COLOR SCANNING SONAR
CSH-53
MODEL
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Your Local Agent/Dealer
9-52 Ashihara-cho,
Nishinomiya, Japan
Telephone : 0798-65-2111
Telefax :
0798-65-4200
FIRST EDITION : JUL. 1997
Printed in Japan
All rights reserved.
D
: APR. 04,2002
PUB.No. OME-13070
*00080807300*
*00080807300*
* 0 0 0 8 0 8 0 7 3 0 0 *
( DAMI )
CSH-53
*OME13070D00*
*OME13070D00*
* O M E 1 3 0 7 0 D 0 0 *
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TABLE OF CONTENTS
FOREWORD
A Word to CSH-53 Owners ...................................................................................................... v
Features..................................................................................................................................... v
System Configuration .............................................................................................................. vi
CONTROL DESCRIPTION
Control Layout on Display Unit and Remote Control Box ...................................................1-1
Main Panel.............................................................................................................................1-2
Sub Panel 1 ............................................................................................................................1-4
Sub Panel 2 (data setting window) ........................................................................................1-5
Remote Control Box ..............................................................................................................1-8
OPERATIONAL OVERVIEW
Turning the Power On/Off .....................................................................................................2-1
Adjusting Screen Brilliance, Control Panel Backlighting .....................................................2-1
Lowering the Transducer .......................................................................................................2-1
Selecting a Display Mode......................................................................................................2-2
Selecting a Display Range .....................................................................................................2-3
Setting the Tilt Angle .............................................................................................................2-3
Adjusting the Gain.................................................................................................................2-7
Measuring Range and Bearing to a Target.............................................................................2-7
FINE TUNING THE PICTURE
Eliminating Unwanted Feeble Echoes...................................................................................3-1
Suppressing Seabed Tail ........................................................................................................3-3
Suppressing Seabed and Sea Surface Reflections in Shallow Waters ...................................3-4
Rejecting Sonar Interference and Noise ................................................................................3-4
MARKS AND DATA
Marks, Data and Display Mode .............................................................................................4-1
Permanently Displayed Marks and Data ...............................................................................4-3
Erasable Marks and Data .......................................................................................................4-4
MENU OVERVIEW
USER Menu Operation..........................................................................................................5-1
USER Menu Description .......................................................................................................5-3
SYSTEM Menu Description .................................................................................................5-5
DATA SET Menu Description...............................................................................................5-8
INIT SET/TEST Menu Description.....................................................................................5-11
ii
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FUNCTION KEYS
Programming the Function Keys ...........................................................................................6-1
Replaying a Function Key .....................................................................................................6-1
Function Key Fine Tuning .....................................................................................................6-2
Saving Function Key Settings to a Memory Card .................................................................6-3
Replaying Function Key Settings from a Memory Card .......................................................6-3
ADVANCED LEVEL OPERATION
Finding Fish School Center ...................................................................................................7-1
Tracking a Fish School ..........................................................................................................7-2
Detecting Fish Schools Aurally .............................................................................................7-7
The Fish Alarm ......................................................................................................................7-8
Relocating Fish School for Easy Observation .......................................................................7-9
Comparing of Fish School Concentration ...........................................................................7-10
Measuring Fish School Speed .............................................................................................7-11
The Event Mark ...................................................................................................................7-12
True Motion Display............................................................................................................7-14
Plotting Net Location Mark .................................................................................................7-15
Observing Net Behavior ......................................................................................................7-16
Reducing Sea Surface Reflections.......................................................................................7-17
Boosting Tx Power ..............................................................................................................7-17
PORT/STARBOARD, HORIZONTAL SLICE DISPLAYS
Port/Starboard Display ..........................................................................................................8-1
Horizontal Slice Display........................................................................................................8-2
SAVING, REPLAYING PICTURE
Initializing Memory Cards.....................................................................................................9-1
Saving the Picture ..................................................................................................................9-2
Transferring Echo Data from Internal Memory to Memory Card .........................................9-2
Saving Net Shooting Data .....................................................................................................9-3
Replaying Saved Data ...........................................................................................................9-4
Deleting Memory Card Contents...........................................................................................9-4
TURNING MARKS, DATA ON/OFF ..................................................................10-1
INTERPRETING THE DISPLAY
Seabed Echoes .....................................................................................................................11-1
Fish Schools.........................................................................................................................11-2
Sea Surface Reflections .......................................................................................................11-3
Wake ....................................................................................................................................11-3
False Echo by Sidelobe........................................................................................................11-4
Noise and Interference .........................................................................................................11-4
iii
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WARNINGS
Overvoltage Warning ...........................................................................................................12-1
Unretracted Transducer Warning .........................................................................................12-1
SELF TESTS
Opening the Self Test Menu ................................................................................................13-1
Self Test Description............................................................................................................13-2
Interface Unit CS-120A Self Test ........................................................................................13-5
INPUT DATA SELECTION
Selection of Data on Interface Unit CS-120A .....................................................................14-1
Setting Distances Between Net Sonde Transmitters............................................................14-2
MAINTENANCE
Display Unit Maintenance ...................................................................................................15-1
Hull Unit Maintenance ........................................................................................................15-2
MENU TREE ..................................................................................................................A-1
SPECIFICATIONS..................................................................................................... SP-1
INDEX.............................................................................................................................. IN-1
iv
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FOREWORD
A Word to CSH-53 Owners
Congratulations on your choice of the FURUNO CSH-53 Color Scanning Sonar. We are
confident you will see why the FURUNO name has become synonymous with quality and
reliability.
For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for qual-
ity marine electronics equipment. This dedication to excellence is furthered by our exten-
sive global network of agents and dealers.
This equipment is designed and constructed to meet the rigorous demands of the marine
environment. However, no machine can perform its intended function unless operated and
maintained properly. Please carefully read and follow the recommended procedures for op-
eration and maintenance.
We would appreciate hearing from you, the end-user, about whether we are achieving our
purposes.
Thank you for considering and purchasing FURUNO equipment.
Features
The FURUNO CSH-53 Color Scanning Sonar is a full-circle, multibeam electronic scan-
ning sonar which detects and instantaneously displays fish schools and underwater condi-
tions in 16 colors on a 15" non-glare, high resolution CRT screen.
The main features of the CSH-53 are
• Vivid 16-color display provides intuitive recognition of seabed and concentration, distri-
bution and volume of fish schools.
• Markers and indications keep the operator abreast of fishing conditions.
• Remote control box provides for armchair control of major functions.
• New gain, range or tilt setting appears in large characters whenever corresponding con-
trol is adjusted.
• Function keys automatically setup the equipment to perform specific task.
• High power MOS FET transmitter ensures reliable operation under any condition.
v
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System Configuration
STANDARD
OPTION
REMOTE DISPLAY
CSH-106
SUB DISPLAY
CSH-536
REMOTE CONTROL BOX
CSH-135
DISPLAY UNIT
CSH-530
SHIP’S MAINS
100 VAC, 1∅,
50/60 Hz
SHIP’S MAINS
100 VAC, 1∅,
50/60 Hz
TRANSMITTER UNIT
CSH-551
110/115/220/230 VAC,
1∅, 50/60 Hz
STEP-DOWN
TRANSFORMER
PT-400
INTERFACE UNIT
CS-120A
SPEED LOG
HULL UNIT
(w/RECEIVER UNIT) CSH-552
AD CONVERTER
NAVIGATOR
CURRENT INDICATOR
COLOR VIDEO SOUNDER
VI-1100A
INTERFACE UNIT
ECHO SOUNDER, COLOR
VIDEO SOUNDER
FNZ JOINT BOX
CS-170
NET SONDE
CSH-5508 (800 mm stroke)
CSH-5512 (1200 mm stroke)
vi
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CONTROL DESCRIPTION
Control Layout on Display Unit and Remote
Control Box
POWER
TRANSDUCER
OFF
ON
SUB PANEL 1
MAIN PANEL
F1
F2
F3
-
+
NORM
E/S
HIST
RECALL
MEMO
-
+
-
+
RANGE
GAIN
AUTO
TILT
NARROW
SHOOT
BOOST
R/B
WIDTH
TILT
SCAN DEPTH
NET
COURSE
TARGET
LOCK
DIM
CONT
BRILL AUDIO
EVENT1
EVENT2
ESTI-
MATE1
ESTI-
MATE2
OFF-
CENT
FISH
PUSH-OPEN
SUB PANEL 2
Each press displays water
temperature or depth at screen
center for about five seconds.
DISP SELECT
2
DATA
Selects which display unit to
control in multiple display unit
installation.
Raises/lowers the transducer.
: Raises transducer.
: Mid protrusion
1
3
TX
Turns on transmitter.
EVENT
TGT LOCK
: Full protrusion
ESTIMATE
1
NET COURSE
Shifts trackball mark.
Press to enter mark
shown on key or shift
screen center.
FISH
OFF-
CENT
FUNCTION
Replays user preset settings.
Lit lamp shows current selection.
1
2
3
4
5
Displays net shooting mark.
Saves picture to memory card.
Sharpens width of Tx beam.
SHOOT
MEMO
+
+
Selects display range.
–
GAIN
NARROW
RECALL
Replays a stored picture.
–
Automatically tillts sounding
beam in 2° steps within tilt
angle selected by WIDTH key.
RANGE
Adjusts receiver sensivity.
AUTO
AUTO
Varies the tilt angle of the
sounding beam between -5°
and 60°.
Not used.
BOOST
TILT
TRAIN
SCAN DEPTH
Changes weight in vertical
direction at Tx.
Figure 1-1 Display unit and
remote control box
1-1
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Main Panel
POWER
TRANSDUCER
OFF
ON
F1
F2
F3
-
+
NORM
E/S
HIST
RECALL
MEMO
-
+
-
+
RANGE
GAIN
AUTO
NARROW
SHOOT
BOOST
R/B
TILT
WIDTH
TILT
SCAN DEPTH
NET
COURSE
TARGET
LOCK
DIM
CONT
BRILL AUDIO
EVENT1
EVENT2
ESTI-
MATE1
ESTI-
MATE2
OFF-
CENT
FISH
Figure 1-2 Main panel
Main panel control description
Control
Function
POWER ON,
POWER OFF
ON: Turns on the system. The lamp above the key lights during Tx
and blinks when the TX key in sub panel 1 is turned off.
OFF: Turns off the system. Press after retracting the transducer.
TRANSDUCER
Raise and lower the transducer. The small down arrow key provides
mid-protrusion; the large down arrow key, full protrusion. The UP
arrow raises the transducer.
F1-F3, [-], [+]
Sets up display according to user program. [-], [+] provide fine tuning.
1-2
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Control
Function
NORM, E/S, HIST
(Mode keys)
Select display mode: NORM, normal sonar picture; E/S, Echosounder
combination; HIST, Historical display.
Lamp above a key lights to show current selection.
RECALL, MEMO
RECALL: Replays saved picture.
MEMO: Saves picture to memory card or internal memory.
RANGE
GAIN
Selects a picture display range. Range selected appears on the display.
Adjusts receiver sensitivity.
NARROW
Sharpens width of Tx beam when turned on (light above key is on).
The off position provides normal Tx beamwidth.
BOOST
SHOOT
Changes weight of vertical direction during transmission when turned
on.
Press when net is cast. The net shooting mark, *net sonde marks and
*current mark appears at the own ship mark. The net shooting mark,
net sonde marks and current mark moves on the *ship's track as the
ship moves. The lamp above the switch lights and time *distance run
appear on the display unitl the net shooting mark is turned off.
(* Requires external sensor.)
R/B
Provides range and bearing data from own ship to a target. Select
target with trackball and then press the R/B key. A line connects
between own ship mark and trackball mark to measure bearing.
TILT
Changes the tilt angle of the sounding beam between -5°and 60°.
AUTO TILT
Automatically tilts the sounding beam up and down in 2° steps within
the tilt angle selected by the WIDTH key. The lamp above the key
lights when automatic tilt is on.
WIDTH
Sets tilt width in automatic tilt.
Marks location of net.
NET COURSE
TARGET LOCK
EVENT 1, 2
Tracks a fish school.
Inscribes event mark on the display, to find horizontal, range, depth
and bearing of a target.
ESTIMATE 1, 2
FISH
Compares volume of two fish schools.
Measures fish school speed.
Relocates selected target.
OFF-CENT
DIM
Adjusts the backlighting of the control panels and the brightness of
the lamps above keys
CONT
BRILL
AUDIO
Adjusts screen contrast.
Adjusts screen brilliance.
Adjusts volume of built-in loudspeaker, which monitors a target
appearing along the bearing marker.
TRACKBALL
Follows on-screen movement of trackball mark, to enter marks and
off-center the screen.
1-3
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Sub Panel 1
POWER
TRANSDUCER
ON
OFF
MENU
END
HELP
NET
REPLAY
CARD
REPLAY
COLOR
TX
F1
F2
F3
F5
F4
NORM
E/S
HIST
MEMO
RECALL
Figure 1-3 Sub panel 1
Sub panel 1 control description
Control
MENU
Function
Opens/closes the menu.
END
• When the menu is displayed it terminates menu operation and
returns control to the sonar picture.
• When in a sub menu it returns to previous sub menu.
HELP
Provides operating information for current menu.
Select items on menus.
cd[ \
CARD REPLAY
COLOR
Replays card-stored control and menu settings.
Changes display color among four choices.
NET REPLAY
Replays internally stored net shooting data. To replay, press key to
light lamp above it, select item to replay, and press the key again.
