Furuno CH-270 User Manual

OPERATOR'S MANUAL

Back

COLOR LCD

SEARCHLIGHT SONAR

MODEL

CH-270

www.furuno.co.jp

Thepaperusedinthismanual

9‑52Ashihara‑cho,

Fax:

A:JUN

2003

.

D:JUN.03,2010

Pub.No.

(

)

*

00014699513

**00014699513

*

Nishinomiya,662‑8580,JAPAN

Telephone: +81‑(0)798‑65‑2111

+81‑(0)798‑65‑4200

iselementalchlorinefree.

・FURUNOAuthorizedDistributor/Dealer

Allrightsreserved.

DAMI

CH‑270

PrintedinJapan

OME‑13220‑D

*00014699513**00014699513*

*00014699513*

IMPORTANT NOTICES

• This manual is intended for use by native speakers of English.

• No part of this manual may be copied or reproduced without written permission.

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

• The contents of this manual and equipment specifications are subject to change without

notice.

• The example screens (or illustrations) shown in this manual may not match the screens

you see on your display. The screen you see depends on your system configuration and
equipment settings.

• Store this manual in a convenient place for future reference.

• FURUNO will assume no responsibility for the damage caused by improper use or

modification of the equipment (including software) by an unauthorized agent or a third
party.

• When it is time to discard this product it must be done according to local regulations for

disposal of industrial waste. For disposal in the USA, refer to the Electronics Industries
Alliance (http://www.eiae.org/).

i

SAFETY INSTRUCTIONS

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel
should work inside the
equipment.

Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.

Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.

Do not disassemble or modify the
equipment.

Fire, electrical shock or serious injury can
result.

Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.

WARNING

Keep heater away from equipment.

A heater can melt the equipment's power
cord, which can cause fire or electrical
shock.

Use the proper fuse.

The fuse in the hull and transceiver units
protects them from overcurrent, equipment
fault and reverse polarity of the ship's
mains. If a fuse blows replace it with fuse of
the same amperage. Use of a fuse of
different amperage can result in damage
to the equipment.

Retract the transducer before turning
off the power.

Damage to the transducer may result
unless it is retracted.

↑

Wait until the transducer switch [
steadily and then turn off the power.

] lights

Continued use can cause fatal damage to
the equipment. Contact a FURUNO agent
for service.

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

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

ii

CAUTION

CAUTION

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

The transducer shaft may become
damaged.

Do not use the equipment for other
than its intended purpose.

Wrongful use of the equipment may result
in personal injury or damage to the
equipment.

WARNING LABELS

Warning labels are attached to the
display, transceiver and hull units. Do
not remove the labels. If a label is
missing or illegible, contact a FURUNO
agent or dealer.

WARNING

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

Name: Warning Label (1)
Type: 86-003-1011-0
Code No.: 100-236-230

DISPLAY UNIT,
TRANSCEIVER
UNIT

WORKING WITH THE SONAR OIL

Precautions

Q



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

The oil can cause inflammation of the

eyes.

Q



Do not touch the oil. Wear protective
gloves when working with the oil. The
oil can cause inflammation of the skin.

Q



Do not ingest the oil. Diarrhea and
vomiting may result.

Q



Keep the oil out of reach of children.

Emergency procedures

Q



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

Q



If the oil is ingested, see a physician

immediately.

Q



If the oil contacts skin, wash with soap

and water.

Disposal of oil and its container

Dispose of oil and its container in accord­ance with local regulations. For further
details, contact place of purchase.

Storage

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

WARNING

Moving shaft can pinch and cut.
Keep hands clear while operating.
Lockout power before servicing.

Name: "Finger Catch"
Warning Label
Type: 06-021-4015-0
Code No.: 100-281-590

HULL UNIT

TFT LCD

The high quality TFT (Thin Film Transistor)
LCD displays 99.99% of its picture ele­ments. The remaining 0.01% may drop out
or light, however this is an inherent property
of the LCD; it is not a sign of malfunction.

iii

TABLE OF CONTENTS

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

SYSTEM CONFIGURATION

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

1.1 Control Description.................................................................................................... 1-1

1.2 Remote Controller..................................................................................................... 1-2

1.3 Turning the Power On/Off.......................................................................................... 1-3

1.3.1 Power on ........................................................................................................ 1-3

1.3.2 Power off ........................................................................................................ 1-4

1.4 Raising, Lowering the Transducer............................................................................. 1-5

1.4.1 Lowering the transducer ................................................................................. 1-5

1.4.2 Raising the transducer.................................................................................... 1-5

1.5 Choosing a Display ................................................................................................... 1-6

1.6 Adjusting Screen Brilliance, Panel Dimmer................................................................ 1-7

1.7 Adjusting the Gain..................................................................................................... 1-7

