Furuno CH250 User Manual

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COLOR LCD SEARCHLIGHT SONAR

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CH-250

Page 2

PUB. No. OME-13160 CH- 250

( DAMI )

FIRST EDITION : MAR. 2000

9-52, Ashihara- cho, Nishinomiya, Japan

Telephone: 0798-65-2111 Telefax: 0798-65-4200

Printed in Japan

Your Local Agent/Dealer

K2 : OCT. 3, 2002

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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.

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 protect them from overvoltage, 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 wrong fuse can result in equipment damage.

Retract the transducer before turning off the power.

Damage to the equipment may result. Wait until the transducer switch [ steadily and then turn off the power.

↑

] lights

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

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

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

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

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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.

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

Use of the equipment as a stepping stool, for example, may result in personal injury or equipment damage.

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.

WARNING

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

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

DISPLAY UNIT, TRANSCEIVER UNIT

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

WORKING WITH THE SONAR OIL

Precautions



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

The oil can cause inflammation of the

eyes.



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



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



Keep the oil out of reach of children.

Emergency procedures



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



If the oil is ingested, see a physician

immediately.

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.

HULL UNIT

TFT LCD

The high quality TFT (Thin Film Transistor) LCD displays 99.999% 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.

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FOREWORD..............................................................................................v

SYSTEM CONFIGURATION....................................................................vii

1. OPERATIONAL OVERVIEW

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

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

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

1.4 Raising, Low ering the Transducer.............................................................................1-4

1.5 Adjusting Screen Brilliance, Panel Dimmer...............................................................1-5

1.6 Selecting a Display...................................................................................................1-6

1.7 Adjusting th e Gain ....................................................................................................1-7

1.8 Basic Menu Operation..............................................................................................1-7

2. HORIZONTAL MODE

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

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

2.3 Selecting th e Range .................................................................................................2-3

2.4 Selecting Sector Width..............................................................................................2-4

2.5 Selecting Train Ce n te r..............................................................................................2-5

2.6 Selectin g the Tilt Angle.............................................................................................2-5

2.7 Selecting the T rai ning Speed....................................................................................2-9

2.8 Finding Echo Position with the Cursor ......................................................................2-9

2.9 Event Marker..........................................................................................................2-10

2.10 Range and Bearing Markers.................................................................................. 2-11

2.11Adjusting the Picture...............................................................................................2-12

2.12 Target Lock............................................................................................................2-17

2.13 Horizontal Menu Overview.....................................................................................2-21

2.14 Interpreting the Horizontal Display.........................................................................2-23

3. VERTICAL FAN MODE

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

3.2 Typical Vertical Fan Mode Display............................................................................3-2

3.3 Selecting th e Range .................................................................................................3-3

3.4 Selecting Train Ce n te r..............................................................................................3-4

3.5 Selecting Display Sector...........................................................................................3-5

3.6 Selecting Sector Center............................................................................................3-6

3.7 Selecting the T rai ning Speed....................................................................................3-7

3.8 Finding Echo Position with the Cursor ......................................................................3-7

3.9 Event Marker............................................................................................................3-8

3.10 Depth and Horizontal Range Markers......................................................................3-9

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3.11Adjusting the Picture...............................................................................................3-10

3.12 Vertical Menu Overview.........................................................................................3-12

3.13 Interpreting the Vertical Fan Display ......................................................................3-13

4. ECHO SOUNDER MODE

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

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

4.3 Selecting th e Range .................................................................................................4-3

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

4.5 Selectin g Tilt Angl e...................................................................................................4-4

4.6 Selecting Picture Advance Speed.............................................................................4-4

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

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

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

4.10 Adjusting the Picture................................................................................................4-7

4.11Echo Sounder Menu Overview................................................................................4-10

5. MENU OPERATI O N

5.1 COMN Menu.............................................................................................................5-1

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

5.3 SYS Menu ................................................................................................................5-7

6. MAINTENANCE, TROUBLESHOOTING

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

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

6.3 Hull Unit Maintenance...............................................................................................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

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FOREWORD

Thank you for purchasing the CH-250 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 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-250 displays underwater objects on a bright 10.4” color LCD display, in 8 or 16 colors according to received echo strengths. Operating frequency is selectable among 60, 88 and 150 kHz. Eight operating modes provide information for virtually any fishing application.

The main features of the CH-250 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 instead of standard display unit.

•

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

•

Eight operational modes: Horizontal, Expanded Horizontal, Vertical Fan, Echo Sounder, Horizontal/Vertical Fan, History, Video Plotter and Strata.

•

Automatic retraction of transducer at operator-selected 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.

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Usage Precautions

•

The Motion Sensor MS-100 compensates for ship’s pitching and rolling. However, it does not compensate for load unbalance.

•

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 “minimum” on the COMN menu. Damage to the train-tilt section may result if it is operated with maximum transmitter power.

•

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 anticorrosion measure if necessary.

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SYSTEM CONFIGURATION

INTERFACE UNIT IF-8000

Note 2

MONITOR UNIT MU-100C

Navigator

Control Unit

Display Unit

VGA Ext. Monitor

TRANSCEIVER UNIT CH-253

HULL UNIT

SPEAKER

Speaker

DA T A/VIDEO OUT

Remote Controller CH-256

MOTION SENSOR

Motion Sensor

MS-100

12-32 VDC

Note 1

CONTROL UNIT CH-252

HULL UNIT CH-254 CH-255

12/24-32 VDC

Note 1: MU-100C is the standard supply

monitor unit. An external monitor may be connected via the interface unit (option). The drawing above shows the system configuration with the MU-100C. The monitor unit and control unit can be installed separately (optional mounting kit required).

Note 2: For blackbox type, MU-100C is

not supplied. Connect external monitor and control unit to the interface unit.

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This page is intentionally left blank .

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1. OPERATIONAL OVERVIEW

1.1 Control Description

Selects center bearing of training sector.

Selects detection range.

Switches training sector to 360˚ (horizontal mode), or 180˚ (vertical fan mode).

Turns the power on/off.

Raises the transducer.

XDR

POWER

Adjusts receiver sensitivity.

Selects width of training sector.

GAIN

SECTOR TRAIN

DISPLAYMODE

MAIN

SUB

RANGE

Selects scan speed/picture advancement speed.

Controls tilt angle.

Selects center direction of

the vertical scanning sector.

TILT

FULL

FAST SCAN

BRILL

HALF

CUSTOM MODE

Turns target lock on/off.

TARGET

Omnipad

Shifts cursor.

Selects menu items, options.

R/B

EVENT

Lowers the transducer.

Select display mode.

Horizontal/Video Plotter

Horizontal/History

Horizontal

Expanded Horizontal

Figure 1-1 Control unit

Provide short-cut key or one-touch setup.

Adjusts display brilliance.

Alternately selects main and sub windows in combination displays.

Horizontal/Vertical Fan

Horizontal/Strata

DISPLAYMODE

Echo Sounder

Vertical Fan

Opens/closes menu.

Inscribes/erases event marker.

Inscribes/erases range and bearing markers.

1-1

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1.2 Remote Controller

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

Select tilt angle.

Select display range.

Selects range of sounding for full circle 360˚ (horizontal mode) or half circle 180˚ (vertical fan mode).

Enables/disables target lock.

Figure 1-2 Remote controller

Note:

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

1-2

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1.3 Turning the Power On/Off

1.3.1 Power on

This sonar has a demonstration mode which lets the operator become acquainted with the features of the sonar, without connecting the transducer. For further details see page 5-18.

Press the [POWER] switch on the control unit till hear “click.” A beep sounds, the lamp above the switch lights and the last-used display appears.

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

1.3.2 Power off

1. Press the [↑] switch on the control panel. The lamp above the switch blinks while the transducer is being raised and lights steadily when it is fully raised.

2. Press the [POWER] switch after the [↑

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.

]

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, and start up with them at the next powering of the equipment. No harm will result to the equipment if this not done.

1-3

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1.4 Raising, Lowering the Transducer

1.4.1 Lowering the transducer

With the boat at the fishing ground, press the [↓] 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 of the transducer status indicator at the top right corner of the display 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 at the top right corner of the display is filled when the transducer is fully retracted.

Note 1:

Note 2:

With speed input, the transducer can be raised automatically when the ship’s speed exceeds a preset speed between 5 and 15 knots. If speed data is erroneous the transducer may be raised at a speed different from the preset speed. For further details about the automatic retraction feature, see AUTO RETRACTION on page 5-10.

An alarm may sound depending on ship’s speed. For details see page 5-11.

1-4

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1.5 Adjusting Screen Brilliance, Panel Dimmer

Screen brilliance can be adjusted in nine steps and 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

Figure 1-3 Brilliance, panel dimmer dialog box

2. Operate continuous pressing of the [BRILL] key also changes the brilliance level.

3. Operate

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 1:

Note 2:

The brilliance of a commercial monitor cannot be adjusted with the [BRILL] key. Use the associated control on the monitor.

For the supplied monitor unit, if you turn off the power with the brilliance set at minimum the screen will show nothing at next power-up. In this case press the [BRILL] key several times.

or to adjust screen brilliance (0 is the lowest brilliance; 9 the highest). Note that

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

1-5

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1.6 Selecting a Display

This sonar has eight display modes and you may select 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 FAN

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

Key

Picture

NAV

DATA

EXPANDED HORIZONTAL

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

NAV

DATA

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 FAN

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

Figure 1-4 Display modes

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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 depending on fishing ground, etc.

Too Low Proper

Too High

Figure 1-5 How to adjust the gain

1.8 Basic Menu Operation

The menu, consisting of six 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.

Note:

Either PRESET (default setting) or SHORT-CUT appears between ES and SYS at the top of the screen depending on the setting of CUSTOM KEY on the SYSTEM SETTING 1 menu, and they set the function of the custom keys [1], [2], [3]. For further details see pages 5-3 through 5-7.)

WHITE MARKER SIG LEVEL COLOR 16 BKGD COLOR 1 TX POWER HIGH PULSELENGTH LONG TX RATE 10 INT REJECT TRACK ON

COMN HORZ VERT ES PRESET SYS

OFF OFF

OFF

: SELECT

: CHANGE

MENU: END

Figure 1-6 COMN menu

1-7

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2. The last-used menu is displayed. (In Figure 1-6 the COMN (COMMON) menu is selected.) To select a different menu, press

or to select menu desired.

to select MENU at the top of the screen and then press

3. Press provided.

4. Press BKGD COLOR (to choose background color) in the COMN menu.

Figure 1-7 Dialog box for background color

5. Press or to lower or raise the figure, respectively.

6. Press close the menu.

or to select menu item desired. At the bottom of the screen menu help is

to open the corresponding dialog box. The example below shows the dialog box for

BKGD COLOR

1 2 3

or to select option desired. If the option requires selection of numeric data, use

or to return to the menu, or press the [MENU] key to register your selection and

1-8

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2. HORIZONTAL MODE

2.1 Operational Overview

The figure below shows the typical horizontal mode operating sequence.

Turn on the power.

6(a).

Adjust gain.

XDR

Set center bearing of train

sector.

Set scanning sector.

Set range.

Set tilt angle.

11.

Adjust menu settings

(ex. TVG) as required.

POWER

Lower the

transducer.

GAIN

Select appropriate

SECTOR TRAIN

DISPLAYMODE

horizontal mode.

6(b).

Select training sector for

full circle.

Figure 2-1 Control panel

MAIN SUB

RANGE

FULL

HALF

CUSTOM MODE

FAST

SCAN

TILT

BRILL

TARGET

R/B

EVENT

10.

Measure range and

bearing to target with cursor.

Adjust screen

brilliance.

2-1

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2.2 Typical Horizontal Mod e Display

* 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 shifts to lowest position.