TX
Press to transmit, when transducer is lowered. Lamp lights during
transmission.
1-4
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Sub Panel 2 (data setting window)
This example shows settings
of TVG and TX.
ITEM
(TVG•TX selected)
TVG•TX
CURRENT SETTINGS for item selected (TVG•TX)
SIGNAL
ES
TVG
TX
PL
DELETE MK
SONR•BEAM
AUTO
NEAR
MEDIUM
FAR
CYCLE
OUTPUT
7 8 9 7 8 9
ALM•AUDIO
g
+
–
+
–
+
–
+
–
+
–
+
–
OPER
P-SET
h
(TOGGLE)
Item selection keys
Select item.
Setting change keys
Change control setting.
OPER P-SET key
Opens/closes data setting window.
Figure 1-4 Sub panel 2
Sub panel 2 control description
Item
Main
Item
Setting
Range
Normal
Setting
Description
Main
Sub
Adjusts receiver gain within
100 m.
NEAR
MEDIUM
FAR
0–9
0–9
0–9
5
5
5
Adjusts receiver gain between
100 m and 400 m.
TVG
Adjusts receiver gain beyond
400 m.
TVG•TX
Sets Tx cycle. 9 is normal
setting (fastest). "0" synchro-
nizes with external KP.
CYCLE
0–9
9
TRANS-
MIT
Sets Tx pulselength. 9 is normal
setting.
PL
0–9
0–9
9
9
Sets Tx output power. 9 is
maximum power.
OUTPUT
(Continued on next page)
1-5
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Item
Main
Item
Setting
Range
Normal
Setting
Description
Main
Sub
NL
0–10 Rejects unwanted echoes.
Automatically reduces receiver
3
gain against strong echoes such
as seabed. Adjust so fish echo is
AGC
0–10
0
SIGNAL
PROCESS
displayed near seabed.
Suppresses seabed echoes. If
AGC alone cannot suppress
seabed echoes, use 2AGC.
2AGC*
CURVE
IR
0–4
1–4
0–3
0–4
16
0
2
0
0
Selects echo level versus presen-
tation color curve. The higher
the setting, the easier it is to see
weak echoes on the screen.
SIGNAL
Rejects random noise and inter-
ference by other echo sounders
or sonars.
SIGNAL
PROCESS
Adjusts echo afterglow, which is
useful for watching echo move-
ment. The higher the setting the
longer the afterglow remains.
AFGLOW
Sets depth range of echo
sounder picture. Sets range of
Pos. net recorder downward
sounding.
RANGE
(DN RNG)
160 m
ES1
(Net
Recorder)
GAIN
0–10 Adjusts receive sensitivity.
5
Sets display start depth of echo
0–
SHIFT
sounder picture. Sets range of
0 m
(UP RNG) 1000 m
ES
net recorder upward sounding.
Rejects blue dots (caused by
dirty water) on entire screen.
NL
0–10
0–9
0
0
ES1
(Net
Recorder)
Eliminates echoes displayed in
colors specified.
COLOR
IR
ON, Eliminates interference by other
OFF sonars or echo sounders.
OFF
Each pressing erases oldest mark
among event mark 1, event mark
2, fish mark, own ship mark.
DELETE
MARK
+ or -
DELETE MK
key to
erase.
DELETE
MARK
Each pressing deletes 1/5 of
overall length.
TRACK
*2AGC and HOR functions cannot be used together. If one is used the other is
automatically set to “0”.
(Continued on next page)
1-6
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Item
Main
Item
Setting
Range
Normal
Setting
Description
Main
Sub
Choose "1" for single sonar, or
"2" for dual sonar.
SONAR
F-SHIFT
1–2
1–2
1
1
Shifts Tx frequency. Choose "1"
for normal use.
SONAR
Selects presentation mode
among North-up (Nup), Heading
up (Hup), True Motion (TM).
UP/TM
HOR*
Hup
0
SONR•BEAM
Sets horizontal beamwidth of Rx
beam. The higher the number,
the narrower the beam.
0–10
1–10
BEAM
Suppresses sea surface
reflections by reducing vertical
Rx beamwidth.
NAR-
ROW
2
Turns on/off scanning tilt angle
in 2° steps.
ON/OFF ON,OFF
WIDTH
OFF
2°–12°
OFF
AUTO
TILT
Chooses automatic tilt width.
2°–12° is the normal setting.
AUTO
Turns on/off scanning EBL,
which scans audio sector.
ON/OFF ON, OFF
AUTO
SCAN
Chooses automatic scanning
width among ±10°, ±20°, ±40°
and ±60°.
WIDTH
±10°
ON/OFF ON, OFF Turns fish alarm on/off.
OFF
Sets echo level at which fish
alarm sounds. Numbers 0–15
correspond to 16 presentation
colors: 0, deep blue, 15, reddish
brown.
FISH
ALARM
LEVEL
0–15
10
Press +
key.
Sets alarm zone, using the
trackball and + key.
ZONE
ALM•AUDIO
Chooses audio sector among
30°, 60°, 90°, 180° and 330°.
SECTOR
30°
Chooses length of reverberation
for audio. Larger number gives
longer reverberation.
AUDIO
REVERB
CENTER
0–9
0
Sets direction of audio sector,
using the trackball and + key.
*HOR and 2AGC functions cannot be used together. If one is used the other is
automatically set to “0”.
1-7
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Remote Control Box
Each press displays water
temperature or depth at screen
center for about five seconds.
DISP SELECT
2
DATA
TX
Selects which display unit to
control in multiple display unit
installation.
1
3
Turns on transmitter.
Raises/lowers the transducer.
c: Raises transducer.
d
c
d
EVENT
TGT LOCK
d: Mid protrusion
d: Full protrusion
ESTIMATE
NET COURSE
Shifts trackball mark.
1
Press to enter mark
shown on key or shift
screen center.
FISH
OFF-
CENT
FUNCTION
Replays user preset settings.
Lit lamp shows current selection.
1
5
2
3
4
Displays net shooting mark.
Saves picture to memory card.
Sharpens width of Tx beam.
SHOOT
MEMO
+
+
Selects display range.
–
GAIN
NARROW
RECALL
Replays a stored picture.
–
Automatically tillts sounding
beam in 2° steps within tilt
angle selected by WIDTH key.
RANGE
Adjusts receiver sensivity.
AUTO
AUTO
Varies the tilt angle of the
sounding beam between -5°
and 60°.
Not used.
BOOST
TILT
TRAIN
SCANDEPTH
Changes weight in vertical
direction at Tx.
Figure 1-5 Remote control box
1-8
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OPERATIONAL OVERVIEW
Turning the Power On/Off
Turning the power on
Press the ON switch on the main panel. The lamp above the key
should light. If it doesn’t press the TX switch on sub panel 1.
Turning the power off
Retract the transducer with the cswitch and then press the OFF
key on the main panel.
Note: The transducer is automatically retracted into the tank even
if the OFF switch is pressed before retracting the transducer.
However, make it a habit to retract the transducer before turning
off the power.
Adjusting Screen Brilliance, Control Panel Backlighting
The BRILL control adjusts screen brilliance, and the DIM con-
trol adjusts control panel backlighting. These controls are on the
lower part of the main panel.
Lowering the Transducer
Press dor d switch. The lamp above the
key blinks during lowering of the transducer
and lights when the transducer is completely
lowered. In normal use fully lower the trans-
ducer. The transducer extends 1200 mm
below the ship’s hull, providing stable and
CAUTION
Do not exceed speed noted in the speci-
fications when operating the equipment
or lowering or raising the transducer.
cavitation-free soundings. If the transducer
may become entangled in the net, after
shooting the net, for example, partially raise
The transducer may become damaged.
the transducer with the dswitch. This raises
the transducer by 400 mm (transducer ex-
tends 800 mm from ship’s hull).
Do not press the cswitch during
lowering of the transducer, and do not
press the d or dswitch during raising
of the transducer.
The equipment may become damaged.
2-1
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Selecting a Display Mode
The CSH-53 provides three display modes: normal sonar pic-
ture, echo sounder combination, and history display combina-
tion. Those modes may be selected with the NORM, E/S and
HIST keys.
Table 2-1 Display mode description
Mode
Description
The sonar picture appears over the entire screen.
This mode is useful for detecting and tracking fish
schools.
The default display area is 1.3 times
the range, but it can be changed to
1.6 times the range on "EXT KP/TM
DSP" in the SYSTEM menu.
Navigation information can be
displayed in the text window at
the screen bottom by turning on
"DATA DISPLAY" in the user
menu.
Text window
NORMAL
Normal scanning picture appears on the upper 5/8
of the screen and the signal fed from the echo
sounder on the lower 3/8. This mode is suitable for
judging fish school concentration.
When two echo sounders are connected, each
pressing of the E/S key alternately selects echo
sounder 1 or echo sounder 2.
Note that a net recorder can be connected as echo
sounder 2; select it on the "ES" sub menu in the
INIT SET/TEST menu.
E/S
Normal scanning sonar picture appears on the upper
5/8 of the screen and the history display on the
lower 3/8. Three types of history displays are
available: Audio, Port/Starboard and Horizontal
Slice. You can select which one to display on the
USER menu.
HISTORY
2-2
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Selecting a Display Range
Operate the RANGE control to select a display range. The range
selected appears at the top center of the screen.
Setting the Tilt Angle
The tilt angle shows the direction to which the sound wave is
emitted. When the sound wave is emitted horizontally, the tilt
angle is said to be zero degrees and when emitted vertically, 90
degrees.
To set a tilt angle, operate the TILT lever.
Watch the tilt angle indication at the top right
corner on the screen. The tilt angle can be set
R400
Tilt
T 15
angle
in one-degree steps from -5° (upward) to 60°
(downward).
Finding a proper tilt angle is important when searching for fish.
Below are tips for selecting tilt angle.
Seabed echo and tilt angle
Case 1: Tilt angle 30 to 40 degrees
This tilt angle will display the entire seabed since it is captured
by the full width of the beam.
Case 2: Tilt angle 10 to 20 degrees
This tilt angle will only display half the seabed since it is only
captured by the lower half of the beam.
Case 3: Tilt angle 0 to 10 degrees
This tilt angle may or may not capture the seabed since the re-
turning echo is weak.
2-3
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How to discriminate fish echoes from the seabed
The figure below illustrates how two fish schools aand b are
displayed on the screen using three different tilt angles.
Case 1: Tilt angle 30 to 40 degrees. Fish school is obscured by
the seabed.
Case 2: Tilt angle 10 to 20 degrees. Fish school is located above
the seabed (midwater).
Case 3: Tilt angle 0 to 10 degrees. Fish school is located close to
the seabed.
Case 1
Case 3
Case 2
Fish school a
Fish school a
Fish school a
Seabed
Fish
school b
Seabed
Seabed
Case 1
Case 2
Case 3
Figure 2-1 Fish echo and tilt angle
Points to consider
• Normally, a vertically distributed fish school is a better sonar
target than the seabed, because it reflects the transmitted pulse
back toward the transducer.
• In case 3, both fish schools aand b are presented. Gener-
ally speaking, however, midwater fish schools tend to be larger
than bottom fish schools and they are often displayed near the
seabed on the display.
• It is difficult to detect bottom fish when they are not distrib-
uted vertically.
2-4
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Tilt angle for surface fish
Sound emitted from the sonar transducer forms a circle-shaped
beam with a width of approximately 16 degrees in the vertical
direction (vertical beam width). The tilt angle is indicated by the
angle between the center line of the beam and the horizontal
plane. Then, if the tilt angle is set to 0 degrees, the center line is
parallel with the sea surface and one half of the emitted sound
goes upward, toward the sea surface.
This causes one half of the emitted sound to be reflected toward
the transducer and displayed on the screen as sea surface reflec-
tions. When the sea is calm, since the sound is reflected just like
a light hitting a mirror at a narrow incident angle, it propagates
away and the sea surface reflections become negligible.
However if the sea is not calm enough, they will become domi-
nant and interfere with observation of wanted echoes. To mini-
mize these sea surface reflections and to search surface fish
schools effectively, the tilt angle is usually set between 5 and 6
degrees so the upper portion of the beam becomes almost paral-
lel with the sea surface. When the sea is rough, it is often set to a
little larger angle.
Surface
Tilt angle 0°
15°
Surface
Tilt angle 5-6°
15°
Figure 2-2 Tilt angle and sea surface reflections
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Suitable tilt angle
The figure below illustrates the relationship among tilt angle,
depth and detection range. Refer to it to find out the suitable tilt
angle for a given depth/detection range.
Tilt angle and beam coverage
Range (m)
400
(800)
100
(200)
200
(400)
300
(600)
0°
5°
20(40)
40(80)
60(120)
10°
80(160)
100(200)
15°
200(400)
300 m
Vertical width of sonar beam
200 m
100 m
78 m
15°
26 m
52 m
Figure 2-3 Tilt angle and beam coverage
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Adjusting the Gain
The GAIN control adjusts receiver sensitivity (gain). Adjust it
so fish echoes are clearly displayed with minimal noise on the
screen. Too high a setting not only displays excess noise and
makes it difficult to discriminate wanted echoes but also causes
seabed echoes to be painted in strong colors, resulting in echoes
being masked by seabed reflections. Normally, set the control
somewhere between positions “3” and “7”.
Gain low
Gain high
Gain proper
Figure 2-4 Gain settings and resulting picture
Measuring 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 range and bear-
ing appear at the upper left corner on the screen.
