Furuno CH-500, CH-600 Operator's Manual

OPERATOR'S MANUAL

SEARCHLIGHT SONAR/

DUAL-FREQUENCY

SEARCHLIGHT SONAR

CH-500

Model

CH-600

www.furuno.com

The paper used in this manual

9-52 Ashihara-cho,

A:MAR

2017

.

D:APR.06, 2018

Pub. No.

(

)

Nishinomiya, 662-8580, JAPAN

is elemental chlorine free.

・FURUNO Authorized Distributor/Dealer

All rights reserved.

TAYA

CH-500/CH-600

Printed in Japan

OME-13540-D

0 0 0 1 9 2 2 0 8 1 3

IMPORTANT NOTICES

General

• This manual has been authored with simplified grammar, to meet the needs of international users.

• The operator of this equipment must read and follow the descriptions in this manual.
Wrong operation or maintenance can cancel the warranty or cause injury.

• Do not copy any part of this manual without written permission from FURUNO.

• If this manual is lost or worn, contact your dealer about replacement.

• The contents of this manual and equipment specifications can change without notice.

• The example screens (or illustrations) shown in this manual can be different from the screens you
see on your display. The screens you see depend on your system configuration and equipment
settings.

• Save this manual for future reference.

• Any modification of the equipment (including software) by persons not authorized by FURUNO will
cancel the warranty.

• The following concern acts as our importer in Europe, as defined in DECISION No 768/2008/EC.

- Name: FURUNO EUROPE B.V.

- Address: Ridderhaven 19B, 2984 BT Ridderkerk, The Netherlands

• All brand and product names are trademarks, registered trademarks or service marks of their
respective holders.

How to discard this product

Discard this product according to local regulations for the disposal of industrial waste. For disposal in
the USA, see the homepage of the Electronics Industries Alliance (http://www.eiae.org/) for the
correct method of disposal.

How to discard a used battery

Some FURUNO products have a battery(ies). To see if your product has a battery, see the chapter
on Maintenance. Follow the instructions below if a battery is used. Tape the + and - terminals of bat­tery before disposal to prevent fire, heat generation caused by short circuit.

In the European Union
The crossed-out trash can symbol indicates that all types of batteries
must not be discarded in standard trash, or at a trash site. Take the
used batteries to a battery collection site according to your national
legislation and the Batteries Directive 2006/66/EU.

In the USA
The Mobius loop symbol (three chasing arrows) indicates that
Ni-Cd and lead-acid rechargeable batteries must be recycled.
Take the used batteries to a battery collection site according to
local laws.

In the other countries
There are no international standards for the battery recycle symbol. The number of symbols can in­crease when the other countries make their own recycle symbols in the future.

Ni-Cd Pb

Cd

i

SAFETY INSTRUCTIONS

The operator must read the safety instructions before attempting to operate the equipment.

DANGER

WARNING

CAUTION

Warning, Caution

Indicates a potentially hazardous situation which, if not avoided,
will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
could result in minor or moderate injury.

Prohibitive Action

DANGER

Keep away from raise/lower shaft in
hull unit when the shaft is moving.

Contact with the gears and raise/lower
shaft will cause serious injury.

WARNING

Mandatory Action

WARNING

Do not disassemble or modify the
equipment.

Fire, electrical shock or serious injury
can result.

Make sure no rain or water splash
leaks into the equipment.

Do not open the equipment.

The equipment uses high voltage that
can cause electrical shock. Refer any
repair work to a qualified technician.

If water leaks into the equipment or
something is dropped into the equip­ment, immediately turn off the power
at the switchboard.

Fire or electrical shock can result.

If the equipment is giving off smoke
or fire, immediately turn off the power
at the switchboard.

WARNING

Fire or electrical shock can result.

Fire or electrical shock can result if
water leaks into the equipment.

Do not operate the equipment with
wet hands.

Electrical shock can result.

Use the proper fuse.

Use of the wrong fuse can cause fire or
electrical shock.

If you feel the equipment is acting
abnormally or giving off strange
noises, immediately turn off the
power at the switchboard and contact
a FURUNO service technician.

ii

SAFETY INSTRUCTIONS

CAUTION

CAUTION

CAUTIO

To prevent damage to the transducer,
the maximum ship’s speed while the
transducer is projected or being
raised or lowered is as follows:

Projected

Max. 20 kn Max. 15 kn

Observe the following when using
sonar oil.

Precautions

•

Keep the sonar oil away from eyes.
Wear protective goggles when
working with the sonar oil.

•

Do not touch the sonar oil. Wear
protective gloves when working with
the sonar oil.

•

The sonar oil can cause inflammation
of the skin.

•

Do not ingest the sonar oil. Diarrhea
and vomiting can result.

•

Keep the sonar oil out of reach of
children.

Emergency procedures

•

If the sonar oil enters eyes, flush with
clean water for about 15 minutes.
Consult a physician.

•

If the sonar oil contacts skin, flush the
area with clean water.

•

If the sonar oil is ingested, see a
physician immediately.

Storage

Seal container to keep out foreign
material. Store in dark, cool place.

Disposal of sonar oil and its container

Dispose of the sonar oil and its container
in accordance with local regulations. If
you are unclear about the disposal
procedure, contact the place of purchase.

Raising or
lowering

CAUTIO

Retract the transducer before turning
the power off.

Damage to the equipment can result.
Wait until the transducer retraction switch
[ ] lights steadily, then turn the power off.

Do not paint the transducer, and
handle it with care.

Paint affects sensitivity.

Do not place liquid-filled containers on
or near the equipment.

Fire or electrical shock can result if a liquid
spills into the equipment.

Keep the raise/lower unit powered
when underway.

Failure to keep the raise/lower unit
powered can result in damage to the
raise/lower unit or loss of the transducer.

Warning Label(s)

Warning label(s) is(are) attached to the equipment.
Do not remove the label(s). If a label is missing or
damaged, contact a FURUNO agent or dealer about
replacement.

WARNING

To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.

Name: Warning Label 1
Type: 86-003-1011-1
Code No.: 100-236-231

Electrical shock hazard.
Do not remove cover.
No user-serviceable parts inside.
Turn off power before servicing.
And wait until charge lamp (green)
goes off and then remove cover.

Name: Warning Label
Type: 10-071-5313
Code No.: 100-291-160

To avoid electrical shock,
do not remove cover.
No user-serviceable parts
inside.

Keep fingers away from
gears.
Shaft may cause injury.
Keep away from
moving shaft.

Remove marine life from the face of
the transducer when the ship is
dry-docked.

Marine life affects the performance of
transmission/reception and results in low
sensitivity.

Name: Warning Label
Type: 10-079-6144
Code No.: 100-310-880

Name: Warning Label (2)
Type: 03-129-1001-1
Code No.: 100-236-741

iii

TABLE OF CONTENTS

FOREWORD..................................................................................................................vii

SYSTEM CONFIGURATION ..........................................................................................ix

1. OPERATIONAL OVERVIEW................................................................................ 1-1

1.1 Description of Controls...............................................................................................1-1

1.1.1 Control Units ..................................................................................................1-1

1.1.2 Remote Control Unit CH-256 (option)............................................................1-2

1.2 How to Turn the Power On/Off...................................................................................1-2

1.2.1 How to turn the power on...............................................................................1-2

1.2.2 How to turn the power off...............................................................................1-3

1.3 How to Raise/Lower the Transducer..........................................................................1-3

1.3.1 How to lower the transducer ..........................................................................1-3

1.3.2 How to raise the transducer...........................................................................1-4

1.4 How to Adjust the Brilliance .......................................................................................1-4

1.5 How to Select a Display Mode ...................................................................................1-5

1.6 How to Adjust the Gain ..............................................................................................1-7

1.7 How to Use the Menu.................................................................................................1-8

1.8 Noise and Interference...............................................................................................1-9

1.8.1 Sea Surface Reflections (Horizontal Mode)...................................................1-9

1.8.2 Wake Noise (Horizontal Mode)......................................................................1-9

1.8.3 Sidelobe Echo/False Echo (Horizontal Mode) .............................................1-10

1.8.4 False Echo (Vertical Mode)..........................................................................1-10

1.8.5 Interference from other equipment...............................................................1-11

1.8.6 Interference from marine life........................................................................1-11

1.8.7 How to erase weak echoes..........................................................................1-12

1.9 How to Use the Cursor.............................................................................................1-12

1.10 How to Adjust the Range .........................................................................................1-13

1.11 How to Use the Train Controls.................................................................................1-14

1.11.1 How to change the train direction.................................................................1-14

1.11.2 Train controls for horizontal mode................................................................1-14

1.11.3 Train controls for vertical mode....................................................................1-15

1.11.4 Train control for echo sounder mode...........................................................1-15

1.12 How to Use the Tilt Controls ....................................................................................1-16

1.12.1 Tilt control for horizontal modes...................................................................1-16

1.12.2 Tilt control for vertical mode.........................................................................1-16

1.12.3 Tilt control for echo sounder mode...............................................................1-16

1.13 How to Use the Sector Function ..............................................................................1-17

1.13.1 How to set and use a sector with horizontal mode.......................................1-17

1.13.2 How to set and use a sector with vertical mode...........................................1-18

1.13.3 How to set a sector center (vertical mode only)...........................................1-19

1.14 How to Use the Event Marker ..................................................................................1-20

1.14.1 How to inscribe an event mark.....................................................................1-20

1.14.2 How to delete event marks...........................................................................1-2

1.15 How to Use the Range/Bearing Marker ...................................................................1-21

1.16 How to Use the Tracking Function...........................................................................1-23

1.16.1 How to select the tracking method...............................................................1-23

1.16.2 Position tracking function.............................................................................1-23

1.16.3 Echo tracking function..................................................................................1-24

1.16.4 Reverse tracking function (Horizontal mode only) .......................................1-25

iv

TABLE OF CONTENTS

2. HORIZONTAL MODE............................................................................................2-1

2.1 Operational Overview................................................................................................ 2-1

2.2 Horizontal Menu Overview ........................................................................................ 2-2

2.3 Mix Display (CH-600 only)......................................................................................... 2-3

2.4 Typical Horizontal Mode............................................................................................ 2-5

2.5 Full-circle A-Scope Mode .......................................................................................... 2-6

2.6 Horizontal Mode (Zoomed)........................................................................................ 2-7

2.7 Horizontal + History Mode......................................................................................... 2-8

2.8 Horizontal + Vertical Mode ........................................................................................ 2-9

2.9 How to Choose a Frequency (CH-600 only)............................................................ 2-10

2.9.1 Choosing the frequency............................................................................... 2-10

2.9.2 Choosing the combination display............................................................... 2-11

2.10 How to Interpret the Horizontal Display................................................................... 2-12

2.11 How to Select the Training Speed........................................................................... 2-15

2.12 How to Use the Vertical Search Feature................................................................. 2-15

2.13 How to Adjust the Picture........................................................................................ 2-16

2.13.1 How to suppress seabed/surface reflections with TX power....................... 2-16

2.13.2 How to suppress bottom tail with pulselength ............................................. 2-16

2.13.3 How to display weak echoes clearly with TVG............................................ 2-17

3. VERTICAL SCAN MODE ......................................................................................3-1

3.1 Vertical Mode............................................................................................................. 3-1

3.2 Vertical Menu Overview............................................................................................. 3-2

3.3 How to Interpret the Vertical Scan Display................................................................ 3-3

3.4 How to Toggle Full/Half Range Scans....................................................................... 3-4

3.5 How to Select the Training Speed............................................................................. 3-4

3.6 How to Adjust the Picture .......................................................................................... 3-4

4. ECHO SOUNDER MODE ......................................................................................4-1

4.1 Typical Echo Sounder Display................................................................................... 4-1

4.2 Echo Sounder Menu Overview.................................................................................. 4-2

4.3 How to Adjust the Range........................................................................................... 4-3

4.4 How to Adjust the Tilt................................................................................................. 4-3

4.5 How to Select the Picture Advance Speed................................................................ 4-3

4.6 How to Adjust the Picture .......................................................................................... 4-4

4.6.1 How to adjust the TVG for echo sounder mode............................................ 4-4

4.6.2 How to find echo strength with the A-Scope.................................................. 4-6

5. MENU OPERATIONS............................................................................................5-1

5.1 How to Access and Use the Menu ............................................................................ 5-1

5.2 How to Change the Displayed Language.................................................................. 5-2

5.3 COM1 Menu .............................................................................................................. 5-2

5.4 COM2 Menu .............................................................................................................. 5-3

5.5 System Menu ............................................................................................................. 5-4

5.6 FUNC Key Menu ....................................................................................................... 5-5

5.6.1 How to setup the function keys...................................................................... 5-5

5.6.2 Short-cut keys................................................................................................ 5-5

5.6.3 Preset keys.................................................................................................... 5-6

5.7 How to Adjust the Preset Range Settings ................................................................. 5-7

5.8 How to Enable/Disable Train Speed Presets ............................................................ 5-8

5.9 How to Change the Displayed Colors........................................................................ 5-8

5.10 How to Backup/Restore Settings............................................................................... 5-9

5.11 How to Adjust the Transmission Frequency............................................................ 5-10

v

TABLE OF CONTENTS

5.12 How to Adjust the Speaker Settings.........................................................................5-11

5.12.1 How to adjust the speaker frequency...........................................................5-11

5.12.2 How to select the speaker bandwidth ..........................................................5-11

5.12.3 How to set the harmonic pattern..................................................................5-12

5.12.4 How to filter for doppler shift ........................................................................5-12

5.13 How to Use the Simulation Mode.............................................................................5-13

5.14 How to Restore the System Menu to Default Settings.............................................5-14

5.15 System Settings menu .............................................................................................5-15

6. MAINTENANCE, TROUBLESHOOTING.............................................................. 6-1

6.1 Preventative Maintenance..........................................................................................6-1

6.2 How to Clean the Equipment .....................................................................................6-1

6.3 Hull Unit Maintenance................................................................................................6-2

6.3.1 Hull unit lubrication.........................................................................................6-2

6.3.2 Manually raise/lower the transducer ..............................................................6-3

6.4 Transducer Maintenance ...........................................................................................6-4

6.5 How to Replace the Fuses.........................................................................................6-4

6.6 Troubleshooting .........................................................................................................6-5

6.7 Error Messages..........................................................................................................6-6

6.8 Diagnostics.................................................................................................................6-7

6.8.1 How to perform a full system test...................................................................6-7

6.8.2 How to test the LCD.......................................................................................6-8

6.9 How to Remove and Re-install the Display Unit ........................................................6-9

6.9.1 How to remove the display unit......................................................................6-9

6.9.2 How to re-install the display unit ....................................................................6-9

APPENDIX 1 MENU TREE ......................................................................................AP-1

SPECIFICATIONS .....................................................................................................SP-1

INDEX..........................................................................................................................IN-1

vi

FOREWORD

Congratulations on your choice of the FURUNO Searchlight Sonar CH-500, Dual Frequency
Searchlight Sonar CH-600. We are confident you will see why the FURUNO name has become
synonymous with quality and reliability.

Since 1948, FURUNO Electric Company has enjoyed an enviable reputation for innovative and
dependable marine electronics equipment. This dedication to excellence is furthered by our ex­tensive 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 installed, operated and
maintained properly. Please carefully read and follow the recommended procedures for operation
and maintenance.

Features

The CH-500 is a searchlight sonar and the CH-600 is a dual-frequency searchlight sonar. These
systems consist of a display unit, a control unit, a transceiver unit and a hull unit.

The main features are:

• Multiple display modes to assist in tracking and monitoring fish schools.

• Customizable function keys for quick access to regularly used functions.

• Display of various data (such as own ship location, depth, etc.) with connection to the appropri­ate sensors.

• The hull unit automatically raises the transducer when ship’s speed exceeds the pre-set speed
(requires input of speed data).

• CH-600 can mix the echo of the high frequency and the low frequency. This is useful to identify
the small seabed fish which are difficult to identify.

Usage precautions

• If the equipment will not be used for a long time, turn the power off at the mains switchboard to
prevent battery discharge.

• If the soundome is to be operated while the ship is dry-docked, set the transmitter output power
to “minimum” from the menu. Damage to the train-tilt section may result if the soundome is op­erated with maximum power while the ship is dry-docked.

• When the ship is dry-docked check for signs of corrosion on the soundome. Find the reason for
the corrosion and attach a zinc plate to the hull unit as an anti-corrosion measure if necessary.

Procedures to suppressing the interference

When asked to suppress the interference from other ships, perform the following procedures.
The priority to perform the following procedures is as follows.

1. Broadband fish finder or sonar.

2. Multiple frequency fish finder or sonar.

3. Single frequency fish finder or sonar.

• Change the TX frequency.

• Lower the TX power.

vii

FOREWORD

• Change the TX cycle.
The CH-500 has the third priority and the CH-600 has the second priority.

Standards used in this manual

• The keys and controls on the Control Units (CH-502, CH-602, CH-256) are shown in bold face;
for example, the MENU key.

• Menu items and pop-up dialog box names are shown in brackets; for example, [BRILLIANCE]
dialog box.

CE declaration

With regards to CE declarations, please refer to our website (www.furuno.com) for further infor­mation about RoHS conformity declarations.

viii

SYSTEM CONFIGURATION

Remote

Controller

CH-256

Remote

Controller

CH-256

Display Unit

MU-121C

Control Unit

CH-502
CH-602

External monitor*

(MU-150HD or

market equivalent)

*: XGA only.