1.8 Basic Menu Operation............................................................................................... 1-8

............................................................................................ ix

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

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

2.2 Typical Horizontal Mode Display ............................................................................... 2-2

2.3 Choosing the Range.................................................................................................. 2-3

2.4 Choosing Sector Width.............................................................................................. 2-4

2.5 Choosing Train Center .............................................................................................. 2-5

2.6 Choosing the Tilt Angle ............................................................................................. 2-6

2.6.1 Choosing the tilt angle .................................................................................... 2-6

2.6.2 Relation between tilt angle and echo .............................................................. 2-7

2.6.3 Tilt angle for surface fish................................................................................. 2-8

2.6.4 Suitable tilt angle ............................................................................................ 2-9

2.7 Choosing the Training Speed ...................................................................................2-10

2.8 Finding Echo Position with the Cursor......................................................................2-10

2.9 Event Marker............................................................................................................2-11

2.9.1 Inscribing the event marker............................................................................2-11

2.9.2 Deleting all event markers..............................................................................2-12

2.10 Depth and Horizontal Range Markers.......................................................................2-12

2.11 Adjusting the Picture ................................................................................................2-13

2.11.1 Suppressing bottom and surface reflections ..................................................2-13

2.11.2 Suppressing bottom tail .................................................................................2-14

2.11.3 Displaying weak echoes clearly ....................................................................2-14

2.11.4 Erasing weak echoes.....................................................................................2-17

2.11.5 Enlarging fish echoes (horizontal expansion display).....................................2-18

2.12 Target Lock ..............................................................................................................2-19

2.12.1 Choosing target lock mode ............................................................................2-19

2.12.2 Manual reverse mode ....................................................................................2-19

2.12.3 Position mode ................................................................................................2-20

2.12.4 Echo mode ....................................................................................................2-21

iv

TABLE OF CONTENTS

2.13 Horizontal Menu Overview....................................................................................... 2-23

2.14 Interpreting the Horizontal Display ........................................................................... 2-25

2.14.1 How the horizontal mode picture is painted................................................... 2-25

2.14.2 Sample echo displays ................................................................................... 2-26

2.14.3 Combination display examples...................................................................... 2-30

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

3.1 Operational Overview ................................................................................................ 3-1

3.2 Displaying Vertical Scan Mode Display...................................................................... 3-2

3.2.1 Typical vertical scan mode display .................................................................. 3-2

3.2.2 How the vertical scan picture is painted........................................................... 3-3

3.2.3 Horizontal/vertical scan display ....................................................................... 3-4

3.3 Choosing the Range .................................................................................................. 3-6

3.4 Choosing Train Center............................................................................................... 3-6

3.5 Choosing Display Sector............................................................................................ 3-7

3.6 Choosing Sector Center............................................................................................. 3-8

3.7 Choosing the Tilt Speed.............................................................................................3-9

3.8 Finding Echo Position with the Cursor ....................................................................... 3-9

3.9 Event Marker ........................................................................................................... 3-10

3.9.1 Entering an event marker.............................................................................. 3-10

3.9.2 Deleting all event markers ............................................................................. 3-11

3.10 Depth and Horizontal Range Markers...................................................................... 3-11

3.11 Adjusting the Picture................................................................................................ 3-12

3.11.1 Displaying weak echoes clearly..................................................................... 3-12

3.11.2 Suppressing noise and interference ..............................................................3-14

3.11.3 Gain adjustment ............................................................................................ 3-14

3.11.4 Resolution color ............................................................................................ 3-15

3.11.5 Suppressing clutter........................................................................................ 3-15

3.11.6 Choosing horizontal range expansion factor.................................................. 3-16

3.12 Interpreting the Vertical Scan Display ...................................................................... 3-17

3.12.1 Sample echo displays ................................................................................... 3-17

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

4.1 Operational Overview ................................................................................................ 4-1

4.2 Typical Echo Sounder Display ................................................................................... 4-2

4.3 Choosing the Range .................................................................................................. 4-3

4.4 Train Direction ........................................................................................................... 4-4

4.5 Choosing Tilt Angle.................................................................................................... 4-4

4.6 Choosing Picture Advance Speed ............................................................................. 4-4

4.7 Measuring Range by Cursor...................................................................................... 4-5

4.8 Event Marker ............................................................................................................. 4-5

4.8.1 Inscribing the event marker ............................................................................. 4-6

4.8.2 Deleting all event markers ............................................................................... 4-6

4.9 Range Marker............................................................................................................ 4-7

4.10 Adjusting the Picture.................................................................................................. 4-8