ª
ª
ª
B
Figure 2-5 Location of range and bearing indications
Note: The bearing is shown in either 360° or 180° indication
relative to ship’s heading. In the latter case, bearing (“B”) is
indicated as follows:
B
B
P ------- on the port side
S ------- on the starboard side
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FINE TUNING THE PICTURE
Eliminating Unwanted Feeble Echoes
Echoes from targets such as seabed and fish return to the trans-
ducer in order of distance to them, and when we compare their
intensities at the transducer face, those from nearer targets are
generally stronger when their reflecting properties are nearly
equal. The sonar operator will be quite inconvenienced if these
echoes are directly displayed on the screen, since he can not
judge the actual size of the target from the size of echoes dis-
played 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 range is sup-
pressed and gradually increased as range increases so that simi-
lar targets are displayed in the similar intensities irrespective of
the ranges to them.
The CSH-53 has three TVG functions, NEAR, MEDIUM and
FAR, and they mainly compensate for propagation loss on short,
middle and long ranges respectively, centered at the ranges shown
below. The higher the TVG setting the greater the amplification
of echoes.
Figure 3-1 Principle of TVG
The TVG is also used to suppress unwanted echoes and noise
which appear in a certain range area on the screen such as sea
surface reflections and cruising noise. To set TVG properly, do
the following:
How to adjust TVG
1. Open sub panel 2.
2. Select TVG•TX.
3. Set TVG NEAR, MEDIUM and FAR to 5.
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4. When sea surface reflections or plankton layers disturb the
picture, decrease appropriate TVG option by one or two steps
by pressing – (minus) key.
5. Locate fish school on a long range setting (about 800 meters)
which is approaching own ship.
6. Adjust the tilt to keep the fish school in the center of the
sonar beam, namely, fish school is displayed in strongest
colors possible. Confirm that the fish echo is displayed in
the same color as it approaches. If the color suddenly changes
to weaker colors as the fish enters MEDIUM and NEAR
areas, the TVG is improperly set. Adjust the TVG. If this
again produces sea surface reflections and noise try to re-
move them with AGC and NL controls.
Note: If the above procedure does not produce satisfactory re-
sults, the TVG curve can be changed on the SYSTEM menu.
The 15 log setting is useful for searching fish schools near shore-
lines or shallow waters. The 30 log setting raises the gain on a
long range and is suitable for tuna and bonito, which are usually
searched with high gain setting.
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Suppressing Seabed Tail
AGC (data setting window: SIGNAL, SIGNAL
PROCESS)
The AGC functions to automatically reduce the receiver gain
only against strong echoes such as the seabed or a large fish
school. Since weak echoes remain unaffected, a small fish school
becomes easier to detect. Adjust it so that the AGC works only
on seabed reflections. Do not set it too high; weak echoes may
be missed.
Pulselength (data setting window: TVG • TX, PL)
The pulselength control determines the length of the transmis-
sion pulse emitted into the water. While a longer pulse is advan-
tageous for long range sounding, it has the disadvantage of being
poor in discrimination of targets, that is, ability to separate sev-
eral closely located targets. When searching bottom fish, there-
fore, it is useful to shorten the pulselength in order to separate
fish echoes from seabed reflections. Decrease the
PULSELENGTH setting to shorten the pulselength. For search
of surface and midwater fish in which seabed reflections are not
so strong, use the longest pulselength “10”.
2AGC (data setting window: SIGNAL, SIGNAL
PROCESS)
While it is ideal to suppress seabed echoes with the AGC con-
trol alone there are some fishing grounds where this is not pos-
sible. (The high power sonar has the advantage of long-range
detection but this can also be a disadvantage, since weaker ech-
oes may be hidden in strong, unwanted echoes such as the sea-
bed.)
If you cannot suppress seabed echoes or sea surface reflections
by the AGC control alone, use the 2AGC control. Normally a
setting of 2 or 3 is suitable. For especially strong echoes, use a
setting of 4 or 5.
AR, -4 to 1: Adjusts horizontal beamwidth
2AGC function is fixed at “3”.
0:
1 to 5:
2AGC function is off.
Larger the number, the greater the effect of
2AGC.
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Suppressing Seabed and Sea Surface Reflections in
Shallow Waters
Data setting window: TVG•TX, OUTPUT
In shallow fishing grounds with hard or rocky bottom, seabed
reflections often interfere with wanted fish echoes and they can
not be eliminated sufficiently with the aforementioned TVG and
AGC controls, especially when the TILT is set to a larger angle
in order to track fish schools approaching within 400 m. In such
cases try to reduce the output power by adjusting the OUTPUT
control instead of turning down the gain. The picture becomes
clearer when output power is reduced rather than when the GAIN
is decreased as illustrated below.
WRONG
Fish echo
METHOD
Fish echo
TVG and AGC
weakened
adjusted with
OUTPUT kept high
CORRECT
METHOD
Fish echo
OUTPUT decreased
with GAIN kept
constant
Figure 3-2 How to suppress seabed and sea surface
reflections in shallow waters
Rejecting Sonar Interference and Noise
While observing the sonar picture, you may encounter occa-
sional 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.
Identifying noise source
To eliminate noise effectively, you should first identify the noise
source as follows:
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1. Turn off the TX switch and operate all on-board equipment
one by one while observing the picture.
2. Run the boat at various speeds to check if the noise is speed
dependent.
If neither of the above two steps has effect on the picture, adjust
one of the following:
Interference rejector (data setting window: SIGNAL,
SIGNAL PROCESS)
This control is similar to the interference rejector on echo sound-
ers and radars. It is effective for rejecting random noise and sea
surface reflections in rough sea conditions. Set it so that noise is
just eliminated. Do not use an unnecessarily high setting since it
may also reject small wanted echoes.
Changing Tx cycle (data setting window: TVG•TX,
CYCLE)
When other sonars operate nearby at the same transmission in-
terval as that of own ship’s sonar, an interference ring caused by
other sonars is displayed. To erase the interference ring from
the screen, reduce the CYCLE on the data setting window.
Interference
Tx cycle high
Tx cycle lowered
Figure 3-3 How CYCLE works
Note: When the sonar is used in shallow water with the range
set between 60 m and 200 m and Tx cycle at “9”, seabed reflec-
tions caused by the 2nd-to-the-last transmission may appear on
near ranges. Reduce the Tx cycle setting to “2” or “3” to sup-
press them.
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Setting F-shift (data setting window: SONR•BEAM,
SONAR)
If interference cannot be suppressed by the interference rejector
(IR) or Tx cycle, change the setting of F-SHFT from 1 to 2.
Noise limiter (data setting window: SIGNAL, SIGNAL
PROCESS)
Weak, unwanted reflections, colored light-blue or green, appear
when the water is dirty, plankton layers exists, or due to ship’s
noise. The noise limiter (NL) can reduce the effects of these
unwanted reflections–raising the setting causes them to become
bluish to background color. Normally a setting of 3 or 4 is suffi-
cient.
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MARKS AND DATA
Marks, Data and Display Mode
Normal display mode
Figure 4-1 Marks and data appearing in the normal display
mode
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Normal display mode w/text
*Requires external sensor.
Figure 4-2 Marks and data appearing in the normal display
mode w/text
Echo sounder combination
display
*Requires external sensor.
Figure 4-3 Marks and data appearing in the echo sounder
display mode
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History display
*Requires external sensor.
Figure 4-4 Marks and data appearing in the history display
mode
Permanently Displayed Marks and Data
Mark/Data
Description
Trackball Data
Trackball data:
: Slant range
→ : Horizontal range
↓ : Depth
B : Bearing
→
↓
B
°
Bearing is shown in 360° or ±180° indication system, relative to ship’s
heading. In the latter case, "B" is indicated as follows:
.... on the port side
.... on the starboard side
B
B
P
S
Range Data
Shows the range scale set with the RANGE control.
R
The tilt angle appears below the range. The tilt angle can be changed
in 1° steps within the range of -5° to 60°. 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 angel at which the sonar actually
works.
Tilt Angle Data
T
°
(
)
(Continued on next page)
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Mark/Data
Description
Own Ship’s Mark
Shows own ship’s present position. The direction of the arrow shows
ship’s heading. This mark moves with ship’s movement in the * true
motion mode. On all other modes it is fixed at the screen center.
When the CSH-53 is connected to a gyrocompass the mark is called
the north mark and points North. If there is no gyrocompass input
the heading mark points the direction of own ship’s heading.
* North Mark
(or Heading Mark)
Heading Data
This data requires gyrocompass input. Bearing is displayed in
32-azimuth (N, N/E, etc.). Bearing can also be displayed in figures
(for example, "360") by calling up the SYSTEM menu and selecting
BRG READOUT-Course.
Trackball Mark
Sets own ship’s mark location for off-center display; sets location for
mark input. The trackball (or arrow keys on the remote control box)
controls this mark.
Erasable Marks and Data
Mark/Data
Description
Latest Event
Mark
These marks depict important locations. With speed log and gyro-
compass connection these marks follow ship’s movement. In the *true
motion mode they are stationary. Ten marks, one latest and nine event
marks, can be displayed. When more than ten marks are entered the
oldest is erased to make room for the latest.
Event Mark
1
1
Latest Event Mark
Data
The position data of the latest event mark, that is, horizontal range
(→), current depth ( ) and bearing. (
) shows the latest event
↓
mark’s original depth, and remains unchanged regardless of ship’s
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 the event mark
and press the EVENT key.
(
)
°
B
(Continued on next page)
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Mark/Data
Description
Latest Fish Mark
These marks are inscribed on the screen by pressing the FISH key.
Ten fish marks can be displayed. Each time the key is pressed the fish
marks change on the screen as follows:
Fish Speed 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 from the fish speed mark ( ) to the latest fish
marker ( ) is shown by distance, course (C) and speed (S) at the lower
right corner of the screen.
Fish Movement
→
→
C
S
.
These marks are used for monitoring echoes through the loudspeaker
and also for displaying horizontal slice picture. If the *target lock
function is on the bearing marks follows the movement of the target
lock mark.
Bearing and Range
Marks
Bearing
marker
Range
marker
Range and Bearing
Mark Data
This data appears when the bearing and range marks are displayed.
°
B
R
Heading Mark
The heading mark is drawn with a dotted line. *Heading mark data
appears at the top of the screen.
Range Rings
The range rings are inscribed at intervals of 1/4 of the range in use.
Range ring data is also provided every two range rings. The range ring
interval can be changed from 1/4 to 1/2 through the menu.
100
200
The electronic bearing scale is available with gyrocompass connection.
It rotates with own ship’s movement.
Electronic Bearing
Scale
N
W
E
S
(Continued on next page)
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Mark
Description
With gyrocompass or speed log connection, own ship’s track is plotted
by a solid line. The track length can be selected among 5, 10, 20 and
40 times the range. When the length exceeds designated length the
track is erased so that its length is equal to the designated length.
*Ship’s Track Mark
3
This mark can be displayed with current indicator input. The current
marks are displayed on the net shooting mark ( ) and net sonde
*Tidal
Current
Mark
2
1
marks (
). The current markers shows tidal current sped in
three layers (1—3) selected on the current indicator. The tidal current
speed is shown by the length of the current mark. Note however that
no current mark appears if the tidal current speed is less than 0.2 kts.
Current direction can be shown as "to" or "from" by selecting
CURRENT VEC-Current Flow Dir on the USER menu. In the normal
mode with text, speed, direction and depth of the current are shown
for three layers (C1, C2, C3). In the echo sounder and history modes,
only the speed appears (C1, C2, C3), on the echo sounder or history
display.
Tidal Current Data
Normal Mode
C1 :
C2 :
C3 :
.
.
.
M
M
M
Combination Mode
C1 :
C2 :
C3 :
.
.
.
*Net Sonde Data
S1 :
S2 :
S3 :
When the net sonde is connected, the depth of the net sonde trans-
mitters appears in the text window, echo sounder, or audio area.
With appropriate sensors speed (S), course (C), water depth (D) and
water temperature (T) can be displayed on the text window, echo
sounder combination display, or history display.
Nav Data
S :
C :
D :
T :
.
.
With navigation input position can be displayed in latitude and long-
itude, in the normal mode only.
Own Ship Data
°
°
.
.
N
E
Estimate Mark
The estimate mark gives relative fish quantity. Press the ESTIMATE
key. The estimate mark data appears below the mark. The fish amount
is assessed as between 0 and 100, where if the mark is filled with the
strongest echo color reddish brown, the amount is regarded as "100."
The size of the estimate mark can be changed with MARK SIZE2-
Estimate Mark on the SYSTEM menu.
Estimate mark
data
(Continued on next page)
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Mark
Description
Target Lock Mark
The target lock mark automatically tracks the fish school selected
by the operator. This function requires speed and gyrocompass inputs.
Net Shooting Mark
Press the SHOOT key at the instant you shoot the net to display the
net shooting mark on the display. The net shooting mark is drawn
at own ship’s position the moment the key is pressed and moves on the
own ship’s track mark with ship’s movement. In addition to the
mark, time elapsed and * distance run (in meters) appears from the
time the key is pressed. The mark and its data remain on the screen
until the SHOOT key is pressed again.
Net Shooting Data
:
Net Sonde Mark
These marks appear on the *ship’s track mark in order at set intervals,
when a net sonde is connected. In the echo sounder combination
mode they also appear in the echo sounder picture, showing depth of
the net sonde transmitters with bars extending from the marks.