Transceiver Unit

CH-503

KP signal

NMEA2000

NMEA0183×2

Rectifier Unit

RU-1746B-2

100/110/220/

230 VAC,

1ø, 50/60 Hz

12-24 VDC

Loudspeaker

CA-151S-ASSY

Navigational Equipment/

Fish Finder/

Heading Sensor/

Current Indicator/

Water Temp.Sensor

Sonar/

Fish Finder/

Current Sensor

Control Unit

CH-502
CH-602

Hull Unit

CH-504/505

: Standard supply
: Option or local supply

NMEA2000 Equipment

12/24 V DC

Rectifier Unit

RU-1746B-2

100/110/220

/230 VAC,

1ø, 50/60 Hz

ix

SYSTEM CONFIGURATION

This page is intentionally left blank.

x

1. OPERATIONAL OVERVIEW

1.1 Description of Controls

1.1.1 Control Units

Control Unit CH-502 (for CH-500)

Control Unit CH-602 (for CH-600)

LF

MIX

HF

No. Control name Description

1 POWER key Turns the power on/off. See section 1.2.
2 XDR up/down keys Raises/lowers the transducer. See section 1.3.
3 GAIN (PUSH) knob Adjusts receiver sensitivity (gain). See section 1.6.
4 SECTOR knob Selects training sector width. See section 1.13.
5 TRAIN knob Selects the center bearing for the training sector. See

section 1.11.
6 RANGE knob Selects detection range. See section 1.10.
7 TILT knob Controls scanning center direction. See section 1.12.
8 Cursorpad • Moves the cursor.

• Selects menu items and menu options.

9 Display Mode keys Changes the display mode. See section 1.5.

1-1

1. OPERATIONAL OVERVIEW

No. Control name Description

10 Scan/track keys • Toggle between full-range scan (360°) and half-range scan

(168°). See section 1.13.

• Reverse the scanning direction. See section 1.11.1.

• Change the train speed. See section 2.11.

• Activate/deactivate the tracking function. See section 1.16.
11 Function keys Performs custom operations or functions. See section 5.6.
12 Brilliance key Adjusts screen and panel brilliance. See section 1.4.
13 Event Mark key Places an event mark at the cursor location.

Output own ship position data from NMEA2000 port.

See section 1.14.
14 Range/Bearing Mark key Shows the range/bearing marker. See section 1.15.
15 MENU key Opens the menu. See chapter 5.

1.1.2 Remote Control Unit CH-256 (option)

You can operate the system from up to five meters away with the optional remote con­trol unit.

Note: You can also operate the system while observing the display, if the remote con­trol is installed near the display unit.

No. Key name(s) Description

1 RANGE Selects detection range.
2 TILT Controls scanning direction.
3 FULL/HALF Selects sounding area.
4 TARGET Turns target lock on/off, or re-

1.2 How to Turn the Power On/Off

verses scanning direction.

1.2.1 How to turn the power on

Press the POWER key to turn on the system power. The key makes a “click” sound
and the system releases a “beep” sound, the LED above the power switch lights up
and the start-up screen appears. When the start-up process completes, the last used
screen is displayed.

Note 1: When turning on the system, make sure that five seconds have passed from
turning off the system.

Note 2: When language selection window appears, refer to the "How to Change the
Displayed Language" on page 5-2.

1-2

1.2.2 How to turn the power off

CAUTION

It is recommended to retract the transducer before you turn the power off. Also, to
avoid excessive stress on the hull unit’s shaft, reduce your speed to below 15 knots
before retracting the transducer.

1. Reduce speed to below 15 knots.

2. Press the XDR up key to raise the transducer. The XDR LED flashes to indicate
that the transducer is moving. When retraction is complete, the LED stops flashing
and lights steadily. You can also confirm the raise/lower status of the transducer
on-screen, by checking the raise/lower indication at the top-right of the screen.

3. Confirm that the transducer is fully retracted, then press the press the POWER
key until you hear a “click” sound, then keep the key pressed. A dialog box show­ing a countdown appears during the power-down process.

1. OPERATIONAL OVERVIEW

Transducer raise/lower
status indication

Note 1: If the transducer is not retracted before the power-down process, at the one­second-mark of the countdown the message "Retracting" appears and the system au­tomatically raises the transducer. When the transducer is fully retracted, the power­down process is completed.

Note 2: For configurations with two CH-502/CH-602 control units, check that the con­trol unit which turned the power on is used to turn the power off. If wrong controller is
used, the system will not turn off.

Note 3: To avoid any damage to the transducer, always raise the transducer BEFORE
you turn the power off. See section 1.3.

1.3 How to Raise/Lower the Transducer

CAUTIO

Do not exceed 20 knots when operating the
equipment and do not exceed 15 knots when
lowering or raising the transducer.

Failure to keep to the prescribed speeds can
damage the transducer and hull unit.

1.3.1 How to lower the transducer

When you reach your fishing ground, do the following:

1. Press the XDR down key ( ) to lower the transducer. The lamp above the
key flashes to indicate that the transducer is being lowered. When the transducer

is completely lowered, the lamp lights steadily.

2. Check that the transducer status indicator on the display shows a filled down ar­row.

1-3

1. OPERATIONAL OVERVIEW

1.3.2 How to raise the transducer

To raise the transducer, do the following:

1. Press the XDR up key ( ) to raise the transducer. The lamp above the key
blinks to indicate that the transducer is being raised. When the transducer is com-

pletely retracted, the lamp lights steadily.

2. Check that the transducer status indicator on the display shows a filled up arrow.

Note 1: If the automatic retraction feature is enabled, the system automatically raises
the transducer once the ship exceeds the pre-set speed. If speed data is not accurate,
the transducer may be raised at a different speed than the pre-set speed. For further
details regarding automatic retraction, see section 5.15.

Note 2: When the ship exceeds the speed set at [SPEED ALARM/MESSAGE] in the
[SYSTEM SETTING 2] menu, an audible alarm may sound. For further details see
section 5.15

1.4 How to Adjust the Brilliance

You can adjust the brilliance for the display and the key panel backlights.
To adjust the brilliance, do the following:

1. Press the brilliance key ( ). The [BRILLIANCE] dialog box appears.

Brill

Dimmer

2. Press W or X on the Cursorpad to adjust the screen brilliance. The setting range
is [0] to [9], default [9].

3. Press S or T on the Cursorpad to adjust the key panel brilliance. The setting
range is [0] to [4], default [4].

4. Press the MENU key to apply the settings and close the menu.

Note 1: The dialog box disappears automatically if there is no operation within a few
seconds.

Note 2: The brilliance for external monitors (other than the optional MU-150HD) can­not be adjusted from the control unit. Refer to the monitor’s manual for the correct pro­cedure.

: 9

: 4

1-4

Note 3: If the system is turned off with the brilliance at minimum setting, the screen

may appear blank when next turned on. In this case, press the brilliance key several
times to increase the brilliance.

1. OPERATIONAL OVERVIEW

1.5 How to Select a Display Mode

The CH-500/CH-600 has multiple display modes, all available at the push of a button.
The figure below shows examples of the display mode buttons and their use.

To select a display mode, press the appropriate button.

Key Display mode example Key Display mode example

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Horizontal Horizontal (zoomed)

PORT

STBD

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Echo Sounder (Fish finder)Vertical

A

(CH-500)

CSE SPD

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

(CH-500
only)

(CH-500
only)

Hoizontal + History

CSE SPD

177° 5. 2

PORT

6 0 6 0

Horizontal + Vertical

STBD

1 2 0

+

Choose

㻭

(CH-600)

A

Full-circle A-Scope + Horizontal

GAIN

(CH-500)

CSE

kn

+

Choose

㻭

(CH-600)

Full-circle A-Scope

SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Window Control. Used only with
Horizontal + Vertical & Horizontal +
History display modes. No use in
other modes.

1-5

1. OPERATIONAL OVERVIEW

A-SCOPE

Selecting a Display Mode (only for the CH-600)

The following displays are available with the dual-frequency transducer.

Key Display mode example Key Display mode example

x2

DUAL-FREQ HORIZONTAL

360°dual-freq. display of fish echoes,
etc. (Chapter 2)

2x

DUAL-FREQ. VERTICAL SCAN

Dual-freq. display of vertical section
of fish echoes. Useful for judging
depth and center position of fish
school. (Chapter 3)

NAV

DATA

NAV DATA

x2

DUAL-FREQ. HORIZ. EXPANSION
Expansion of dual-freq. horizontal

display. (Chapter 2)

NAV
DATA
or

2x

Depth/Temp. Display

A-SCOPE

DUAL-FREQ. ECHO SOUNDER

Dual-freq. display of fish echoes
below vessel. (Chapter 4)

NAV DATA

1-6

+

Choose

+

Choose

HORIZONTAL/HISTORY

The horizontal picture appears in
the main window; the history picture in
the sub window. Useful for showing
history of fish movement, distribution.

NAV

DATA

HORIZONTAL/VERTICAL ZOOM

The horizontal picture appears in
the main window; vertical zoom
picture in the sub window.

+

Choose

LF

HF

MIX

HORIZONTAL/VERTICAL SCAN

The horizontal picture appears in the
main window; the vertical fan picture
in the sub window.

Low frequency and high frequency
can be changed with this key.

The mix display compares echo
intensity between low and high
frequencies, and displays echoes
from tiny fish in discriminative colors.

1.6 How to Adjust the Gain

The GAIN knob adjusts the sensitivity of the receiver, which can hide noise and other
unwanted echoes. A high gain setting increases signal strength and can show exces­sive noise, as well as smaller, hard to detect echoes. A low gain setting eliminates
noise and gives a clearer picture, however smaller echoes may also be removed.

CAUTION

Adjust the gain properly.

Too little gain may present no picture.
Too much gain shows excessive noise on
the picture.

1. Operate the GAIN knob and the gain setting dialog box appears at the bottom of
the screen.

1. OPERATIONAL OVERVIEW

Gain 5.5 (0~10):

Rotate the gain knob to change value.

2. Turn the GAIN knob counter-clockwise to reduce the gain.
Turn the GAIN knob clockwise to increase the gain.

Note: If [Gain Setting Protect] in the [System Setting 2] menu is set to [ON] and the
GAIN knob is operated, the message "Press the gain knob to adjust the gain." ap-
pears. Press the GAIN knob, then adjust the gain as necessary.

1-7

1. OPERATIONAL OVERVIEW

1.7 How to Use the Menu

This section covers how to access the menu. For menu details, see chapter 5.

1. Press the MENU key. The menu window appears.

Menu
bar

Menu
items

Operational
guidance

2. Press S to select the menu bar.

3. Press W or X to select a menu.
The selected item is highlighted. The example figure above shows the [COM1]
menu and the menu title at the top of the screen is highlighted.

Menu

TX Power
TX Pulse length
TX Rate
Interference
AGC

Auto Filter
Reverberation
Volume

Note: The CH-600 can set [Interference], [AGC] and [Auto Filter] for LF

COM1 COM2

High
Long
1 0
Off
0

Std.

Off

0 . 0

: Select

and HF respectively.

: Change Menu: Apply

HOR. VERT ES

FUNC Key

System

4. Press T or S to move the cursor inside the menu and select a menu item.
The guidance box at the bottom of the screen shows a brief explanation for the
selected item and the operations allowed for the selected menu item.
The selected item is also highlighted in the same manner as described in step 3.

5. Press W or X to show the settings for the select menu item.

6. Press W or X to adjust or change the settings for the selected menu item.

7. To save and apply changes, press the MENU key.

Note: If you change a setting, then select a different menu item, the changes made to
the first menu item are saved.

1-8

1. OPERATIONAL OVERVIEW

1.8 Noise and Interference

Ultrasonic noise and interference can make it difficult to see the echoes you want to
see on the screen. Depending on the cause, your sonar can “adjust” the picture, either
by suppressing noise and interference, or by changing the transmission rate.

The following sections cover the more common causes of noise and interference.

1.8.1 Sea Surface Reflections (Horizontal Mode)

When a tilt is set at a low angle, sea surface reflections cover a large area of the dis­play, making it difficult to read.

To reduce sea surface reflections, set the tilt angle to 5° or higher so that the upper
edge of the sonar beam does not hit the surface, or adjust the TVG.

Tilt angle 0°

Tilt angle 5° to 7°

1.8.2 Wake Noise (Horizontal Mode)

The wake from own ship or other ships can cause “noise” which is shown as a dark
reflection on-screen, when the tilt is at a low angle. The wake appears as a thick, con­tinuous line and is easily distinguished from a fish school. However, because the air
bubbles in the wake attenuate the sound beam, it is often difficult to “see” beyond the
wake.

To avoid wake noise, wait until the wake has settled before checking the screen.

Own and other ship

Other ship

Own ship

Tilt: 0° to 5°

'

s screw noise

Own ship's
screw noise

Wake produced by
other ship

Own ship's screw noise

Own ship

Own ship's wake

1-9

1. OPERATIONAL OVERVIEW

Sidelobe echo

Range

1.8.3 Sidelobe Echo/False Echo (Horizontal Mode)

While the ultrasonic wave is emitted only in the direction set by the TILT control, some
emissions are directed outside the main beam. These are called sidelobes. The ener­gy of the sidelobe is weak in comparison to the main beam, but when the water is rel­atively shallow and the seabed is hard, strong echoes are detected by the sidelobes.
These “false” echoes appear on the display in a manner similar to that shown in the
figure below.

Sidelobe

Mainlobe

1.8.4 False Echo (Vertical Mode)

In shallow water (less than 100 m), unwanted echoes may appear. This phenomenon
is caused by false echoes from the previous transmission.

Reducing [TX Rate] on the [COM1] menu may lessen this effect.

Bottom

Fish
school

False echo

Sidelobe echo

Sidelobe echo

Range

Range

Mainlobe echo

1-10

1.8.5 Interference from other equipment

While observing the sonar picture, you may encounter occasional or intermittent noise
and interference. These are mostly caused by on-board electronic equipment, engine
or propeller noise, or electrical noise from other sonars being operated nearby.

Typical interference is displayed on-screen in a manner similar to the figure below.

You can suppress this kind of interference by using the interference rejector.
To use the interference rejector, do the following:

1. OPERATIONAL OVERVIEW

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [COM1].

4. Press T to select [Interference], then press X to show the [Interference] settings.

5. Press X to select [On]. The interference rejector is now active. The IR indicator
( ) is shown in the following location, depending on the display mode in use.

• All Horizontal modes: Top-right of the screen.

• Vertical and Echo Sounder modes: Top-left of the screen

6. Press the MENU key to close the menu and apply the changes.

To disable the interference rejector, repeat the above procedure and, at step 5, press
W to select [Off].

1.8.6 Interference from marine life

Marine life, such as plankton, can cause interference. The interference rejector can
suppress this type of interference.

To use the interference rejector, see section 1.8.5.

1-11

1. OPERATIONAL OVERVIEW

1.8.7 How to erase weak echoes

Weak echoes caused by interference from surface reflection and plankton can be
erased. This is particularly useful when you want to observe a school of fish clearly.

To erase weak echoes, do the following:

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [COM2].

4. Press T to select [Erase Color], then press X to show the [Erase Color] settings.
Depending on the setting for [Echo Colors] in the [COM2] menu, the number of
colors available to erase changes.

[Echo Colors] setting [Erase Color] range available

[32] Off (no echoes erased), 1 to 30
[16] Off (no echoes erased), 1 to 14

[8] Off (no echoes erased), 1 to 6

The default setting for all [Echo Colors] settings is [Off].

5. Press X to select the echo colors to erase. A higher settings erases stronger
echoes.
To color bar changes each time you press X, allowing to make sure only the col­ors you want to erase are removed.

Note: Use this function with caution. An excessively high setting can erase sea­bed echoes, which can lead to grounding and other safety problems.

6. Press the MENU key to close the menu and apply the changes.

1.9 How to Use the Cursor

Use the Cursorpad to move the cursor. The cursor indication shows information for the
location of the cursor at all times and appears at the top-left corner of the display.

Depending on the display mode the following information can be displayed at the top­left of the screen.

• Horizontal display mode: horizontal distance from own ship, depth and bearing.

• Vertical display mode: horizontal distance from own ship and depth.

• Echo sounder display mode: depth from own ship.

• Full-circle A-scope display mode: horizontal distance from own ship, depth and

bearing.

Note: When the cursor is placed on the own ship icon (center of the operational dis­play area), the indications show a value of 0.

1-12

1.10 How to Adjust the Range

The RANGE knob adjusts the range for echo detection and display on all display
modes. There are 15 preset ranges, for Horizontal, Vertical and Echo Sounder modes,
which can be changed to suit your needs.
The default preset range is the same for all modes, as shown in the table below.