Demonstration mode

Cursor data

Sector marker

Train indicator

Range and bearing markers

Tilt angle

Range

Horizontal max. range

Vertical max. depth

Interference rejector

Tilt angle indicator (Indicates transducer tilt angle.)

Tilt angle

Depth marker* (See note at left.)

Bottom echo

Bearing marker

Fish echo

ETA marker

Own ship marker

Range marker

Event marker

Cursor

Event marker data

13 B208˚ +

B234˚

(DEMO)

Ship's track*

Current vector*

R 40 m T 40˚

34˚ 12. 343' N 134˚ 34. 213' W

CSE 357˚ SPD 9.9 kt

DEP 35 m TMP 12.3˚C

CUR 11.0˚

2.0 kt GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m

COLOR

B7˚

Range and bearing markers data

CUR 11.0˚

2.0 kt

North marker*

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

Target lock indicator

Position in latitude*, longitude*

Course*, speed* Depth,

water temperature* Tide direction*,

tide speed* Gain setting

TVG level, distance settings

Color bar

* Requires appropriate sensor.

Figure 2-2 Typical horizontal mode display

With the tilt angle lowered, your ship is at the center, the bottom, which appears in reddish-brown color, is displayed as a circle and fish echoes appear within the circle.

2-2

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2.3 Selecting the Range

The [RANGE] control selects the detection (display) range. Select the range according to either the fish species being searched or the depth desired. 15 ranges are available and minimum and maximum ranges depend on the transducer used.

SEA SURFACE

Range indicated on the screen.

BOTTOM

Figure 2-3 How to select the range

Default horizontal mode range settings

Range indicated on the screen.

Range No.1 10 40 10 40 10 40

No.2 20 80 20 80 20 80 No.3 40 120 40 120 40 120 No.4 80 200 80 200 60 200 No.5 120 300 120 300 80 300 No.6 160 400 160 400 120 400 No.7 200 500 200 500 160 500 No.8 250 600 250 600 200 600 No.9 300 800 300 800 250 700 No.10 400 1000 400 1000 300 800 No.11 500 1500 500 1500 400 1000 No.12 600 2000 600 2000 500 1500 No.13 800 3000 800 2500 600 2000 No.14 1200 4000 1000 3500 800 2500 No.15 1600 5000 1200 4000 1000 3500

60 kHz 88 kHz 150 kHz

mftmftmft

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 selected range brie fly appears in large characters at the screen top. Range is always displayed at the right-hand corner of the screen.

Note 1:

Note 2:

Unit of range measurement may be selected for meters, feet, fathoms, passi/braza or Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page 5-

9. Ranges may be freely preset as desired. For details see page 5-13.

2-3

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2.4 Selecting Sector Width

Sector means the width of the transducer training.

Display sector

96°

Figure 2-4 Display sector

The [SECTOR] control selects 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.

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

)

(shown: 96˚)

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 selects 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

Figure 2-5 How the FULL/HALF key works

2-4

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2.5 Selecting Train Center

The [TRAIN] control se lects the center direction of th e detect ion range. The range of adjustmen t is 0° to 354° in increments of 6°. The selected bearing is shown with a filled circle, the train indicator, on the bearing scale.

0˚ (360˚) → 6˚ → 12˚ → 18˚ → ... 354˚

Train indicator

Sector

Figure 2-6 Train center

2.6 Selecting 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 tilt angle indicator at the top right corner of the screen. The tilt angle can be set in increments of 1°

from 0° to +5° (upward) to 0° to 90° (downward). Select tilt angle depending on target fish. For

surface fish select a narrow angle (about 5°) and for bottom fish, a wide angle (about 40°).

Sounding beam

Transducer

+5˚

0˚ Horizontal direction

Tilt angle setting range

90° Vertical direction

2-5

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2.6.1 Bottom echo and tilt angle

Refer to the illustration below.

Case 1: Tilt angle 30

This tilt angle will display the entire bottom since it is captured by the full width of the beam.

Case 2: Tilt angle 10

This tilt angle will only display half the bottom since it is only captured by the lower half of the beam.

Case 3: Tilt angle 0

This tilt angle may or may not capture the bottom since the returning echo is weak.

°°°°

to 5

°°°°

to 40

to 20

°°°°

2.6.2 How to discriminate fish echoes from the bottom

The figure at the bottom of this page illustrates how two fish schools “a” and “b” are displayed on the screen using three different tilt angles.

Case 1 (Tilt angle 30 Case 2 (Tilt angle 10

to 40

°°°°

to 20

°°°°

°)

Fish school is obscured by the bottom.

°)°)

°)

Fish school is located above the bottom (midwater).

°)°)

Case 3 (Tilt angle 0

Case 1

Fish school "a"

Bottom

Fish school "b"

to 5

°°°°

°)

Fish school is located close to the bottom.

°)°)

Case 2

Case 1

Fish school "a"

Bottom

Fish school "b"

Case 2

Case 3

Bottom

Fish school "b"

Fish school "a"

Case 3

2-6

Figure 2-7 Fish echo and tilt angle

Page 25

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 12° (for 6 0 kH z tra nsduce r at –3 dB) in th e vert ical d irection (ve rt ica l beam width). The tilt angle is indicated by the angle between 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 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 effec tive ly, the tilt angle is usua lly set be tw een 5 of the beam becomes alm ost parallel with the sea s urface. When the sea is rough , the t i lt angle is slightly increased to lessen the affect of sea surface reflections.

° and 6° so th e upp er po rt ion

Sea surface

Tilt angle 0°

12°

Sea surface

Tilt angle 5-7°

12°

Figure 2-8 T i lt angle

2-7

Page 26

2.6.4 Suitable tilt angle

The figure below illustrates the re lation ship among tilt angle, depth and detection range. Refer to it to find out the sui t able tilt angl e for a giv e n dep th/detec ti on ran g e.

Tilt angle and beam coverage (frequency 60 kHz, vertical beamwidth 12° at -3 dB)

20(40) 40(80)

60(120)

80(160)

100(200)

Depth (m)

200(400)

Vertical width of sonar beam

12°

100

(200)

100 m100 m

21 m

200

(400)

200 m

42 m

300

(600)

300 m

63 m

400

(800)

Range (m)

0°

5°

10°

15°

Figure 2-9 T i lt angle an d beam c overage

2-8

Page 27

2.7 Selecting the Training Speed

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

°)

NORM (6

: 60 transmissions required to complete full 360° picture (default setting).

FAST (12

°)

: 30 transmissions required to complete the full 360° picture.

The time necessary to train a full circle depends on range and transducer used. The table below shows the time required to complete one full circle in the horizontal mode using the 150 kHz transducer.

Ranges 1 2 3 4 56789101112131415

Unit

Time required (sec) for

one full

circle

Note 1:

Note 2:

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

Norm777 7 710131620243240 48 64 81

Fast 7 7 7 7 7 9 11 13 15 17 21 25 28 36 45

Above data for soundome having serial no. 1000 and higher.

The range setting must be at least 160 m to activate high speed training, using the 150

kHz transducer. The [FAST SCAN] key is inoperative when the range setting is less than 160 meters.

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

Cursor

Figure 2-10 Location of cursor position data

2-9

Page 28

2.9 Event Marker

The event marker functions to mark important locations on the screen, and five event markers

may be inscribed. Each time the [EVENT] key is pressed the “latest event marker” (

inscribed at the cursor location and all previously entered event markers are shown by the

“previous event marker” (+). When the capacity for event markers is reached the eldest event

marker is erased from the screen to make room for the latest.

⊕

) is

Note 1:

With position data the event marker moves with ship’s movement. The event marker can be inscribed without position data, however it will be stationary.

Note 2:

The event marker cannot be inscribed from the sub window (strata, history and video plotter displays). It can only be inscribed from the main window.

Note 3:

Event marker position can be output to external equipment and marked on the display of the external equipment. Each press of the [EVENT] key outputs event marker position. For details see EVENT MARK INFO on page 5-9.

2.9.1 Inscribing the event marker

1. Operate the Omnipad to place the cursor on the location desired for an event marker.

2. Press the [EVENT] key to inscribe the event marker. Event marker data appears at the bottom left-hand corner.

"Latest event marker"

Display area

"Previous event marker"

Figure 2-11 How to use the event marker

Event marker data →: Horizontal range B: Bearing

NAV

DATA

To delete all event markers, place the cursor outside the display area and press the [EVENT] key.

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2.9.2 Deleting all event markers

All event markers can be erased from the screen as follows:

1. Operate the Omnipad to place the cursor outside the display area.

2. Press the [EVENT] key to show the following dialog box. Do the next step within four seconds, otherwise the dialog box will be erased.

DELETE EVENT MARK?

YESNO

3. Press to select YES and press the [MENU] key. All event markers are erased from the screen.

2.10 Range and Bearing Markers

The horizontal range, depth and bearing to a fish school can be measured by using the range and bearing markers.

1. Operate the Omnipad to place the cursor on the location desired.

2. Press the [R/B] key to display the range and bearing markers. Horizontal range, depth and

bearing to the cursor location are shown at the bottom right-hand corner of the screen.

3. To erase the range and bearing markers, place the cursor outside the display area and press

the [R/B] key, or place the cursor on the range or bearing marker and press the [R/B] key.

NA V

Bearing marker

Range marker

Range and bearing markers data

→:Horizontal range ↓: Depth

B: Bearing from ship's bow

DATA

Figure 2-12 Range and bearing markers

2-11

Page 30

2.11 Adjusting the Picture

2.11.1 Suppressing bottom and surface reflections

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 reduced rather than when the gain is decreased.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU and then press to select the COMN menu.

WHITE MARKER SIG LEVEL COLOR 16 BKGD COLOR 1 TX POWER HIGH PULSELENGTH LONG TX RATE 10 INT REJECT TRACK ON

: SELECT

COMN HORZ VERT ES PRESET SYS

OFF OFF

OFF

: CHANGE

MENU: END

Figure 2-13 COMMON menu

or to select TX POWER and press . The following dialog box appears.

TX POWER

MAX MIN

4. Press to select MIN. (For long range detection be sure to return the setting to MAX.)

5. Press the [MENU] key to register your selection and close the menu.

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2.11.2 Suppressing bottom tail

As described earlier, fish schools near the bottom are sometimes difficult to detect because you have to discriminate fish echoes from the bottom reflections. To discriminate fish echoes near the bottom, select the short Tx pulselength on the COMN menu to decrease the tail of bottom reflections.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

PULSELENGTH LONG SHORT

to select MENU and then press to select the COMN menu. or to select PULSELENGTH and press . The following dialog box appears.

4. Press to select SHORT.

5. Press the [MENU] key to register your selection and close the menu.

2.11.3 Displaying weak echoes clearly

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. The sonar operator will be quite inconvenienced if these echoes are directly displayed on the screen, since he won’t be able to judge the actual size of the target from the size of echoes displayed on the screen. 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 irrespectiv e of th e ranges to them.

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

Proper TVG setting

Echoes of equal size targets are presented in the same color and size. Noise is rejected.

Noise caused by strong reflection of surface turbulence.

Without TVG

Nearer target echoes appear in larger size.

Reduce gain for nearby areas, using TVG.

Figure 2-14 How TVG works

Note:

Excessive TVG may eliminate short-range echoes.

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To adjust TVG:

1. Press the [MENU] key to open the menu.

2. Press

4. Press

to select MENU and then press or to select HORZ.

TVG LEVEL TVG DISTANCE GAIN ADJUST 0 RES. COLOR LOG AGC OFF TARGET KEY REVERSE LOCK MODE AUTO AUTO TILT AUDIO LEVEL 0

: SELECT

COMN HORZ VERT ES PRESET SYS

4.0

OFF

: CHANGE

MENU: END

Figure 2-15 HORZ menu

or to select TVG DISTANCE and press . The following dialog box appears.