(10 pts. max)
E/S Picture Advance Picture advance on the echo sounder combination mode automatically
Range Data
changes to ship’s speed dependent (advance) rate from the moment
the SHOOT key is pressed, provided there is speed log input. The
E/S picture advance range data shows the distance between the right
and left edges of the echo sounder picture window in the ship’s speed
dependent advance. Since the net length plus wire length set on the
DATA SET menu is used as this distance data, the echograms
obtained during casting the net are displayed just across the E/S
window. Set net length and wire length on NET SONDE in the DATA
SET menu.
z , / /
Control Setting
When the switches listed below are operated the new setting is noted
at the top of the screen in larger characters for five seconds. The auto
tilt width and auto scan width also appear upon turning on the AUTO
TILT and AUTO SCAN functions.
Control, Display
Control, Display
±
RANGE R
AUTO TILT
°
TILT
T
AUTO SCAN ±
.
.
.
GAIN
G
BRILL
DIM
TVG TVG
TX
TX
The 16-color bar appears at the right-hand edge in the echo sounder
and history displays.
Color Bar
The range scale for the echo sounder picture appears in the echo
sounder combination mode. You can display it on the right or left
side of the screen by selecting ES/NET REC on the INIT SET/TEST
menu.
E/S Range Scale
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MENU OVERVIEW
Many functions are carried out through the menu system, which
consists of the USER, SYSTEM, DATASET and INITIALSET/
DATA menus. The menu you will use most often is the USER
menu.
Menu
USER
How to open
Press MENU.
SYSTEM
Press c + MENU.
Press d + MENU
DATA SET
Press MENU + ON.
(Press and hold down until the buzzer
sounds. All LEDs light while keys are
held down.)
INIT SET/TEST
USER Menu Operation
The menu operating procedure is the same for all types of menus.
Below is the basic menu operating procedure for the USER menu.
1. Press the MENU key to open the USER menu.
USER MENU
Select item with dc[ \keys and press MENU key.
Press END key to close menu.
CARD UTILITY
DATA DISPLAY
CURRENT VEC
CARD ECHO DAT
MARK DSP 1
CARD NET DATA
MARK DSP 2
FUNCTION KEY
HIST DSP/GRPH
SAVE PICTURE
Figure 5-1 USER menu
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2. Operate the arrow keys in sub panel 1 to select a menu. As
you move through the menu, each item, initially shown as
blue on gray, universes to gray on blue to show selection.
For example, select the HIST DSP/GRPH menu.
3. Press the MENU key to display menu selected.
USER MENU
HIST DSP/GRPH
Select item with dc[ \keys and press MENU key.
Press END key to close menu.
HIST Window DSP
Fish Histogram
AUDIO
ON
PRT/STBD
OFF
H-Slice
Figure 5-2 HIST DSP/GRPH menu
4. Operate the up and down arrow keys in sub panel 1 to select
menu item, and the right and left arrow keys to select op-
tion.
5. Press the END key to close the menu. Press the key again to
display picture.
Note: The HELP key provides menu operating information.
Menu screen location and display mode
Menu screen location depends on display mode as shown in the
figure below.
Menu
Menu
ES Mode
Normal Mode
Figure 5-3 Menu screen location and display mode
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USER Menu Description
Table 5-1 User menu description
Menu
Menu Item
List
Description
Lists contents of memory card.
Saves control and menu settings to memory card.
Deletes data from memory card.
Formats memory card.
Save
CARD
UTILITY
Delete
Initialize
Save
CARD ECHO
DAT
Saves echo inside estimate mark (stored in internal
memory by MEMO key) to memory card.
CARD NET
DATA
Save
Saves net shooting data (stored in internal memory)
to memory card.
Register
Saves customized settings of range, gain, display
mode, TX ON/OFF, user menu, system menu, and
data set menu to function key.
FUNCTION KEY
Event Mark 1
Event Mark 2
Fish Mark
On Track Data
Text Window
ES Window
Turns those marks on/off. "ES Window" selects
display current data or net sonde data, which are
displayed on the ES combination display while
shooting the net.
DATA DISPLAY
Range/Bearing
Heading Mark
Range Rings
Bearing Scale
Auto Scan Width
Auto Train Width
Turns those marks on/off. Note that turning off
Range/Bearing mark also turns off the data display.
MARK DSP 1
MARK DSP 2
Ship's Track
Net Movement
Plot
Fish MK Connect
Fish Tracking MK
Fish Track Plot
Turns those marks on/off.
HIST Window
Dsp
Chooses type of display for HIST window:
AUDIO:
Displays echoes within audio sector.
PRT/STBD: Displays echoes in specified port and
starboard directions.
HIST DISP/GRPH
H-Slice:
Displays echoes along upper half of
range mark.
Fish Histogram
Turns on/off echo intensity distribution for echoes
inside estimate mark on the Target Slice display.
(Continued on next page)
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Menu
Menu Item
Description
w/Current Vec Turns those marks on/off. Current Flow Dir
displays tidal current direction as "To" or "From".
w/Current Vec
CURRENT VEC
w/Current Vec
Current Flow Dir
Save Method
Selects how to save echoes.
Whole: Saves echoes and data on whole screen to
memory card. whole screen to memory
card.
SAVE PICTURE
Est MK: Saves echoes inside estimate mark to
internal memory.
QK Save: Saves echoes and data on whole screen
to internal memory.
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SYSTEM Menu Description
c
The SYSTEM menu can be displayed by pressing MENU +
.
Menu
SIGNAL
Item
Description
Smooth Echo Rng
Selects echo smoothing level in range
direction. The higher the number, the higher
the smoothing effect. The setting range is
from 0 to 3.
PROCESS
Smooth Echo Cir
Delete Color
Selects echo smoothing level in circular
direction. The higher the number, the higher
the smoothing effect. The setting range is 0 to
3.
You can delete undesired echoes and noise in
certain colors from the display. This is useful
for eliminating noise and detecting large fish
schools. The setting range is 0 to 10. If you
want to delete echoes displayed in colors
weaker than the 5th weakest color, for
example, set to 4.
FAR TVG
Far TVG Curve
Selects suitable FAR TVG curve to
compensate for propagation loss of sound at
100 m or farther. 30log is the normal setting.
25log: Suitable for searching small bottom
fish in shallow water or near coastline.
30log: Standard setting
35log and 40log setting also available.
TM DSP
TM Display Range
Selects a display range in the true motion
display, from 1.3R and 1.6R.
Note: To enable KP synchronization, open sub
panel 2, choose TVG/TX and TRANSMIT
and then set CYCLE to "0".
TARGET LOCK
Tracking Method
Track Echo Color
This option determines what item to track in
target lock; target lock mark or fish echo.
Select the weakest color to track in the target
lock function. The setting range is 1 to 15,
corresponding to the 16 display colors. 10 is
the recommended setting, where 10th to 16th
(reddish brown) color echoes are tracked.
Tracking Factor
Determine which fish to track, by relative
echo strength, when multiple fish schools
appear in the tracking window. 10 is the
normal setting.
Disable TGT Lock
Set the number of Tx cycles to search lost fish
school before quitting target lock.
(Continued on next page)
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Menu
Item
Description
TARGET LOCK
Fish Spd Update
Selects update interval of fish speed readout.
You can select from 5 seconds, 10 seconds,
20 seconds, or 30 seconds.
Target LK Window
Course
Selects size of target lock window (in pixels);
64 x 64 (normal), 96 x 96 (large), or 128 x
128 (largest).
BRG READOUT
Selects unit of readout for course and bearing
between fish marks; 32 compass bearing or
360° true bearing.
Current Data
Event Mark
Other Marks
Display current data readout in 32 compass
bearing, 360° true bearing, 180° relative
bearing, or 360° relative bearing.
Display event mark readout in 32 compass
bearing, 360° true bearing, 180° relative
bearing, or 360° relative bearing.
Display location of trackball mark and bearing
marker in 32 compass bearing, 360° true
bearing, 180° relative bearing, or 360° relative
bearing.
DATA DISPLAY
MARK SIZE 1
Control Setting
Keep OFF for normal operation. "Sonar" and
"TGT Lock" options are for factory use only.
Text Window Data
Choose (external sensor) data to display at
screen bottom. "1" provides all available data.
Other options provide less data in larger
characters.
Trackball Mark
Select size and shape of trackball mark; +
mark, or rectangle, available in large or small
size.
Target Lock Mark
Event Mark 1
Event Mark 2
Fish Mark
You can select the size of these marks for
large or small.
Own Ship Mark
MARK SIZE 2
Own Ship Mark
Net Shoot Mark
Estimate Mark
Select the size of these marks for large or
small.
Current Vector
Range Rings
Select the length of the current vector for long
or short.
Select interval (times range in use) of range
rings; 1/4R or 1/2R.
Ship's Track MK
Choose length (times range in use) of ship's
track.
(Continued on next page)
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Menu
Item
Description
ES/NET REC
ES 1 Color Curve
Select echo level versus presentation color
curve for echo sounder 1.
Linear: Weak echoes are not as conspicuous
as
in log setting. Useful for eliminating
weak echoes.
Log: Weak echoes are painted in "stronger"
colors. The higher the setting the easier
are weaker echoes to see on the display.
ES 2 Color Curve
Picture Advance
Same as above except for echo sounder 2.
Set picture advance speed for the echo
sounder display.
Advance at Shoot
Choose "Sonde" to have ship's speed
dependent advance of echo sounder picture
while shooting net and "KP" to have advance
synchronized with transmission.
Net Rec Picture
H-Slice Width
Select net recorder picture display mode;
up/down or down sounding.
HIST DISPLAY
Select width for sampling echoes along upper
half of range marker in horizontal slice
display. The higher the setting the wider the
sampling area.
PRT/STBD Sample
Set angle from ship's bow for sampling echoes
in PRT/STBD display.
INTERLOCK
DEFAULTS
Tilt, Range
Event Mark
Fish Mark
Net Shoot Mark
Target Lock
You can interlock these items with respective
items on sonar connected to the CSH-53. If
you interlock the range, for example, anytime
the range is changed on the CSH-53 it is
automatically changed on the sonar connected
and vice versa.
Defaults
Press MENU key to clear all user, data set
and system menus settings and restore default
settings on all system menus.
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DATA SET Menu Description
d
The DATA SET menu can be display by pressing MENU +
.
Menu
Item
Description
COLOR CURVE
Sonar 1
Sonar 2
Echo Sounder 1
Echo Sounder 2
For each of these devices you may change
settings of echo level versus presentation color
curve, which you selected at either "CURVE"
at SIGNAL PROCESS on data setting
window or system menu. Note that Sonar 2 is
not used.
l. First select item to change on COLOR
CURVE sub menu, and then press the
MENU key.
Display
color
Level
setting
15
255
193
13
11
8
104
C
o
l
o
r
58
B
a
r
4
18
0
0
Level
128
255
2. Color curve can be changed at colors no. 4,
8, 11, 13 and 15. Press up or down arrow
keys to set cursor on color no. you want to
change curve.
3. Press the right or left arrow keys to change
value.
4. Press the MENU key to terminate color
curve setting. Then, the display shown
below appears. Follow the instructions on
the screen.
Color curve setting is completed.
To save change and close the menu, press
MENU key.
To cancel change and close the menu, press
END key.
(Continued on next page)
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Menu
Item
Description
CHANGE COLOR Sonar 1
Sonar 2
You can customize the color of these items
according to user request, etc. Note that Sonar
2 is not used. For display color change on
Sonar 1 you can change color according to
selection by COLOR key.
Echo Sounder
Marks
Menu
1. First select item to change on CHANGE
COLOR sub menu, and then press the
MENU key.
Before
(R) (G) (B)
Before
(R) (G) (G)
Display
Color
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
2. Using the arrow keys, place the cursor on
color segment you want to change color. If
you are changing the color of marks or the
menu, press the HELP key to display
guidelines for changing their colors.
3. Press the up or down arrow keys to
change value, between 0 and 100. You can
press and hold down the keys to get faster
change.
4. Repeat steps 2 and 3 to change other
colors.
5. Press MENU key to terminate color setting.
Then, the display shown below appears.
Follow the instructions on the screen.
Color curve setting is completed.
To save change and close the menu, press
MENU key.
To cancel change and close the menu, press
END key.
(Continued on next page)
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Menu
Item
Description
NET SHOOT
PLAN
Net Diameter
Sets estimated ship's turn diameter necessary
for shooting net, to get accurate depiction of
net location mark, which you can display by
pressing the NET COURSE key. The setting
range is 200 to 1000 meters in 10 meter steps.
Tilt Interlock
Choose ON to interlock diameter of net
location mark with tilt angle. When you lower
the tilt angle the on-screen net location mark
enlarges. (For example, the net diameter is set
for R meters. When the tilt angle is 45° the
diameter of the on-screen net is 2 R meters.)
NET SONDE
Net Sonde XMTR
Net Length
Enter number of net sonde transmitters and
their distances between each other.
Enter net length. The setting range is 500 to
3000 meters in 100 meter steps.
Wire Length
Enter wire length between own ship and net.
The setting range is 100 to 1000 meters in 100
meter steps.
Net Width
Enter net width. The setting range is 0 to 100
meters.
NET PLOT CORR Layer 1
The movement of the net during net shooting
is plotted by using water current speed and
direction fed from external sensor. The
external sensor feeds that data for three depths
(layers), thus net movement will be different
at each layer. Determine degree of difference
among layers considering net, sea conditions,
vessel construction, etc. If 50% is set, for
example, on-screen net moves at speed of
50% of water current speed.
Layer 2
Layer 3
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INIT SET/TEST Menu Description
The INIT SET/TEST menu can be displayed by pressing MENU
+ ON.