CH-500

1. OPERATIONAL OVERVIEW

Range

setting

1 10401040104010401030
2 20802080208020802060
3 40 120 40 120 40 120 40 120 30 90
4 80 200 80 200 60 200 60 200 40 120
5 120 300 120 300 80 300 80 300 60 150
6 160 400 160 400 120 400 100 400 80 200
7 200 500 200 500 160 500 120 500 100 250
8 250 600 250 600 200 600 160 600 120 300

9 300 800 300 800 250 700 200 700 160 400
10 400 1000 400 1000 300 800 250 800 200 500
11 500 1500 500 1500 400 1000 300 1000 250 600
12 600 2000 600 2000 500 1500 400 1200 300 800
13 800 3000 800 3000 600 2000 500 1500 400 1000
14 1200 4000 1000 3500 800 2500 600 2000 500 1500
15 1600 5000 1200 4000 1000 3500 800 2500 600 2000

60 kHz 88 kHz 150 kHz 180 kHz 240 kHz

m ft m ft m ft m ft m ft

CH-600

Range setting

12050
2 40 100
3 60 200
4 80 300
5 100 400
6 120 500
7 160 600
8 200 700

9 250 800
10 300 1000
11 400 1200
12 500 1500
13 600 2000
14 800 3000
15 1200 4000

60/153 kHz, 85/215 kHz

mft

To increase the range, turn the RANGE knob clockwise.
To decrease the range, turn the RANGE knob counter-clockwise.

When the range is changed, the selected range is displayed at the top-center of the
screen for a few seconds. The indication at the top-right of the screen always shows
the currently selected range.
For normal use, the range should be set so that the seabed echo is at the bottom of
the screen.

1-13

1. OPERATIONAL OVERVIEW

Train center indication

Tilt angle

1.11 How to Use the Train Controls

The TRAIN knob selects the direction (bearing) in which the scan beam is output. The
actual beam changes depending on the display mode currently in use.

• Horizontal display mode: Select the center direction (bearing) for the scanning
beam.

• Vertical display mode: Select the bearing for the scanning beam.

• Echo sounder display mode: Select the direction for the sounding beam.

1.11.1 How to change the train direction

Typically, the train moves in a clockwise direction. On occasions where you want to
reconfirm echoes, you can reverse the train direction.

To reverse the train direction, press the REVERSE button ( ).
Each time the button is pressed, the indication "REVERSE" appears for approximately

three seconds at the top of the echo display area, and the train is reversed.

Note: The train reverse function is not available for Echo Sounder mode.

1.11.2 Train controls for horizontal mode

You can change the center direction, or bearing, for the horizontal scanning beam. If
you have a scanning sector set (see section 1.13), the center of the sector moves ac­cording to the train setting.

The train bearing moves in 6° steps and can be adjusted in the full 360° spectrum.

Train center indication

Tilt angle

Scanning beam

n

i

a

r

T

Horizontal scan with no sector setting

1-14

The train indicator (solid circle) moves to show the bearing graphically. The bearing
indication at the top-left of the screen shows the bearing in degrees.

To increase the bearing, turn the TRAIN knob clockwise.
To decrease the bearing, turn the TRAIN knob counter-clockwise.

1.11.3 Train controls for vertical mode

Train angle indication

Train direction indicator.
FORE: scanning in the fore direction.
STBD: scanning in the starboard direction.
AFT: scanning in the aft direction.
PORT: scanning in the port direction.

Train

Train angle indication

In Vertical display mode, the scanning beam “swings” in an arc, within the preset sec­tor (see section 1.13.2). The train control adjusts the bearing in which the scan beam
“swings.”

The train angle moves in 6° steps and can be adjusted in the full 360° spectrum.

Train angle indication

1. OPERATIONAL OVERVIEW

PORT

Train direction indicator.
FORE: scanning in the fore direction.
STBD: scanning in the starboard direction.
AFT: scanning in the aft direction.
PORT: scanning in the port direction.

STBD

The train angle indicator (solid circle) moves to show the starting direction of each
scan.

To increase the bearing, turn the TRAIN knob clockwise.
To decrease the bearing, turn the TRAIN knob counter-clockwise.

1.11.4 Train control for echo sounder mode

In Echo Sounder display mode, the scanning beam is sent in the direction set with the
TRAIN knob.

The train angle moves in 6° steps and can be adjusted in the full 360° spectrum.

Train

Vertical scan with no sector setting

Train angle indication

Train

To move the scanning beam clockwise (in relation to your ship), turn the TRAIN knob
clockwise.

To move the scanning beam counter-clockwise (in relation to your ship), turn the

TRAIN knob counter-clockwise.

1-15

1. OPERATIONAL OVERVIEW

1.12 How to Use the Tilt Controls

You can adjust the tilt angle with the TILT knob. Depending on the display mode in
use, the changing the tilt affects the echo differently.

The current tilt setting always appears at the top-center of the display, which gives you
a clear image of the angle for the scan beam.

Tilt angle indicator

1.12.1 Tilt control for horizontal modes

The tilt angle is the direction in which the ultrasonic wave is emitted. A tilt angle of 0°
is horizontal and an angle of 90° is vertical. You can change the tilt angle depending
on your needs by using the TILT knob.

When the tilt angle is changed, the selected angle appears at the top-center of the
screen for a few seconds. The selected angle is always visible at the top-right of the
echo screen.

1.12.2 Tilt control for vertical mode

The tile angle, in vertical mode, adjusts the angle for the beam center. A tilt angle of
0° is vertical and an angle of 90° is horizontal. You can change the tilt angle depending
on your needs by using the TILT knob.

When the tilt angle is changed, the selected angle appears at the top-center of the
screen for a few seconds. The selected angle is always visible at the top-right of the
echo screen.

1.12.3 Tilt control for echo sounder mode

You can point the transducer in any direction between the bottom of the ship (90°) and
to the front of the ship (0°).

1-16

To change the title angle, rotate the TILT control. The tilt is adjusted in 1° increments
and the selected angle appears at the top-center of the echo display area for a few
seconds.

1. OPERATIONAL OVERVIEW

Sector
width

1.13 How to Use the Sector Function

In some cases, you may want to restrict the scanning beam to a specific sector in re­lation to your ship. A sector is a “slice” of the full scanning range.

Depending on the display mode selected, the sector setting behaves in a different
manner.

1.13.1 How to set and use a sector with horizontal mode

In Horizontal display mode, the SECTOR knob selects a preset width for the horizon­tally scanned sector.

Sector
width

The setting range is 6° to 360° in 16 steps, as shown in the table below.

Preset

Sector

Width

To increase the width, turn the SECTOR knob clockwise.
To decrease the width, turn the SECTOR knob counter-clockwise.
You can also alternate between full-range scan and half-range scan with the FULL/

HALF SECTOR key .

The full-range scan shows 360° degree coverage around your ship and the half-range
scan shows a 168° area in the train direction (see section 1.11.2 for details on hori­zontal train).

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

6 24 48 72 96 120 144 168 192 216 240 264 288 312 336 360

(°)

1-17

1. OPERATIONAL OVERVIEW

1.13.2 How to set and use a sector with vertical mode

In Vertical display mode, the SECTOR knob selects a preset width for the vertically
scanned sector.

Sector width

The setting range is 6° to 180° in 16 steps, as shown in the table below.

Preset

Sector

Width

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

6 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180

(°)

To increase the width, turn the SECTOR knob clockwise.
To decrease the width, turn the SECTOR knob counter-clockwise.
You can also alternate between full-range scan and half-range scan with the FULL/

HALF SECTOR key .

The full-range scan shows 180° degree coverage around your ship and the half-range
scan shows a 84° area in the train direction (see section 1.11.3 for details on vertical
train).

1-18

1. OPERATIONAL OVERVIEW

Own ship indicator
moves in relation to the
sector center direction.

1.13.3 How to set a sector center (vertical mode only)

The scanned sector can be moved within the 180° scanning range, with the TILT
knob.

Sector center (TILT)

The tilt function’s setting range is 0° (starboard side of the ship) to 180° (port side of
the ship), in 6° increments.

Select the tilt setting which places the sector center at the middle of the detection
range.

Automatic shift for own ship

The tilt function automatically shifts your ship position on the screen, in relation to the
direction of the sector center.

PORT STBD

Own ship indicator
moves in relation to the
sector center direction.

The directional indications for [FORE], [AFT], [STBD] and [PORT] are hidden when
the own ship indicator is in that direction, as shown below.

• Sector center set between 0° and 60°: Own position shifted to port/aft, indication for
port/aft is hidden.

• Sector center set between 66° and 114°: Own position shifted to center, all direc­tional indications visible.

• Sector center between 120° and 180°: Own position shifted to fore/starboard, indi­cation for fore/starboard is hidden.

1-19

1. OPERATIONAL OVERVIEW

Event mark inscribed

Echo
display
area

1.14 How to Use the Event Marker

The event marker function marks important locations on the display, and up to five
markers may be inscribed. This function requires connection to speed and positions
sensors. When [TLL Output] is set to [ON], the CH-600 outputs event mark information
to the external navigational equipment such as a gyrocompass, a GPS receiver and

so on. Press key to output own ship information from NMEA2000 port.
The procedure to inscribe an event mark is the same for all display modes.

1.14.1 How to inscribe an event mark

To inscribe an event mark, move the cursor to the location to mark, then press the
EVENT key .

Each time the EVENT key is pressed, the latest event mark icon ( ) appears at the cur­sor location. All previous marks are displayed with the previous event mark icon ( ).

Event mark inscribed

When the capacity for event marks is reached, the oldest mark is erased to make room
for the newest mark.

Note 1: For Horizontal and Full-circle A-scope display modes, the range and bearing
for the latest event mark is displayed at the bottom-left of the screen.

Note 2: Where Horizontal + Cross-Section display mode is in use, event marks can
only be inscribed in the main window.

1.14.2 How to delete event marks

To delete all event markers, do the following:

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

1-20

1. Move the cursor outside the echo display area.

2. Press the EVENT key. All event marks are re-
moved from the display.

Echo

CSE

display

SPD

area

GAIN

TVG LEVEL

DISTANCE

COLOR

1. OPERATIONAL OVERVIEW

Range ring
shown as a
dashed line

Bearing line
shown as a
dashed line

Train indication
shows horizontal
range and depth
as a dashed line.

Cursor location
indication shows
horizontal range,
depth and bearing to
cursor location.

Note 1: If a function key is set as a short-cut key for [DELETE MARK], you can also
use the assigned function key to delete the event marks.

Note 2: Event markers cannot be deleted individually.

1.15 How to Use the Range/Bearing Marker

The range and bearing marker function is used to measure the range (distance) and
bearing from your ship to a specified location on the display, such a fish school or a
reef.

The range marker behaves differently depending on the display mode in use. See the
following display examples for details.

To show an range mark, press the RANGE key . The range mark moves with
the cursor. Move the cursor to the location to be measured.

Depending on the display mode in use, the range mark is displayed in a different man­ner, and measurements also differ.

Horizontal display mode

The cursor location indicator shows the range (horizontal), depth and bearing to the
cursor location. The train indication also shows the range (horizontal) and range to the
cursor as a dashed line.

The range ring and bearing line move with the cursor.

Cursor location
indication shows
horizontal range,
depth and bearing to
cursor location.

Bearing line
shown as a
dashed line

Range ring
shown as a
dashed line

Train indication
shows horizontal
range and depth
as a dashed line.

GAIN

TVG LEVEL

DISTANCE

CSE
SPD

COLOR

1-21

1. OPERATIONAL OVERVIEW

Range ring
shown as a
dashed line

Cursor location
indicator shows
horizontal range,
depth and bearing
to cursor location

Train indication
shows horizontal
range and depth
as a dashed line

Bearing line
shown as a
dashed line

Cursor location
indication shows
horizontal range
and depth to
cursor location

Depth mark
shown as a
horiztontal
dashed line

Range and depth displayed
numerically at cursor position

Range mark shown as
a vertical dashed line

Cursor location indication
shows range to cursor
location.

Depth range to marker displayed
numerically. Indication moves with the
range line.

Train indication shows
depth as a dashed line.

Full-circle A-Scope display mode

Cursor location
indicator shows
horizontal range,
depth and bearing
to cursor location

Vertical display mode

Cursor location
indication shows

PORT

horizontal range
and depth to
cursor location

Bearing line
shown as a
dashed line

Range ring
shown as a
dashed line

STBD

Train indication
shows horizontal
range and depth
as a dashed line

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

CSE
SPD

Echo sounder display mode

Range and depth displayed
numerically at cursor position

Range mark shown as
a vertical dashed line

Cursor location indication
shows range to cursor
location.

Depth range to marker displayed
numerically. Indication moves with the
range line.

Depth mark
shown as a
horiztontal
dashed line

GAIN

TVG LEVEL

DISTANCE

COLOR

Train indication shows
depth as a dashed line.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

1-22

1. OPERATIONAL OVERVIEW

1.16 How to Use the Tracking Function

The Tracking button ( ) allows you to track a fixed position, a fish school or re­scan an area in reverse.

There are three types of tracking methods available.

• [Position]: Tracks a stationary position (for example, a reef) using position data from
a navigator. This tracking type is available for Horizontal, Horizontal (zoomed) and
Full-circle A-Scope modes only.

• [Echo]: Tracks fish echoes either manually, or automatically. This tracking type is
available for Horizontal mode only. This is the default setting.

• [Reverse]: Reverses the train direction manually. This tracking mode is available for
all Horizontal modes. In Vertical mode, this function works the same as the Train re­verse function (see section 1.11.1).

Note 1: The tracking function is not available for Echo Sounder mode.
Note 2: [Position] and [Echo] tracking are not available for Vertical mode. If Vertical

mode is active and the tracking method is set to either [Position] or [Echo], the method
is automatically changed to [Reverse] for Vertical mode.

1.16.1 How to select the tracking method

To select the tracking method to use, do the following:

1. Press the MENU key to open the menu.

2. Press X or W to select [HOR.].

3. Press T to select [Tracking Key], then press X to show the [Tracking Key] set-
tings.

4. Press X or W to select [Position], [Echo] or [Reverse], as appropriate. The default
setting is [Echo].

5. Press the MENU key to close the menu and apply the changes.

1.16.2 Position tracking function

The position tracking function requires position data input from a navigator. This track­ing method is available for all Horizontal modes.

1. Referring to section 1.16.1, set the tracking method to [Position].

2. Place the cursor at the location to track, then press the Tracking button. The sys­tem now tracks the selected location.

Note 1: When Position tracking is in use, the following controls are disabled.

• Tilt • Sector • Train • Range

If one of the disabled controls is operated, the notification "Target tracking on. Stop
tracking." appears.

Note 2: If the Tracking key is pressed and no data is input from a navigator, the no­tification "No position data." appears.

Note 3: When position tracking is active, the scan sector is fixed at 48° width in the
direction of the tracked position.

To stop position tracking, press the Tracking key again.

1-23

1. OPERATIONAL OVERVIEW

Inner boundary

Outer boundary

Tracking indicator.

Flashes when a school/fish
is detected while tracking
mode is active.

1.16.3 Echo tracking function

The echo tracking function can be set to tracks fish echoes either automatically or
manually.

How to setup echo tracking

1. Referring to section 1.16.1, set the tracking method to [Echo].

2. At the [HOR.] menu, press T to select [Tracking Mode], then press X. The [Track­ing Mode] settings appear.

3. Select [Auto] or [Manual], as appropriate.

4. Press the MENU key to close the menu and apply the changes.

How to use automatic echo tracking

1. Confirm that the [Tracking Mode] is set to Auto, then press the Tracking key. The
detection area setup window appears.

Inner boundary

Set detection area.

◄►: Inner

▲▼: Outer

Outer boundary

Tracking indicator.
Flashes when a school/fish
is detected while tracking
mode is active.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

2. Press W or X to adjust the inner boundary area.

3. Press S or T to adjust the outer boundary area.

Fish detected between the inner boundary and outer boundary are tracked automati­cally. When fish are detected, the system release a notification sound, the tracking in­dicator flashes and the train direction changes to rescan the area. The area is “re­painted” where the echoes were detected.

1-24

The detection area is affected by both sector and
train direction settings. In the example to the right, a
scan sector with a width of 192°is set with the train
direction set to 180° (in the FORE direction).

1. OPERATIONAL OVERVIEW

1.16.4 Reverse tracking function (Horizontal mode only)

You can manually change the train direction at any time. This allows you to re-check
an area that was recently swept. This tracking method is available for all Horizontal
modes and the Vertical mode.

1. Referring to section 1.16.1, set the tracking method to [Reverse].

2. To reverse the train direction, press the Tracking button. The train now moves in
reverse.

Each time the button is pressed, the indication "REVERSE" appears for approximately
three seconds at the top of the echo display area, and the train is reversed.

Note: You can also change the train direction with the REVERSE button ( ).

1-25

1. OPERATIONAL OVERVIEW

This page is intentionally left blank.

1-26

2. HORIZONTAL MODE

2.1 Operational Overview

The Horizontal Scan displays a broad view of the waters beneath and around your
vessel.

For CH-500

Five types of Horizontal display mode are available.

Number Display mode

1 Full-circle A-Scope, Horizontal + Full-circle.
2 Horizontal + History.
3 Horizontal + Vertical.
4 Horizontal.
5 Horizontal (zoomed).

Depending on your requirements, select the appropriate Horizontal display mode.

For CH-600

Three types of Horizontal display mode available.

LF

HF

Number Display mode

1 Combination key
2 Swiching the Frequency (LF or HF)
3 Mix Display
4 Horizontal.
5 Horizontal (zoomed).

MIX

2-1

2. HORIZONTAL MODE

2.2 Horizontal Menu Overview

The [HOR.] (Horizontal) menu contains the settings and adjustments for Horizontal
mode.