TVG DISTANCE

GAIN

200m

4.0

5. Press or to adjust TVG dist ance between 3.0 and 5.0 (130-320 m). As a general rule,

use a higher setting for low frequency transducer; a lower setting for high frequency transducer. The larger the figure the greater the distance at which TVG works. When you open the TVG dialog box the TVG line changes from solid to dashed and a solid line denotes current TVG setting.

TVG Distance Setting

Meters 3 8 20 40 60 100 130 160 200 250 320 Feet 10 30 70 130 210 330 410 520 660 820 1040 3280 Passi/braza 2 5 10 20 40 60 80 100 120 150 180 600 Hiro 2 5 10 20 40 60 80 100 130 170 210

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

. . . .

10.0

1000

660

2-14

Page 33

6. Press or to close the TVG distance dialog box and return to the HORZ menu.

7. To suppress reflections by the sea surface or plankton, select TVG LEVEL and press

8. Press

or to adjust TVG LEVEL, considering sea conditions. A setting between 2.0 and

5.0 should provide satisfactory results. The higher the figure the less the gain over distance.

9. Press the [MENU] key to register your selection and close the menu.

10. Watch a distant fish echo w hich is app roaching own ship. Adjust the tilt angle so the fish ech o

is within the sounding beam. Observe color of fish echo. If the color and size of the echo stay the same as the echo approaches own ship, the TVG setting is proper. If the echo suddenly becomes smaller, the TVG level may be too high.

2.11.4 Erasing weak echoes

Weak echoes such as interference can be erased from the screen. This is useful when you want to observe a fish school echo.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU.

to select COMN.

4. Press

5. Press

or to select SIG LEVEL.

to open the dialog box.

SIG LEVEL

OFF

(OFF, 1-14)

OFF

8-color display: OFF, 1-6 16-color display: OFF, 1-14

6. Press or to select echo color to erase. Pressing erases echoes from weak to strong in ascending order of strength. You can also see which echo color is erased by watching the color bar.

7. Press the [MENU] key to register your selection and close the menu.

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2.11.5 Enlarging fish echoes (expanded horizontal display)

Fish echoes may be enlarged 1.5 times by using the expanded horizontal display. Press the key to show the expanded horizontal display. The direction of expansion depends on the train direction as below.

Train center direction Position after expansion Remarks

318°−42 48°−123 138°−222 228°−312

Cursor data

→14 ↓ 12

B46˚ +

° °

Moves to screen bottom For viewing forward Moves to left side of screen For viewing starboard side Moves to screen top For viewing aft Moves to right side of screen For viewing port side

Sector marker

Train indicator

Tilt angle

Range

R 40 m

T 40˚

34° 12. 343' N 134° 34. 213' W

CSE 357˚ SPD 9.9 kt

DEP 35 m TMP 12.3˚C

Own ship marker

2-16

Cursor

Figure 2-16 Expanded horizontal display

CUR 11.0˚

2.0 kt

2.0 kt GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m COLOR

Page 35

2.12 Target Lock

Three types of target lock modes are available:

Manual reverse:

Position:

Echo:

The transducer train direction is reversed manually. This is the default setting, and is available in the horizontal and vertical fan modes.

Tracks stationary position (such as a reef) using position data from a navigator. Available in the horizontal mode only.

Tracks fish echo either manually or automatically. Available in the horizontal mode only.

2.12.1 Selecting target lock mode

1. Press the [MENU] key to open the menu.

2. Press

3. Press

4. Press

REVERSE POS ECHO

to select MENU and or to select the HORZ mode. or to select TARGET KEY.

to show the following dialog box.

TARGET KEY

5. Press or to select option desired.

6. Press the [MENU] key to register your selection and close the menu.

2.12.2 Manual reverse mode

The transducer train direction is reversed manually, thereby emphasizing possible fish echoes.

Note:

To activate the manual reverse mode:

1. Select REVERSE following the procedure in paragraph 2.12.1.

2. Press the [TARGET] key to reverse the transducer train direction when a fish school

This function is inoperative in the echo sounder mode. In the vertical fan mode the manual reverse mode is automatically selected regardless of the setting in paragraph

2.12.1.

appears. “REVERSE” momentarily appears at the screen top when the key is pressed and then the transducer train direction is reversed.

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Page 36

2.12.3 Position mode

This mode tracks a stationary position (such as a reef) using position data fed from a navigator. Note1: This function is inoperative in the echo sounder mode. In the vertical fan mode the

reverse mode is automatically selected regardless of the setting in paragraph 2.12.1.

Note2: This mode requires position data. When there is no position data the message “NO

POSITION DATA.” appears for five seconds and tracking is automatically cancelled. Check the navigator.

To use the position mode:

1. Select POS following the procedure in paragraph 2.12.1.

2. Use the Omnipad to select the location to track.

3. Press the [TARGET] key. The message “POS LOCK” appears momentarily at the screen top, the target lock marker is

displayed at the cursor position and the target lock indicator appears at the top right-hand corner of the screen while tracking (with position data from external equipment) is occurring. If the position goes out of the display area target lock is automatically cancelled and the target lock indicator and target lock marker disappear. The SECTOR, TILT and TRAIN controls are inoperative since they are automatically adjusted.

Target lock indicator

Target lock marker

Figure 2-17 Tar get lock indicator

4. To turn off the target lock, press the [TARGET] key again. The message “LOCK END” momentarily appears, the target lock marker and the target lock indicator disappear and previously used sector, train and tilt settings are restored. Also, latitude and longitude indication returns to normal.

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2.12.4 Echo mode

The echo mode tracks a fish school either automatically or manually. The default setting is automatic, and you can select automatic or manual with “LOCK MODE” in the HORZ menu.

Automatic echo tracking mode

The automatic echo target lock function automatically tracks a fish school appearing in the operator-selected target lock zone. If the tracked fish school goes out of the zone in the range direction, tracking is suspended until it or a new fish school comes into the zone.

To use the automatic echo tracking mode:

1. Select ECHO following the procedure in paragraph 2.12.1.

2. If necessary select LOCK MODE to AUTO (default setting) on the HORZ menu.

3. Press the [TARGET] key. The dialog box below appears at the screen center, the message “ECHO LOCK” appears for three seconds at the top of the screen, the target lock area appears in the current train area and the target lock indicator appears at the right-hand side of the screen.

TARGET LOCK AREA.

: INSIDE

: OUTSIDE

4. Use the [SECTOR] and [TRAIN] controls and the Omnipad to set the detection area. Do not include bottom echoes in the zone, so that target lock will not be activated by bottom echoes.

When a target of red or reddish-brown color is detected in the zone, the target lock indicator blinks and a buzzer sounds to call the operator’s attention. The [SECTOR], [TILT] and [TRAIN] controls are inoperative since they are automatically adjusted. When you attempt to operate those controls the message “TARGET LOCKING NOW.” appears.

Outer limit

Target lock indicator

NAV

DATA

Inner limit

Figure 2-18 Target lock area

2-19

Page 38

When the fish echo is lost the tilt angle is automatically changed as below to continue tracking the echo:

Tilt changed to search [(A + 10˚) → (A - 10˚) →A]

Detection area displayed once again and target lock indicator lights.

A: Tilt angle at start of target lock

5. To tu rn o ff the target lock, press the [TARGET] key again. The message “LOCK END ” appears for three seconds at the screen top, the target lock indicator disappears and operation continues with current train and tilt settings.

Manual echo tracking mode

1. Select ECHO following the procedure in paragraph 2.12.1.

2. Select LOCK MODE to MANUAL on the HORZ menu.

3. Press the [TARGET] key when a wanted target echo appears. The message “ECHO LOCK” appears along with the target lock indicator. Then, the

transducer train direction is reversed and searching starts with the current tilt angle. When a target echo appears the transducer train direction is again reversed automatically, the buzzer sounds and the target lock indicator blinks.

If the fish echo is lost the tilt angle is automatically changed to continue tracking as below.

1. Tilt angle is changed by +10˚ (A+10˚). (A is the tilt angle used when tracking began.)

2. Tilt angle is changed by -10˚ (A-10˚).

3. If the echo could not be found, tracking is cancelled and tilt angle A is restored.

4. To quit the target lock, press the [TARGET] key again. The message “LOCK END” appears momentarily.

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2.13 Horizo n t al Men u Overview

This section presents an overview of the items on the HORZ menu.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU and then press or to select the HORZ menu.

TVG LEVEL TVG DISTANCE GAIN ADJUST 0 RES. COLOR LOG AGC OFF TARGET KEY REVERSE LOCK MODE AUTO AUTO TILT AUDIO LEVEL 0

: SELECT

COMN HORZ VERT ES PRESET SYS

4.0

OFF

: CHANGE

MENU: END

Figure 2-19 HORZ menu

or to select item desired.

4. Press

5. Press

to show corresponding dialog box. or to select option desired.

6. Press the [MENU] key to register your selection and close the menu.

2.13.1 Horizontal menu descripti on

TVG LEVEL:

further details, see paragraph 2.11.3 on page 2-13.

TVG DISTANCE: GAIN ADJUST:

the horizontal mode when it is not the same as that on the vertical and echosounder modes. Setting range: -10 to +10. Default setting is 0.

Compensates for propagation loss of sound in water. Default setting is 4.0. For

As above. Default setting is 4.0.

Compensates for too weak or too strong echo level. Adjust it when the gain on

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RES. COLOR:

strength is emphasized in order of CUBE, SQUARE, LINEAR, LOG, and you can observe the characteristics of each by watching the color bar as you change the setting.

LOG: Displays weak to strong echoes in their respective levels. This is the default

LINEAR: Downplays the weak echoes when compared with LOG. Effective for suppressing

SQUARE: Strong echoes are emphasized more than in LINEAR. CUBE: Strong echoes are emphasized even more than in SQUARE.

AGC:

Automatically lowers sensitivity against strong echoes such as those from the bottom and large fish schools to emphasize weak echoes such as those from fish close to the bottom. The default setting is OFF.

Sets transfer characteristics of input signal level versus display echo level. Echo

setting, and is suitable for general use.

weak echoes such as plankton.

TARGET KEY:

REVERSE. For further details see paragraph 2.12 on page 2-17.

LOCK MODE:

Default setting is AUTO. For further details see paragraph 2.12 on page 2-17.

AUTO TILT:

±2 °, ±4 °, ±6 °, and ±10 °. Automatic tilt adjusts the tilt angle in the following sequence: B → ( B − A) → B → (B + A) → B → ( B − A) → B → ( B + A) …

B: Current tilt angle A: Auto tilt setting

For example, the tilt angle is 30 ° and the automatic tilt setting is ±4 °. Then, the tilt angle is changed in the following sequence: 30 ° → 26 ° → 30 ° → 34 °→ 30 °→ 26 °→ 30 °→ 34 °...

Note:

The [TILT] control is inoperative when automatic tilt is active.

AUDIO LEVEL:

10 and the default setting is 0. The loudspeaker monitors echoes from fish schools and bottom. This allows you to detect fish aurally when you may be preoccupied with other tasks. After you have become accustomed to utilizing the audio function, you should be able to detect a fish school from a range longer than you can detect it on the screen. In addition you may judge whether the fish schools is approaching or going away; the tone becomes higher when the fish is approaching and lower when going away.

Selects target lock function among reverse, position and echo. Default setting is

Selects how to track fish echo in “echo” target lock; automatically or manually.

Turns automatic tilt on or off, and the default setting is OFF. The choices are

Adjusts the audio level of the external loudspeaker (option). Setting range is 0-

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2.14 Interp retin g the Horizontal Display

This section provides information necessary for interpreting the horizontal display.

2.14.1 How the horizontal mode picture is painted

The wide sounding beam is emitted from the soundome at a certain tilt angle (see hatched area in the figure below). The information (target echoes) obtained by this beam is displayed in

sectors of increments of 12° of the screen . Thus, all directions around the boat are sounded in 30 times of transmissions.