4.10.1 Displaying weak echoes clearly....................................................................... 4-8

4.10.2 Finding echo strength (A-scope display)........................................................ 4-10

4.10.3 Gain adjustment ............................................................................................ 4-11

v

TABLE OF CONTENTS

4.10.4 Resolution color .............................................................................................4-11

4.10.5 Suppressing clutter ........................................................................................4-12

5. MENU OPERATION .................................................................................................... 5-1

5.1 COM1 Menu.............................................................................................................. 5-1

5.1.1 Displaying the COM1 menu ............................................................................ 5-1

5.1.2 COM1 menu description ................................................................................. 5-1

5.2 COM2 Menu.............................................................................................................. 5-2

5.2.1 Displaying the COM2 menu ............................................................................ 5-2

5.2.2 COM2 menu description ................................................................................. 5-2

5.3 Short-cut Menu, Preset Menu.................................................................................... 5-3

5.3.1 Choosing short-cut or preset........................................................................... 5-3

5.3.2 Changing setting of preset key........................................................................ 5-5

5.3.3 Changing setting of short-cut key.................................................................... 5-6

5.4 SYSTEM Menu ......................................................................................................... 5-8

5.4.1 Displaying the SYSTEM menu........................................................................ 5-8

5.4.2 SYSTEM SETTING 1 menu description.......................................................... 5-9

5.4.3 SYSTEM SETTING 2 menu description.........................................................5-11

5.4.4 Sonar (horizontal) mode range settings .........................................................5-13

5.4.5 Vertical scan mode range settings .................................................................5-14

5.4.6 Echo sounder mode range settings................................................................5-15

5.4.7 Track range settings ......................................................................................5-16

5.4.8 Color palette ..................................................................................................5-17

5.4.9 Language.......................................................................................................5-18

5.4.10 System backup ..............................................................................................5-18

5.4.11 Loading backup data......................................................................................5-18

5.4.12 Transducer frequency adjustment..................................................................5-19

5.4.13 Demonstration mode......................................................................................5-19

5.4.14 Restoring all default settings..........................................................................5-20

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

6.1 Preventive Maintenance............................................................................................ 6-1

6.2 Cleaning the Equipment............................................................................................ 6-1

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

6.3.1 Lubrication...................................................................................................... 6-2

6.3.2 Manually raising, lowering transducer............................................................. 6-2

6.4 Transducer Maintenance........................................................................................... 6-3

6.5 Fuse Replacement .................................................................................................... 6-3

6.6 Troubleshooting ........................................................................................................ 6-4

6.7 Error Messages......................................................................................................... 6-5

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

6.9 Test Pattern............................................................................................................... 6-8

MENU TREE .................................................................................................................... M-1

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

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

vi

FOREWORD

Thank you for purchasing the CH-270 Color LCD Searchlight Sonar. We are confident you
will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manufacture of marine electronics equipment for more than
half a century, FURUNO Electric Company has gained an unrivaled reputation as a world
leader in the industry. This is the result of our technical excellence as well as our worldwide
distribution and service network.

Please carefully read and follow the safety information and operating and maintenance
instructions set forth in this manual before attempting to operate the equipment and conduct
any maintenance. Your sonar will perform to the utmost of its ability only if it is operated and
maintained in accordance with the correct procedures.

Features

The CH-270 displays underwater objects on a bright 10.4-inch color LCD display, in 8 (or

16) colors according to received echo strengths. Alternatively, the interface unit permits
connection of a commercial CRT or LCD monitor to act as the main, backup or remote
display. Operating frequency is 180 kHz.

The main features of the CH-270 are

• High definition active matrix color LCD.

• Target lock on a fish school or stationary position (reef, etc.).

• Audible detection of echoes frees the operator from continuous watch of the display.

• Compact display and hull units permit installation where space is limited.

• Interface IF-8000 permits use of a commercial monitor in lieu of FURUNO-supplied

display unit.

• Automatic pulselength switching for optimum performance in short and long ranges.

• Eight operational modes: Horizontal, Horizontal Expansion, Vertical Scan, Echo Sounder,

Horizontal/Vertical Scan, Horizontal/History, Horizontal/Video Plotter and
Horizontal/Strata.

• Automatic retraction of transducer at operator-chosen ship’s speed between 5 and 15

knots.

• CUSTOM MODE keys provide one-touch setup of the equipment or short-cut key

function.

• Tracing of ship’s track with connection of position-fixing equipment (GPS, etc.).

• One of the echo strengths may be displayed in white to enhance the specific echo level.

• The “Vertical Search” feature provides a cross-sectional view of the vertical plane, which

is useful for evaluating fish school concentration.

vii

FOREWORD

Usage Precautions

• The Motion Sensor MS-100 compensates for ship’s pitching and rolling. However, it does

not compensate for load unbalance. Use Clinometer BS-704 if compensation for load
unbalance is required.