To access the [HOR.] menu, do the following:

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [HOR.]. The Horizontal menu appears.

Menu
TVG Level

TVG Distance
Gain ADJ.
RES. Color
Clutter
Tracking Key
Tracking Mode
Auto Tilt
A-Scope

Note: The CH-600 can set [TVG Level], [TVG Distance], [Gain ADJ.],

COM1 COM2

4. 0

4. 0
0
LOG
0
Echo
Auto
Off
Off

: Select

[RES. Color] and [Clutter] for LF or HF respectively.

: Change Menu: Apply

HOR. VERT ES

FUNC Key

System

The table below lists the menu items with a brief explanation, along with the settings
and ranges available.

Menu item Description Settings/Ranges

[TVG Level] Time Varied Gain. Compensates for

0.0 to 10.0; default: 4.0
propagation loss of sound in water. See
section 2.13.3.

[TVG Distance] Time Varied Gain. Compensates for

0.0 to 10.0; default: 4.0
propagation loss of sound in water. See
section 2.13.3.

[Gain ADJ.] Adjust the level of gain. -10 to +10; default: 0
[RES. Color] Sets the color scheme for echo display,

based on echo strength.

LOG, Linear, Square, Cube; default:
LOG

• LOG: Weak to strong echoes are dis-

played in colors respective to their
echo strength.

• Linear: Downplays weak echoes,

compared to LOG. Effective for sup­pressing weak echoes such as plank­ton.

• Square: Strong echoes are empha-

sized more than in Linear.

• Cube: Strong echoes are emphasized

even more than in Square.

[Clutter] Suppresses low intensity echoes, such

0, 1, 2, 3; default: 0
as sediment. The higher the number
(setting) the weaker the echoes which
are erased.

2-2

2. HORIZONTAL MODE

Menu item Description Settings/Ranges

[Tracking Key] Set the function for the tracking key. See

section 1.16.1.

[Tracking Mode] Selects the tracking mode for [Echo]

tracking. See section 1.16.3.

[Auto Tilt] Enables/disables automatic tilt and tilt

angle. For example, if the tilt is set to 30°
and [Auto Tilt] is set to 4°, the tile chang­es as follows:
30°o26°o30°o34°o30°...

[A-Scope] Enables/disables the A-Scope for Hori-

zontal mode.

Position, Echo, Reverse; default: Echo

Auto, Manual; default: Auto

Off, ±2°, ±4°, ±6°, ±10°; default: Off

Off, On; default: Off

2.3 Mix Display (CH-600 only)

The mix display compares echo intensity between low and high frequencies, and dis­plays echoes from tiny fish in discriminative colors. This is done by utilizing the fact
that tiny fish return a stronger echo against a high frequency rather than a low frequen­cy. The equipment accomplishes this as follows:

• If a high frequency echo is stronger than the corresponding echo on the low fre-

• If the low frequency echo is stronger than or equal to the high frequency echo, it is

In other words, the echoes displayed in orange through light-blue may be considered
to be tiny fish such as whitebait. When the mix display is active the indication MX ap­pears at the top of the display.

High-frequency
display

quency, the high frequency echo is displayed.

less likely to be a tiny fish and therefore is displayed in blue.

Mix
display

How the mix display works

To use the mix display effectively, it is important that the gain for both the low and high­frequencies is set properly. When searching for young fish such as whitebait, follow
the procedure below. For detailed information about gain adjustment, see the next
section.

2-3

2. HORIZONTAL MODE

1. Press the MIX key to activate the mix mode. How to display the mix display de­pends on the display mode in use.

2. Adjust the high-frequency gain while observing targeted fish.

3. While observing the mix display, set the low-frequency gain to 0 and gradually
raise it just until echoes from adult fish disappear from the mix display.

4. While observing the echoes from young fish on the mix display, readjust the low­frequency gain in order to distinguish young fish. When the echoes from young
fish are weak, lower the low-frequency gain. If adult fish appear, raise the low-fre­quency gain. (Rule of thumb: For whitebait, low-frequency gain is set 3-4 steps
lower than high-frequency gain.)

Single-frequency display or combination display (other than vertical scan com­bination): Use the MIX key to switch between the mix display and the single-frequen-

cy display alternately.
Dual-frequency display: Use the MIX key to switch between the mix display and the

dual-frequency display alternately.

LOW-FREQ.

DISPLAY

HIGH-FREQ.

DISPLAY

MIX key

HIGH-FREQ.

DISPLAY

MIX

DISPLAY

How the MIX key works in dual-frequency mode

Combination display (vertical scan combination)

Main window is active: The MIX key changes the frequency of the main window from
low to high alternately.

Sub window is active: The MIX key changes the frequency of the sub window from low
to high alternately.
To switch between main and sub windows use the MAIN/SUB key.

2-4

2.4 Typical Horizontal Mode

The Horizontal mode scans a 360° area below the ship, which makes it useful for gen­eral searches.

To view this display mode, press .

2. HORIZONTAL MODE

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Number Description

1 Indications for cursor position. (Horizontal distance, depth and bearing.)
2 Indications for range and tilt.
3 Indications for tilt angle, interference rejection, target lock and transducer

raise/lower status.

4 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

5 Navigational data. (Heading, speed, depth, water temperature, tidal current

information.)
Note: Requires connection to appropriate sensors.

6 Echo display settings. (Gain, TVG level, distance.)
7 Horizontal scan echo display area.

You can also customize this display to show the A-Scope readings in the data display
section at the right-side of the screen.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Typical Horizontal mode A-Scope enabled (hatched area)

In the above example, figure 1 shows a typical Horizontal mode display.Figure 2
shows the Horizontal mode with A-Scope (shown in the bottom-right of the screen ex­ample) enabled.

2-5

2. HORIZONTAL MODE

To activate the A-Scope display in Horizontal mode, do the following:

1. Referring to section 2.2, access the [HOR.] menu.

2. Press T to select [A-Scope], then press X to show the [A-Scope] settings.

3. Press X or W to select the appropriate setting.

Select [Yes] to show the A-Scope, or select [No] to hide the A-Scope.

4. Press the MENU key to close the menu.

2.5 Full-circle A-Scope Mode

Full-circle A-scope mode shows a 360° view of echoes at each transmission with am­plitudes and tone proportional to their intensities. This makes it useful for estimating
the kind of fish school and seabed composition.

When using the CH-500, press to view this display mode.

When using the CH-600, press and select Full A-Scope to view this dis-

㻭

play mode.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Number Description

1 Indications for cursor position. (Horizontal distance, depth and bearing.)
2 Indications for range and tilt.
3 Indications for tilt angle, interference rejection, target lock and transducer

raise/lower status.

4 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

2-6

5 Navigational data.(Heading, speed, depth, water temperature, tidal current

information.)
Note: Requires connection to appropriate sensors.

6 Echo display settings. (Gain, TVG level, distance.)
7 Full-circle A-Scope echo display area.

2. HORIZONTAL MODE

When Full-circle A-Scope mode is active, you can toggle the display between Full-cir­cle A-Scope only and a “dual” display which show both the Full-circle A-Scope and the
horizontal scan echoes.

By using the Horizontal + Full-circle A-Scope, you can compare the two displays and
better estimate the density and distribution of fish schools.

To toggle the display, press . The display switches between Full-circle A-Scope
only and the “dual” display with each press of the button.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

GAIN

In the above example, figure 1 shows the Full-circle A-Scope display. Figure 2 shows
the Horizontal + Full-circle A-Scope mode display.

When using the CH-600, press and select [HOR./Full A-Scope].

2.6 Horizontal Mode (Zoomed)

Fish echoes may be enlarged by 1.5 times by using the Horizontal (zoomed) mode.

To view this display mode, press .

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Depending on the training direction when this display mode is activated, the train cen­ter is automatically moved as shown in the table below.

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

Training direction Position after zoom is enabled Remarks

318° to 42° Bottom of screen (Example figure 1) For viewing forward.

48° to 132° Left side of screen For viewing starboard side.
138° to 222° Top of screen For viewing aft.
228° to 312° Right side of screen (Example figure 2) For viewing port side.

2-7

2. HORIZONTAL MODE

2.7 Horizontal + History Mode

The Horizontal + History mode shows both the Horizontal scan echoes and a view of
the past horizontal scan echoes on one screen. This mode is best used to estimate
the size and distribution of schools.

When using the CH-500, press to view this display mode.

When using the CH-600, press and select HOR./Full A-Scope to view

㻭

this display mode.

CSE SPD

Number Description

1 Indications for cursor position. (Horizontal distance, depth and bearing.)
2 Indications for range and tilt.
3 Indications for tilt angle, interference rejection, target lock and transducer

raise/lower status.

4 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

5 Navigational data.(Heading and speed.)

Note: Requires connection to appropriate sensors.

6 History display area.
7 Horizontal scan echo display area.

2-8

2.8 Horizontal + Vertical Mode

With the Horizontal + Vertical display mode you can show both horizontal and vertical
echoes in one of two manners.

The default display mode shows both a horizontal (360° around the ship) view in the
main section of the display and a vertical (cross-section) scan of the waters below the
ship at the bottom-right of the screen.

The split-screen display shows the horizontal (180° in the train direction) view at the
top half of the screen and a vertical (cross-section) scan of the waters below the ship
at the bottom half of the screen.

This mode is best used to estimate the size, location in relation to the seabed and dis­tribution of schools which are both below and around the ship.

The split display also gives you a better idea of where your net is in relation to the boat.

When using the CH-500, press to view this display mode.

Default Horizontal + Vertical Split Horizontal + Vertical

2. HORIZONTAL MODE

CSE SPD

177° 5. 2

PORT

6 0 6 0

STBD

1 2 0

kn

PORT

6 0 6 0

STBD

1 2 0

Number Description

1 Indications for cursor position. (Horizontal distance, depth and bearing.)
2 Indications for range and tilt.
3 Indications for tilt angle, interference rejection, target lock and transducer

raise/lower status.

4 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

5 Navigational data.(Heading, speed, depth, water temperature, tidal current

information.)
Note: Requires connection to appropriate sensors.

6 Scan direction (PORT, STBD, FORE, AFT).
7 Vertical scan echo display. (Sub window)
8 Horizontal scan echo display area. (Main window)

How to use the window control button

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

The window control button switches control of the main (Horizontal scan) and the sub
(vertical scan) windows. The displays are independent of each other, so you can adjust
them as desired.

Press to switch window control of the main and sub windows.
Where the sub window is selected, the sub window is highlighted in red and the mes-

sage "Sub window controllable." appears.
Where the main window is selected, the message "Main window controllable." appears.

2-9

2. HORIZONTAL MODE

2.9 How to Choose a Frequency (CH-600 only)

2.9.1 Choosing the frequency

You may choose low frequency or high frequency, with the LF/HF key. The display
shows HI or LO at the top of the screen depending on your selection. Use the table
below to determine which frequency to use.

Item Low frequency High frequency

Detection range Longer range comparing with the

high frequency. Attenuation loss
is small on low frequency.

Detection depth Deeper than the high frequency.

Bottom echo is prominent be­cause of wide beam width so fish
echoes are hidden.

Detection range
(detection “leaks”)

Detection of bottom fish Fish echo and bottom echo over-

Detection of bait fish Not suited for this purpose.

Affected by air bubbles
from other vessels

Detection area is wide (beam
width is wide).

lap.
(Wide beam width)

(Bait fish are not easily detected
with low frequency.)

Low frequency is easily interfered
by cavitation from other vessels.

The dual-frequency display is useful for comparing the picture from one frequency
against the other to overcome deficiencies in both. Use the single-frequency for ob­jective-specific fishing.

Shorter range comparing with the low
frequency. Attenuation loss is great
on high frequency.

Shallower than the low frequency.
Bottom echo is less prominent be­cause of narrow beam width so fish
echoes are easy to find.

Detection area is narrow (beam width
is narrow).

Fish echo and bottom echo are dis­played separately.
(Narrow beam width)

Well suited for this purpose.
(Bait fish are more easily detected
with high frequency.)

High frequency is not easily interfered
by cavitation from other vessels.

High frequency

Low frequency

Frequency selection and mode

Single-frequency display or combination display (other than vertical scan com­bination): The LF/HF key chooses low frequency or high frequency alternately.

Dual-frequency display (mix mode OFF): The LF/HF key switches the frequency of

the high-and low-frequency displays alternately.
Dual-frequency display (mix mode ON): The LF/HF key changes the frequency of

the left-hand display* (top display in dual-frequency vertical scan display) from low to
high alternately.

* Dual-frequency horizontal display, Dual-frequency horizontal expansion display,
Dual-frequency echo sounder display.

2-10

2. HORIZONTAL MODE

LOW-FREQ.

DISPLAY

MIX

DISPLAY

LF/HF key

Frequency switching in dual-frequency combination display, mix display ON

Combination display (vertical scan combination):
Main window is active: The LF/HF key changes the frequency of the main window
from low to high alternately.

Sub window is active: The LF/HF key changes the frequency of the sub window from
low to high alternately.

To switch between main and sub windows use the MAIN/SUB key.

2.9.2 Choosing the combination display

On the CH-600, the combination display can be selected from the following five types.

1. HOR./HISTORY

2. HOR./VERT

3. HOR./VERT ZOOM

4. Full A-Scope

5. HOR./Full A-Scope

HIGH-FREQ.

DISPLAY

MIX

DISPLAY

The key control differs because switching the dual-frequency is available on the CH-

600.

Choosing the combination display

1. Press key on the “DISPLAY MODE” key selection of the control unit.
Combination selection window appears for four seconds.

Note: The selection window shows the combination display set as “ON” in the
“System Setting 3” menu.

HOR./HISTORY

HOR./VERT

HOR./VERT ZOOM

Full A-Scope

HOR./Full A-Scope

2. Press T or S to select the required display.
Or you can select the required display by pressing key repeatedly.

3. Press MENU key to close the combination selection window.
The window will automatically closes when no key was operated for four seconds.

2-11

2. HORIZONTAL MODE

Tilt angle (θ)

Sounding beam

Note 1: When only one of the combination display is set as “On”, combination se­lection window does not appear. The selected combination will directly appear.

Note 2: When all of the selection are set as “Off” in the “System Setting 3” menu,
“HOR./VERT” will directly appear.

2.10 How to Interpret the Horizontal Display

The wide sounding beam is emitted from the soundome at a certain tilt angle (see
hatched area in the figure below).

At the default setting, the information (target echoes) obtained by this beam is dis­played in sectors at 6° increments on the screen. Thus, all directions around the boat
are sounded in 60 transmissions.

The train speed can be adjusted to suit your needs (see section 2.11).

Soundome

Tilt angle (θ)

Tilt angle (θ)

Sounding beam

n

i

a

r

T

Normal train speed takes a “picture” at 6° intervals.

Each “dot” on the outer ring of
the horizontal display indicates
6°. In this example, the scans
are done at 12° intervals.

How the Horizontal mode picture is displayed on the screen

The appearance of echoes on the screen varies, depending on factors such as trans­mission frequency, gain and TVG settings, seabed composition and contours.

2-12

2. HORIZONTAL MODE

The deeper
bottom echo is
displayed in a
weak color and
with a long tail.

Bottom echoes

When the tilt angle is changed, the seabed echo appears on-screen in the manner
shown below. When the tilt is decreased, the bottom trace become weaker. By observ­ing the seabed condition on the display, you can prevent damage to your nets.

(A) Flat seabed
Tilt angle: 10° to 15°

Narrow tilt angle

Only half of
vertical beam
width captures
the bottom.

(B) Flat seabed
Tilt angle: 20° or more

(C) Sloping seabed
Tilt angle: 20° or more

Bottom echo

displayed narrower
and in stronger
colors when
compared to (A).

Bottom echo

Shallow bottom
is displayed in a
strong color and
with a short tail.

The deeper

The deeper
bottom echo is

bottom echo is
displayed in a

displayed in a
weak color and

weak color and
with a long tail.

with a long tail.

2-13

2. HORIZONTAL MODE

School of fish

Fish schools

Fish schools appear as a mass of echoes on the screen. The color of the mass indi­cates the school density. To find the distribution and center of a school, try using dif­ferent tilt angles.

(A) Sea surface fish
Tilt angle: 0° to 10°

School of fish

Large midwater,
a school of fish
is present.

Sea surface
reflections

(B) Midwater/bottom fish
Tilt angle: 30° or more

(B) Midwater/bottom fish
Tilt angle: 0° to 20°

School of fish
Large midwater,
a school of fish
is present.

Bottom

Fish echoes which appear together with,
or after, the seabed can be detected.

School of fish

School of fish

Bottom

2-14

When the tilt angle is shallow, the reflection echo from the seabed is weaker. This
makes the fish echoes from the seabed easier to find.

2.11 How to Select the Training Speed

The training speed is the increments at which sounding beam is transmitted in one full
circle (360°). Depending on your needs, you may want to change the speed.

A high speed (lower increments) displays the echoes in a “rough” manner, but is better
for tracking fast moving objects, such as a particular school of fish. A low speed (high­er increments) display smoother echoes, but fast moving objects may not be detected.

The default training speed is 6°.