Menu
Item
Description
HEADING ADJ
Heading Adjust
Set deviation angle of HEAD mark on hull
unit from ship's bow. If deviation is 15° to
port, enter "15" (degrees); 15° to starboard,
enter "345."
BAUD RATE
EXT KP
I/F CS-120A
Aux Port 1
Aux Port 2
Aux Port 3
P C Port
Set data transmission speed (baud) of ports.
Set to 2400 bps for I/F CS-120A.
Ext KP Polarity
KP Out Polarity
Choose positive or negative logic for keying
pulse fed from external sonar or echo sounder,
to synchronize transmission.
UNIT/LANGUAG- Depth
E
Choose unit of depth readout.
Dist for Shoot
Choose unit of distance run readout for
shooting net; meters, feet, fathoms, or passi.
Temperature
Language
Choose unit of water temperature readout;
centigrade or fahrenheit.
Choose language used in menu; English,
Japanese, or Korean.
SELF TEST
Single
Performs display unit self test once.
Continuous
Panel
Performs display unit self test continuously.
Checks the keys of the display unit and
remote control box for proper operation.
Color
Gray
SIO
Checks for proper display of colors.
Checks for screen distortion.
Conducts communication test between the
display unit and transceiver unit. Requires a
test plug.
(Continued on next page)
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Menu
Item
Display Test
Description
ECHO TEST
Checks the display unit without connection of
other units. A test pattern is displayed.
Demonstration
Reserved for future use.
E/S NET REC
E/S Audio Scale
Displays depth scale on right or left side of
echo sounder display.
ES Draft Adjust
ES 2 Select
Sets ship's draft to read true depth on echo
sounder display.
Selects equipment connected to ES 2 port;
echo sounder or net recorder.
Net Rec Range
Sets sounding range of net recorder
transmitter unit.
DEFAULTS
Defaults
Restores default settings.
Reserved for future use.
Program Recalls
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FUNCTION KEYS
Similar to the quick dialing function on a telephone, the five
function keys (F1–F3) on the main panel record control and menu
settings and replay them back exactly as programmed. The items
you can program are gain, display mode, TX ON/OFF, USER
menu, SYSTEM menu, DATASET menus and data setting win-
dow. The function keys are useful for quickly setting up the so-
nar for a specific purpose such as seabed detection.
Programming the Function Keys
1. Tune the sonar as desired.
2. Press the MENU key.
3. Select the FUNCTION KEYmenu and press the MENU key.
USER MENU
FUNCTION KEY
Register
Execute
Figure 6-1 FUNCTION KEY menu
4. Press the MENU key again.
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REGISTER
FUNCTION KEY
USER MENU
Customized settings are registered to FUNCTION keys.
Select key number with↑ ↓ key and press MENU key.
Press END key to return to sub menu.
1
Figure 6-2 REGISTER menu
5. Press the up or down arrow key in the sub panel 1 to select
the function key to program, then press the MENU key.
6. Press the END key several times to close the menu.
Replaying a Function Key
Press function key (F1–F3) desired.
Function Key Fine Tuning
The function key fine tuning keys ([+], [-]) let you fine tune the
items shown in the table on the next page when a function key is
active.
Note: Register function keys beforehand to use this function.
1. Press desired function key. The lamp above the function key
pressed lights.
2. Press the [-] or [+] key as appropriate; the [-] key to lower
the setting to de-emphasize echoes, and the [+] key to raise
the setting to emphasize echoes.
The lamp above the [-] key lights when the setting is -1 to -4,
and the lamp above the [+] key lights when the setting is 1-5.
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Fine
Function Key Fine Tuning
Adjustment
Item
-4
-3
-2
-1
0
1
2
3
4
5
TVG Near
TVG Mid
-3
-3
-3
0
-2
-2
-2
0
-1
-1
-1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
1
0
0
0
0
2
1
1
0
0
0
3
2
1
0
0
0
4
3
2
0
0
0
TVG Far
Tx Cycle
Tx Beamwidth
Tx Power
-3
-2
-2
-1
-1
0
Saving Function Key Settings to a Memory Card
1. Press the MENU key.
2. Select the CARD UTILITY menu.
CARD UTILITY
Press END key to return to main menu.
Execute
List
Save
Execute
Execute
Execute
Delete
Initialize
Figure 6-2 CARD UTILITY menu
3. Select Save and press the MENU key.
Note: If the card has not been initialized, initialize the card by
selecting Initialize and then save.
Replaying Function Key Settings from a Memory Card
Press the CARD REPLAY key on sub panel 1.
Note: When function key settings are replayed from a memory
card, current settings on all function keys are erased. Therefore,
if necessary, save current function key settings to another memory
card before replaying.
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ADVANCED LEVEL OPERATION
Finding Fish School Center
When you want to find the center depth of a fish school, use the
auto tilt function, which automatically scans the tilt angle within
the selected width.
Range (m)
75, 100
Width (1) Width (2) Width (3)
Period
10°
"
16°
"
20°
"
every 6 transmissions
150, 200
300, 400
500, 600
800
every 4 transmissions
"
"
"
every 2 transmissions
8°
6°
4°
2°
"
"
"
"
"
"
12°
8°
4°
16°
12°
6°
1000
more than 1200
For example, when the RANGE control, TILT lever and WIDTH
key are set to 800 m, 8° and width (1), respectively, the tilt angle
varies at every transmission as follows:
8°→8°→10°→10°→12°→12°→14°→14°→12°→12°→10°→10°→
8° →8°→ 6°→6°→4°→4°→2°→2°→4°→4°→6°→6°→8°→
8°
Figure 7-1 Tilt angle setting
How to find fish school center
1. On sub panel 1 or the remote control box, turn on the AUTO
TILT key. The lamp above the key lights on sub panel 1.
2. With the WIDTH key, select scanning width. Auto tilting
begins, with tilt angle set with TILT lever as a center tilt
angle. Successively changing tilt angle is displayed in pa-
rentheses at the upper right of the screen.
3. To change center tilt angle, operate the TILT lever.
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Tracking a Fish School (target lock)
Target lock, which requires speed and heading inputs, automati-
cally tracks an important fish school so that you wonít lose sight
of it on the display screen. Two types of target lock are avail-
able: Target Mark or Fish. One may be selected on the SYS-
TEM menu.
Tracking a fish school
1. Operate the trackball to place the trackball mark on fish school
you want to track.
2. Press the [TARGET LOCK] key to light the lamp above it.
.
The target lock mark (
tracking begins.
) appears on the fish school and
A
B
C
D
60° 60°
Depth
Figure 7-2 Target lock mark and target lock data
Note 1: Range offset is applied to both shipís movement and
fish school movement on the screen. Tilt angle is not offset.
Note 2: When the target goes out of the tilt angle range the
lamp above the [TARGET LOCK] key blinks, and then target
lock is cancelled.
3. To cancel target lock, press the [TARGET LOCK] key again.
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Target lock mark appearance
The size and thickness of the target lock mark indicates fish speed
and tracking status, as shown below.
Target lock
mark appearance
Meaning
Mark size indicates
relative speed.
Fast
Medium
Slow
Mark thickness shows
tracking status.
(More than 5
Tx cycles)
(Up to 3 Tx
cycles)
Figure 7-3 Target lock mark appearance
Erasing target lock mark
Target lock marks may be erased as follows:
1. Open the sub panel 2.
2. Select DELETE MK.
3. Press the [+] key for DELETE MARK FISH.
Choosing target lock mode
Two types of target lock are available: target mark and fish.
Target mark: Tracks the target lock mark, changing range and
tilt angle according to ship’s movement. The fish school itself is
not tracked.
Fish tracking: Tracks fish schoolís horizontal movement, chang-
ing range and tilt to track movement.
Do the following to select target lock type:
1. Open the sub panel 1.
2. Press the [MENU] key while pressing the up arrow key in
sub panel 1 to display the SYSTEM menu.
3. Select TARGET LOCK, and then press the [MENU] key.
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4. Select Tracking Method, and then press the [MENU] key.
5. Select method desired.
6. Press the [END] key several times to close the menu.
Tracking target lock mark
1. Operate the trackball to place the trackball mark on the fish
school you want to track.
2. Press the [TARGET LOCK] key to light the lamp above it.
The target lock mark ( ) appears on the fish school and
tracking begins.
Tilt angle is automatically changed to keep the target lock
mark location within the sonar beam.
3. To stop tracking, press the [TARGET LOCK] key again.
Note 1: If the target goes out of the picture or the tilt angle is
greater than 60 degrees the lamp above the [TARGET LOCK]
key flashes to call your attention.
Note 2: Target lock position and data are calculated according
to tilt angle.
Note 3: The bearing mark moves to the target lock mark loca-
tion when target lock becomes active. Bearing to the target lock
mark is shown.
Note 4: Target lock is temporarily disabled when the distance to
the tracked fish school is less then 40 m. It is resumed once the
distance becomes more than 40 m.
Note 5: The target lock works up to a tilt angle of 60 degrees. In
the drawing below, the tilt angle is fixed at 60 degrees between
B and C. During this period, however, calculation is continu-
ously being performed. When own ship comes to point C, target
lock is resumed.
A
B
C
D
60° 60°
Depth
Figure 7-4 Target lock and tilt angle
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Setting target lock conditions
1. Open the sub panel 1.
2. Press the [MENU] key while pressing and holding down the
down arrow key in sub panel 1.
3. Select TARGET LOCK with the arrow keys.
4. Press the [MENU] key.
SYSTEM MENU
TARGET LOCK
Select item with ↑ ↓ ← → keys and press MENU key.
Press END key to close menu.
Setting
Tracking Method
Track Echo Color
TGT Mark
Fish
Auto
Choose weakest echo to
track.
8
Setting range: 1 to 10
Setting range: 1 to 15
Set fish speed which
cancels target lock.
Fish Speed Limit
5kt
Set distance at which to
trace fish school track.
Fish Track Window
Fish Spd Update
Setting range: 2 to 20
10m
Choose update interval for
fish speed readout.
15 sec
30 sec
45 sec
60 sec
Choose size of target track
window (not shown).
Target LK Window
Normal Large Largest
Figure 7-5 Target lock menu
5. Press the up or down arrow key to choose item; right or left
arrow key to set option.
6. Press the [END] key several times to close the menu.
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Description of target lock items
TrackingMethod
Sets target lock function: target lock mark, fish or automatic.
Track Echo Color
Sets minimum echo signal level to track. A fish school whose
signal level is above the level set here is tracked.
Fish Speed Limit
Sets fish speed at which target lock is cancelled.
Fish Track Window
Set distance at which to track fish schoolís track when it exits
the tracking window.
Fish Speed Update
Selects update interval of fish speed readout; 5,10, 20 or 30 sec-
onds.
Target Lock Window
Sets size of target lock window. The window itself is not show
on the display.
NORMAL: 32 x 32
LARGE:
64 x 64
LARGEST: 128 x 128
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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 seabed
through the built-in speaker.
After you’ve become accustomed to monitoring fish aurally, you
should be able to detect a fish school from a range longer than
you can detect it on the screen. In addition you may judge whether
the fish school is approaching or going away; the tone becomes
higher when the school is approaching and lowers when the
school is going away.
1. Operate the trackball to place the trackball mark to the direc-
tion you want to monitor through the speaker.
2. Press the R/B key. The bearing mark appears on the display.
Echoes in a 30°, 60°, 90°, 180° or 330° sector centering the
bearing mark are monitored through the speaker. You can
adjust speaker volume with the AUDIO control.
3. To change coverage area, open the data setting window (sub
panel 2) and change width of AUDIO SECTOR.
4. To scan the coverage area, open the data setting window,
turn on AUTO SCAN and set scanning WIDTH.
Note: You can display the signal monitored through the loud-
speaker on the history display combination window by pressing
the HIST key, if AUDIO is selected on the HIST Window DSP
menu in the USER menu.
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The Fish Alarm
The fish alarm sounds an audible alarm when a fish echo above
a preset strength enters an alarm zone. You set parameters for
the fish alarm at ALM on the data setting window.
ON/OFF: Turn alarm on or off.
Level:
Zone:
Set echo strength level which will activate the alarm.
Set alarm zone.
1. Open the data setting window and select ALM•AUDIO.
2. Press the + key of the ZONE item.
3. Operate the trackball to place the trackball mark on the start-
ing point of the alarm zone.
4. Press the + key.
5. Rotate trackball clockwise to select the end point. The dis-
play paints a fan-shaped alarm zone.
6. Press the + key.
Starting
point
Alarm
zone
End
point
Figure 7-6 How to set the fish alarm zone
Note: 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). Otherwise, the unit paints a 360 degree
alarm zone as in (c) and (d).
More than 3°
Within 3°
(a)
(b)
(c)
(d)
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Relocating Fish School for Easy Observation
1. Operate the trackball to place the trackball mark on the posi-
tion where you want to relocate the own ship mark.
2. Press the OFF-CENT key.
3. To move the own ship mark back to the screen center, press
the OFF-CENT key again.
Fish
school
Press the
OFF-CENT key.
Own ship
mark
Place trackball
mark here,
for example.
Own ship mark
moves to trackball
mark position.
Figure 7-7 How to relocate fish schools
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Comparing of Fish School Concentration
You can get an estimate of the volume of two fish schools by
using the two ESTIMATE keys.
1. Operate the trackball to place the trackball mark on a fish
school, and then press the ESTIMATE 1 key.
The estimate mark appears on the fish school. Relative vol-
ume is shown by a figure between 0 and 100, below the es-
timate mark. When inside the mark is filled with reddish
brown, volume figure is “100”.