• If the equipment will not be used for a long time, shut off the power to it 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 “MIN(imum),” on the COM1 menu. Damage to the train/tilt assy. may result if the
transducer is operated with maximum transmitter power when the ship is dry-docked.

• When the ship is dry-docked check the soundome for signs of electrolytic corrosion. Find

the reason for the corrosion and attach a zinc plate to the location as an anticorrosion
measure.

viii

SYSTEM CONFIGURATION

CH-270 (350 stroke)

INTERFACE UNIT
IF-8000

DISPLAY UNIT MU-100C

Navigator

Control Unit

Display
Unit

External
Monitor

Remote
Controller

XDR

GAIN

POWER

SECTOR TRAIN

DISPLAY MODE

RANGE

TILT

FULL

MAIN

FAST

BRILL

TARGET

HALF

SUB

SCAN

CUSTOM MODE

MENU

R/B

EVENT

HULL UNIT

SPEAKER

DATA/VIDEO OUT

MOTION SENSOR

12-32VDC

Speaker

Motion Sensor

Note 1: The CH-270 is supplied
with or without a display
unit. For connection of
locally supplied monitor, an
interface unit is provided.
The drawing above shows
the system configuration
with the MU-100C.

Note 2: For use of a locally
supplied monitor, connect
it and control unit to the
interface unit.

How to remove the hard cover
(system with locally supplied monitor only)

Place your thumbs at the locations shown with
circles in the illustration at right, and then lift the
cover while pressing it with your thumbs.

CONTROL UNIT CH-252

TRANSCEIVER UNIT
CH-273

12-32 VDC

12/24 VDC

HULL UNIT

CH-181

: Standard
: Option
: Local Supply

ix

SYSTEM CONFIGURATION

CH-270 (250 stroke)

DIsplay Unit

External
Monitor

INTERFACE UNIT
IF-8000

Navigator

Control Unit

Remote
Controller

DISPLAY UNIT MU-100C

XDR

GAIN

POWER

SECTOR TRAIN

DISPLAY MODE

RANGE

TILT

FULL

MAIN

FAST

BRILL

HALF

SUB

CUSTOM MODE

TARGET

SCAN

CONTROL UNIT CH-252

MENU

R/B

EVENT

HULL UNIT

SPEAKER

DATA/VIDEO OUT

MOTION SENSOR

Speaker

Motion Sensor

Note 1: The CH-270 is supplied
with or without a display
unit. For connection of
locally supplied monitor, an
interface unit is provided.
The drawing above shows
the system configuration
with the MU-100C.

Note 2: For use of a locally
supplied monitor, connect
it and control unit to the
interface unit.

12-32VDC

12-32 VDC

TRANSCEIVER UNIT
CH-273

CONTROL BOX

12/24 VDC

HULL UNIT

CH-184

: Standard
: Option
: Local Supply

x

1. OPERATIONAL OVERVIEW

1.1 Control Description

Chooses center bearing of training sector.

Chooses detection range.

Switches training sector between 180° and 360°.

Turns the power on/off.

Raises the transducer.

Adjusts receiver
sensitivity.

Chooses width of
training sector.

(horizontal mode), or 180

Chooses scan speed (sonar)/picture
advancement speed (echo sounder).

=

Controls tilt angle.

=

Selects center direction of

the vertical scanning sector.

Turns target lock on/off.

°

(vertical scan mode).

Omnipad

=

Shifts cursor.

=

Selects menu items, options.

XDR

POWER

Lowers the transducer.

GAIN

SECTOR TRAIN

DISPLAYMODE

Choose display mode.

Horizontal/Video Plotter

Horizontal/History

MAIN

SUB

RANGE

FULL
HALF

CUSTOM MODE

FAST

SCAN

TILT

BRILL

Provide short-cut
key or one-touch
setup.

Adjusts display
brilliance* and
panel dimmer.

Swithes control between
main and sub windows in
combination displays.
Sub window is circumbscribed
with a red rectangle when it
is selected.

Horizontal/Vertical Scan

Horizontal/Strata

TARGET

MENU

R/B

EVENT

Opens/closes
menu.

Inscribes/erases event
marker.

Inscribes/erases range
and bearing markers.

* FURUNO

monitor
only.

DISPLAYMODE

Horizontal

Horizontal Expansion

Echo Sounder

Vertical Scan

Control unit

1-1

1. OPERATIONAL OVERVIEW

1.2 Remote Controller

The Remote Controller CH-256 (option) provides armchair control over range, tilt, target
lock and training range.

Choose display
range.

Chooses training range.
for full circle 360° (horizontal mode)
or half circle 180° (vertical scan mode).

Choose tilt angle.

Enables/disables
target lock.

Remote controller

Note: The remote controller can also be used with a commercial monitor.