To change the training speed at any time, press the Train Speed button ( ).
With each press of the button, the train speed cycles through speeds in the following

order: 6°, 12°, 15°, 18°, 21°, 24°, 6°...
You can disable one or more of the train speed presets, depending on your needs.

See section 5.8.

2. HORIZONTAL MODE

2.12 How to Use the Vertical Search Feature

When a school of fish is detected by the horizontal scan, it may be difficult to estimate
the distance of the school from the seabed, or the distribution of fish within the school.
Unlike the fan-shaped beam used in Vertical mode, the [VERT. Search] feature “fo­cuses” on the selected area and instantly changes the display mode to allow you a
clearer view of the school location in relation to the seabed and your ship.

This feature requires a function key set as the [VERT. Search] short-cut key. In the
following procedure, the default setting (key 1) is used. To set up short-cut keys, see
section 5.6.2.

1. Set the system to one of the Horizontal modes outlined in this chapter.

2. When a fish or school echo is detected, press the 1 function key. The display au­tomatically switches to the Vertical mode to search for the echo.

3. Adjust tilt and train to find the fish or school echo again.

4. When the echo appears on the screen again, place the cursor on the echo and
read the depth/range indications at the top of the screen.

5. To return to the display mode used before activating the Vertical Search, press
the 1 key again.

2-15

2. HORIZONTAL MODE

2.13 How to Adjust the Picture

2.13.1 How to suppress seabed/surface reflections with TX power

In shallow fishing grounds, excessive sea surface and bottom reflections often inter­fere with wanted fish echoes and they cannot be eliminated sufficiently with the TVG
controls. In such cases, try to reduce the output power, without turning down the gain.
The picture becomes clearer when output power is reduces rather than when the gain
is decreased.

TX OUTPUT POWER: HIGH TX OUTPUT POWER: LOW

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [COM1].

4. Press T to select [TX Power], then press X to show the [TX Power] settings.

5. Press X to select [Low].
For long-range detection, this setting should be set to [High].

6. Press the MENU key to close the menu and apply the changes.

2.13.2 How to suppress bottom tail with pulselength

Fish schools near the bottom are sometimes difficult to detect because you have to
discriminate fish echoes from the seabed reflections. To help discriminate fish echoes
near the seabed, use a short pulselength to decrease the tail from seabed reflections.

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [COM1].

4. Press T to select [TX Pulselength], then press X to show the [TX Pulselength]

settings.

2-16

5. Press X to select [Short].

6. Press the MENU key to close the menu and apply the changes.

2.13.3 How to display weak echoes clearly with TVG

Echoes from targets (such as the bottom or a fish) return to the transducer in order of
the distance to them, and when their intensities are compared at the transducer face,
those from nearer targets are generally stronger when their reflecting properties are
nearly equal.

If these echoes are displayed directly on the screen, the size of the displayed echo
from the same school of fish may change with distance, making it difficult to judge the
actual size of the school of fish.

To overcome this inconvenience, use the TVG function. It compensates for propaga­tion loss of sound in water: amplification of echoes on short range is suppressed and
gradually increased as range increases, so that similar targets are displayed in similar
intensities irrespective of the ranges to them.

The TVG also functions to suppress unwanted echoes and noise which appears in a
certain range area on the screen.

2. HORIZONTAL MODE

With a proper TVG setting

Equal sized
echoes are
presented with
the same size
and color.

Noise is
reduced.

Noise caused by
strong reflection of
surface turbulence.

Without TVG

Nearer target
echoes appear
in larger size.

Reduce gain for
nearby areas with
the TVG function.

Note: Use this function with caution, excessive TVG may eliminate short-range
echoes.

How to adjust the TVG

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [HOR.].

4. To reduce reflections from the sea surface or plankton, press T to select [TVG
Level] ([TVG Level-LF]/[TVG Level-HF] on CH-600), then press X to show the
[TVG Level] settings.

TVG Level

4. 0

Gain

Hi

Lo

200m

2-17

2. HORIZONTAL MODE

5. Press X or W to adjust the TVG level. Ideally, a setting between 2.0 and 5.0
should be sufficient. A larger setting reduces the gain over distance.
As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

TVG Level
indication
changes to
show the
new setting.

Current setting

New setting

Gain

Hi

Lo

TVG Level

200m

4. 0

6. Press T to select [TVG Distance] ([TVG Distance-LF]/[TVG Distance-HF] on CH-

600), then press X to show the [TVG Distance] settings.

TVG Distance

Gain

Hi

Lo

200m

4. 0

7. Press X or W to adjust the TVG level.
Ideally a setting between 3.0 and 5.0 (130 m to 320 m) is sufficient.
As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

6. 0TVG Distance

Gain

Current setting

New setting

Hi

Lo

320m

Indications for
distance setting
and actual distance
change to show the
new setting.

2-18

2. HORIZONTAL MODE

The preset distance, in order of [TVG Distance] setting, is as shown in the table
below.

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

Hiro (HR)

Passi/braza (pb)

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

Hiro (HR)

Passi/braza (pb)

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

3 8 20 40 60 100 130 160 200 250

10 30 70 130 210 330 410 520 660 820

2 5 10 20 40 60 80 100 110 140

2 5 10 20 40 60 80 100 130 170

2 5 10 20 40 60 80 100 120 150

5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0

360 400 450 500 560 630 710 790 890 1000

1160 1300 1470 1640 1840 2070 2320 2600 2920 3280

200 220 250 280 300 340 390 430 490 550

230 260 300 330 370 420 470 520 590 660

210 240 270 300 340 380 430 480 540 600

TVG Distance setting

TVG Distance setting

8. Press the MENU key to close the menu and apply the changes.

320

1040

170

210

180

2-19

2. HORIZONTAL MODE

This page is intentionally left blank.

2-20

3. VERTICAL SCAN MODE

3.1 Vertical Mode

The Vertical display mode shows a “cross-section” of the water below and around the
ship by using a “fan-shaped” beam. This mode is useful when you want to view a sec­tor below and around your ship.

To view this display mode, press .

PORT

Number Description

1 Indications for cursor position. (Horizontal distance, depth and bearing.)
2 Indications for range and tilt.
3 Indications for transducer raise/lower status.
4 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

STBD

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

5 Navigational data.(Heading, speed, depth, water temperature, tidal current

information.)
Note: Requires connection to appropriate sensors.

6 Echo display settings. (Gain, TVG level, distance.)
7 Vertical scan echo display area.
8 Indications for scan direction and train bearing.

3-1

3. VERTICAL SCAN MODE

3.2 Vertical Menu Overview

The [VERT] (Vertical) menu contains the settings and adjustments for Vertical scan
mode.

To access the VERT menu, do the following:

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [VERT].
The Vertical menu appears.

Menu
TVG Level

TVG Distance
Gain ADJ.
RES. Color
Clutter
HOR. Range

Note: The CH-600 can set [TVG Level], [TVG Distance], [Gain ADJ.],

COM1 COM2

4. 0

4. 0
0
LOG
0
X 1

: Select

[RES. Color] and [Clutter] for LF or HF respectively.

: Change Menu: Apply

HOR. VERT ES

FUNC Key

System

The table below lists the menu items with a brief explanation, along with the settings
and ranges available.

Menu item Description Settings/Ranges

[TVG Level] Time Varied Gain. Compensates for propagation loss of

0.0 to 10.0; default: 4.0

sound in water. See section 2.13.3.

[TVG Distance] Time Varied Gain. Compensates for propagation loss of

0.0 to 10.0; default: 4.0

sound in water. See section 2.13.3.
[Gain ADJ.] Adjust the level of gain. -10 to +10; default: 0
[RES. Color] Sets the color scheme for echo display, based on echo

strength.

LOG, Linear, Square,
Cube; default: LOG

• LOG: Weak to strong echoes are displayed in colors
respective to their echo strength.

• Linear: Downplays weak echoes, compared to LOG.
Effective for suppressing weak echoes such as
plankton.

• Square: Strong echoes are emphasized more than in
Linear.

• Cube: Strong echoes are emphasized even more
than in Square.

[Clutter] Suppresses low intensity echoes, such as sediment.

0, 1, 2, 3; default: 0
The higher the number (setting) the weaker the echoes
which are erased.

[HOR. Range] Sets the horizontal range expansion factor for horizontal

u1, u2; default: u1
scan mode.
Note: This feature is not adjustable when the target lock
function or vertical search function is active.

3-2

3. VERTICAL SCAN MODE

Fish school

Fish school

Seabed

OS position
indicator

Fish school

Seabed

Fish school

Seabed

3.3 How to Interpret the Vertical Scan Display

The sound beam is emitted in a vertical half-circle, which forms a sounding area sim­ilar to a slice of watermelon. This gives the user a better view of the underwater con­ditions. The bearing of the vertical sounding beam can be selected manually or
automatically.

Sounding beam’s bearing

Bow

Scanned area
(shaded)

Port-starboard scan (seabed)

Fish school

Seabed

PORT

Fish school

STBD

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

COLOR

In this example, you can see the echoes of a fish school to the right (starboard) of the
ship. Note that the seabed echo is displayed wider as the distance from the ship in­creases. This can make it difficult to see fish near the seabed.

Fore-aft scan, passing over a school of fish

Fish school

AFT

OS position
indicator

FORE

Fish school

CSE
SPD

Seabed

Seabed

GAIN

TVG LEVEL

DISTANCE

COLOR

In this example, you can see the echoes of a fish school in front of the ship (fore). Note
that the seabed echo is displayed wider as the distance from the ship increases.

3-3

3. VERTICAL SCAN MODE

3.4 How to Toggle Full/Half Range Scans

You can alternate the scanned area between full-range scan and half-range scan with
the FULL/HALF SECTOR key .

For detailed instructions on sectors and how to use the FULL/HALF SECTOR key,
see section 1.13.2.

3.5 How to Select the Training Speed

The training speed chooses how fast the transducer scans the display sector. Two
choices are available, 3° (normal speed, default setting) and 6° (high speed).

To change the training speed at any time, press the Train Speed button ( ).
With each press of the button, the train speed switches between 3° and 6°, and the

scan speed is indicated at the top-center of the echo display area.

3.6 How to Adjust the Picture

Echoes from targets (such as the bottom or a fish) return to the transducer in order of
the distance to them, and when their intensities are compared at the transducer face,
those from nearer targets are generally stronger when their reflecting properties are
nearly equal.

If these echoes are displayed directly on the screen, the size of the displayed echo
from the same school of fish may change with distance, making it difficult to judge the
actual size of the school of fish.

To overcome this inconvenience, use the TVG function. It compensates for propaga­tion loss of sound in water: amplification of echoes on short range is suppressed and
gradually increased as range increases, so that similar targets are displayed in similar
intensities irrespective of the ranges to them.

The TVG also functions to suppress unwanted echoes and noise which appears in a
certain range area on the screen.

How to adjust the TVG for vertical scan mode

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3-4

3. Press X or W to select [VERT].

3. VERTICAL SCAN MODE

4. To reduce reflections from the sea surface or plankton, press T to select [TVG
Level] ([TVG Level-LF]/[TVG Level-HF] on CH-600), then press X to show the
[TVG Level] settings.

TVG Level

Gain

Hi

Lo

200m

4. 0

5. Press X or W to adjust the TVG level. Ideally, a setting between 2.0 and 5.0
should be sufficient. A larger setting reduces the gain over distance.
As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

TVG Level
indication
changes to
show the
new setting.

Current setting

New setting

Gain

Hi

TVG Level

4. 0

Lo

200m

6. Press T to select [TVG Distance] ([TVG Distance-LF]/[TVG Distance-HF] on CH-

600), then press X to show the [TVG Distance] settings.

TVG Distance

Gain

Hi

Lo

200m

4. 0

7. Press X or W to adjust the TVG level.
Ideally a setting between 3.0 and 5.0 (130 m to 320 m) is sufficient.

3-5

3. VERTICAL SCAN MODE

As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

Current setting

New setting

The preset distance, in order of [TVG Distance] setting, is as shown in the table
on the following page.

8. Press the MENU key to close the menu and apply the changes.

Gain

Hi

Lo

6. 0TVG Distance

Indications for
distance setting
and actual distance
change to show the
new setting.

320m

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

Hiro (HR)

Passi/braza (pb)

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

Hiro (HR)

Passi/braza (pb)

TVG Distance setting

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

3 8 20 40 60 100 130 160 200 250

10 30 70 130 210 330 410 520 660 820

2 5 10 20 40 60 80 100 110 140

2 5 10 20 40 60 80 100 130 170

2 5 10 20 40 60 80 100 120 150

TVG Distance setting

5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0

360 400 450 500 560 630 710 790 890 1000

1160 1300 1470 1640 1840 2070 2320 2600 2920 3280

200 220 250 280 300 340 390 430 490 550

230 260 300 330 370 420 470 520 590 660

210 240 270 300 340 380 430 480 540 600

320

1040

170

210

180

3-6

4. ECHO SOUNDER MODE

4.1 Typical Echo Sounder Display

The Echo Sounder display mode shows echoes in a manner similar to a conventional
fish finder.

To view this display mode, press .

CSE
SPD

GAIN

TVG LEVEL

DISTANCE

DEP

Number Description

1 Indications for cursor position. (Range from own ship.)
2 Indications for scan direction, tilt angle and train bearing.
3 Indications for range and tilt.
4 Indications for transducer raise/lower status.
5 Own ship or cursor position (latitude/longitude).

Note: Requires connection to appropriate sensors.

6 Navigational data.(Heading, speed, depth, water temperature, tidal current

information.)
Note: Requires connection to appropriate sensors.

7 Echo display settings. (Gain, TVG level, distance.)
8 Depth indication
9 Fish finder echo display.

COLOR

4-1

4. ECHO SOUNDER MODE

4.2 Echo Sounder Menu Overview

The [ES] (Echo Sounder, Fish Finder) menu contains settings and adjustments for the
Echo Sounder mode.

To access the [ES] menu, do the following:

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [ES].
The Echo Sounder menu appears.

Menu
TVG Level

TVG Distance
Gain ADJ.
RES. Color
Clutter
A-Scope

COM1 COM2

: Select

HOR. VERT ES

4. 0

4. 0
0
LOG
0
Off

: Change Menu: Apply

FUNC Key

System

Note: The CH-600 can set [TVG Level], [TVG Distance], [Gain ADJ.],

[RES. Color] and [Clutter] for LF or HF respectively.

The table below lists the menu items with a brief explanation, along with the settings
and ranges available.

Menu item Description Settings/Ranges

[TVG Level] Time Varied Gain. Compensates for propagation loss

0.0 to 10.0; default: 4.0

of sound in water. See section 2.13.3.

[TVG Distance] Time Varied Gain. Compensates for propagation loss

0.0 to 10.0; default: 4.0

of sound in water. See section 2.13.3.
[Gain ADJ.] Adjust the level of gain. -10 to +10; default: 0
[RES. Color] Sets the color scheme for echo display, based on

echo strength.

LOG, Linear, Square,
Cube; default: LOG

• LOG: Weak to strong echoes are displayed in col­ors respective to their echo strength.

• Linear: Downplays weak echoes, compared to
LOG. Effective for suppressing weak echoes such
as plankton.

• Square: Strong echoes are emphasized more than
in Linear.

• Cube: Strong echoes are emphasized even more
than in Square.

[Clutter] Suppresses low intensity echoes, such as sediment.

0, 1, 2, 3; default: 0
The higher the number (setting) the weaker the
echoes which are erased.

[A-Scope] Enables/disables the A-Scope for Horizontal mode. Off, On; default: Off

4-2

4. ECHO SOUNDER MODE

4.3 How to Adjust the Range

The RANGE knob adjusts the range for echo detection and display on all display
modes. There are 15 preset ranges, for Horizontal, Vertical and Echo Sounder modes,
which can be changed to suit your needs.

For preset range default settings, see section 1.10.

4.4 How to Adjust the Tilt

You can point the transducer in any direction between the bottom of the ship (90°) and
to the front of the ship (0°).

To change the title angle, rotate the TILT control. The tilt is adjusted in 1° increments
and the selected angle appears at the top-center of the echo display area for a few
seconds.

4.5 How to Select the Picture Advance Speed

Picture advance speed determines how quickly the scan is displayed on the screen,
from right to left. When selecting a picture advance speed, keep in mind that a fast
speed will expand the echoes horizontally, while a slow speed will contract the
echoes.

1. With the Echo Sounder display mode active, press the FAST SCAN key .
The [Pic. Advance] popup window appears.

2. Press the FAST SCAN key to cycle through the settings, or press the Cursor Pad
to select the appropriate speed setting.
The FAST SCAN key cycles though the settings in the following order:
1/1 o 2/1 o 1/8 o 1/4 o 1/2 o 1/1...
Note: When using the CursorPad to select the speed, the cursor stops at the high­est setting (2/1) and the lowest setting (1/8).

The default setting for picture advance is 1/1.

Picture advance speed and changes to echo display

• 1/1: Picture advances normally, no change to echoes.

• 2/1: Picture advance at twice the normal speed, echoes are expanded.

• 1/8: Picture advances at one-eighth normal speed, echoes are heavily contracted.

• 1/4:Picture advances at one-quarter normal speed, echoes are moderately con-

tracted.

• 1/2: Picture advances at one-half normal speed, echoes are slightly contracted.