Note:

When the “FAST SCAN” is switched off, the equipment operates in a narrow sounding beam. Then, the echoes appear on a 6° sector in each transmission, so 60 transmissions are required to complete the full 360° picture (6° x 60 = 360°). This means that training speed is slower. However, since transmission power is concentrated into the narrow sounding beam, a superior detection range is obtained. Furthermore, since the bottom contour is painted distinctly, bottom fish may be more easily detected.

Sounding Beam Screen Display

Tilt: θ

Sounding Beam

Train: 6˚*

Tilt: θ

When the narrow sounding beam (6˚) is selected 60 transmissions are required to complete the full circle.

Figure 2-20 How the horizontal mode picture is painted

*12˚ When high speed training is selected.

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2.14.2 Sample echo displa ys

Bottom echoes

When the tilt angle is changed, the bottom echo illustrated below will appear on the display. When the tilt is decreased (toward 0°), the bottom trace becomes wider and weaker. By observing the bottom condition on the display, t he sk ipper can prevent net damage.

(A) Flat bottom

Tilt angle: 10˚ to 15˚

(B) Flat bottom

Tilt angle: 20˚ or more

Decreased tilt angle Only half of vertical beam width captures the bottom.

Tilt angle: 20˚ or more

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

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

Bottom

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

Figure 2-21 Bottom echoes

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Fish schools

A fish school appears as a mass of echoes on the screen. The color of the mass shows the density of fish schools on the sonar beam. To find distribution and center point of a fish school, try several different tilt angles.

(A) Sea surface fish

Tilt angle: 0˚ to 10˚

Bottom echo not

Fish

school

Sea surface reflections

displayed because of decreased tilt angle. Sea surface reflections are present.

(B) Midwater, bottom fish

Fish echo which appears before bottom can be detected.

Tilt angle: 0˚ to 20˚ Fish echo which appears together with or after bottom can be detected.

Tilt angle: 30˚ or more

Bottom

Fish school

Large midwater fish school is present.

Fish

school

Bottom

When the tilt angle is shallow, the reflection echo from bottom is weak and the fish echo which appears from bottom is easy to find.

Figure 2-22 Fish schools

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Sea surface reflections

To reduce sea sur face reflections, set the tilt angle to 5° or higher, so the upper edge of the sonar beam does not hit the sea surface, or adjust TVG. When a decreased tilt angle is used, sea surface reflections cover a large area as illustrated below.

Sea surface

17˚

Sea surface

17˚

Tilt angle indication

Sea surface reflections

Figure 2-23 Sea surface reflections

Wake

A wake produced by own ship or another ship can be a strong reflecting object when a decreased tilt angle is used. As the wake appears as a thick continuous line, it can be easily distinguished from a fish school. A wake contains many air bubbles which attenuate ultrasonic energy, making it difficult to sound beyond the wake.

Other ship

2-26

Own ship

Own ship's screw noise

Wake produced by other ship

Figure 2-24 Wake

Own ship's screw noise

Own ship's wake (produced when own ship turned)

Page 45

Sidelobe echo (false echo)

An ultrasonic wave is emitted only in the direction set by the [TILT] control, however there are some emissions outside the main beam. These are called sidelobes. The energy of the sidelobe is fairly weak but when the water is comparatively shallow and the bottom is rocky and hard, strong signals are detected by the sidelobe. These are represented on the display as a false echo as shown below.

Mainlobe echo

Sidelobe

Mainlobe

Sidelobe echo

The bottom echo detected by sidelobe appears at a certain tilt angle when the sidelobe points vertically. Also, poor soundome projection may result in a similar false echo.

Figure 2-25 Sidelobe echoes

Noise and interference

When the fishing ground is crowded with many fishing boats, the sonar is subject to interference from ultrasonic equipment (echo sounder or sonar) on other boats as well as those on own ship.

For instance, interference from the sonar operated on other boats will show itself on the display as in (A) in the figure below. This interference can be suppressed by changing the Tx rate on the COMN menu. Noise from marine life shows itself on the displays as in (B) in the figure below. This type of noise can be suppressed with the interference rejector on the COMN menu.

(A) Inteference from (B) Interference from other sonars (yours marine life or other's)

Figure 2-26 Noise and interference

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2.14.3 Combination display examples

Horizontal/history display

Press the key to display the horizontal/history display.

Tilt angle

Cursor position data

Own ship marker

Cursor

→17 ↓ 14

B148˚ +

Horizontal Display

Range

R 40 m T 40˚

34° 12. 343' N 134° 34. 213' W

CSE 357˚ SPD 9.9 kt

HIstory Display

Tilt angle indicator

Interference rej. ON

Target lock indicator Transducer status

indicator

Position in latitude*, longitude*

Course*, speed*

Fish echo

Bottom echo

* Requires appropriate sensor input.

Figure 2-27 Horizontal/history display

The horizontal display appears in the main window; the history display in the sub window. The length of the picture displayed in the history display is equal to about four full circle pictures. Thus the history display enables you to observe the history of fish movement and distribution. It is also useful for detecting bottom fish, reefs and sunken vessels.

The history display cannot be adjusted.

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Page 47

Horizontal/video plotter display

Press the key to display the horizontal/video plotter display.

Tilt angle

Cursor position data

Own ship marker

Track*

Event marker

Cursor

→18 ↓ 15

B154˚ +

→15 B 195°

Event marker data

* Requires appropriate sensor.

Horizontal Display

Range

R 40 m T 40˚

34° 12. 343' N 134° 34. 213' W

CSE 357˚ SPD 9.9 kt

Video Plotter Display

Tilt angle indicator

500

Track*

Interference rej. ON Target lock indicator

Transducer status indicator

Position in latitude*, longitude* Course*, speed*

Sonar range marker

Event marker (Entered from horizontal mode)

Scale

Figure 2-28 Horizontal/Video Plotter display

The horizontal display appears in the main window; the video plotter display, which tr aces ship’s track on the display, in the sub window. Compared to the horizontal display the video plotter’s range is much longer. For example, an event marker entered on the horizontal display disappears from that display when it goes out of the current range. However, it remains on the video plotter display for a much longer time when a long range scale is used. This can be useful when you want to return to the location denoted with an event marker.

The video plotter scale can be changed (setting range: 500-5,000 meters) with “TRACK DISP” on the RANGE-SONAR MODE menu. For details see page 5-13.

The video plotter display cannot be adjusted.

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Horizontal/strata display

Press the key to display the horizontal/strata display.

Tilt angle

Cursor position data

Own ship marker

Color bar for strata display

Cursor

→12 ↓ 10

B133˚ +

Horizontal Display

(main display)

Range

R 40 m T 40˚

CSE 357˚ SPD 9.9 kt

-90°

Tilt angle indicator

34° 12. 343' N 134° 34. 213' W

PORT STBD

0° +90°

Heading

Strata Display

(sub window)

Interference rej. ON

Target lock indicator

Transducer status indicator

Position in latitude*, longitude* Course*, speed*

Number of lines increases by one with each train. Top line is latest; bottom line is oldest.

* Requires appropriate sensor input.

Figure 2-29 Horizontal/strata display

The horizontal display appears in the main window; the strata display in the sub window. T h e strata picture shows bottom undulations in different colors. This is useful in bottom trawling to avoid projections which may damage the net.

Coverage for the horizontal mode is 360° picture, and for the strata display it is maximum 90° from port to 90° starboard.

The strata display may be adjusted with the [RANGE] and [SECTOR] controls. Press the [MAIN/SUB] key to select the main or sub window. The message MAIN WINDOW CONTROLLABLE or SUB WINDOW CONTROLLABLE appears with each pressing of the key. A red cursor appears in the sub window when it can be controlled.

2-30

Page 49

Color bar for the strata display The depth of the bottom echo in all directions is displayed in the sub window, in t he color s set by

the color bar for the strata display.

Strongest color

Color bar for strata display

Weakest color

-12

-90

-18

The undulation of the bottom echo in all directions is shown by the colors on the color bar for the strata display.

-6

The position of the weakest echo can be changed with the [RANGE] control, and the width of each color on the color bar for the strata display with the [SECTOR] control.

Use the [SECTOR] control to adjust width of each color.

Weakest color

Use the [RANGE] control to move the location of the weakest echo color.

Note:

TIL T, TRAIN, FULL/HALF , FAST SCAN, R/B, EVENT, TARGET, CUSTOM MODE controls may only be operated from the main window. When you attempt to operate them from the sub window the message “SELECT MAIN WINDOW.” appears for about four seconds.

Flat bottom and strata display

Each layer on the strata display is equal to one train on the horizontal display.

Color "a"

The color of this position on the color bar is the color of point "a" on the strata display.

Figure 2-30 Flat bottom and strata display

-90˚

PORT STBD

+90˚

Color "a" on the color bar

When the bottom is flat the horizontal display inscribes the bottom as a true circle, and the strata display inscribes the color of point "a".

2-31

Page 50

Projection in fore direction and strata display

Color "b" on the color bar is displayed here.

Color "b"

-90˚

Color "a"

PORT STBD

Figure 2-31 Projection in fore direction and strata display

Depth becoming shallower gradually in fore direction and strata display

Color "c"

-90˚

PORT STBD

Color "b"

+90˚

Color "a" on the color bar

+90˚

Color "a"

Color "c"

Color "a"

Color "b"

Figure 2-32 Depth becoming shallower gradually in fore direction and strata display

Depth becoming deeper gradually in fore direction and strata display

-90˚

bcd

Color "a"ad

+90˚

2-32

Figure 2-33 Depth becoming deeper gradually in fore direction and strata display

Page 51

3. VERTICAL FAN MODE

3.1 Operational Overview

The figure below shows the typical vertical fan mode operating sequence.

Turn on the power.

POWER

7(a).

Adjust gain.

XDR

Set center bearing of train

sector.

Set scanning sector.

GAIN

SECTOR TRAIN

DISPLAYMODE

Set range.

MAIN

SUB

RANGE

FULL HALF

CUSTOM MODE

Set tilt angle.

TILT

FAST

SCAN

BRILL

TARGET

R/B

11.

Adjust menu settings

(ex. TVG) as required.

EVENT

Lower the transducer.

Select appropriate

vertical fan mode.

7(b).

Select training sector 180˚.

Figure 3-1 Control panel

10.

Measure range and

bearing to target with cursor.

Adjust screen

brilliance.

3-1

Page 52

3.2 Typical Vertical Fan Mode Display

Bearing indicator (Shows training direction.)

FORE

Own ship PORT

STARBOARD

Vertical range

Interference rejector ON

Cursor position data

Fish echo

Cursor

Horizontal range

Bottom echo

Depth

Horizontal marker

+→6 ↓ 145

AFT

Training indicator

Heading*

FORE AFT

340˚

Horizontal range

R → 60 m ↓ 100 m

34° 12. 343' N 134° 34. 213' W

100

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

Horizontal range scale

Position in latitude*, longitude*

CSE 357˚ SPD 9.9 kt

DEP

TMP

CUR 11.0˚

2.0 kt GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m COLOR

35 m

12.3˚C

Course*, speed*

Depth

Water temperature*

Tide direction*, tide speed*

Gain setting TVG level,

distance settings

Color bar

Sector center indicator

Figure 3-2 Typical vertical fan mode display

Event marker

Vertical range scale

Horizontal range marker

* Requires appropriate sensor.

3-2

Page 53

3.3 Selecting the Range

The [RANGE] control selects the detection (display) range, in 15 settings. Select the range according to either the fish species being searched or the depth desired. Each time the control is operated the newly selected range briefly appears in large characters at the screen top. Range is permanently displayed at the top right-hand corner of the screen.

Normally the range is set so that the bottom is traced at the lower part of the screen (like an echo sounder).

