracting ..................................................1-9  
TRANSDUCER switch (down) ...................1-3  
TRANSDUCER switch (up)........................1-9  
Ttransmission.............................................1-4  
TVG............................................................2-1  
TX cycle .....................................................2-6  
TX output ...................................................2-4  
U
Units...........................................................7-4  
W
Weak echo deletion (sonar).......................4-5  
IN-2  
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