4-3

4. ECHO SOUNDER MODE

4.6 How to Adjust the Picture

Echoes from targets (such as the bottom or a fish) return to the transducer in order of
the distance to them, and when their intensities are compared at the transducer face,
those from nearer targets are generally stronger when their reflecting properties are
nearly equal.

If these echoes are displayed directly on the screen, the size of the displayed echo
from the same school of fish may change with distance, making it difficult to judge the
actual size of the school of fish.

To overcome this inconvenience, use the TVG function. It compensates for propaga­tion loss of sound in water: amplification of echoes on short range is suppressed and
gradually increased as range increases, so that similar targets are displayed in similar
intensities irrespective of the ranges to them.

The TVG also functions to suppress unwanted echoes and noise which appears in a
certain range area on the screen.

4.6.1 How to adjust the TVG for echo sounder mode

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X or W to select [ES].

4. To reduce reflections from the sea surface or plankton, press T to select [TVG
Level] ([TVG Level-LF]/[TVG Level-HF] on CH-600), then press X to show the
[TVG Level] settings.

TVG Level

Gain

Hi

Lo

200m

4. 0

5. Press X or W to adjust the TVG level. Ideally, a setting between 2.0 and 5.0
should be sufficient. A larger setting reduces the gain over distance.
As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

4-4

Current setting

New setting

Gain

Hi

Lo

TVG Level

200m

4. 0

TVG Level
indication
changes to
show the
new setting.

4. ECHO SOUNDER MODE

6. Press T to select [TVG Distance] ([TVG Distance-LF]/[TVG Distance-HF] on CH-

600), then press X to show the [TVG Distance] settings.

TVG Distance

4. 0

Gain

Hi

Lo

200m

7. Press X or W to adjust the TVG level.
Ideally a setting between 3.0 and 5.0 (130 m to 320 m) is sufficient.
As the setting is adjusted, the current setting is shown in a dashed line and the
level indication changes to show the new setting.

6. 0TVG Distance

Gain

Current setting

New setting

Hi

Lo

320m

Indications for
distance setting
and actual distance
change to show the
new setting.

The preset distance, in order of [TVG Distance] setting, is as shown in the table
on the following page.

8. Press the MENU key to close the menu and apply the changes.

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

Hiro (HR)

Passi/braza (pb)

Unit of measurement

Meters (m)

Feet (ft)

Fathoms (fm)

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

3 8 20 40 60 100 130 160 200 250

10 30 70 130 210 330 410 520 660 820

2 5 10 20 40 60 80 100 110 140

2 5 10 20 40 60 80 100 130 170

2 5 10 20 40 60 80 100 120 150

5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0

360 400 450 500 560 630 710 790 890 1000

1160 1300 1470 1640 1840 2070 2320 2600 2920 3280

200 220 250 280 300 340 390 430 490 550

TVG Distance setting

TVG Distance setting

320

1040

170

210

180

Hiro (HR)

Passi/braza (pb)

230 260 300 330 370 420 470 520 590 660

210 240 270 300 340 380 430 480 540 600

4-5

4. ECHO SOUNDER MODE

A-Scope

display

area

4.6.2 How to find echo strength with the A-Scope

The A-Scope display shows echoes at each transmission, with amplitudes and tones
proportional to their intensities, at the right-side of the echo display area. This is par­ticularly useful for estimating the type of fish school, or seabed composition.

A-Scope

display

area

DEP

How to enable/disable the A-Scope display

To activate the A-Scope display in Horizontal mode, do the following:

1. Referring to section 4.2, access the [ES] menu.

2. Press T to select [A-Scope], then press X to show the [A-Scope] settings.

3. Press X or W to select the appropriate setting.
Select [On] to show the A-Scope, or select [Off] to hide the A-Scope.

4. Press the MENU key to close the menu.

4-6

5. MENU OPERATIONS

This chapter menu operations not previously explained in this manual.

5.1 How to Access and Use the Menu

There are six menus which contain items that do not require frequent adjustment after
they are set.

To open the [Menu], press the MENU key. If the system is not turned off since the last
menu operation, the last used menu is shown and the last selected menu item is high­lighted (selected). If the system is turned off, the [COM1] menu is shown.

Press the MENU key again to close the menu.

Menu
bar

Menu
items

Operational
guidance

Menu

TX Power
TX Pulse length
TX Rate
Interference
AGC

Auto Filter

Reverberation

Volume

Note: The CH-600 can set [Interference], [AGC] and [Auto Filter] for LF

COM1 COM2

High
Long
1 0
Off
0

Std.

Off

0 . 0

: Select

and HF respectively.

: Change Menu: Apply

HOR. VERT ES

How to use the menu

1. Press the MENU key. The menu window appears.

FUNC Key

System

2. Press S to select the menu bar.

3. Press W or X to select a menu.

4. Press T or S to move the cursor inside the menu and select a menu item.
The guidance box at the bottom of the screen shows a brief explanation for the
selected item and the operations allowed for the selected menu item.

5. Press W or X to show the settings for the select menu item.

6. Press W or X to adjust or change the settings for the selected menu item.

7. To save and apply changes, press the MENU key.

Note: If you change a setting, then select a different menu item, the changes made to
the first menu item are saved.

5-1

5. MENU OPERATIONS

5.2 How to Change the Displayed Language

You can change the displayed language to suit your preferences.

1. Press the MENU key to open the menu.

2. Press S to select the menu bar.

3. Press X to select [System], then press T to select [Go to SYS Menu].

4. Press W to select [Yes]. The [System Menu] appears.

5. Press S or T to select [Language Settings].

6. Press X. The [Language] menu appears.

Language

Language

Change

Menu

Apply

7. Press X or W to select the appropriate language setting, then press the MENU
key. All menus and most indications are now displayed in the selected language.

Note: Some languages may require a password. For further information, consult your
local dealer.

5.3 COM1 Menu

Referring to section 5.1, access the [COM1] menu. The following table lists the
[COM1] menu contents with a brief explanation for each menu item.

Menu item Description Settings/Ranges

[TX Power] Adjusts the transmission power. [High], [Low]; default: [High]
[TX Pulselength] Sets the transmission pulselength. [Long], [Short]; default: [Long]
[TX Rate] Sets the transmission rate (number of

transmissions per scan).

[Interference] Enable/disable the interference rejector. [Off], [On]; default: [Off]
[AGC] Automatic Gain Compensation. Auto-

matically adjusts the sensitivity against
strong echoes, such as those from the
seabed, to emphasize weak echoes,
such as those from fish close to the sea­bed.

[Auto Filter] Available only when [Auto Filter] in the

[Audio] menu is set to [On]. Adjusts for
doppler shift, created when the ship is in
motion, to stabilize the displayed
echoes.
This feature requires speed, course and
heading data.

[EXT], [1] to [10]; default: [10]
For external video sounder or sonar,
select [EXT].

[0] (Off), [1], [2], [3], [4], [5]; default: [0]

[Wide], [Std.], [Narrow]; default: [Std.]
[Wide] gives a better resolution image,
however noise is increased.
[Narrow] gives a lower resolution im­age with noise reduced.
Note: Fast moving fish, such as Tuna,
may not be detected when using the
[Narrow] setting.

[Reverbration] Reduce the volume for reverberation

from the transducer.

5-2

[Off], [On]; default: [Off]

5. MENU OPERATIONS

Menu item Description Settings/Ranges

[Volume] Adjusts the volume for the optional ex-

ternal speaker. The speaker emits a
tone when fish are detected.

[0.0] to [10.0]; default: [0.0]

5.4 COM2 Menu

Referring to section 5.1, access the [COM2] menu. The following table lists the
[COM2] menu contents with a brief explanation for each menu item.

Menu item Description Settings/Ranges

[Delete Tack] Deletes the own ship track. [No], [Yes]; default: [No]
[White Marker] Disable/enable the white marker. The white

marker can be set to a corresponding echo
strength (color), which is then displayed in
white. this function is useful when you need to
separate bottom fish from the seabed.

[Erase Color] Erases echo colors on the display. The

echoes are erased in order from weakest to
strongest.

[Echo Colors] Sets the number of colors used to paint the

picture.

[BCKD. Colors] Selects the color scheme for the display.

these colors can be adjusted from the [Color
Settings] menu in the [System] menu (see
section 5.8).

[Bearing] Sets the reference to use for bearing. [Relative], [True.]; default: [Rela-

[Heading] Adjust the direction of ship’s heading. Echo

image rotates clockwise with positive value it
rotates counterclockwise with negative value.

[Roll Offset] Adjust the roll offset angle of hull unit. The an-

gle is offset to port with positive value. The
angle is offset to starboard with negative val­ue.

[Pitch Offset] Adjust the pitch offset angle of hull unit. The

angle is offset to port with positive value. The
angle is offset to starboard with negative val­ue.

[Sensor Cor­rect]

Offset the motion sensor direction. The angle
is offset to clockwise when positive value is
selected. The angle is offset to counterclock­wise when negative value is selected.

Setting range depends on setting
for [Echo Colors].

• 32 colors: [Off], [1] to [31];
default: [Off]

• 16 colors: [Off], [1] to [15];
default: [Off]

• 8 colors: [Off], [1] to [7];
default: [Off]

Setting range depends on setting
for [Echo Colors].

• 32 colors: [Off], [1] to [30];
default: [Off]

• 16 colors: [Off], [1] to [14];
default: [Off]

• 8 colors: [Off], [1] to [6];
default: [Off]

[32], [16], [8]; default: [32]

[1], [2], [3]; default: [2]

tive]

-180 to +179°; default [+0°]

-10.0 to +10.0°; default [+0°]

-10.0 to +10.0°; default [+0°]

-180 to +179°; default [+0°]

5-3

5. MENU OPERATIONS

5.5 System Menu

The System menu contains settings which can be adjusted according to your prefer­ences.

A simulation mode is also included to acquaint you with the many functions of the
equipment. The simulation mode does not require a connected transducer.

How to access the System menu

1. Press the MENU key. The menu window appears.

2. Press S to select the menu bar.

3. Press W or X to select [System].

4. Press T to select [Go to SYS Menu].

5. Press W to select [Yes]. The [System] menu appears.

System Menu

System Settings
Range Settings
Train Speed Setting
Color Settings
Language Settings
System Backup
Load Backup Data
Preset Backup
Load Preset Data
Draught Offset

TX Frequency Offset
Audio
Tests
Test Pattern
NMEA Port Monitor
Simulation
Restore Initial Settings

Set at installation. See the
installation manual.

See Chapter 6.

: Select

: Change

Menu: Close

5-4

5.6 FUNC Key Menu

Function keysFunction keys

The system has three function keys which can be customized to suit your needs. Each
key can be assigned either as a preset key, or as a short-cut key.

Preset keys store the display mode, sector, train angle, scan range, tilt angle, scan
speed and gain. This allows you to preset for specific operations.

Short-cut keys provide quick access to preset functions. The short-cut key options are
not changeable.

5.6.1 How to setup the function keys

5. MENU OPERATIONS

To setup a function key, do the following:

1. Referring to section 5.5, access the [System] menu.

2. Press  or  to select [System Settings], then press . The [System Settings 1]
menu appears.

3. Press  to show the [System Setting 2] menu.

4. Press  to select [FUNC Key1], [FUNC Key2] or [FUNC Key3], as required.

5. Press  or  to select [Preset Key] or [Short-Cut Key], as required.

6. Press the MENU key twice to close the menu.

5.6.2 Short-cut keys

You can select the function for each shortcut key as follows:

1. Referring to section 5.6.1, access the [FUNC Key] menu.

2. Press  or  to select the appropriate key.

3. Press  or  to select the required short-cut.The table below shows the options
available for each key.

Menu item Settings Description

[Key1] [Preset Key] Enable calling up the Preset key setting you have set.
[Key2] • [VERT Search]

• [Delete Mark]

[Key3] • [VERT Search]

• [Delete Mark]

4. Press the MENU key to close the menu.

• Enables the Vertical Search function.

• Deletes all event marks.

• Enables the Vertical Search function.

• Deletes all event marks.

5-5

5. MENU OPERATIONS

How to add menu short-cuts to the short-cut keys

To add a menu function as a short-cut, follow the procedure below.
Note: The function key used for this short-cut must be assigned as a [Short-Cut Key].

See section 5.6.1 for details.

1. Press the MENU key. The menu window appears.

2. Press S to select the menu bar.

3. Press W or X to select the menu which has the function you want to add as a
short-cut. The menus which contain function that can be added are: [COM1],
[COM2], [HORI.], [VERT] and [ES].

4. Press T or S to select the function you want to add, then press the appropriate
function key. A confirmation message appears.

5. Press the function selected at step 4 again. The function is registered as a short­cut.

6. Referring to section 5.6.1, access the [FUNC Key] menu and check that the func­tion is registered.

7. Press the MENU key to close the menu.

Note: When the short-cut setting for a function key is changed to [VERT Search] or
[Delete Mark], menu short-cuts are deleted. To re-register a menu function as a short­cut, repeat the above procedure.

5.6.3 Preset keys

You can adjust the preset keys suit your needs. To adjust the presets, do the following:

1. Set the display mode, sector, train angle, scan range, tilt angle, scan speed and
gain to the settings you want to store. This will become the preset.

2. Referring to section 5.6.1, access the [FUNC Key] menu.

3. Press the appropriate function key. A guidance message is shown above the
menu.

Note: The selected key must be setup as a [Preset Key]. See section 5.6.1.

4. Press the function key again to store the current display mode settings. The table
below shows the pre-programmed (default) settings for each key.

Menu item Settings

[Key1] • Display mode: Horizontal (zoomed)

• Sector setting: 240°

• Train angle: 0°

• Scan range: 160 m

[Key2] • Display mode: Horizontal

• Sector setting: 360°

• Train angle: 0°

• Scan range: 160 m

[Key3] • Display mode: Vertical

• Sector setting: 180°

• Train angle: 90°

• Scan range: 120 m

5. Press the MENU key to close the menu.

• Tilt angle: 30°

• Scan speed: 12°

• Gain: 5.0

• Tilt angle: 30°

• Scan speed: 12°

• Gain: 5.0

• Tilt angle: 90°

• Scan speed: 6°

• Gain: 5.0

5-6

5. MENU OPERATIONS

5.7 How to Adjust the Preset Range Settings

The Range Settings menu contains the range presets. You can change the presets to
suit your requirements as follows:

1. Referring to section 5.5, open the [System] menu.

2. Press T to select [Range Settings], then press X to open the [Range Settings]
menu.

Range Settings

Menu

1 0
1 1
1 2
1 3
1 4
1 5

Restore Default Settings

: Select

HOR.

1
2
3
4
5
6
7
8
9

: Change Menu: Apply

VERT ES

(

1 0

10~2400m
2 0
4 0
6 0
8 0

1 0 0
1 2 0
1 6 0
2 0 0
2 5 0
3 0 0
4 0 0
5 0 0
6 0 0

1 0 0 0

No

)

Yes

Selected
mode

Setting
range
available

The available setting range for each mode is shown at the top-right of the menu
window.

3. Press X or W to select the mode for which to change the preset range. The se­lected mode is highlighted in a manner similar to that indicated in the above figure.

4. Press T or S to select the preset number to change.

5. Press X to increase the range or W to decrease the range.
The range changes in five meter increments between 10 m and 100 m. Between
100 m and the maximum range, the range changes in ten meter increments.

6. Press the MENU key several times to close the menu.

How to restore the default range presets

You can restore the default preset ranges for each mode individually.

1. Referring to section 5.5, open the [System] menu.

2. Press T to select [Range Settings], then press X to open the [Range Settings]
menu.

3. Press T to select [Restore Default Settings], then press X. A confirmation window
appears.

4. Press X to select [Yes], then press the MENU key.
To cancel the procedure, select [No], then press the MENU key.

5-7

5. MENU OPERATIONS

5.8 How to Enable/Disable Train Speed Presets

The train speed button ( ) has six preset settings, each of which can be activat­ed, or deactivated, to suit your requirements.

To activate/deactivate a speed setting, to the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T to select [Train Speed Setting], then press X to open the [Train Speed
Setting] menu.

Train Speed Setting

Current selection
is highlighted

: Select

6°

1 2°

1 5°

1 8°

2 1°

2 4°

: Change Menu: Apply

Off

Off

Off

Off

Off

Off

On

On

On

On

On

On

3. Press T or S to select a speed setting.

4. Press X or W to select [Off] (deactivate) or [On] (activate), as appropriate.

5. Press the MENU key twice to close the menu.

5.9 How to Change the Displayed Colors

You can customize the color settings for echoes, the display color scheme (back­ground, menu and text colors) and the Full-circle A-Scope display mode.

To customize the colors, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press S or T to select [Color Settings]. The [Color Palette] window appears.

Echo color settings

Background, text and

menu color settings

Full-circle A-Scope color settings

Current selection

RGB settings

5-8

Color Palette

Echo

Text Menu

BKGD

BKGD. 1 BKGD. 2 BKGD. 3

Full A-Scope

Color

Echo 1

:

No Yes

: Select

BKGD

Text Menu

All settings will be restored to default.Default Set:

: Change Menu: Apply

BKGD

Text Menu

5. MENU OPERATIONS

3. The cursor appears as shown in the figure above. Referring to the figure above
and the table below, press X or W to move the cursor to the setting you wish to
change. The currently selected item is also shown next to the [Color] indication at
the lower half of the window.