Surface

RANGE m

Bottom

Figure 3-3 Range concept

Default vertical fan mode range settings

Unit 1234 5 6789101112131415 Meters 10 20 30 40 60 80 100 120 160 200 250 300 400 500 600 Feet 30 60 90 120 150 200 250 300 400 500 600 800 1000 1500 2000

Note 1:

Note 2:

Unit of range measurement may be selected for meters, feet, fathoms, passi/braza or Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page 5-

9. Ranges may be freely preset as desired. For details see page 5-14.

3-3

Page 54

3.4 Selecting Train Center

The [TRAIN] control determines the bearing of the vertical fan beam, from 0° to 180°. Bearing of beam position can be found with the train indicator.

0˚ (360˚) → 6˚ → 12˚ → 18˚ → ... 180˚

Train Indicator Train of Vertical Fan Beam

Train indicator

TRAIN

Bow

Figure 3-4 Train indicator

Train 0˚ Train 90˚ Train 180˚

FORE

STBD

Figure 3-5 Train indicator and display

AFT

3-4

Page 55

3.5 Selecting Display Sector

Sector means the width of the transducer training, from 6° to 180°.

24˚

Sector (Shown: 24˚)

Figure 3-6 Sector

The [SECTOR] control selects the training area among the sixteen positions shown in the table below. Clockwise rotation of the control increases the sector width; counterclockwise rotation decreases it.

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

Sector width (°

One-touch selection of 180

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

)

sector

°°°°

1. Press the [FULL/HALF] key. A half-circle display of 180° is presented.

2. Press the [FULL/HALF] key again, and a 120°-sector display is presented.

Note:

Operating the [SECTOR] control between steps 1 and 2 in the procedure above displays the 180°

sector at the next pressing of the [FULL/HALF] key.

Sector set with SECTOR control

24˚

Half circle

FULL/HALF

key

180˚

0˚

Figure 3-7 How the FULL/HALF key works

key

180˚

0˚

120˚

3-5

Page 56

3.6 Selecting Sector Center

The center direction of the sounding beam in the vertical direction can be changed wi th the [TILT] control. The setting range is 0° to 180° in increments of 6°. Select the setting which places the sector center in the middle of the detection range.

Sector center angle set with TILT control

PORT

Sector of 48˚ set with [SECTOR] control

STBD

Sector center indicator

Figure 3-8 Sector center

In the example display at left, the sector center indicator is starboard, and the width of the sector is 48˚.

Sector range

180˚

0˚

Automatic shifting of own ship position

Own ship position on the screen is automatically shifted either rightward or leftward according to the direction of the sector center and display sector width.

The figure below shows the own ship position has been shifted rightward on the screen to provide the wider view at the port side.

Sector center 0° to 60 Sector center 66° to 114 Sector center 120° to 180

Display sector

Sector center

°:

Own ship position shifted to port side

°:

Own ship position shifted to center

°:

Own ship position shifted starboard

3-6

Figure 3-9 How automatic shifting works

Page 57

3.7 Selecting the Training Speed

The training speed selects how fast the transducer scans the display sector. Two choices are available, 3° (normal speed, default setting) and 6° (high speed), and one may be selected with the [FAST SCAN] key. Each time the key is pressed the display momentarily shows “NORM” (normal speed) or “FAST” (high speed).

Normal: 60 transmissions for half circle in increments of 3°. High: 30 transmissions for half circle in increments of 6°.

3.8 Finding Echo Position with the Cursor

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

Cursor data

+→ : Horizontal range ↓: Depth

NAV

DATA

Cursor

Figure 3-10 Location of cursor position data

3-7

Page 58

3.9 Event Marker

The event marker functions to mark important locations on the screen, and five event markers may be inscribed. Each time the [EVENT] key is pressed the “latest event marker” ( inscribed at the cursor location and all previously entered event markers are shown by the “previous event marker” (+). When the capacity for event markers is reached the eldest event marker is erased from the screen to make room for the latest.

⊕

) is

Note 1:

Note 2:

1. Operate the Omnipad to place the cursor on the location desired for an event marker.

2. Press the [EVENT] key to inscribe the event marker. The event marker is inscribed on the

Event marker position can be output to external equip ment and ma rked on the display of the external equipment. Each press of the [EVENT] key outputs event marker position. For details see EVENT MARK INFO on page 5-9.

Event markers cannot be inscribed from the vertical fan display when it is in the sub window (Horizontal/vertical fan display). Inscribe the marker from the horizontal display to show it in the vertical fan display.

vertical fan display, as well as the horizontal and video plotter displays.

"Previous event marker"

Display area

NAV

DATA

3-8

"Latest event marker"

To delete all event markers, place cursor outside display area and press the [MENU] key.

Figure 3-11 How to inscribe, delete the event markers

Page 59

1 Deleting all event markers

All event markers can be erased from t he screen as follows:

1. Operate the Omnipad to place the cursor outside the display area.

2. Press the [EVENT] key to show the following dialog box. Do t he next st ep within four

seconds, otherwise the dialog box will be erased.

DELETE EVENT MARK?

YESNO

3. Press

screen.

to select YES and pr ess t he [MENU] key. All event markers are erased from the

3.10 Depth and Horizontal Range Markers

The depth and horizontal range mark er s function to measure the horizontal range and dept h t o a desired echo.

Note: Depth and horizontal range markers cannot be inscribed from the vertical fan display

when it is in the sub window (Horizontal/vertical fan display). Inscribe the marker s from the horizontal display to show it in the vertical fan display.

1. Operate the Omnipad to place the cursor on the locat ion desir ed.

2. Press the [R/B] key to display the depth and horizontal range markers. Horizontal range and

depth appear on the screen.

3. To erase t he dept h and hor izontal r ange markers, press the [R/ B] key again, or place the

cursor on the depth or horizontal range mar ker and press the [R/B] key.

Horizontal range

Depth marker

Figure 3-12 Depth and horizontal range markers

105

Depth

NAV

DATA

marker

3-9

Page 60

3.11 Adjusting the Picture

3.11.1 Displaying weak echoes clearly

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

To adjust TVG:

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU and then press or to select the VERT menu.

TVG LEVEL

GAIN ADJ 0 RES. COLOR LOG

: SELECT

COMN HORZ VERT ES SHORT-CUT SYS

4.0

4.0TVG DISTANCE

: CHANGE

MENU: END

Figure 3-13 VERT menu

or to select TVG DISTANCE and press to show the following dialog box.

TVG DISTANCE

4.0

3-10

GAIN

200m

Page 61

4. Press or to adjust TVG distance, considering sea conditions. The larger the figure the

)

greater the distance at which the TVG works.

TVG Distance Setting

Meters 3 8 20 40 60 100 130 160 200 250 320 Feet 10 30 70 130 210 330 410 520 660 820 1040 3280 Passi/braza 2 5 10 20 40 60 80 100 120 150 180 600 Hiro 2 5 10 20 40 60 80 100 130 170 210

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

. . . .

10.0

1000

660

5. Press or to close the dialog box and return to the VERT menu.

6. To suppress reflections by the sea surface or plankton, select TVG LEVEL and press

7. Press

or to adjust TVG LEVEL, considering sea conditions. The larger the figure the

less the gain over distance.

8. Press the [MENU] key to register your selection and close the menu.

Wrong Correct Level too high Distance too high

Figure 3-14 Examples of proper and improper TVG

3.11.2 Suppressing noise and interference

You may encounter occasional or intermittent noise and interference as shown below. This is mostly caused by electrical equipment, engine, propeller noise from own ship, or noise from other sonars being operated nearby. If interference appears, turn on the interference rejector in the COMN menu to suppress it.

Interference rejector ON

Interference (In this display, interference shows itself ever

Figure 3-15 Appearance of interference

6˚.

3-11

Page 62

3.12 Vertical Menu Overview

This section presents an overview of the items on the VERT menu.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

4. Press

to select MENU and then press or to select the VERT menu.

TVG LEVEL

GAIN ADJ 0 RES. COLOR LOG

: SELECT

COMN HORZ VERT ES SHORT-CUT SYS

4.0

4.0TVG DISTANCE

: CHANGE

MENU: END

Figure 3-16 VERT menu

or to select item desired.

to show corresponding dialog box.

5. Press

or to select option desir ed.

6. Press the [MENU] key to register your selection and close the menu.

3.12.1 Vertical menu description

TVG LEVEL: TVG DISTANCE: GAIN ADJUST:

the vertical fan mode is not the same as that on the horizontal and echo sounder modes. Setting range: -10 to +10. Default setting is 0.

RES. COLOR:

strength is emphasized in order of CUBE, SQUARE, LINEAR, LOG. You can see the characteristics of each by watching the color bar as you change the setting. Default setting is LOG.

LOG: Displays weak to strong echoes in their respective levels. This setting is suitable

LINEAR: Downplays the weak echoes when compared with LOG. Effective for suppressing

SQUARE: Strong echoes are emphasized more than in LINEAR. CUBE: Strong echoes are emphasized even more than in SQUARE.

Compensates for propagation loss of sound in water. The default setting is 4.0.

As above. Default setting is 4.0.

Compensates for too weak or too strong echo level. Adjust it when the gain on

Sets transfer characteristics of input signal level versus display echo level. Echo

for general use.

weak echoes such as plankton.

3-12

Page 63

3.13 Interp retin g the Vertical Fan Display

This section provides information necessary for interpreting the vertical fan display.

3.13.1 How the vertical fan mode picture is pa inted

The sounding beam is emitted and the information (target echoes) obtained by the beam appears in the corresponding sector as it appears on the sonar mode. The difference is that the training is performed only in vertical direction. It forms a sounding area of a half-circle (like a slice of watermelon) to observe a vertical section of underwater conditions.

The bearing of the vertical sounding beam can be selected manually or automatically.

Sounding Beam Screen Display

(1) Bearing of the sounding beam

0°

Bow

180°

Tilting direction

(2) Sector center

(3) Display area

Select the bearing of the sounding beam (1) by [TRAIN] control, the sounding sector center (2) by the [TILT] control and the display area (3) by the [SECTOR] control.

Freq: 60 kHz

Figure 3-17 How the vertical fan mode picture is painted

(1) Bearing of the sounding beam

180°

(2) Sector center, (3) Display area

0°

Sector center 90°. Display range 24°.

3-13

Page 64

3.13.2 Sample echo displa ys

Port-starboard picture (bottom)

You can see fish echoes at the center-right of the screen. The bottom is displayed wider as the distance from the ship’s position increases. Therefore, it may be difficult to discriminate bottom fish.

Own ship

PORT

Bottom

STBD

Fish school

Figure 3-18 Port-starboard picture

When ship passes over fish schools

The sounding beam is directed fore-aft and the display is off-centered* to present a wider view of the area forward of the ship. You can clearly see fish schools approaching from the bow of the ship.

*: Automatically shifted.

Forward

FORE

Fish school

FORE

Fish school

Own ship

AFT

Figure 3-19 Picture appearance when passing over fish schools

3-14

Page 65

Display of net hauling

This is an example of net hauling display. The location of the net is indicated clearly.

FORE

Net

AFT

Figure 3-20 Net hauling and sonar picture

False echo

In shallow water (depth less than 100 m) detection, unwanted echoes shown in the figure may appear. This phenomenon is caused by the false echo from the previous transmission. Reducing the Tx rate on the COMN menu may lessen this effect.

PORT STBD

False echo

Bottom

Fish

Figure 3-21 False echoes

Range

3-15

Page 66

3.13.3 Horizontal/vertical fan display

Press the key to display the horizontal/vertical fan display.

Tilt angle

Cursor data

Vertical fan bearing cursor

Range

Tilt angle indicator

Own ship marker

Cursor

→17 ↓ 14

B156˚ +

R 40 m T 40˚

34° 12. 343' N 134° 34. 213' W

CSE 357˚ SPD 9.9 KT

AFT FORE

Horizontal Display

(main window)

Vertical Fan Display

Figure 3-22 Horizontal/vertical fan display

Interference rejector ON

Target lock indicator

Transducer status indicator Position in latitude*,

longitude*

Course*, speed*

* Requires navigator.