1-2

1. OPERATIONAL OVERVIEW

1.3 Turning the Power On/Off

1.3.1 Power on

Press the [POWER] switch on the control unit until you hear a “click.” A beep sounds, the
lamp above the switch lights and the startup display appears (for four seconds).

MODEL : CH-270 180kHz

Startup display

Note 1: Wait at least five seconds before reapplying the power.

Note 2: The first time the power is applied after installation, the language selection screen

appears. English is selected; press the [MENU] key to erase the screen and
continue.

Please set language.
([p/q]: Select, [MENU]: Enter)

XXXX ... For Japanese Customer
XXXX

English

(Japanese)

Language selection screen

Note 3: The example screens shown in this manual may not match the screens you see on

your display. The screen you see depends on your system configuration and
equipment settings.

1-3

1. OPERATIONAL OVERVIEW

1.3.2 Power off

1. Press the [©] switch on the control unit. The lamp above the switch blinks while the

transducer is being raised and lights steadily when it is fully raised.

30

25

Transducer status indicator

• Up arrow is filled when transducer
has been retracted into the tank.

• Down arrow is filled when transducer
has been fully lowered.

• Appropriate arrow flashes during
raising/lowering of transducer.

NOTE: When the transducer is being
raised automatically (auto raise feature),
the arrows are filled and the up arrow
flashes. When the transducer has been
fully retracted, the up arrow lights
and the down arrow becomes hollow.

Transducer status indicator

2. Press the [POWER] switch after the lamp above the [©

] switch lights steadily.

Note 1: The transducer is automatically retracted into the tank if the [POWER] switch is

pressed before retracting the transducer. However, for safety purposes, make it a
habit to retract the transducer before turning off the power.

Note 2: After changing settings, wait at least one minute before turning off the equipment to

allow the equipment to memorize settings. This will enable the equipment to start
up with the last-used settings. No harm will result to the equipment if this is not
done.

Note 3: The hull unit remains powered when power is turned off at the control unit.

Therefore, if the sonar is not to be used for a long period turn it off at ship’s mains
switchboard.

1-4

1. OPERATIONAL OVERVIEW

1.4 Raising, Lowering the Transducer

1.4.1 Lowering the transducer

With the boat at the fishing ground, press the [ª] switch to lower the transducer. The lamp
above the switch blinks while the transducer is being lowered and lights when it is
completely lowered. The down arrow on the transducer status indicator is filled when the
transducer is completely lowered.

CAUTION

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

The transducer may become damaged.

1.4.2 Raising the transducer

Press the [©] switch to raise the transducer. The lamp above the switch blinks while the
transducer is being raised and lights steadily when it is fully raised. The up arrow of the
transducer status indicator is filled when the transducer is fully raised.

Note 1: With speed input, the transducer can be automatically raised when the ship’s speed

exceeds a speed between 5 and 15 knots. For further details about the automatic
retraction feature, see AUTO RETRACTION in paragraph 5.4.3.

Note 2: Audio and visual alarms may be released when ship speed goes higher than

allowed for a certain transducer operation. For further details, see SPEED ALARM
MESSAGE in paragraph 5.4.3.

1-5

1. OPERATIONAL OVERVIEW

1.5 Choosing a Display

This s onar has eight display modes and you may choose one with one of the DISPLAY
MODE keys. Refer to the chapter shown in the illustration for more information about each
mode.

Key

Picture

NAV

DATA

HORIZONTAL

This mode provides 360 degree coverage.
Useful for general search. (Chapter 2)

NAV

DATA

VERTICAL SCAN

Vertical section of underwater conditions
appears on the entire screen. (Chapter 3)

Key

Picture

NAV

DATA

HORIZONTAL EXPANSION

Zoomed horizontal picture appears over
the entire screen. (Chapter 2)

NAV

DATA

or

A-SCOPE

DISPLAY

Water temp/depth

ECHO SOUNDER

Using a fixed spot beam this display
shows fish echoes below or around the
vessel. (Chapter 4)

NAV DATA

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. (Chapter 2)

NAV DATA

HORIZONTAL/VERTICAL SCAN

The horizontal picture appears in the main
window; the vertical scan picture in the sub
window. Note that the vertical scan display
may be located below the horizontal
display, with both displays nearly equal
in size. (Chapter 3)

NAV DATA

HORIZONTAL/VIDEO PLOTTER
The horizontal picture appears in the main

window and the video plotter picture, which
traces ship's track, in the sub window.
(Chapter 2)

NAV DATA

HORIZONTAL/STRATA

The horizontal picture appears in the main
window; the strata picture in the sub window.
The strata picture shows bottom undulatons
in different colors. It is useful in bottom
trawling to avoid projections. (Chapter 2)

1-6

Display m odes

1. OPERATIONAL OVERVIEW

1.6 Adjusting Screen Brilliance, Panel Dimmer

Screen brilliance can be adjusted in nine levels and the panel dimmer (backlighting) in four.