[Echo] Changes the echo colors based on echo strength. The lowest

setting ([1]) is the color for the weakest echoes. The highest set­ting ([31]) is the color for the strongest echoes.

[BKGD1], [BKGD2],
[BKGD3]

[Full A-Scope] Sets the base color for the Full-circle A-Scope display. This color

[Color:] The item currently selected by the cursor appears here.
RGB settings Adjust the red, green and blue color saturation for the selected

[Default Set] Restores the default color settings.

Sets the color for each preset color scheme. [BKGD] sets the
background color, [Text] sets the text color and [Menu] sets the
menu background color.

does not affect the Horizontal or Echo Sounder side-display A­Scope.

item.

4. Press S or T to select [R] (red), [G] (green) or [B] (blue).

5. Press X to increase the color saturation, or press W to decrease the color satura­tion. The current color mix appears in the palette window to the right of the RGB
settings.

6. Repeat the procedure as required.

5.10 How to Backup/Restore Settings

The system can save either a full (System Backup) or partial (Preset Backup) backup.
The full backup saves all user customizations, including [System] menu settings.
The partial backup saves only the menu settings for the [COM1], [COM2], [HOR.],

[VERT], [ES] and [FUNC Key] menus.

How to backup your settings

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [System Backup] (full backup) or [Preset Backup] (partial
backup), then press X. A confirmation window appears. The example below
shows the full backup confirmation window. Note that the title at the top of the win­dow changes depending on your selection.

System Backup

Are You Sure?

No

Internal

Previous backup data will be overwritten.

Note:

: Change

Menu: Apply

3. Press X or W to select [No] or [Internal], as appropriate.

• [No]: Backup is stopped, no settings are saved.

• [Internal]: System settings are saved in the Transceiver Unit’s internal memory.

Note: Previous backup data will be overwritten.

5-9

5. MENU OPERATIONS

4. Press the MENU key to backup the system settings. The system releases a series
of beeps to indicate that the data is saved, then the [System] menu appears.

5. Press the MENU key to close the menu.

How to restore your settings

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Load Backup Data] (full system settings) or [Load Preset
Data] (partial settings), then press X. A confirmation window appears. The exam­ple below shows the full system settings confirmation window. Note that the title
at the top of the window changes depending on your selection.

Load Backup Data

Are You Sure?

No

Note:

: Change

Load Internal Data

Current settings will be overwritten.

Menu: Apply

3. Press X or W to select [No] or [Load Internal Data], as appropriate.

• [No]: No backup data is loaded, settings remain unchanged.

• [Load Internal Data]: System settings are loaded from the Transceiver Unit’s in-

ternal memory and replace the current settings.

4. Press the MENU key to load the system settings. The system releases a series of
beeps to indicate that the data is saved, then the [System] menu appears.

5. Press the MENU key to close the menu.

5.11 How to Adjust the Transmission Frequency

If the system is receiving interference from a video sounder to other sonar on your
ship, adjust the frequency to reduce interference.

5-10

1. Referring to section 5.5, open the [System] menu.

2. Press S or T to select [TX Frequency Offset], then press X. The [TX FREQ. Ad­just] window appears.

TX FREQ. Adjust

FREQ. Shift :

(

1 8 0. 0 k H z

: Change Menu: Apply

1 7 1 ~ 1 8 9k

Hz

)

Frequency range and default
settings are dependent on
the transducer. This figure
shows the TX FREQ. Adjust
options for the 150 kHz
transducer.

3. Press X to increase the transmission frequency, or press W to decrease the trans-
mission frequency.

4. Press the MENU key twice to close the menu.

5.12 How to Adjust the Speaker Settings

For CH-600 only

The optional speaker is available for use with your CH-500/CH-600. By connecting a
speaker, you can “hear” fish echoes, which allows you to move about your ship freely
while fishing.

You can change the following settings for the speaker: output frequency, output band­width, harmonic pattern and doppler shift filter.

In most cases, these settings are done during the first voyage after installation, and
require almost no adjustment once set.

5.12.1 How to adjust the speaker frequency

To adjust the output frequency for the speaker, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Audio], then press X. The [Audio] settings window ap­pears.

Audio

5. MENU OPERATIONS

1 ~ 3

On

)

(0.90

~1.20

Low FREQ

Audio FREQ.

Bandwidth Wide Std.

Auto

Filter

: Select

1. 0 0 k H z

:

:

:

1Harmonic Pattern

:

Off

:

High FREQAudio Priority

: Change

(

Menu: Apply

3. [Audio FREQ.] is already selected. Press X or W to show adjust the frequency.
The available range is 0.90 kHz to 1.20 kHz.

4. Press the MENU key twice to close the menu.

5.12.2 How to select the speaker bandwidth

You can customize the sound bandwidth to suit your preferences.
To set the output bandwidth, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Audio], then press X. The [Audio] settings window ap­pears.

)

kHz

Narrow

For CH-600 only

3. Press S or T to select [Bandwidth].

4. Press X or W to select the required bandwidth. The available options are:

• [Wide]: Sound output is based on a wide bandwidth. Auto Filter settings are

more effective with this setting.

• [Std.]: Default setting. Sound output is based on a normal bandwidth. Auto Filter

settings are effective with this setting.

• [Narrow]: Sound output is based on a narrow bandwidth. Auto Filter settings

have low effect with this setting.

5. Press the MENU key twice to close the menu.

5-11

5. MENU OPERATIONS

5.12.3 How to set the harmonic pattern

You can customize the sound output to suit your preferences.
To adjust the harmonic pattern, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Audio], then press X. The [Audio] settings window ap­pears.

3. Press S or T to select [Harmonic Pattern].

4. Press X or W to select the desired pattern.
The available options are: [1], [2] and [3].

5. Press the MENU key twice to close the menu.

5.12.4 How to filter for doppler shift

You can filter the sound output to compensate for doppler shift, created by your ship
when in motion, or a moving school of fish.

To enable or disable the auto filter, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Audio], then press X. The [Audio] settings window ap­pears.

3. Press S or T to select [Auto Filter].

4. Press X or W to select [Off] (disable the filter) or [On] (enable the filter). The output
sound is affected in the following manner:

• [Off]: Doppler shift is not compensated. Detected echoes are output with the

sound level increasing incrementally for echoes moving toward the ship, and
decreasing incrementally for echoes moving away from the ship.

• [On]: Doppler shift is compensated. Echoes are output in the same manner, re-

gardless of direction.
Note: The filter is only applied to doppler shift from fish echoes and own ship

movement. It does not affect doppler shift from other sources.

5. Press the MENU key twice to close the menu.

5-12

5.13 How to Use the Simulation Mode

The simulation mode uses internal data to portray echoes on the screen and give you
a better idea of how come functions and settings work.

The simulation mode does not require connection to a transducer and all sonar func­tions are available.

Note 1: During simulation, the system will not detect any actual echoes. Do not use
the simulation mode when underway, for safety.

Note 2: When the simulation mode is active, the indication "SIM" appears at the top
of the screen.

To start or stop the simulation mode, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Simulation], then press X. The [Simulation] settings win­dow appears.

Simulation settings

5. MENU OPERATIONS

Simulation mode: No Load Internal Data

: Change Menu: Apply

3. Press X or W to select the appropriate option.

• [No]: Simulation is stopped, normal operations and functions are all available.

• [Load Internal Data]: Start the simulation using data stored in the Transceiver

Unit.

4. Press the MENU key to confirm the selection and either start or stop the simula­tion.

5. Press the MENU key again to close the menu.

5-13

5. MENU OPERATIONS

5.14 How to Restore the System Menu to Default Set­tings

You can restore all the [System] menu settings to default settings at any time.
Note: All user settings and customizations in the [System] menu and sub-menus are

lost when this procedure is completed. Settings for [COM1], [COM2], [HOR.], [VERT],
[ES] and [FUNC Key] menus are not affected.

To restore the default settings, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Restore Initial Settings], then press X. The confirmation

window shown below appears.

Restore default setting

Are You Sure?

Note : Reset all the settings included in system menu
to default.

: Change Menu: Apply

3. Press X or W to select the appropriate option.

• [No]: Current settings remain unchanged.

• [Yes]: Restores the [System] menu and all sub-menus to factory default set­tings.

No

Yes

5-14

5. MENU OPERATIONS

5.15 System Settings menu

The System Settings menu contains two sub-menus. The settings in these menus
rarely require adjustment once set, further, some of the menu items listed below are
set at installation and should require no adjustment.

The following tables list the contents of the [System Setting] menu, together with a
brief description for each menu item.

System Setting 1 tab

Menu item Description

[Position Display]* Sets the reference point for position to be displayed on the

screen.
Select [Ship’s L/L] to show the current location of the ship or [Cur­sor L/L] to show the coordinates for the cursor location. The nav­igational data (heading) and the longitude and latitude of own ship

is required to show the longitude and latitude of the cursor.
[Track]* Select [On] to show own ship track, or [Off] to hide the track.
[Current Data] Show or hide the tidal current vector.

Select [Off] to hide the vector, [Inbound] to show the vector for tid-

al currents moving towards your ship or [Outbound] to show the

vector for tidal currents moving away from your ship
[Heading Indication]* Sets the reference for heading display.

Select either [True] or [Azimuth] as appropriate.
[Display Range Ring] Show or hide the range rings.

Select [Off] to hide, or [On] to show the rings.
[North Mark] Show or hide the NORTH mark.

Select [Off] to hide, or [On] to show the mark.
[CSE. Data]* Sets the source for course data.

Select [Nav.] to show course data from a navigator (NAVpilot, etc)

or [Gyro] to show course data from a gyrocompass.
[Nav. Data]* Sets the source for navigational data.

Select [GPS] to show nav data from a GPS device, or [Other] to

show nav data from a source other than a GPS device.
[NMEA1 Baudrate] Sets the baud rate for the selected port.
[NMEA2 Baudrate]
[TVG Correction] Sets the level for automatic TVG correction.

Units Sets the unit of measurement to use when showing depth.

[Temp Display]* Sets the unit of measurement for temperature.

[Temp Graph]* Shows or hides the temperature graph.

[TLL Output] Select [Off] to disable TLL output or [On] to enable TLL output to

Select from [4800], [9600], [19200] or [38400], as appropriate.

Select [Off] to disable automatic TVG, [1/2] or [1/1] to automatical-

ly adjust the TVG accordingly.

Select the appropriate unit from [m] (meters), [ft] (feet), [fm] (fath-

oms), [HR] (HIRO) or [pb] (passi/braza).

Select either [°C] or [°F] as appropriate.

Select [Off] to hide the graph, [20 min] or [60 min] to show a graph

for the appropriate period of time.

external equipment.

*: Requires connection to appropriate sensors.

5-15

5. MENU OPERATIONS

System Setting 2 tab

Menu item Description

[Gain Setting Protect] Select [Off] to disable gain setting protection, or [On] to enable

protection.

[Emphasis Mode] Sets the method of smoothing (emphasis) for the displayed

echoes.
Select from [Off] (no echo picture adjustment), [Normal] (echoes
are shown with evenly, based on strength) or [Red] (emphasizes
the stronger echoes only).

[Stabilizer] Sets the method of compensation for roll/pitch.

Select from:

• [Off]: disabled.

• [On(Std.)]: use the data from the built-in motion sensor. (Rec­ommended).

• [On(Gyro)]: use only the angular velocity data from the built-in
motion sensor.

[Auto Retract] Sets the speed to activate the auto retraction feature for the hull

unit.
Select [Off] (disabled) or set the required speed at which to auto­matically retract the hull unit.
Note: The maximum speed allowable while the hull unit is retract­ed is 15 knots. If the vessel has rapid acceleration capabilities, it
is mandatory to set Auto Retract between 10 knots to 12 knots.

[Speed Alarm/Message]* The speed alarm and message are a useful tool to help avoid

damage to the hull unit caused by excessive speed.
This function enables or disables the speed alarm.
Select [Off] to disable the alarm and message, or [On] to enable
the alarm and message.
When this setting is enabled, lowering or retracting the hull unit at
speeds over 15 knots will trigger the alarm and display a an alarm
message.

[Sweep Indicator] Sets the display method for the train position/tilt angle.

Select either [Dot] (hashed line) or [Line] (solid line) as required.

[Menu BKGD. Transp.] Sets the transparency level for the menu.

Select [Off] (menu is displayed with a solid background, covering
all echoes behind the menu) or select the appropriate level of
transparency from [1] (menu background is slightly transparent)

to [5] (menu background is highly transparent).
FUNC Key1/2/3 See section 5.6.
Default Settings Resets the system to default settings. Select [No] to keep current

settings, [Yes] to restore all settings to default.

Note: This function clears all user settings, menu settings and all

customizations.

*: Requires connection to appropriate sensors.

System Setting 3 tab

Menu item Description

[HOR./HISTORY] Select HORIZONTAL/HISTORY display mode. See section 1.5.
[HOR./VERT.] Select HORIZONTAL/VERTICAL SCAN display mode. See section 1.5.
[HOR./VERT ZOOM] Select HORIZONTAL/VERTICAL ZOOM display mode. See section 1.5.
[Full A-Scope] Select Full-circle A-Scope display mode. See section 1.5.
[HOR./Full A-Scope] Select Full-circle A-Scope + Horizontal display mode. See section 1.5.

5-16

6. MAINTENANCE, TROUBLE­SHOOTING

This chapter provides information necessary to keep the equipment in working order.

WARNING

ELECTRICAL SHOCK HAZARD
Do not open the equipment.

Only qualified personnel
should work inside the
equipment.

6.1 Preventative Maintenance

Check the following items monthly.

• Check cables. If a cable is damaged, replace it.

• Check the connectors at the rear of each unit. Clean the connectors if necessary.

• Check the earth (grounding) for each unit. Clean or replace if necessary.

• Check the voltage of the ship’s mains to make sure it is within range of the equip-

ment’s power rating.

6.2 How to Clean the Equipment

Dust or dirt can be removed from the equipment with a soft, dry cloth.
Do not use chemical cleaners to clean the equipment, they can remove paint and

markings.
The LCD will, in time, accumulate a coating of dust which tends to dim the picture.

Wipe LCD lightly with soft cloth to remove dust.

6-1

6. MAINTENANCE, TROUBLESHOOTING

6.3 Hull Unit Maintenance

6.3.1 Hull unit lubrication

Apply MOLYTONE grease
#2 once a year.

1

Equivalent greases:

*
SHOWA SHELL OIL: Shell Albania
Grease S No.2
EXXON MOBIL: Mobilux EP No.2
NIPPON OIL CORPORATION: Multinox
Grease No. 2

2

*

To keep marine life off your transducer,

apply a coat of anti-foulant (SEAT­ENDER20) when the ship is dry docked.

Coat the drive shaft with
Daphne Eponex Grease No.2
(IDEMITSU KOSAN
CO.,LTD.*

Raise transducer and coat main
shaft with Daphne Eponex Grease
No.2 (IDEMITSU KOSAN
CO.,LTD.*

Dry dock the ship and clean the transducer
face yearly. Do not paint metallic parts
such as the transducer flange.*

1

) once a year.

1

) every six months.

The gasket is a consumable item.
If water leaks from the shaft,
tighten the bolts that hold the
gasket in place. If water still leaks,
the gasket should be replaced.
Quote the following details when
you order a replacement gasket.
Type: V8133L 9.5 3M
Code: 000-192-908-10

2

6-2

6. MAINTENANCE, TROUBLESHOOTING

6.3.2 Manually raise/lower the transducer

WARNING

Turn off the power at the ship’s
mains switchboard before
conducting the procedure below.

The motor can cause injury when rotating.

1. Turn off the breaker on the hull unit.

2. Turn the nut with a 19 mm ratchet wrench.

Attach ratchet
wrench here.

3. Check that the transducer raises and lowers smoothly, from the upper limit to the

lower limit positions. If the transducer cannot be raised/lowered smoothly, do not
use excessive force; the shaft may bend, causing damage to other components.

4. Check the soundome and tank. Remove any marine life with fine sandpaper or a

piece of wood.

6-3

6. MAINTENANCE, TROUBLESHOOTING

6.4 Transducer Maintenance

When the ship is dry-docked, remove marine growth from the transducer with fine
sandpaper or a piece of wood.

NOTICE

Do not paint the transducer face with
sunbstances other than anti-foulant.

Loss of sensitivity will result.

Do not use plastic solvents to clean the
transducer.

They can damage the transducer.

6.5 How to Replace the Fuses

WARNING

Use the proper fuse.

Use of the wrong fuse can cause
fire or damage the equipment.

The fuse in the hull and transceiver units protect them from overvoltage, equipment
fault and reverse polarity of the ship’s mains. If the power cannot be applied first check
that the power cable between the transceiver unit and the display unit is firmly con­nected. If the power still cannot be applied, the fuse in the transceiver unit may have
blown.

Have a qualified technician check and change the fuse.

Unit Fuse type Code No.

Transceiver Unit FGMB 125V 8A 000-191-004-10
Hull Unit 0287010.U 000-193-054-10

FGMB 125V 6A 000-157-492-10

6-4

6.6 Troubleshooting

The following table lists common symptoms of equipment trouble and possible means
to rectify them.