100

(sub window)

The horizontal display appears in the main window; the vertical fan display in the sub window. The displays are independent of each other so you can adjust them as desired. Press the

[MAIN/SUB] key to select the window to adjust. Each pressing of the key momentarily displays MAIN WINDOW CONTROLLABLE or SUB WINDOW CONTROLLABLE at the top of the screen. A red cursor appears in the sub window when it can be controlled. The following controls are operative on either window: SECTOR, TRAIN, RANGE, TILT, FAST SCAN, FULL/HALF and CUSTOM MODE.

Note:

R/B, EVENT or TARGET controls may only be operated from the main window. When you attempt to operate them from the sub window the message SELECT MAIN WINDOW appears.

TRAIN control

For horizontal display: Sets training center direction. For vertical fan display: Sets direction of bearing cursor shown on the horizontal mode display.

3-16

Page 67

SECTOR control

For the vertical fan display: When the display sector is 6° (minimum) the tilt angle of the horizontal and vertical fan modes are interlocked and each transmission on the horizontal display is reflected on the vertical fan display. The message TILT ANGLE MONITOR WINDOW momentarily appears on the screen and the vertical bearing cursor disappears.

Note:

Only the [SECTOR] control may be operated in this condition.

FORE

100

3-17

Page 68

This page is intentionally left blank .

Page 69

4. ECHO SOUNDER MODE

4.1 Operational Overview

The figure below shows the typical echo sounder mode operating sequence.

Set tilt angle.

Turn on the power.

POWER

Select display sector.

Adjust gain.

XDR

GAIN

DISPLAYMODE

SECTOR TRAIN

Set range

MAIN

SUB

RANGE

FULL

HALF

CUSTOM MODE

FAST

SCAN

TILT

BRILL

11.

(turn on A-scope display, etc.).

TARGET

R/B

Adjust menu settings

EVENT

Lower the transducer.

Select echo sounder

mode.

Set picture advance speed.

Figure 4-1 Control panel

10.

Measure range to fish

school with cursor.

Adjust screen

brilliance.

4-1

Page 70

4.2 Typical Echo Sounder Display

Press the key to display the echo sounder picture.

Interference rejector ON

Cursor position

Minute marker

Fish echo

Cursor

Range

Bottom echo

+ 4

↓

DEP

6.5 m

Bearing indicator (Shows train direction.)

Tilt angle indicator (Shows tilt angle of transducer.)

Tilt angle

Heading

340°

TMP

Range

R 10 m T 60°

34° 12. 343' N 134° 34. 213' W

12. 3˚C

Transducer status indication

Position in latitude*, longitude*

CSE 357˚ SPD 9.9 kt

CUR 11.0˚

2.0 kt

GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m

Course*, speed*

Tide direction*, tide speed*

Gain setting

TVG level, distance settings

Color bar

* Requires appropriate sensor.

Depth

Event marker

Water temperature*

Range scale

Figure 4-2 Typical echo sounder display

Range marker

4-2

Page 71

4.3 Selecting the Range

Normally the range is set so that the bottom is traced at the lower part of the screen.

Surface

RANGE m

Bottom

Figure 4-3 Range concept

Default echo sounder mode range settings

Unit123456789101112131415 Meters 10 20 30 40 60 80 100 120 160 200 250 300 400 500 600 Feet 30 60 90 120 150 200 250 300 400 500 600 800 1000 1500 2000

Note 1:

Note 2:

Unit of range measurement may be selected for meters, feet, fathoms, passi/braza or Hiro (Japanese). For details see page 5-9.

Ranges may be freely preset as desired. For details see page 5-15.

4-3

Page 72

4.4 Train Direction

The sounding beam may be directed toward fore, aft, port or starboard. Operate the [TRAIN] control to select sounding beam direction. Each setting on the control is an increment of 6°. The train indicator at the top of the screen shows training direction: 0°, fore direction; 90°, starboard direction; 180°, aft direction, and 270°, port direction.

0˚ (360˚) → 6˚ → 12˚ → 18˚ → ... 354˚

Train 0˚ Train 90˚ Train 180˚ Train 270˚

Figure 4-4 Train indicator and display

4.5 Selecting Tilt Angle

The transducer can pointed directly toward the bottom or forward of the ship. Operate the [TILT ] control to select an appropriate tilt angle. The available tilt angle is 0° (horizontal direction) to 90° (vertical) in increments of 1° “T”.

Selected tilt angle appears at the top of the display to the right of

4.6 Selecting Picture Advance Speed

The picture advance speed determines how quickly the v ertical scan lines run across the screen, from right to left. When selecting a picture speed, keep in mind that a fast advance speed will expand a fish school horizontally on the screen and a slow one will contract it.

1. Press the [FAST SCAN] key. The following dialog box appears. Do the next step within four

seconds otherwise the dialog box will be erased.

ADVANCE 1/8 1/4 1/2 1/1 2/1

2. Press or ([FAST SCAN] key may also be u sed) to select a speed. The frac tions in dialo g

box correspond to the number of scan lines produced per transmission. For example, “2/1” means two scan lines are produced per transmission.

3. Press the [MENU] key to close the dialog box. Note that the dialog box is automatically

closed if there is no control operation for about four seconds.

4-4

Page 73

4.7 Measuring Range by Cursor

Use the cursor to display the range from own ship to the cursor location. Use the Omnipad to place the cursor where desired. The range to the cursor appears at the upper left-hand corner of the screen.

Range to cursor

: Range

↓

NA V

DATA

A-SCOPE

DISPLAY

Depth, Water Temp. Display

Cursor

Figure 4-4 How to measure range with the cursor

4.8 Event Marker

Note 1: The event marker inscribed on the echo sounder display will also be inscribed on the

horizontal and video plotter displays. However, the mark is always inscribed at own ship position on the horizontal and video plotter displays regardless of the location of the mark on the echo sounder display.

Note 2: Event marker position can be output to external equipment and marked on the display

of the external equipment. Each press of the [EVENT] key outputs event marker position. For details see EVENT MARK INFO on page 5-9.

Note 3: Event markers are automatically erased as they move off the screen with picture

advancement.

⊕

) is

4-5

Page 74

4.8.1 Inscribing the event marker

1. Operate the Omnipad to place the cursor on the location desired for an event marker.

2. Press the [EVENT] key to inscribe the event marker.

Display area

"Previous event marker"

NA V

DATA

A-SCOPE

DISPLAY

Depth, Water Temp. Display

"Latest event marker"

To delete all event markers, place the cursor outside the display area and press the [EVENT] key.

Figure 4-5 How to inscribe, delete the event markers

4.8.2 Deleting all event markers

All event markers can be erased from the screen as follows:

1. Operate the Omnipad to place the cursor outside the display area.

2. Press the [EVENT] key to show the following dialog box. Do the next step within four seconds,

otherwise the dialog box will be erased.

DELETE EVENT MARK?

YESNO

3. Press to select YES and press the [MENU] key. All event markers are erased from the

screen.

4-6

Page 75

4.9 Range Marker

The range marker functions to measure the range to a target echo (fish school, bottom, etc.)

1. Operate the Omnipad to place the cursor on the location desired.

2. Press the [R/B] key to display the range marker. The range marker appears along with range

indication.

3. To erase the range marker, press the [R/B] key again, or place the cursor on the range

marker and press the [R /B] key.

Range marker

NA V

Range

Depth, Water Temp. Display

DATA

A-SCOPE

DISPLAY

Figure 4-6 Range marker

4.10 Adjusting th e Pictu re

4.10.1 Displaying weak echoes clearly

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

To adjust TVG:

1. Press the [MENU] key to open the menu.

2. Press

to select MENU and then press or to select the ES menu.

4-7

Page 76

COMN HORZ VERT ES SHORT-CUT SYS

3. Press

TVG LEVEL TVG DISTANCE GAIN ADJUST 0 RES. COLOR LOG A-SCOPE OFF

: SELECT

4.0

: CHANGE

MENU: END

Figure 4-7 ES menu

or to select TVG DISTANCE and press . The following dialog box appears.

TVG DISTANCE

GAIN

4.0

200m

4. Press or to adjust TVG dist ance.

TVG Distance Setting

Meters 3 8 20 40 60 100 130 160 200 250 320 Feet 10 30 70 130 210 330 410 520 660 820 1040 3280 Passi/braza 2 5 10 20 40 60 80 100 120 150 180 600 Hiro 2 5 10 20 40 60 80 100 130 170 210

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

. . . .

5. Press or to close the dialog box and return the ES menu.

6. To suppress reflections by the sea surface or plankton, select TVG LEVEL and press

7. Press

or to adjust TVG LEVEL.

8. Press the [MENU] key to register your selection and close the menu.

10.0

1000

660

4-8

Page 77

4.10.2 Finding echo strength ( A-scope display)

The A-scope display shows echoes at each transmission with amplitudes and tone proportional to their intensities on the right 1/4 of the screen. It is useful for estimating the kind of fish school and bottom composition.

1. Press the [MENU] key.

2. Press

3. Press

4. Press

5. Press

6. Press to select ON.

7. Press the [MENU] key to close the dialog box.

to select MENU.

or to select ES.

to select A-SCOPE.

or to open the dialog box.

A-SCOPE

OFF ON

Echo sounder picture

Depth, Water Temp. Display

Figure 4-8 A-scope display

A-scope display

4-9

Page 78

4.11 Echo Sounder Menu Overview

This section presents an overview of the items on the ES menu.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU and then press or to select the ES menu.

TVG LEVEL TVG DISTANCE GAIN ADJUST 0 RES. COLOR LOG A-SCOPE OFF

: SELECT

or to select item desired.

COMN HORZ VERT ES SHORT-CUT SYS

4.0

: CHANGE

Figure 4-9 ES menu

MENU: END

4. Press

5. Press

6. Press the [MENU] key to register your selection and close the menu.

to show corresponding dialog box. or to select option desired.

4.11.1 Echo sounder menu description

TVG LEVEL:

page 4-7. Default setting is 4.0.

TVG DISTANCE: GAIN ADJUST:

sounder mode when it is not the same as that on the horizontal and vertical fan modes. Setting range: -10 to +10. Default setting is 0.

Compensates for propagation loss of sound in water. See paragraph 4.10.1 on

As above. Default setting is 4.0.

Compensates for too weak or too strong echo level. Adjust the gain on the echo

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RES. COLOR:

strength is emphasized in order of CUBE, SQUARE, LINEAR, LOG. You can see the characteristics of each by watching the color bar as you change the setting. The default setting is LOG.

LOG: Displays weak to strong echoes in their respective levels. This setting is suitable

LINEAR: Downplays the weak echoes when compared with LOG. Effective for suppressing

SQUARE: Strong echoes are emphasized more than in LINEAR. CUBE: Strong echoes are emphasized even more than in SQUARE.

Sets transfer characteristics of input signal level versus display echo level. Echo

for general use.

weak echoes such as plankton.

A-SCOPE:

page 4-9.

Turns the A-scope display on/off. Default setting is OFF. See paragraph 4.10.2 on

4-11

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Page 81

5. MENU OPERATION

This chapter provides menu operating information on menus not previously discussed: COMN (Common) menu, PRESET (or SHORT-CUT, depending on the setting of CUSTOM KEY on the SYSTEM SETTING 1 menu) and SYS (System) menu.

5.1 COMN Menu

1. Press the [MENU] key to open the menu.

2. Press

3. Press

to select MENU, and then press to select COMN.