1. Press the [BRILL] key to open the dialog box for screen brilliance and panel dimmer. Do
the next step within four seconds; otherwise the dialog box will be erased.

BRILL:3

DIMMER:3

Brilliance, panel dimmer dialog box

2. Operate ◄ or ► to adjust screen brilliance (0 is the lowest brilliance; 9 the highest). The

[BRILL] key may also be operated to adjust brilliance.

3. Operate ▲ or ▼ to adjust the panel dimmer (0 is the lowest level; 4 is the highest).

4. Press the [MENU] key to register settings and close the dialog box. Note that the dialog

box is automatically erased if there is no control operation within about four seconds.

Note: The brilliance of a commercial monitor cannot be adjusted with the [BRILL] key. Use

the associated control on the monitor.

1.7 Adjusting the Gain

The [GAIN] control adjusts the sensitivity of the receiver. Normally, the control is adjusted so
that the bottom echo is displayed in reddish-brown mixed with red. Initially set the gain
between “4” and “6” and then fine tune according to fishing ground, etc.

Too Low Proper

Too High

How to adjust the gain

1-7

1. OPERATIONAL OVERVIEW

1.8 Basic Menu Operation

The menu, consisting of seven menus, mostly contains items which once preset do not
require frequent adjustment. Below is the procedure for basic menu operation.

1. Press the [MENU] key to open the menu. The last-used menu is displayed. (In the
example below, the COM2 menu is shown.)

Note: Either PRESET or SHORT-CUT appears between ES and SYS at the top of the

menu depending on the setting of CUSTOM KEY on the SYSTEM SETTING 1
menu. For further details, see paragraph 5.3.

MENU

DELETING TRACK NO
WHITE MARKER OFF
SIG LEVEL OFF
COLOR 16
BKGD COLOR 2

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

Dialog box appears here when
a menu item is selected.

: CHANGE MENU: END

COM2 menu

2. To choose a menu, press ▲ to choose MENU at the top of the screen (if it is not already
chosen) and then press ◄ or ► to choose menu desired.

3. Press ▲ or ▼ to choose menu item desired. Menu help is provided at the bottom of the
screen.

4. Press ► to open the corresponding dialog box. The example below shows the dialog
box for DELETING TRACK in the COM2 menu.

DELETING TRACK

NO YES

Dialog box for deleting track

5. Press ◄ or ► to choose option desired. If input of numeric data is required, use ◄ or ►
to lower or raise the figure, respectively.

6. Press ▲ or ▼ to close the dialog box and return to the menu, or press the [MENU] key

to register your selection and close the menu.

1-8

2. HORIZONTAL MODE

2.1 Operational Overview

The figure below shows the typical horizont al mode operating sequence.

7.

1.

Turn on the power.

POWER

6(a).

9.

Adjust gain.

XDR

Set center bearing of train

sector.

Set scanning sector.

GAIN

SECTOR TRAIN

DISPLAYMODE

5.

Set range.

MAIN

SUB

RANGE

FULL
HALF

CUSTOM MODE

FAST
SCAN

8.

TILT

Set tilt angle.

BRILL

TARGET

R/B

11.

(ex. TVG) as required.

MENU

EVENT

Adjust menu settings

2.

Lower the

transducer.

4.

Select appropriate

horizontal mode.

6(b).

Select training sector for

full circle.

Control unit

10.

Measure range and

bearing to target with cursor.

3.

Adjust screen

brilliance.

2-1

2. HORIZONTAL MODE

2.2 Typical Horizontal Mode Display

Horizontal max. range

Range and bearing markers

Tilt angle indicator
(Indicates transducer tilt angle.)

30

Bottom
echo

Bearing

marker

Fish echo

ETA marker

Own ship
marker

Range
marker

Event
marker

Cursor

Demonstration
mode

Cursor data

16
13

B208

°

+

W

16

B234

°

(DEMO)

Sector marker

Train indicator

N

S

Tilt angle

Range

R 40 m
T 40

°

B7

Vertical max.

25

depth

Interference
rejector

30

25

34° 12. 343' N
134° 34. 213' W

CSE 357
SPD 9.9 kt

E

DEP 35 m
TMP 12.3°C

CUR 11.0°

CUR 11.0˚

2.0 kt

2.0 kt
GAIN 5.3

TVG LEVEL 4.0
DISTANCE 200 m

9

COLOR

8

°

Tilt angle

(See note
below.)