Symptom Checks and remedies

Cannot turn the power on. • Check the cable between the transceiver unit and the

Cannot turn the power off. • Check the cable between the transceiver unit and the

Seabed echo becomes ir­regular.

Weak echoes. • Output power is set to [Low]. Change the output power

Screen color appears
strange.

Picture contains noise. • The equipment may not be grounded correctly. Check

Picture does not change
when the tilt angle is adjust­ed. (Seabed does not ap­pear in the vertical scan
when the seabed is flat.)

Water leakage from the hull
unit’s shaft flange.

6. MAINTENANCE, TROUBLESHOOTING

display unit. Re-connect or fasten as appropriate.

• Check that the transceiver is turned on.

• Check the ship’s mains.

• Have a qualified technician check the fuses.

• Make sure the power button makes a “click” sound
when you press it. If the power button is not pressed
sufficiently, the power will not turn on.

display unit. Re-connect or fasten as appropriate.

• Check that the control unit used to turn the power off is
the same as the one used to turn the power on.

• Make sure the power button makes a “click” sound
when you press it. If the power button is not pressed
sufficiently, the power will not turn off.

• Rough seas. The distance to the seabed changes dra­matically due to pitching and/or rolling.

• Long range selected. Transmission period is long,
which causes pitching/rolling to affect echo detection.

to [High] from the [COM1] menu.

• TVG setting is excessively high. Adjust the TVG setting
from the appropriate display mode menu. Also note
that TVG requires readjustment when the gain setting
is changed.

• The brilliance setting may be too low. Adjust the bril­liance referring to section 1.4.

the ground (earth) for the equipment.

• Power cable is too close to the signal cable. Relocate
the power cable or the signal cable.

• Debris may be on the sea surface. Turn the [Interfer­ence] on from the [COM1] menu.

• There may be a problem with the tilt mechanism or the
tilt control line. Contact your local dealer for advice.

• Wipe the area dry, then check the area around the gas­ket retaining plate. If water is leaking from the retaining
plate, tighten the bolts.

• If water still leaks after the above checks and reme­dies, the gasket may require replacement. Contact
your local dealer and request service/replacement.
See section 6.3.1 for part details.

Note: When the hull unit no longer leaks, check that the
main shaft can move freely and adjust as necessary.

6-5

6. MAINTENANCE, TROUBLESHOOTING

6.7 Error Messages

There are several error messages which may appear on the screen, for various rea­sons. All error messages are accompanied by an audio alarm.

You can silence the audio alarm by pressing the EVENT MARK key ( ).
The following table lists the possible errors messages, together a possible reason and

remedy.

Error Possible meaning, remedy

Raise/lower function has stopped. Slow down
under 15 knots, and please try to raise or low­er the soundome. If the message appears
again, turn off the hull unit and raise or lower
manually.

Raise/lower function has not finished. Maxi­mum allowable speed is 15 knots while soun­dome is being retracted.

Ship speed in excess of 15 knots. Slow down
under 15 knots when moving transducer unit.

Hull unit power off. Turn off the hull unit power,
then check the breaker and fuse.

Hull unit power off. Check hull unit power’s
fuse and switch.

Frequency error. Check hull unit. Unable to detect the frequency.

Train Tilt error. Check hull unit’s connections
and power.

Transducer is lowered. Reduce ship’s speed
and press n key to retract transducer.

No external KP input. Check connection to ex­ternal synchronous device.

06P0289 (ANLG) does not match the frequen­cy of the transducer. Check PCB version.

You attempted to raise or lower the soundome
when the ship speed is higher than 15 knots, or the
breaker on the hull unit is tripped.
Check the breaker and lower the ship speed to be­low 15 knots, then try to raise/lower the soundome
again.
If the same error is repeated, turn the hull unit off,
raise the soundome manually, then conduct the hull
unit diagnostic test outlined in section 6.3.2.

• There is no power supplied to the hull unit.
The breaker may be tripped or the fuse inside the
hull unit is blown.
Check that the power is on.
If the hull unit is not turned on, turn the power on,
then press the EVENT MARK key.
If the hull unit power is on, turn the power off,
then consult your local dealer.

• Power cable is loose or disconnected.
Check the power cable connections. Fasten or
reconnect as necessary.

Silence the alarm, then check the hull unit connec­tions and power.
If the connections are correct and the power is on,
but the problem persists, consult your local dealer.

The system cannot detect the bow direction or
there is a problem with the train/tilt motor.
Check the motor and replace if necessary.

You attempted to maneuver the ship, at speeds of
more than 20 knots, with the transducer still low­ered. Reduce ship speed to below 15 knots, then
try again.

Keying pulse signal from an external source has
stopped or was interrupted.
Check the connections to, and status of, the exter­nal device.

Unmatched transducer frequency may cause a
fault to the 06P0289 (ANLG) board. Consult your
local dealer.

6-6

6.8 Diagnostics

6.8.1 How to perform a full system test

The [Tests] function conducts a comprehensive test on the transceiver unit, monitor
unit and the control panel.

To begin a diagnostic test, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Tests], then press X. The system test results window ap­pears.

CH-500

CH-600

DIGI DIPSW : 00000101 (05)
DRV DIPSW : 0000 (0)

6. MAINTENANCE, TROUBLESHOOTING

Hardware and
software test
results.

RX_TEST(RX_ONLY)

Control panel and
remote control
key test results.

: 64.3/63.8

Press MENU key 3 times to exit.

3. After a few moments, the hardware and software results should appear in the win­dow. Check that no items show the result as "NG" (Not Good). If any item shows
"NG" contact your local dealer for advice.

4. Press each key on the panel and remote control. The indication for each key
should change from "0" to "1" when the key is pressed. When the key is released,
the indication should change back to "0". If the indication does not change, there
may be a problem with the control panel. Contact your dealer for advice.

5. To exit the diagnostic test, press the MENU key three times, in quick succession.

6-7

6. MAINTENANCE, TROUBLESHOOTING

Red gradation

Green gradation

Blue gradation

White

Red

Green

Blue

Black

Crosshairs

Black & white

checkered

6.8.2 How to test the LCD

The Test Pattern function checks the LCD colors.
To check the LCD, do the following:

1. Referring to section 5.5, open the [System] menu.

2. Press T or S to select [Test Pattern], then press X. The LCD test starts and the
message "Press X to change test pattern. Press MENU key to exit." appears at
the bottom of the screen.

3. Press X to cycle through the screens in the order shown below.

Red gradation

Green

Green gradation

Blue

Blue gradation

Black

White

Crosshairs

Red

Black & white

checkered

6-8

6. MAINTENANCE, TROUBLESHOOTING

Control unit

6.9 How to Remove and Re-install the Display Unit

During the off-season, or if your ship is not used for a lengthy period of time, you can
remove the display unit for security.

6.9.1 How to remove the display unit

1. Disconnect all cables connected to the display unit.

2. Cover the connector ends with vinyl tape to prevent foreign objects entering the
connectors. Also, cover the tape cable ends with a plastic bag, sealed at the cable
with vinyl tape, to prevent water intrusion.

3. Unfasten the knobs on the display unit (one per side).

Knob
(2 pcs)

Hanger

Control unit

4. Remove the display unit from the hanger.

6.9.2 How to re-install the display unit

1. Place the display unit in the hanger. Make sure that the display unit is facing in the
correct direction.

2. Fasten the knobs to the hanger (one per side).

3. Uncover the cable connector ends. Check that each connector is clean and has
no foreign objects inside.

4. Connect all required cables to the display unit.

5. Fasten all cables firmly.

6-9

6. MAINTENANCE, TROUBLESHOOTING

This page is intentionally left blank.

6-10

APPENDIX 1 MENU TREE

CH-500/CH-600

Main menu

├

COM1

1

├

COM2

2

├

HOR.

3

├

VERT

4

├

ES

5

├

FUNC Key

6

└

System

7

CH-500

Bold Italic: Default

1 COM1

├

TX Power (High, Low)

├

TX Pulselength (Long, Short)

├

TX Rate (EXT., 1 to 10; default: 10 )

├

Interference (Off, On)

├

AGC ( 0, 1, 2, 3, 4, 5)

├

Auto Filter (Wide, Std. , Narrow)

├

Reverberation (Off, On)

└

Volume (0.0 to 10.0, default: 0.0)

2 COM2

├

Delete Track (No , Yes)

├

White Marker (Off, 1 to 31; default: Off)

├

Erase Color (Off, 1 to 30; default: Off)

├

Echo Colors (32, 16, 8)

├

BKGD. Colors (1, 2, 3)

├

Bearing (Relative, True)

├

Heading (-180 to +179º; default: +0º)

├

Roll Offset (-10.0 to +10.0; default: +0.0º)

├

Pitch Offset (-10.0 to +10.0; default: +0.0º)

└

Sensor Correct (-180 to +179º; default: +0º)

3 HOR.

├

TVG Level (0.0 to 10.0; default: 4.0)

├

TVG Distance (0.0 to 10.0; default: 4.0)

├

Gain ADJ. (-10 to +10; default: 0)

├

RES. Color (LOG, Linear, Square, Cube)

├

Clutter (0, 1, 2, 3)

├

Tracking Key (Position, Echo, Reverse)

├

Tracking Mode (Auto , Manual)

├

Auto Tilt (Off, ±2º, ±4º, ±6º, ±10º)

└

A-Scope (Off, On)

4 VERT

├

TVG Level (0.0 to 10.0; default: 4.0)

├

TVG Distance (0.0 to 10.0; default: 4.0)

├

Gain ADJ. (-10 to +10; default: 0)

├

RES. Color (LOG, Linear, Square, Cube)

├

Clutter (0, 1, 2, 3)

└

HOR. Range (×1, ×2)

AP-1

APPENDIX 1 MENU TREE

5 ES

├

TVG Level (0.0 to 10.0; default: 4.0)

├

TVG Distance (0.0 to 10.0; default: 4.0)

├

Gain ADJ. (-10 to +10; default: 0)

├

RES. Color (LOG, Linear, Square, Cube)

├

Clutter (0, 1, 2, 3)

└

A-Scope (Off, On)

6 FUNC Key

├

Key1 (Preset Key)

├

Key2 (VERT Search, Delete Mark)

└

Key3 (VERT Search, Delete Mark)

7 System

├

System Setting

│ ├

System Setting 1

│ │ ├

Positon Display (Ship's L/L , Cursor L/L)

│ │ ├

Track (Off, On)

│ │ ├

Current Data (Off, Inbound, Outbound)

│ │ ├

Heading Indication (True , Azimuth)

│ │ ├

Display Range Ring (Off, On )

│ │ ├

North Mark (Off, On)

│ │ ├

CSE. Data (Nav., Gyro)

│ │ ├

Nav. Data (GPS, Other)

│ │ ├

NMEA1 Baudrate (4800, 9600, 19200, 38400)

│ │ ├

NMEA2 Baudrate (4800, 9600, 19200, 38400)

│ │ ├

TVG Correction (Off, 1/2, 1/1)

│ │ ├

Units (m, ft, fm, HR, pb)

│ │ ├

Temp Display (ºC , ºF)

│ │ ├

Temp Graph (Off, 20min, 60min)

│ │ └

TLL Output (Off, On)

│ └

System Setting 2

│ ├

Gain Setting Protect (Off , On)

│ ├

Emphasis Mode (Off, Normal , Red)

│ ├

Stabilizer (Off, On(Std.), On(Gyro))

│ ├

Auto Retract (Off, 5 to 15; default: Off)

│ ├

Speed Alarm Message (Off, On )

│ ├

Sweep Indicator (Dot, Line )

│ ├

Menu BKGD. Transp. (Off, 1 to 5; default:5 )

│ ├

FUNC Key1 (Preset Key, Short-Cut Key )

│ ├

FUNC Key2 (Preset Key, Short-Cut Key)

│ ├

FUNC Key3 (Preset Key, Short-Cut Key)

│ └

Default Settings (No , Yes)

│

(Continued on next page)

AP-2

APPENDIX 1 MENU TREE

├

Range Settings

│ ├

HOR. (All defaults shown below)

│ │

m: 10, 20, 40, 60, 80, 120, 160, 200, 250, 300, 400, 500, 600, 800, 1000

│ │

ft: 40, 80, 120, 200, 300, 400, 500, 600, 700, 800, 1000, 1500, 2000, 2500, 3500

│ │

fm: 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400, 500

│ │

HR: 10, 20, 40, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400, 500, 700

│ │

pb: 10, 20, 40, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400, 500, 700

│ ├

VERT (All defaults shown below)

│ │

m: 10, 20, 30, 40, 60, 80, 100, 120, 160, 200, 250, 300, 400, 500, 600

│ │

ft: 30, 60, 90, 120, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 1500, 2000

│ │

fm: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

│ │

HR: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

│ │

pb: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

│ └

ES (All defaults shown below)

│

m: 10, 20, 30, 40, 60, 80, 100, 120, 160, 200, 250, 300, 400, 500, 600

│

ft: 30, 60, 90, 120, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 1500, 2000

│

fm: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

│

HR: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

│

pb: 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 200, 250, 300, 400

├

Train Speed Setting

│ ├

6º (Off, On)

│ ├

12º (Off, On)

│ ├

15º (Off, On)

│ ├

18º (Off, On)

│ ├

21º (Off, On)

│ └

24º (Off, On)

├

Color Settings (Opens Color Palette)

├│├

System Backup (No , Internal)

├

Load Backup Data (No , Load Internal Data)

├

Preset Backup (No , Internal)

├

Load Preset Data (No , Load Internal Data)

├

Draught Offset

│ ├

Draught (0.0 m to 60.0 m; default: 0.0 m )

│ └

Hull Unit Stroke (0 mm to 400 mm; default 400 mm )

├

TX Frequency Offset

│ └

FREQ. Shift (Range and default dependent on transducer)

├

Audio

│ ├

Audio FREQ. (0.90 kHz to 1.20 kHz; default: 1.00 kHz )

│ ├

Bandwidth (Wide, Std., Narrow)

│ ├

Harmonic Pattern (1 , 2, 3)

│ └

Auto Filter (Off , On)

├

Tests (Starts diagnostic test)

├

Test Pattern (Starts LCD test)

├

NMEA Port Monitor (Starts port monitor)

├

Simulation

│ └

Simulation Mode (No , Load Internal Data)

└

Restore Initial Settings (No, Yes)

(Continued from previous page)

Language Settings (Japanese, English, Thai, Vietnamese, Chinese, Spanish, Indonesian,
Malay, Burmese, French, Norwegian, Italian)

AP-3

APPENDIX 1 MENU TREE

CH-600

Bold Italic: Default

1 COM1

├

TX Power (High, Low)

├

TX Pulselength (Long, Short)

├

TX Rate (EXT., 1 to 10; default: 10 )

├

Interference LF (Off , On)

├

Interference HF (Off , On)

├

AGC-LF (0, 1, 2, 3, 4, 5)

├

AGC-HF (0, 1, 2, 3, 4, 5)

├

Auto Filter-LF (Wide, Std. , Narrow)

├

Auto Filter-HF (Wide, Std. , Narrow)

├

Reverberation (Off, On)

└

Volume (0.0 to 10.0, default: 0.0)

2 COM2

├

Delete Track (No , Yes)

├

Mix Mode (Std., Compress)

├

White Marker (Off, 1 to 31; default: Off)

├

Erase Color (Off, 1 to 30; default: Off)

├

Echo Colors (32, 16, 8)

├

BKGD. Colors (1, 2, 3)

├

Bearing (Relative, True)

├

Heading (-180 to +179º; default: +0º)

├

Roll Offset (-10.0 to +10.0; default: +0.0º)

├

Pitch Offset (-10.0 to +10.0; default: +0.0º)

└

Sensor Correct (-180 to +179º; default: +0º)

3 HOR.

├

TVG Level-LF (0.0 to 10.0; default: 4.0)

├

TVG Level-HF (0.0 to 10.0; default: 4.0)

├

TVG Distance-LF (0.0 to 10.0; default: 4.0)

├

TVG Distance-HF (0.0 to 10.0; default: 4.0)

├

Gain ADJ.-LF (-10 to +10; default: 0)

├

Gain ADJ.-HF (-10 to +10; default: 0)

├

RES. Color-LF (LOG, Linear, Square, Cube)

├

RES. Color-HF (LOG, Linear, Square, Cube)

├

Clutter-LF (0, 1, 2, 3)

├

Clutter-HF (0, 1, 2, 3)

├

Tracking Key (Position, Echo, Reverse)

├

Tracking Mode (Auto , Manual)

├

Auto Tilt (Off, ±2º, ±4º, ±6º, ±10º)

└

A-Scope (Off, On)

4 VERT

├

TVG Level-LF (0.0 to 10.0; default: 4.0)

├

TVG Level-HF (0.0 to 10.0; default: 4.0)

├

TVG Distance-LF (0.0 to 10.0; default: 4.0)

├

TVG Distance-HF (0.0 to 10.0; default: 4.0)

├

Gain ADJ.-LF (-10 to +10; default: 0)

├

Gain ADJ.-HF (-10 to +10; default: 0)

├

RES. Color-LF (LOG, Linear, Square, Cube)

├

RES. Color-HF (LOG, Linear, Square, Cube)

├

Clutter-LF (0, 1, 2, 3)

├

Clutter-HF (0, 1, 2, 3)

└

HOR. Range (×1, ×2)

(Continued on next page)

AP-4