WHITE MARKER SIG LEVEL COLOR 16 BKGD COLOR 1 TX POWER HIGH PULSELENGTH LONG TX RATE 10 INT REJECT TRACK ON

: SELECT

or to select item; or to open associated dialog box.

COMN HORZ VERT ES PRESET SYS

OFF OFF

OFF

: CHANGE

Figure 5-1 COMN menu

MENU: END

4. Press

5. Press

selection and close the menu.

or to select option desired.

or to return to the COMN menu, or press the [MENU] key to register your

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5.1.1 COMN menu description

WHITE MARKER:

the seabed. The setting range for the 8-color display is OFF, 1-7, and for the 16-color display, OFF, 1-15. The default setting is “0.”

SIG LEVEL:

light-blue. These weak echoes may be erased in order of strength with SIG LEVEL. Select the signal level to erase with the Omnipad. The setting range for the 8-color display is OFF, 1-6, and for the 16-color display, OFF, 1-14. The default setting is “OFF.”

COLOR: BKGD COLOR

settings for each choice is as below. The default background color arrangement is BKGD2.

1 Black Gray Dark-blue 2 Dark-blue White Medium blue 3 White Black Gray

TX POWER:

"maximum." For further details see page 2-12.

Selects 8- or 16-color display. The default setting is 16.

BKGD COLOR Background Text Menu

Displays desired echo in white. It is useful for discriminating bottom fish from

Dirty water or reflections from plankton may be painted on the screen in green or

: Selects color of background, text and menu in choices 1, 2 and 3. The default

Selects transmitter output power to maximum or minimum. The default setting is

PULSELENGTH:

2.11.2 on page 2-13.

TX RATE:

transmitter, or an external synchronous signal may be used. The higher the number the greater the number of transmissions. For operation in shallow waters, select the Tx rate which displays the second reflection from the bottom between the sea surface and bottom. For use of an external video sounder or sonar, select EXT.

INT REJECT:

paragraph 3.11.2 on page 3-11.

TRACK:

on the video plotter display (provided there is position input) regardless of this setting. The default setting is ON.

The Tx rate may be set between 1-10 (default setting: 10) in the case of the internal

Turns ship’s track display on the horizontal display on/off. The track is always displayed

Selects pulselength to short or long (default setting). For details see paragraph

Turns the interference rejector on or off (default setting). For details, see

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5.2 Short-cut Menu, Preset Menu

These menus program the CUSTOM MODE keys [1], [2] and [3], and one of the menus appears according to the setting of CUSTOM KEY on the SYSTEM SETTING 1 menu.

Short-cut key: Preset key:

One-touch activation of corresponding dialog box. This is the default setting.

One-touch setup of mode, sector , train, range, tilt and speed controls. Below are the

default settings for PRESET.

CUSTOM MODE key Display Mode Sector Train Range (m)* Tilt Speed

Key 1 Expanded Horizontal Key 2 Horizontal Key 3 Vertical Fan

240 360 180

° ° °

0 0

° °

250 250 120

30 30 90

° ° °

* - Default range for 60 kHz transducer. Default range changes with transducer.

5.2.1 Selecting short-cut or preset

1. Press the [MENU] key to open the menu.

2. Press

to select MENU, and then press to select SYS.

MENU COMN HORZ VERT ES SHORT-CUT SYS

GO TO SYS MENU

NOYES

Fast Fast Fast

3. Press

4. Press

: SELECT

: CHANGE

Figure 5-2 Display for opening system menu

to select GO TO SYS MENU.

to select YES.

MENU: END

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** SYSTEM MENU **

SYSTEM SETTING:

RANGE-SONAR MODE RANGE-VERTICAL MODE RANGE-E/S MODE COLOR PALETTE LANGUAGE SYSTEM BACKUP LOAD BACKUP DATA HEADING OFFSET ADJ MOTION SENSOR TX FREQ ADJUST TEST TEST PATTERN DEMO MODE DEFAULT

5. Press

: SELECT

: MENU DISPLAY MENU: END

Figure 5-3 System menu

to open the SYSTEM SETTING menu.

** SYSTEM SETTING 1 **

MENU 1 2

SHIP'S POSITION : CURRENT DATA : HEADING INDICATION : TRUE AZ NORTH MARK : OFF ON CSE DATA : NAV GYRO NAV DATA : GPS LoranC LoranA DR DECCA OTHERS TVG CORRECTION : OFF 1/2 1/1 UNIT :

TEMP

EVENT MARK INFO : CUSTOM KEY : STABILIZER : RED STRESS FUNC : ETA MARK :

L/L LOP OFF FLOW FROM FLOW TO

m ft fa HIRO P/B

: ˚C ˚F

OFF ON PRESET KEY OFF ON OFF ON OFF 10sec 30sec 1min 3min 6min

SHORT-CUT KEY

: SELECT

: CHANGE MENU: END

Figure 5-4 System setting 1 menu

6. Press

7. Press

or to select CUSTOM KEY.

or t o select PRESET KEY or SHORT-CUT KEY as desired.

8. Press the [MENU] key twice to register your selection and close the menu.

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5.2.2 Preset key

1. Select PRESET KEY following the procedure in paragraph 5.2.1 on page 5-3.

2. Press the [MENU] key to open the menu.

3. Press

to select MENU, and then press or to select PRESET.

PRESENT

CUSTOM

CUSTOM2

CUSTOM3

ADJUST THE KNOBS AND FUNCTION KEYS TO THE DESIRED SETTING. THEN PRESS A CUSTOM MODE KEY TO SAVE THE SETTING.

FUNCTION KEY: ENTRY MENU: END

COMN HORZ VERT ES PRESET SYS

MODE SECTOR TRAIN RANGE TILT SPEED

300˚

250˚

0˚

30˚

180˚

250

120

30˚

20˚

FAST

NORM

Figure 5-5 PRESET menu

4. Set the [MODE], [SECTOR], [TRAIN], [RANGE], [TILT] and [FAST SCAN] controls according

to target fish or fishing area.

5. Press the CUSTOM MODE keys [1], [2] or [3] to program. You are asked if you want to save

the settings to the custom key pressed. (In the example, the custom key [1] was pressed.)

SAVE THE SETTING TO CUSTOM1 KEY?

NO YES

: CHANGE MENU: END

6. Press to select YES.

7. Press the [MENU] key. The message “PRGM SET” appears at the screen top.

8. Press the [ME N U ] key to fi n i sh .

Activating custom mode

1. Press appropriate CUSTOM MODE key. The indication CUSTOM1, CUSTOM2 or

CUSTOM3 appears at the top of the screen depending on key pressed.

2. To escape from the custom mode operation, operate any of the controls among [MODE],

[SECTOR], [TRAIN], [RANGE], [TILT] and [FAST SCAN].

5-5

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5.2.3 Short- cut key

The default settings are key [1], interference rejector; key [2], signal level, and key [3], background color. The operator may change their functions as desired.

Note:

In the combination modes the short-cut key operation is only possible from the main window.

1. Select SHORT-CUT following the procedure in paragraph 5.2.1 on page 5-3.

2. Press the [MENU] key to open the menu.

3. Press

to select MENU, and then press or to select SHORT-CUT.

KEY 1

KEY 2

KEY 3

SELECT FUNCTION TO BE ALLOCATED TO EACH CUSTOM KEY. CUSTOM KEY MAY BE USED AS A PRESET KEY.

: SELECT

COMN HORZ VERT ES SHORT-CUT SYS

IR SIG LEVEL BKGD WHITE MARKER COLOR RES.COLOR TRACK

: CHANGE

MENU: END

Figure 5-6 SHORT-CUT menu

4. Press

5. Press

or to select key to preset. For example select KEY 1.

or to select item.

6. Press the [MENU] key to finish.

Activating a short-cut key

1. Press a CUSTOM MODE key, and the dialog box programmed for the custom key pressed

appears. The dialog box below is for the interference rejector.

INT REJ: OFF ON

2. Press or to select option desir ed

3. Press the [MENU] key to close the dialog box.

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5.3 SYS Menu

This menu provides items which may be set according to operator’s preference. A demonstration mode is provided to acquaint you with the many functions of this equipment, and it may be used without connection of the transducer.

1. Press the [MENU] key to open the menu.

2. Press

3. Press

4. Press

to select MENU, and then press to select SYS. to select GO TO SYS MENU.

to select YES.

** SYSTEM MENU **

SYSTEM SETTING:

RANGE-SONAR MODE RANGE-VERTICAL MODE RANGE-E/S MODE COLOR PALETTE LANGUAGE SYSTEM BACKUP LOAD BACKUP DATA HEADING OFFSET ADJ MOTION SENSOR TX FREQ ADJUST TEST TEST PATTERN DEMO MODE DEFAULT

Adjusted at installation. See installation manual.

See Chapter 6.

: SELECT

: MENU DISPLAY

MENU: END

Figure 5-7 System menu

5. Press

6. Press

7. Press

or to select item desired. or to open corresponding dialog box. or to select option.

8. Press the [MENU] key twice to register your selection and close the menu.

5-7

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SYSTEM SETTING 1 menu

1. Display the SYSTEM menu and press or to select SYSTEM SETTING.

2. Press

3. Press

4. Press

to MENU.

to select “1.”

** SYSTEM SETTING 1 **

MENU 1 2

SHIP'S POSITION : CURRENT DATA : HEADING INDICATION : TRUE AZ NORTH MARK : OFF ON CSE DATA : NAV GYRO NAV DATA : GPS LoranC LoranA DR DECCA OTHERS TVG CORRECTION : OFF 1/2 1/1 UNIT :

TEMP

EVENT MARK INFO : CUSTOM KEY : STABILIZER : RED STRESS FUNC : ETA MARK :

L/L LOP OFF FLOW FROM FLOW TO

m ft fa HIRO P/B

: ˚C ˚F

OFF ON PRESET KEY OFF ON OFF ON OFF 10sec 30sec 1min 3min 6min

SHORT-CUT KEY

: SELECT

: CHANGE MENU: END

Figure 5-8 System setting 1 menu

SYSTEM SETTING 1 menu description

SHIP’S POSITION

or Loran LOP. (The connected navigator must be capable of displaying L/L or LOP.) The default setting is latitude and longitude. Position data required.

CURRENT DATA:

the current is flowing; FLOW TO shows the direction the current is heading. The default setting is OFF. Requires connection of a current indicator.

: Chooses how to displays ship’s position; latitude and longitude, Decca LOP

Turns current data (tide) on or off. FLOW FROM shows from what direction

Current Vector

FLOW FROM FLOW TO

5-8

Figure 5-9 Current vector

Page 89

HEADING INDICATION: Selects heading indication format, true (default setting) or azimuth, for the echo sounder and vertical fan modes. The default setting is TRUE. Requires heading data.

NORTH MARK: Turns the north marker on or off (default setting). Requires heading data. CSE DATA: Selects heading data source, navigator or gyrocompass, to draw ship’s track. The

default setting is navigator. For heading sensor or gyrocompass connection, choose gyrocompass.

NAV DATA: Selects source of position data, GPS, Loran C, Loran A, DR (Dead Reckoning), Decca or Others (for equipment not shown, receives talker only). Default setting is GPS.

TVG CORRECTION: Changes TVG curve to compensate for attenuation absorption of ultrasonic wave in water. OFF (default setting), standard TVG curve; 1/2, 1/2 of the theoretical absorption value added to TVG curve, and 1/1, full theoretical absorption value added to TVG curve.

UNIT: Selects unit of depth measurement: meters (default setting), feet, fathoms, passi/braza, Hiro.

TEMP: Selects unit of water temperature measurement: °C (default sett ing), °F. EVENT MARK INFO: Turn on to output event marker position to external equipment. Requires

heading and latitude and longitude data from external equipment. Default setting is OFF. CUSTOM KEY: Selects function of custom mode keys: preset (default setting) or short-cut. For

details see paragraph 5.2 on page 5.3. STABILIZER: Select ON (default setting) to compensate for effects of ship’s pitching and rolling.