2. Operate the trackball to place the trackball mark on another
fish school and press the ESTIMATE 2 key.
3. Compare estimate figures for each fish school.
4. To turn off the estimate marks press their respective keys.
Estimate
mark 1
Estimate
mark 2
Estimate
mark 1
data
Estimate
mark 2
data
Figure 7-8 Estimate marks and their data
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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 head-
ing inputs.
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 in
step 1 and press the FISH key. The latest fish mark ( ) ap-
pears on the target and the 2nd latest fish mark ( ) appears
on the location selected at step 1.At the bottom left corner of
the screen, the distance between the two fish marks, and fish
school course and speed appear.
4. If you want to delete fish marks and fish speed marks, open
data setting window, select DELETE MK and then press the
FISH key.
Latest
fish mark
Latest fish
mark
Fish
movement
Figure 7-9 How to measure fish speed
Note 1: Movement is calculated using ship’s speed and bearing
inputs. Accordingly, pitching and rolling may affect the calcula-
tion. For better results, try the procedure two or three times to
verify reliability.
Note 2: The time and distance between pressings of the FISH
key should be as long as possible to increase accuracy of mea-
surement. For more accurate measurement repeat the procedure
two or three times.
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Note 3: Each time the FISH key is pressed the latest fish mark
and ship’s speed mark change in the sequence shown below:
Fish key pressed once:
↓
Fish key pressed twice:
→
↓
X
↓
Fish key pressed three times:
Fish key pressed four times:
→
↓
↓
↓
→
X
X
The Event Mark
The event mark is useful for finding the horizontal range, depth
and bearing to a location some distance from current position.
This function requires speed and heading inputs.
There are two types of event marks: event mark 1 and event
mark 2. 10 of each type of mark can be displayed. The unit marks
the latest one by ( ) for event mark 1 and by ( ) for event mark
2. Older event marks are displayed by a cross plus event number
(event mark 1) or an inverted Y with event number (event mark
2). When you enter more than ten event marks, the unit erases
the oldest mark, one by one.
1
2
3
2
3
1
Latest
Figure 7-10 Event marks
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Entering an event mark
1. Set the trackball mark where you want to place an event mark
(latest event mark).
2. Press an EVENT key. The horizontal range, depth and bear-
ing to the event mark appear at the bottom left corner of the
screen.
→234: Horizontal range (m) from own ship mark
↓19: Present depth (m) to mark
(35): Depth (m) of mark at moment EVENT key is pressed.
B265: Present bearing (degree)
Bottom left-hand corner of screen
(35)
Stored when
EVENT key is
pressed.
B
You observe picture from
direction of mark.
A
Figure 7-11 Event mark description
Plotting an event mark on the display is equivalent to dropping a
buoy with an anchoring chain that extends from surface to bot-
tom. The buoy is fixed at its present geographical location, but
the marker 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.
Erasing an event mark
Open the data setting window (sub panel 2) and select DELETE
MK. Press appropriate EVENT key to erase mark.
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True Motion Display
The relative motion display places the own ship mark at the screen
center, and echoes from fish and the seabed move on the screen
relative to own ship’s movement. This means that even when
the ship is dead in water, fish echoes move on the display.
In the true motion display, however, stationary objects are fixed
and own ship and fish echoes move on the display in accordance
with their true courses and speeds. Thus you can observe own
ship and fish echo movement with respect to the seabed.
Open the data setting window and select SONR•BEAM. Set UP/
TM in the SONAR menu to TM. This function requires speed
and heading inputs.
Although the true motion mode is available for use in all modes,
use in the combination mode is not recommended since the own
ship mark may move into the combination picture area.
Figure 7-12 True motion display
7-14
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Plotting Net Location Mark
Before shooting net, you will decide the shoot timing consider-
ing the water current direction, distance to fish school and mov-
ing direction of the fish school. Use the net location mark as a
guide to decide the timing.
This function requires speed and heading inputs.
1. Place the trackball mark on fish school to be caught.
2. Press the NET COURSE key. The net location mark is de-
picted by dotted ring with a diameter equivalent to that of
your purse seine net, being centered on the trackball mark.
Trackball
mark
Net location
mark
Figure 7-13 Net location mark
3. To adjust the location of net location mark, move the trackball
mark.
4. When the location is finalized, press the NET COURSE key
again. The dotted ring is replaced by solid ring and the lamp
above the NET COURSE key lights.
5. To erase the mark, press the NET COURSE key again.
You can adjust the diameter of the net location mark on NET
SHOOT PLAN in the DATA SET menu.
7-15
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Observing Net Behavior
With net sonde connection you can observe net behavior after
the throwing of the net, on the echo sounder combination mode.
Accurate depiction of net sonde position depends on proper set-
ting of the distances between net sonde transmitters. You can set
those distances on NET SONDE XMTR in the DATASET menu.
This function requires speed and heading inputs.
1. Press the SHOOT key just upon throwing the net into the
water.
Then, the net shooting mark ( ) appears at the own ship
mark and also at the right edge of the echo sounder picture.
Afterwards, whenever a net sonde transmitter on the net is
thrown into water, a net sonde mark appears on own ship
mark and moves with ship movement. The depths of net
sonde transmitter units are digitally displayed at the lower
left of the screen after the receiving transducer is placed into
water. The net sonde marks appear also on the echo sounder
picture as below, where the length of vertical line shows the
depth of the net sonde transmitter unit.
2. To erase net sonde mark and associated data, press the
SHOOT key again.
Figure 7-14 Net behavior
7-16
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Reducing Sea Surface Reflections
Sea surface reflections can be reduced by sharpening the hori-
zontal Rx beam width with the NARROW key. You may preset
the reduction level with NARROW in the SONR•BEAM menu
in the data setting window. The normal setting is 0. Increase the
setting when, for example, searching small fish. Note that it is
also useful to increase the setting when observing bottom condi-
tions, since the picture is more detailed.
Boosting Tx Power
When the NARROW key is turned on sea surface reflections are
suppressed, but small fish echoes are also suppressed. In this
case the “boost” feature may be useful.
Press the BOOST key to light the lamp above it. Tx power in-
creases and small fish school echoes are stressed.
When its use is not required turn off the BOOST key.
7-17
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PORT/STARBOARD, HORIZONTAL SLICE
DISPLAYS
The port/starboard display or horizontal slice display may be
displayed by pressing the [HIST] key. The display shown de-
pends on the setting of “HIST DSP/GRPH” in the USER menu.
Port/Starboard display
The port/starboard display takes echoes along the bearing (port,
starboard) selected on the SYSTEM menu and displays them on
the lower 1/3 of the screen. If the bearing width is set to 90
degrees, for example, the CSH-53 displays echoes in both port
and starboard directions. The picture is scrolled vertically to
downward.
↓
- - -
- - -
Port/Starboard
Sampling Angle
↓
- - -
B
- - -
Display
Sector
Picture Advance
Direction
Starboard
Direction
Port Direction
A
B
Port/starboard sampling angle can be set between 0 and
180 degrees. Setting sequence: SYSTEM menu, HIST
DISPLAY, PRT/STBD Sample.
Fixed at 6 degrees.
Figure 8-1 Port/starboard display
8-1
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Horizontal slice display
120 degrees of the picture in the horizontal direction is shown
for a given depth (D) in the horizontal slice window at the bot-
tom of the display. The area to display may be selected with the
[R/B] key.
↓
→
↓
k
Bearing Mark
Echo inside
this area is
shown in
window
120˚ (Fixed)
th
or
Range Mark
Color Bar
Picture
Advance
Direction
Latest Picture
ark
Own Ship
Stern Mark
→
120
30
↓123
D22
↓
→
: Range from own ship to cross cursor in stern
direction.
: Range from own ship to cross cursor in port-
starboard direction.
↓
: Slant range from own ship to cross cursor.
: Depth to cross cursor.
↓
D
Figure 8-2 Horizontal slice display
1. In the normal display, place the trackball mark on the echo
you want to see displayed in the horizontal display, then press
the [R/B] key.
The horizontal slice marker, 120° in width and centered on
the bearing mark, appears on the display. Echoes within the
marker appear in the window at the bottom of the display,
scrolling leftward.
2. Place the trackball mark in the horizontal slice window to
find data. The trackball mark changes to the cross cursor.
Range and depth to the cross cursor are shown.
Note 1: Picture advancement is synchronized with ship’s speed.
The picture does not advance when the ship is dead in water or
there is no speed input.
Note 2: The width of the horizontal slice marker may be changed
on the SYSTEM menu with H-Slice Width.
8-2
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SAVING, REPLAYING PICTURE
You can save either the whole screen or the echo inside the esti-
mate mark to the internal memory or a memory card.
Data to Save
Saving Method
Saving to
Whole picture, marks,
alphanumeric data
MEMO key and Memory card
menu setting
Echo inside estimate
mark
MEMO key and Internal memory
menu setting
Net shooting data
SHOOT key
Internal memory
Initializing Memory Cards
Before you save information to a memory card it must be ini-
tialized (formatted).
1. Press the MENU key to display the user menu.
2. Select the CARD UTILITY menu.
3. Select Initialize. It takes more than two minutes to initialize
a memory card.
4. Press the END key a few times to display the user menu.
The memory card stores 256k byte of data. This is equivalent to
about two picture screens or about 20 pictures of echo inside the
estimate mark. The following data are automatically saved as
system data when the memory card is initialized: panel setting,
function key settings, and menu settings.
9-1
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Saving the Picture
1. Press the MENU key to display the user menu.
2. Select SAVE PICTURE.
3. Select item to save:
Whole: Saves whole picture to memory card.
Est MK: Saves echo inside the estimate mark to internal
memory. (About 20 pictures can be saved.)
QK Save: Saves whole screen to the internal memory. (One
picture can be saved.)
4. Press the END key to close the user menu.
5. Press the MEMO key on the main panel.
It takes about two minutes to save a whole screen to a memory
card. During this time normal picture is displayed but the unit
accepts no key input.
Transferring Echo Data from Internal Memory to
Memory Card
1. Press the MENU key to display the user menu.
2. Press arrow keys to select CARD ECHO DAT.
3. The display shows all inside-estimate mark pictures stored
in the internal memory. Using the arrow keys select picture
to save to memory card.
4. Press the MENU key. The lamp to the right of the memory
card drive lights while picture data is being saved.
5. Press the END key several times to return to the USER menu.
9-2
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Saving Net Shooting Data
How net shooting data is saved
The unit starts accumulating net shooting data when the SHOOT
key is pressed. When net shooting is concluded by pressing the
SHOOT key again, the echo inside the estimate mark and other
net shooting data are saved to the internal memory. Note how-
ever that if ship’s movement between pressings of the SHOOT
key is less than 1/3 of the net length the unit judges that net
shooting is suspended and does not save net shooting data.
Transferring net shooting data to memory card
1. Press the MENU key.
2. Press arrow keys to select CARD NET DATA and press the
MENU key.
3. If desired, according to on-screen instructions, select fish
species to be added to net shooting data as a comment, and
then press the MENU key.
4. If desired, enter fish quantity estimate by:
a) selecting number with up or down arrow key
b) selecting place with right or left arrow key
c) registering value by pressing the MENU key.
Net shooting data contents
Net shooting data is comprised of the following:
• Echoes inside estimate mark (the ones which are displayed
the first time the SHOOT key is pressed)
• Ship’s position, date, time
• Ship’s track, net movement, current direction, water depth
and/or water temperature
• Net sonde mark
9-3
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Replaying Saved Data
Whole picture or echo inside estimate mark
1. Press the RECALL key (on the main panel).
2. Press the right or left arrow key in sub panel 1 to select item
to replay. The left arrow key selects older data (for example,
data in memory card); the right arrow key newer (for ex-
ample, data in internal memory).
3. After viewing picture, press the RECALL key to escape.
Note that the priority order for replay of echo inside estimate
mark is internal memory-saved picture followed by memory card
contents.
Net shooting data
1. Press the NET REPLAY key (on sub panel 1).
2. At the screen bottom, comments are listed. Select the item to
replay.
3. After viewing the data, press the NET REPLAY key again to
escape.
Deleting Memory Card Contents
You can delete unnecessary data from a memory card.
1. Press the MENU key to display the user menu.
2. Select the CARD UTILITY menu.
3. The card contents are listed at the screen bottom. Select data
to delete.
4. Press the MENU key.
5. Press the END key a few times to close the menu.
9-4
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TURNING MARKS, DATA ON/OFF
You can turn marks and data on or off through the data setting
window or the USER menu.
Turning marks on/off through the data setting
window
Select DELETE MK to delete the following marks:
Event Mark 1
Event Mark 2
Fish Mark
Each press of + or – deletes
mark selected, one by one.
Own Ship Mark
Ship's Track
Each press of + or – deletes
1/5 of overall length of track.
Turning marks on/off through the user menu
The following marks can be turned on/off on the USER menu:
User Menu
Display Item
DATA DISPLAY
MARK DSP 1
MARK DSP 2
Event Mark 1
Event Mark 2
Fish Mark
On Track Data
Text Window
ES Window
Range/Bearing
Heading Mark
Range Rings
Bearing Scale
Auto Scan Width
Auto Train Width
Ship's Track
Net Movement Plot
Fish MK Connect
Fish Tracking MK
Fish Track Plot
w/Current Vec
w/Current Vec
w/Current Vec
CURRENT VEC
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INTERPRETING THE DISPLAY
Seabed Echoes
When the tilt angle is widened, the seabed echo illustrated be-
low will appear on the display. When the tilt is narrowed, the
seabed trace becomes wider and weaker. By observing the sea-
bed condition on the display, the skipper can prevent net dam-
age.