Transducer status indicator
Filled arrow: Respective
action completed
Blinking arrow: Action in
progress

Target lock indicator

Position in latitude*,

Depth marker

longitude*

°

Course*, speed*

Depth,
water temperature*

Tide direction*,
tide speed*

Gain setting
TVG level,

distance settings

Color bar

Event
marker
data

Ship's
track*

Current
vector*

Sweep indicator
(Shows train position
in horizontal mode.)

Range and bearing
markers data

N

W

E

S

sensor.

North marker*

Depth marker

When depth data is input from
external equipment, the depth
marker shifts according to depth
data. If the depth data is greater
than the horizontal range, the
depth marker disappears.

Typical horizontal mode dis play

With the tilt angle lowered, your ship is at the cent er of the screen. The bottom, which
appears in r eddish-brown c olor, i s dis played as a circle and f ish echoes appear wi thin the
circle.

* Requires appropriate

2-2

2. HORIZONTAL MODE

2.3 Choosing the Range

The [RANGE] control chooses the detection (display) range. Choose the range according
to either the fish species being searched or the depth desired. 15 ranges are available.

SEA SURFACE

SEA SURFACE

Range indicated
on the screen.

BOTTOM

BOTTOM

How to choose the range

Range indicated
on the screen.

Default horizontal mode range settings

Range No. Meters Feet

1 10 40
2 20 80
3 40 120
4 60 200
5 80 300
6 100 400
7 120 500
8 160 600
9 200 700
10 250 800
11 300 1000
12 400 1200
13 500 1500
14 600 2000
15 800 2500

Normally, the range is set so that the bottom is traced at the lower part of the screen (like
an echo sounder). Each time the [RANGE] control is operated the newly chosen range
briefly appears in large characters at the screen top. Range is always displayed at the top
right-hand corner of the screen.

Note 1: Unit of range measurement may be chosen from among meters, feet, fathoms,

passi/braza and Hiro (Japanese), with UNIT on the SYSTEM SETTING 1 menu.
For further details, see UNIT in paragraph 5.4.2.

Note 2: Ranges may be freely preset as desired. For further details, see paragraph 5.4.4.

2-3

2. HORIZONTAL MODE

2.4 Choosing Sector Width

Sector means the width of the transducer training. The [SECTOR] control chooses the
training (display) area among the sixteen positions shown in the table below. Clockwise
rotation of the control increases the sector width; counterclockwise rotation decreases it.

Display sector

96°

Display sector

(shown: 96°)

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

width
(°)

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

In the full-circle mode (360°) the direction of training is clockwise; in the half-circle mode
the direction is clockwise to counterclockwise alternately.

One-touch selection of 360°°°° sector

Each pressing of the [FULL/HALF] key alternately chooses 360° sector (full circle) or 168°
sector (half circle). If the [SECTOR] control is operated following the selection of the
full-circle display, the next pressing of the [FULL/HALF] key presents the full-circle display.

Sector set with
SECTOR control

FULL/HALF

key

Full circle

FULL/HALF

key

Half circle

168

°

2-4

How the FULL/HALF key works

2. HORIZONTAL MODE

2.5 Choosing Train Center

The [TRAIN] control chooses the center direction of the detection range. The range of
adjustment is 0° to 354° in increments of 6°. The chosen bearing is shown with a filled
circle, the train indicator, on the bearing scale.

0° (360°) → 6° → 12° → 18° → ... 354°

Train indicator

Sector

Train center

2-5

2. HORIZONTAL MODE

2.6 Choosing the Tilt Angle

2.6.1 Choosing the tilt angle

The tilt angle shows the direction to which the sound wave is emitted. When the sound
wave is emitted horizontally, the tilt angle is said to be 0° and when emitted vertically, 90°.
To set a tilt angle, operate the [TILT] control. Watch the tilt angle indication and the tilt
angle indicator at the top right corner of the screen. The tilt angle can be set in increments
of 1°, from +5° (upward) to 90° (downward). Automatic tilt selection is also available. See
AUTO TILT on page 2-24 for details.

Choose the tilt angle depending on target fish. For surface fish choose a small angle
(about 5°) to minimize sea surface reflections and for bottom fish, a large angle (about
40°) to search a wide area.

Soundome

+5

°

0°Horizontal direction

Transducer

90°Vertical direction

Sounding beam and tilt angle

Tilt angle setting range

2-6

2. HORIZONTAL MODE

2.6.2 Relation between tilt angle and echo

Refer to the illustration below to see the relation between tilt angle and bottom echo.

Case 1: Tilt angle 30°°°° to 40°:

captured by the full width of the beam.

Case 2: Tilt angle 10°°°° to 20°:

captured by the lower half of the beam.

Case 3: Tilt angle 0°°°° to 5°:

returning echo is weak.

The figure below illustrates how two fish schools “a” and “b” are displayed on the screen
using three different tilt angles.