Requires motion sensor. RED STRESS FUNC: Turn on to stretch strongest strength echo in range direction. Default

setting is OFF. ETA MARK: A vector line extends from the own ship marker in direction of ship’s bow on the

horizontal mode display. The tip of the line shows the estimated time of arrival after the selected ETA time elapses, using the current ship’s speed. ETA is calculated every second considering tilt and detection range. This function requires speed input.

ETA marker

Figure 5-10 ETA marker

5-9

Page 90

SYSTEM SETTING 2 menu description

** SYSTEM SETTING 2 **

SPEED ALARM/MESSAGE SOUNDOME SER.NO DEFAULT SETTING : NO YES

MAXIMUM ALLOWABLE SPEED IS 15 KNOTS WHILE THE SOUNDDOME IS BEING RETRACTED. IF VESSEL HAS RAPID ACCELERATION CAPABILITIES, AUTO RETRACTION SETTINGS OF 10-12 KNOTS ARE MANDATORY TO AVOID CATASTROPHIC DAMAGE TO SOUNDOME ASSY. ANY PHYSICAL DAMAGE TO THE SOUNDOME ASSY. IS CONSIDERED ABUSE AND IS NOT A WARRANTY ISSUE.

1 2

OFF (OFF, 5-15 kt)AUTO RETRACTION : OFF ON

: ~999 1000~

: SELECT

: CHANGE MENU: END

Figure 5-11 System setting 2 menu

AUTO RETRACTION:

Turn on to automatically retract the transducer when ship’s speed exceeds the speed set here. The ship’s speed range for automatic retraction is from 5 to 15 knots. The default setting is OFF (no automatic retraction). Requires speed input.

Note:

The transducer may be retracted at a speed other than the intended one when ship’s

speed data is erroneous.

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Page 91

SPEED ALARM MESSAGE:

Turn on (default setting) to display speed alarm message and sound the audio alarm when ship’s speed exceeds allowable speed for a given transducer operation. The audio alarm can be silenced with the [R/B] key.

[↓] pressed to lower transducer

Speed above 15 kts

Message 1 appears. Reduce s peed below 15 kts to restore normal operation.

Tran sducer being lowered

Speed over 15 kts Message 1 appears and loweri ng continues.

Tran sducer lowered

Speed above 20 kts

Message 2 appears accompanied with the aural alarm. Reduce the speed below 20 kts to restore nor mal operation.

[↑] pressed to raise transducer

Message 1 appears accompanied with the aural alarm.

Speed above 15 kts

Transducer is n ot raise d. Red uce th e spee d below 15 kts to eras e the message and restore normal o peration. Then, press [ to raise the transducer.

Tran sducer being raised

Speed above 15 kts

SHIPS SPEED EXCEEDS 15 kt. (SLOW DOWN UNDER 15 kt WHEN MOVING TRANSDUCER UNIT.)

PRESS R/B KEY TO SILENCE ALARM.

Message 1 appears and raising continues. Reduce the sp eed below 15 kts to erase the message and restore normal operation.

TRANSDUCER REMAINS LOWERED. (REDUCE SHIP'S SPEED AND PRESS

↑

TO RETRACT IT.)

PRESS R/B KEY TO SILENCE ALARM.

↑

] again

Message 1 Message 2

SOUNDOME SER.NO:

Set according to serial no. of soundome. Note that the setting is not

cleared when default settings are restored.

Note:

Failure to set the soundome no. correctly will damage the transducer.

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Page 92

DEFAULT SETTING:

Select YES and press the [MENU] key to restore all default system menu settings. Several beeps sound while default settings are being restored and then normal operation is restored.

** FACTORY SETTING **

NO YESARE YOU SURE? :

NOTE: ALL THE SYSTEM SETTING WILL BE CHANGED TO FACTORY

SETTING.

: CHANGE MENU: END

Figure 5-12 FACTORY SETTING menu

5-12

Page 93

5.3.2 Sonar ( horizontal) mode range set tings

The user may preset horizontal mode ranges as desired.

1. Select RANGE-SONAR MODE at the SYS menu and then press

** RANGE-SONAR MODE **

1:10 (10-1600m)

2:20 3:40 4:60 5:80 6 : 120 7 : 160 8 : 200

9 : 250 10 : 300 11 : 400 12 : 500 13 : 600 14 : 800 15 : 1000

TRACK DISP : 500 (500-5000m)

DEFAULT SETTING : NO YES

: SELECT

: CHANGE MENU: END

Figure 5-13 Range-sonar mode menu

2. Press

3. Press

or to select range number desired.

or to set range. The setting range depends on the transducer used. The figure

above shows the default settings for the 60 kHz transducer.

4. To set the range of the video plotter display, press with

or .

to select TRACK DISP and set range

5. To restore default horizontal mode range settings, select DEFAULT SETTING, press select YES and press the [MENU] key.

6. Press the [MENU] key to register settings and close the menu.

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Page 94

5.3.3 Vertical fan mode range settings

As with the horizontal mode, the user may preset the vertical fan mode’s ranges.

1. Select RANGE-VER MODE at the SYS menu and then press

** RANGE-VER MODE **

1:10 (10-600m)

2:20 3:30 4:40 5:60 6:80 7 : 100 8 : 120

9 : 160 10 : 200 11 : 250 12 : 300 13 : 400 14 : 500 15 : 600

DEFAULT SETTING : NO YES

: SELECT

: CHANGE MENU: END

Figure 5-14 Range-ver mode menu

2. Press

3. Press

or to select range number desired.

or to set range.

4. To restore default vertical fan mode range settings, select DEFAULT SETTING, press select YES and press the [MENU] key.

5. Press the [MENU] key to register settings and close the menu.

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Page 95

5.3.4 Echo sounde r mode range settings

As with the horizontal and vertical fan modes, the user may preset the echo sounder mode’s ranges.

1. Select RANGE-E/S MODE at the SYS menu and then press

** RANGE-E/S MODE **

1:10 (10-600m)

2:20 3:30 4:40 5:60 6:80 7 : 100 8 : 120

9 : 160 10 : 200 11 : 250 12 : 300 13 : 400 14 : 500 15 : 600

DEFAULT SETTING : NO YES

: SELECT

: CHANGE MENU: END

Figure 5-15 Range-E/S mode menu

2. Press

3. Press

or to select range number desired.

or to set range. The setting range depends on the transducer used.

4. To restore default echo sounder mode range settings, select DEFAULT SETTING, press to select YES and press the [MENU] key.

5. Press the [MENU] key to register settings and close the menu.

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5.3.5 Color palette

The color palette lets the user change the color of echoes, background, text and menu as desired.

Cursor

** COLOR PALETTE **

21 3456789101112131415

ECHO

Arrow

TEXTBKGD MENU

BKGD1

COLOR : ECHO 1

R :3 G:6

B:13

BKGD2

TEXTBKGD MENU

BKGD3

DEFAULT SETTING

: SELECT : CHANGE

: NO YES (ECHO & BKGD COLORS WILL BE CHANGED.)

MENU: END

Figure 5-16 Color palette

1. Press

or to place the cursor and arrow on the item to change. Pressing shifts the

arrow and cursor from left to right and top to bottom.

2. Press

3. Press

or to select R(red), G(green) or B(blue) as appropriate.

or to adjust color.

4. Press the [MENU] key to register your settings and close the menu.

Note:

To restore default color settings, select DEFAULT SETTING, press press the [MENU] key. A few beeps sound w hile the default colors are being restored and then normal operation is restored.

to select YES, and

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5.3.6 Language

Menu language can selected to English or Japanese and the default language is English.

** LANGUAGE **

LANGUAGE:

: CHANGE MENU: END

JAPANESE ENGLISH

Figure 5-17 Language menu

5.3.7 System backup

User settings can be backed up with the menu item SYSTEM BACKUP.

** SYSTEM BACKUP **

NO YESARE YOU SURE? :

NOTE: OVERWRITE PREVIOUS BACKUP DATA.

: CHANGE MENU: END

Figure 5-18 System backup menu

5.3.8 Loading backup data

System data may be loaded from the LOAD BACKUP DATA menu.

** LOAD BACKUP DATA **

NO YESARE YOU SURE? :

NOTE: OVERWRITE CURRENT SETTINGS.

: CHANGE MENU: END

Figure 5-19 Load backup data menu

5-17

Page 98

5.3.9 Transducer frequency adjustment

If the CH-250 is receiving interference from a video sounder or other sonar on board your ship, adjust the frequency of the CH-250’s transducer to reduce the interference.

** TX FREQ ADJUST **

60.0 kHz (57-63 kHz)FREQ SHIFT :

: CHANGE MENU: END

Figure 5-20 TX frequency adjustment menu

5.3.10 Demonstration mode

The demonstration mode provides a simulated sonar picture which helps you become acquainted with how your sonar works. Connection of the transducer is not required. All controls are operational.

1. Display the SYS menu.

2. Select DEMO MODE.

3. Press

to open the menu.

** DEMO MODE **

OFF ONDEMO MODE :

: CHANGE MENU: END

Figure 5-21 Demo mode menu

4. Select OFF or ON as appropriate and press the [MENU] key. (DEMO) appears at the top of

the screen when the demonstration mode is active.

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5.3.11 Restoring all default settings

The item DEFAULT lets you restore all default menu settings. Select YES and press the [MENU] key to restore all default settings. Note that settings stored in SYSTEM BACKUP are not disturbed.

** DEFAULT **

NO YESARE YOU SURE? :

NOTE: RESET ALL THE SETTINGS INCLUDED IN THE SYSTEM MENU

TO DEFAULT.

: CHANGE MENU: END

Figure 5-22 Default menu

CAUTION

All default settings will be restored. If necessary jot down settings which must be restored.

5-19

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Furuno CH250 User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

FOREWORD

SYSTEM CONFIGURATION

1. OPERATIONAL OVERVIEW

1.1 Control Description

1.2 Remote Controller

1.3 Turning the Power On/Off

1.4 Raising, Lowering the Transducer

1.5 Adjusting Screen Brilliance, Panel Dimmer

1.6 Selecting a Display

1.7 Adjusting the Gain

1.8 Basic Menu Operation

2. HORIZONTAL MODE

2.1 Operational Overview

2.2 Typical Horizontal Mod e Display

2.3 Selecting the Range

2.4 Selecting Sector Width

2.5 Selecting Train Center

2.6 Selecting the Tilt Angle

2.7 Selecting the Training Speed

2.8 Finding Echo Position with the Cursor

2.9 Event Marker

2.10 Range and Bearing Markers

2.11 Adjusting the Picture

2.12 Target Lock

2.13 Horizo n t al Men u Overview

2.14 Interp retin g the Horizontal Display

3. VERTICAL FAN MODE

3.1 Operational Overview

3.2 Typical Vertical Fan Mode Display

3.3 Selecting the Range

3.4 Selecting Train Center

3.5 Selecting Display Sector

3.6 Selecting Sector Center

3.7 Selecting the Training Speed

3.8 Finding Echo Position with the Cursor

3.9 Event Marker

3.10 Depth and Horizontal Range Markers

3.11 Adjusting the Picture

3.12 Vertical Menu Overview

3.13 Interp retin g the Vertical Fan Display

4. ECHO SOUNDER MODE

4.1 Operational Overview

4.2 Typical Echo Sounder Display

4.3 Selecting the Range

4.4 Train Direction

4.5 Selecting Tilt Angle

4.6 Selecting Picture Advance Speed

4.7 Measuring Range by Cursor

4.8 Event Marker

4.9 Range Marker

4.10 Adjusting th e Pictu re

4.11 Echo Sounder Menu Overview

5. MENU OPERATION

5.1 COMN Menu

5.2 Short-cut Menu, Preset Menu

5.3 SYS Menu