(A) Flat seabed
Tilt angle: 10° to 15°
Narrow tilt angle
Only half of
vertical beam width
captures the seabed.
(B) Flat seabed
Tilt angle: 20° or more
Seabed is displayed
narrower and in
stronger colors when
compared to (A).
(C) Sloping seabed
Tilt angle: 20° or more
Shallow bottom
is displayed in
a strong color
and with a
short tail.
Seabed
The deeper seabed
echo is displayed in
a weak color and
with a long tail.
Figure 11-1 Seabed echoes
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Fish Schools
A fish school appears as a mass of echoes on the screen. The
color of the mass shows the density of fish schools on the sonar
beam. To find distribution and center point of a fish school, try
several different tilt angles.
(A) Sea surface fish
Tilt angle: -5° to 10°
Seabed echo not
displayed because
Fish
of narrow tilt angle.
school
Sea surface
reflections are
present.
Sea surface
reflections
(B) Midwater, bottom fish Tilt angle: 30° or more
Fish echo which appears before seabed can be detected.
Seabed
Fish
school
Large midwater
fish school is
present.
Tilt angle: -0° to 20°
Fish echo which appears together with
or after seabed can be detected.
Fish
school
Seabed
Figure 11-2 Fish schools
11-2
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Sea Surface Reflections
To reduce sea surface reflections, set the tilt angle to 5° or higher,
so the upper edge of the sonar beam does not hit the sea surface,
or adjust TVG. When a narrow tilt angle is used, sea surface
reflections cover a large area as illustrated below.
Sea surface
Tilt angle
indication
15°
Sea surface
reflections
Sea surface
15°
Figure 11-3 Sea surface reflections
Wake
A wake produced by own ship or another ship can be a strong
reflecting object when a narrow tilt angle is used. As the wake
appears as a thick continuous line, it can be easily distinguished
from a fish school. A wake contains many air bubbles which
attenuate ultrasonic energy, making it 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 turned)
Own ship's
screw noise
Figure 11-4 Wake appearance on the display
11-3
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False Echo by Sidelobe
An ultrasonic wave is emitted only in the direction set by the
TILT lever, however there are some emissions outside the main
beam. These are called sidelobes. The energy of the sidelobe is
fairly weak but when the water is comparatively shallow and the
bottom is rocky and hard, strong signals are detected by the
sidelobe. These are represented on the display as a false echo as
shown below.
Mainlobe
echo
Sidelobe
Sidelobe
Sidelobe
echo
The seabed echo
detected by sidelobe
appears at a certain
tilt angle when the
sidelobe points
vertically.
Figure 11-5 Sidelobe echoes
Noise and Interference
Interference from a sonar on board another ship appears on the
screen as shown in (A) below. This interference can be suppressed
by changing the CYCLE setting in TVG•TX on the data setting
window. Interference from electrical equipment on board own
ship appears as shown in (B) below. Noise from marine life ap-
pears on the display as shown in (C). Electrical interference and
marine life noise can be suppressed with IR on the SIGNAL
menu in the data setting window.
(A) Interference from
other sonar
(B) Electrical
interference
(C) Marine life noise
Figure 11-6 Noise and interference
11-4
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WARNINGS
Overvoltage Warning
If the input voltage to this unit rises above 125 VAC, the over-
voltage detection circuit activates, an alarm sounds and the mes-
sage OVERVOLTAGE appears at the screen center.
If this occurs, retract the transducer, turn the power off and check
the ship’s mains voltage. It should be about 100 VAC.
Unretracted Transducer Warning
If the transducer is not completely retracted within 30 seconds
after pressing c, an alarm sounds and the message XDCR NOT
RETRACTED! appears at the screen center.
If this occurs, do the following:
1. The power cannot be turned off because the transducer can-
not be retracted. Turn off the main breaker for the display
and power supply units to stop operation.
2. Confirm that the net is not tangled in the transducer.
3. Confirm that the breaker inside the raise/lower control box
(mounted on the hull unit) is on.
4. Remove the cover of the raise/lower control box. Push the
(Red) reset button to reset the raise/lower control box.
5. Turn on the power and press c to retract the transducer into
the tank. If it does not retract, the main shaft of the hull unit
may be bent. Turn off the power and manually raise the trans-
ducer up to the highest position by using the hand crank.
(See the illustration on the next page.)
12-1
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Reset Switch
h
TEST/NORMAL
switch
Breaker
Photo No. 1479
RAISE/LOWER CONTROL BOX
Photo No. 1744
HULL UNIT
Figure 12-1 Raise/Lower Control Box of the Hull Unit
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SELF TESTS
The CSH-53 has various self tests to check it for proper opera-
tion. If a test reveals equipment malfunction do not attempt to
check inside the equipment. There are no user serviceable parts
inside the equipment.
DANGER
Do not work inside the
equipment unless totally
familiar with electrical
circuits.
Hazardous voltage which will
cause death or serious injury
exists inside the equipment.
Opening the Self Test Menu
1. Turn on the power while pressing and holding down the
MENU key.
2. Press arrow keys to select SELF TEST.
INIT/SET MENU SELF TEST
Select item with dc keys and press MENU key.
Single
Continuous
Panel
Execute
Execute
Execute
Color
Gray
SIO
Execute
Execute
Execute
Figure 13-1 Self test menu
3. Press up or down arrow key to select test desired.
4. Press the MENU key to start test.
13-1
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Self Test Description
Single test
The ROM, RAM and other devices of the display unit are
checked once. Control is returned to the SELF TEST menu when
the test is completed.
START UP TEST
DCON
105-0350-1xx
105-0351-1xx
ROM
RAM
= OK
= OK
DPRAM = OK
P.W
= OK
DRAW
DUAL
ES
105-0366-1xx
105-0445-1xx
105-0381-1xx
ROM
RAM
= OK
= OK
105-0381-2xx
ROM
RAM
= OK
= OK
105-0382-1xx
ROM
RAM
= OK
= OK
SLICE
PSIO
PIF
105-0353-1xx
ROM
RAM
= OK
= OK
105-0352-1xx
ROM
RAM
= OK
= OK
105-0415-1xx
ROM
RAM
= OK
= OK
RX1
1X1
105-0226-001
ROM
ROM
=
=
OK RAM
OK RAM
=
=
OK
OK
RX2
1X2
ROM
ROM
=
=
OK RAM
OK RAM
=
=
OK
OK
Figure 13-2 Single test
Continuous test
The devices of the display unit are checked continuously.
CONTI TEST
DCON
ROM
=
=
=
=
=
=
=
OK
OK
OK
OK
OK
OK
OK
RAM
DROM
DPRAM
P.W
EEPROM
REACT
DRAW
ROM
=
=
=
=
=
OK
OK
OK
OK
OK
RAM
VRAM
DPRAM
CLT
DUAL
ES
ROM
=
=
=
OK
OK
OK
RAM
DPRAM
ROM
=
=
=
OK
OK
OK
RAM
DPRAM
SLICE
ROM
=
=
=
OK
OK
OK
RAM
DPRAM
PSIO
PIF
ROM
RAM
=
=
OK
OK
ROM
RAM
MEMCARD
=
=
=
OK
OK
OK
Figure 13-3 Continuous test
13-2
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Panel test
This test checks the keys of the main and sub panels and the
remote control box. Press and release each key. Its on-screen
location should display “1” when the key is pressed and “0”
when released. To escape from the test reset the power.
PANEL TEST
/
=
=
X
Y
Figure 13-4 Panel test
Color test
This test checks for proper display color. To escape from the
test reset the power.
COLOR TEST
Figure 13-5 Color test
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Gray test
This test checks for screen distortion. To escape from the test
reset the power.
GRAY TEST
Figure 13-6 Gray test
SIO test
This test checks for proper communication between the display
unit and transmitter unit, and requires a jumper plug. To escape
from the test reset the power.
SIO TEST
DRAW
IF
SIO
SIO
=
=
NG
NG
PISO
SIO1
SIO2
=
=
OK
NG
PIF
SIO1
=
OK
Figure 13-7 SIO test
13-4
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Interface Unit CS-120A Self Test
1. Open the cover of the interface unit.
2. Find DIP switch DP-1 on the lone circuit board. Turn switch
#6 on to start the self test. The results of the check appear on
the digital display beside the DIP switch.
3. Turn the DIP switch off after completion of the test.
Digital
display
Turn #6 on.
If the readout shows "0" the unit
is functioning properly. If it is
not working properly any of the
following nine numerals or six
alphabets appear.
Figure 13-8 Interface unit CS-120A, cover opened
13-5
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INPUT DATA SELECTION
Selection of Data on Interface Unit CS-120A
Nav data and fish data input from external equipment can be
turned on or off at DIP switch DP-1 in the Interface Unit CS-
120A.
Ship's speed and bearing (for track plotting, true motion, target lock, etc.)
Input Device
Gyrocompass, Speed log
GPS or DR (Note 1)
S1
S2
Select navigation which feeds
nav data for drawing ship's track
by switch S1 and S2.
OFF OFF
ON
ON
OFF
ON
OFF
ON
Current Indicator
DR or Current Indicator (Note 2)
ON
Note 1: GPS has priority. Switched automatically from GPS to DR when
GPS data is absent for more than 61 seconds or ship's speed measured with
GPS is 0.2 kts or less. If DR is not available when switched from GPS to
DR, heading readout is fixed at 0 degrees and ship's track is plotted by using
the last GPS data obtained before switching to DR. If you still require speed,
heading data from GPS even though ship's speed is less than 0.2 kts, set the
GPS forrnat to DR. Note however that the heading direction becomes erratic
if the ship's speed is less than 0.2 kts.
Standard
setting
ON
S1
S2
S3
S4
S5
Note 2: Use this setting when both DR and current indicator are available.
Normally DR data has highest priority, and is switched to current indicator
data if the DR data is absent for more than 61 seconds. The heading data for
the bearing scale is always provided from the current indicator. When DR
data is taken from GPS be sure to set GPS output format to "DR." GPS with
no "DR" output format cannot be used.
Ship's Position
Input Device
S3
OFF OFF
ON OFF
S4
Use this position for GPS or DR.
GPS data has priority.
Loran C
GPS or DR (See Note.)
Depth (echo sounder, color video sounder, etc.)
Input Device
Echo Sounder (Note 1)
GPS or DR (Note 2)
S5
OFF
ON
Note 1: For white line pulse when the
depth data is taken from an echo
sounder which does not have digital
depth output.
Note 2: When the depth data is taken
from an echo sounder which has digital
echo output (FE-822, FCV, ED-202,
IF-3000, or IF-5000).
Figure 14-1 DIP switch settings in the interface unit
14-1
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Setting Distances Between Net Sonde Transmitters
To accurately display the net shooting mark and net sonde mark
position, the distance between transmitters must be correctly
set. This is done on the DATA SET menu.
R0: Length of net from
its end to transmitter1
in meters.
R1: Length of net between
transmitters 1 and 2
in meters.
R1
R2: Length of net between
transmitters 2 and 3
in meters.
R2
R0
Figure 14-2 How to measure distances between transmitters
How to set net sonde transmitter distances
d
1. Press the MENU key while pressing and holding down
The DATA SET menu appears.
.
DATA SET MENU NET SONDE NET SONDE XMTR
Select item with dc[ \keys and press MENU key.
Press END key to close menu.
Qty
tSetting range: 0 to 10
s
:
:
:
:
3
0m
0m
0m
Distance 0
tSetting range: 0m to 9990m s
1
2
9
:
:
0m
0m
10
Figure 14-3 Data set menu
2. Select NET SONDE and then “Net Sonde XMTR.
3. Enter number of net sonde transmitters and their distances
between them.
14-2
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MAINTENANCE
DANGER
Do not work inside the
equipment unless totally
familiar with electrical
circuits.
Hazardous voltage which will
cause death or serious injury
exists inside the equipment.
Display Unit Maintenance
Handle the equipment with care.
Damage can cause corrosion.
Clean the screen and filter
regularly. Cover the equipment
when it is not in use.
Keep heater away from the
equipment.
An anti-static spray may be used
to clean the screen. Do not use
chemical-based cleaners; they can
remove paint and markings.
Heat can damage the
equipment. Allow sufficient
ventilation.
DISPLAY UNIT
Figure 15-1 Display Unit Maintenanc
Keep magnets and cassette tapes
away from the display unit.
Magnets or magnetic material can
can distort the picture.
15-1
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Hull Unit Maintenance
Apply MOLYTONE grease
#2 every six months.
Raise transducer and coat main
shaft with DAPHAECOROAEX #2
every six months.
CAUTION
The zinc block near the transducer
must be replaced yearly.
Dry dock ship and clean
transducer face yearly.
Apply single coat of
"MARINE STAR 20 Mod
(Red-N)" anti-foulant to
transducer face to keep
marine life off the transducer.
The junction between the transducer
and main shaft may corrode, which
can result in loss of the transducer or
water leakage inside the ship.