Case 1(Tilt angle 30°°°° to 40
Case 2(Tilt angle 10°°°° to 20
Case 3(Tilt angle 0°°°° to 5

°: This tilt angle will display the entire bottom since it is

°: °:

°: This tilt angle will only display half the bottom since it is only

°: °:

°: This tilt angle may or may not capture the bottom since the

°: °:

°):

°): Fish school is obscured by the bottom.

°):°):

°):

°): Fish school is located above the bottom (midwater).

°):°):

°):

°): Fish school is located close to the bottom.

°):°):

Case 1

Fish school "a"

Bottom

Case 1

Case 2

Fish school "a"

Bottom

Fish echo and tilt angle

Case 2

Case 3

Fish school "a"

Bottom

Fish school "b"

Case 3

2-7

2. HORIZONTAL MODE

Points to consider

• Normally, a vertically distributed fish school is a better sonar target than the bottom,

because it reflects the transmitted pulse back toward the transducer.

• In case 3, both fish schools “a” and “b” are presented. Generally speaking, however,

midwater fish schools tend to be larger than bottom fish schools and they are often
displayed near the bottom on the display.

• It is difficult to detect bottom fish when they are not distributed vertically.

2.6.3 Tilt angle for surface fish

Sound emitted from the sonar transducer forms an oval-shaped beam with a width of
approximately 8° in the vertical direction (vertical beam width). The tilt angle is indicated
by the angle between the center line of the beam and the horizontal plane. Then, if the tilt
angle is set to 0°, the center line is parallel with the sea surface and one half of the
emitted sound goes upward, toward the sea surface.

This causes one half of the emitted sound to be reflected toward the transducer and
displayed on the screen as sea surface reflections. When the sea is calm, since the sound
is reflected just like a light hitting a mirror at a narrow incident angle, it propagates away
and the sea surface reflections become negligible.

However if the sea is not calm enough, they will become dominant and interfere with
observation of wanted echoes. To minimize these sea surface reflections and to search
fish schools effectively, the tilt angle is usually set between 5° and 6° so the upper portion
of the beam becomes almost parallel with the sea surface. When the sea is rough, the tilt
angle is slightly increased to lessen the affect of sea surface reflections.

Tilt angle 0°

Tilt angle 5-7°

Tilt angle

Sea surface

8°

Sea surface

8°

2-8

2. HORIZONTAL MODE

2.6.4 Suitable tilt angle

The figure below illustrates the relationship among tilt angle, depth and detection range.
Refer to it to find out the suitable tilt angle for a given depth/detection range.

Tilt angle and beam coverage (frequency 180 kHz, vertical beamwidth 8

20(40)

40(80)

60(120)

80(160)

100(200)

Depth (m)

200(400)

Vertical width of sonar beam

8°

100

(200)

100 m

14 m

200

(400)

200 m

28 m

300

(600)

300 m

42 m

° at -3 dB

400

(800)

)

Range (m)

0

°

5

°

10

°

15

°

Tilt angle and beam coverage

2-9

2. HORIZONTAL MODE

2.7 Choosing the Training Speed

The training speed determines how fast the transducer scans the sounding sector. Two
choices are available, normal speed and high speed, and one may be chosen with the
[FAST SCAN] key. Each time the key is pressed, “NORM” (normal speed) or “FAST” (high
speed) momentarily appears at the screen top.

Normal (6°): 60 transmissions required to complete the full 360° picture.
High (12°): 30 transmissions required to complete the full 360° picture.

The time required to train a full circle depends on range used and other factors. The table
below shows the time required to complete one full circle on each range.

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

Unit ft 40 80 120 200 300 400 500 600 700 800 1000 1200 1500 2000 2500

Time
required
(sec) for
one full
circle

Unit m 10 20 40 60 80 100 120 160 200 250 300 400 500 600 800

Time
required
(sec) for
one full
circle

Norm 11 11 11 11 11 11 13 15 17 20 25 30 37 49 61

Fast 11 11 11 11 11 11 12 14 15 16 19 21 25 31 37

Norm 11 11 11 11 11 11 11 14 17 21 25 33 41 49 65

Fast 11 11 11 11 11 11 11 13 14 16 18 22 26 30 38

Note 1: The above values are for reference purposes. The actual training speed may vary.

Note 2: The range setting must be at least 160 meters to activate high-speed training.

2.8 Finding Echo Position with the Cursor

The cursor measures horizontal range, depth and bearing. Operate the Omnipad to place
the cursor where desired. Cursor position data appears at the top left-hand corner on the
screen.

Cursor position data

®

: Horizontal range

¯

: Depth

B: Bearing

NAV

DATA

2-10

Cursor

Location of cursor position data