HULL UNIT
Figure 15-2 Hull Unit Maintenance
15-2
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MENU TREE
USER Menu
List
USER MENU
CARD UTILITY
Execute
Execute
Execute
Execute
Save
Delete
Initialize
Execute
Save
CARD ECHO DAT
CARD NET DATA
FUNCTION KEY
Save
Execute
Execute
Register
DATA DISPLAY
MARK DSP 1
MARK DSP 2
Event Mark 1
Event Mark 2
Fish Mark
ON
ON
ON
OFF
OFF
OFF
On Track Data
Text Window
ES Window
Depth Temp OFF
ON OFF
Current Sonde
Range/Bearing
Heading Mark
Range Rings
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Bearing Scale
Auto Scan Width
Auto Train Width
Ship's Track
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
Net Movement Plot
Fish MK Connect
Fish Tracking MK
Fish Track Plot
Hist Window Dsp
Fish Histogram
Audio PRT/STBD H-Slice
HIST DSP/GRPH
CURRENT VEC
ON
OFF
ON
ON
ON
OFF
OFF
OFF
w/Current Vec
w/Current Vec
w/Current Vec
Current Flow Dir
From To
Save Method
SAVE PICTURE
Whole Est MK QK Save
A-1
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DATA SET Menu
DATA SET MENU
COLOR CURVE
Sonar 1
Execute
Execute
Execute
Execute
Sonar 2
Echo Sounder 1
Echo Sounder 2
CHANGE COLOR
Sonar 1
Sonar 2
Echo Sounder
Marks
Execute
Execute
Execute
Execute
Execute
Menu
NET SHOOT PLAN
NET SONDE
Net Diameter
Tilt Interlock
Setting range: 200-1000 m
ON
OFF
Net Sonde XMTR
Net Length
Execute (Qty plus distances)
Setting range: 0-3000 m
Setting range: 0-1000 m
Setting range: 0-200 m
Wire Length
Net Width
NET PLOT CORR
Layer 1
Layer 2
Layer 3
Setting range: 0%-100%
A-2
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INIT SET/TEST Menu
INIT SET/TEST MENU
HEADING ADJ
Heading Adjust
Setting range: 0°-359°
BAUD RATE
I/F CS-120
Aux Port 1
Aux Port 2
Aux Port 3
NMEA
2400, 4800 bps
2400, 4800 bps
2400, 4800 bps
2400, 4800 bps
4800, 9600 bps
EXT KP
KP Out Polarity
EXT KP Polarity
Negative Positive
Negative Positive
UNIT/LANGUAGE
Depth
Meter Feet Fathom Passi
Mile Meter Feet
Dist for Shoot
Water Temp
Language
°C °F
English Japanese Korean
SELF TEST
Single
Execute
Execute
Execute
Execute
Continuous
Panel
Color
Gray
SIO
Execute
Execute
ECHO TEST
ES/NET REC
Display Test
Execute
Execute
Demonstration
ES/Audio Scale
ES Draft Adjust
ES 2 Select
Left Right
Setting range: 0-10 m
ES Net Rec
Net Rec Range
Setting range: 80-640 m
DEFAULTS
Defaults
Execute
Execute
Program Recall
A-3
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SYSTEM Menu
SIGNAL PROCESS
SYSTEM MENU
Smooth Echo - - - Rng
Setting range: 0 to 3
Setting range: 0 to 3
Setting range: 1 to 10
Smooth Echo - - - Cir
Delete Color
FAR TVG
Far TVG Curve
25log 30log 35log 40log
1.3R 1.6R
TM Display Range
TM DSP
TARGET LOCK
Tracking Method
Track Echo Color
Tracking Factor
TGT Mark Fish
Setting range: 1 to 15
Setting range: 1 to 10
Setting range: 1 to 10
Disable TGT Lock
Fish Spd Update
Target LK Window
5 10 20 30 Sec
Normal Large Largest
BRG READOUT
Course
32 Cmps 360° True
Current Data
Event Mark
32 Cmps 360° True
180° Rel 360° Rel
Other Marks
DATA DISPLAY
MARK SIZE 1
Control Setting
OFF Sonar TGT Lock
1 2 3 4
Text Window Data
Trackball Mark
Target Lock Mark
Event Mark 1
+(S) +(L) ꢀ (S) ꢀ (L)
(S)
(S)
(L)
(L)
Event Mark 2
Fish Mark
(S)
(L)
(S)
(S)
(L)
(L)
Own Ship Pos MK
MARK SIZE 2
Own Ship Mark
Net Shoot Mark
Estimate Mark
(S)
(S)
(L)
(L)
32 x 32 64 x 64
Normal Long
1/4 R 1/2R
Current Vector
Range Rings
Ship’s Track MK
5R 10R 20R 40R
ES/NET REC
ES 1 Color Curve
ES 2 Color Curve
Picture Advance
Linear log1 log2 log3
Linear log1 log2 log3
1/1 1/2 1/4 1/8
Advance at Shoot
Net Rec Picture
KP Sonde
UP/Down Down
(Continued on next page)
A-4
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SYSTEM MENU
HIST DISPLAY
INTERLOCK
H-Slice Width
1 2 4 8
(Continued from
previous page)
PRT/STBD Sample
Setting range: 0°-180°
Tilt
ON OFF
ON OFF
ON OFF
ON OFF
Range
Event Mark
Fish Mark
Net Shoot Mark
Target Lock
ON OFF
ON OFF
DEFAULTS
Defaults
Execute
A-5
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SPECIFICATIONS
Model: CSH-53-M 28 (Freq.: 28 kHz)
50 (Freq.: 50 kHz)
1. GENERAL
(1) Range, TX Cycle, Pulselength
Frequency
Range (m)
Off center "OFF" Off center "ON"
Basic
Range
TX Cycle
(sec)
Pulselength
(msec)
28 kHz 50 kHz
75
0 - 75
0 - 100
0 - 150
0 - 200
0 - 300
0 - 400
0 - 500
0 - 600
0 - 800
0 - 1000
0 - 1200
0 - 1600
0 - 2000
0 - 3000
0 - 100
0 - 133
0 - 240
0 - 320
0 - 480
0 - 640
0 - 800
0 - 960
0 - 1280
0 - 1600
0 - 1920
0 - 2560
0 - 3200
0 - 4800
0.09 - 0.32
0.14 - 0.39
0.21 - 0.53
0.28 - 0.64
0.41- 0.85
0.54 - 1.06
0.68 - 1.28
0.81 - 1.49
1.08 - 1.92
1.34 - 2.34
1.61 - 2.77
2.14 - 3.62
2.68 - 4.48
4.00- 6.69
0.5 - 1
0.5 - 2
0.5 - 3
0.5 - 4
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
100
150
200
v
v
v
v
v
v
v
v
v
v
v
300
0.5 - 6
400
0.7 - 8
500
0.9 - 9
600
1.1 - 11
1.5 - 15
2.0 - 19
2.0 - 19
2.0 - 19
2.0 - 19
5.7 - 20
800
1000
1200
1600
2000
3000
NOTE
1) Transmission cycle is selectable in 10 steps.
2) External keying pulse can be used as a trigger.
3) Maximum range scale does not mean maximum range.
Detection capability depends on nature of fish school and sea condition.
(2) Audio Search
Sector:
Method:
Output:
30º, 60º, 90º, 180º, 330º,selectable
By built-in loudspeaker
2 W
Frequency: 1.1 kHz with reverberation effect
SP-1
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(3) Transceiver
Transmitter:
Receiver:
High power MOS FET amplifier with 10-step power reduction switch
Low noise superheterodyne, continuously scanning beam forming,
TVG, AGC, signal/processing, interference rejecter, horizontal vertical
beam switching.
(4) Beamwidth (-3 dB) and Tilt Angle
TX Beamwidth: 360º (horizontal) x 10º to 16º (Vertical)
RX Beamwidth: 9º to 18º (horizontal) x 13º to 16º (Vertical)
NOTE: Beamwidth depends on transmitter freqeency.
Tilt Angle:
-5º (upward) to 60º (downward), continuous.
2. Display
(1) Picture display PPI display on 15 inch non-glare, high-resolution color CRT
(2) Color
16 colors (sonar picture), 4 colors (marks)
(3) Display mode
a) Normal Mode (*with or without data display)
b) Off-center
c) *True motion
d) Echo sounder combination (normalplus echo sounder)
e) Audio combination
f) Port/ starboard combination
g) Horizontal slice combination
(4) Display Marks Own ship mark, heading mark, range rings, range/bearing mark,
trackball mark, event mark, net shooting mark, fish mark, estimate
mark,bearing scale, *north mark, *ship’s track, *current mark, *net
sonde mark
(5) Alphanumeric Data
Sonar picture (range, tilt angle, gain)
Trackball mark data (slant range, horizontal range, depth, bearing)
Event mark data (horizontal range, depth, first event marked
depth,bearing)
Fish mark data (*distance moved, *direction and *speed between two
latest fish marks)
Estimate mark data (estimation of fish volume by echo strength)
Net shooting data (new setting appears in larger characters for 5
seconds when changed)
*Current data (current speed, direction, layer, depth)
*Navigation data (ship’s speed, heading, water depth, water tempera
ture)
*Own ship’s position (latitude/longitude)
Net sonde data *(net depth, distance to seabed, water temperature,
sinking speed of net)
SP-2
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(6) Features
Custom mode, interference rejector, afterglow, noise limiter, delete
color, memory card (save and recall of picture, echo inside estimate
mark and net shooting data), automatic tilt,* automatic target tracking
(target lock), external KP sync, heading up, *north up, fish alarm,
overvoltage warning, unretracted transducer warning, remote control
*: External sensor required.
3. HULL UNIT
800 mm Travel
600 mm/800 mm
1200 mm Travel
800 mm/1200 mm
XDCR Travel
Raising Time
Lowering Time
Driving System
16 sec
15 sec
22 sec
20 sec
Remote electric control
Allowable ship's speed 18 knots (15 knots during raise/lower operation)
4. POWER CONSUMPTION
100VAC, 50/60Hz, 1φ, 500VA on average, 1kVA max.
110/115/120/200/210/220/230/240VAC operation available with
stepdown transformer PT-400 for display unit.
5. EMBIRONMENTAL CONDITION
(1) Temperature
0 ºC to 50 ºC
(2) Relative Humidity
85% or less
6. COATING COLOR
(1) Display Unit:
N3.0 Newton No.5 for front panel
Munsell 2.5GY 5/1.5 for cabinet
(2) Transceiver Unit and Hull Unit
Munsell 2.5G 7/2 Newton No.5
SP-3
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INDEX
A
N
AGC................................................................ 3-3
2AGC.............................................................. 3-3
Audio .............................................................. 7-7
Nav Data ......................................................... 4-6
Net Behavior................................................. 7-16
Net Location Mark ....................................... 7-15
Net Shooting Mark ......................................... 9-4
Net Sonde Data............................................... 4-6
Net Sonde Mark.............................................. 9-4
Net Sonde Transmitter.................................. 14-2
Noise ............................................................. 11-4
Noise Limiter (NL)......................................... 3-6
Normal Display Mode .................................... 4-1
Normal Display Mode w/text ......................... 4-2
North Mark ..................................................... 4-4
B
Beamwidth...................................................... 1-7
C-
Color Bar ........................................................ 4-7
D
DATA SET Menu ........................................... 5-8
Data Setting Window ..................................... 1-5
Display Mode ................................................. 2-2
E
O
Echo Sounder Combination Display .............. 4-2
Eliminating Unwanted Feeble Echoes ........... 3-1
Estimate Mark ................................................ 4-6
Event Mark ................................................... 7-12
Overvoltage Warning.................................... 12-1
P
Port/starboard Display .................................... 8-1
Pulselength ..................................................... 3-3
F
R
False Echo .................................................... 11-4
Fish Alarm ...................................................... 7-8
Fish Mark ....................................................... 4-5
Fish Movement ............................................... 4-5
Fish School ................................................... 11-2
Fish School Center ......................................... 7-1
Fish School Speed ........................................ 7-11
Fish Tracking .................................................. 7-3
F-shift ............................................................. 3-6
Function Key .................................................. 6-1
Range and Bearing ....................................... 12-7
Range Ring ..................................................... 4-5
Rejecting Sonar Interference .......................... 3-4
Remote Control Box....................................... 1-8
S
Saving the Picture........................................... 9-2
Seabed.................................................... 2-3, 11-1
Sea Surface Reflection ................................. 11-3
Self Test ........................................................ 13-1
Ship's Track Mark........................................... 4-6
Sidelobe ........................................................ 11-4
Sub Panel 1 ..................................................... 1-4
Sub Panel 2 ..................................................... 1-5
Suppressing Seabed Tail................................. 3-3
SYSTEM Menu .............................................. 5-5
G
GAIN .............................................................. 2-7
H
Heading Data .................................................. 4-4
Heading Mark ................................................. 4-5
History Display............................................... 4-3
HOR................................................................ 3-6
Horizontal Slice Display ................................ 8-2
T
Target Lock ..................................................... 5-6
Target Lock Mark ........................................... 4-7
Tilt Angle ........................................................ 2-3
TILT Lever ..................................................... 2-3
Trackball Mark ............................................... 4-4
Transducer Warning ..................................... 12-1
True Motion Display .................................... 7-14
TVG ................................................................ 3-1
Tx Cycle ......................................................... 3-5
I
INIT SET/TEST menu ................................. 5-11
Interface Unit................................................ 13-5
Interference................................................... 11-4
Interference Rejector (IR) .............................. 3-5
M
Main Panel...................................................... 1-2
Marks and Data .............................................. 4-1
Memory Card ................................................. 9-1
Memory Card Initialization ............................ 9-1
Menu Tree...................................................... A-1
U
User Menu ...................................................... 5-1
User Menu Tree ............................................ 10-1
V
VER ................................................................ 3-6
IN-1
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