Furuno CH-300 User Manual

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Page 1

DUAL-FREQUENCY SEARCHLIGHT SONAR

CH-300

Page 2

9-52 Ashihara-cho,9-52 Ashihara-cho,

00015190000

**00015190000

00015190000

**00015190000

OME

13250

**OME

13250

**OME

13250

**OME

13250

Nishinomiya 662-8580, JAPANNishinomiya 662-8580, JAPAN

Telephone :Telephone : 0798-65-21110798-65-2111 FaxFax 0798-65-42000798-65-4200

ll rights reserved.

Printed in JapanPrinted in Japan

Pub. No.Pub. No. OME-13250OME-13250

Your Local Agent/Dealer Your Local Agent/Dealer

IRST EDITION :

IRST EDITION : APRAPR.. 20052005

A1A1 :: APRAPR.. 19, 200519, 2005

Thepaperusedinthismanual iselementalchlorinefree.

(( DAMIDAMI ))

CH-300CH-300

* 0 0 0 1 5 1 9 0 0 0 0 ** 0 0 0 1 5 1 9 0 0 0 0 *

* O M E 1 3 2 5 0 A 1 0 ** O M E 1 3 2 5 0 A 1 0 *

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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 protects 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 damage to the equipment.

Retract the transducer before turning off the power.

Damage to the equipment may result. Wait until the transducer retraction switch [

↑

] lights steadily and then turn off the power.

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 damage to the equipment.

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.

Set the gain properly.

No picture appears if the gain setting is too low, and noise appears when the gain is too high. If the gain is set improperly, the depth indication may be wrong, resulting in a potentially dangerous situation if the vessel is navigated by monitoring the depth indication.

Gain too high Proper gain Gain too low

Warning labels

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

WARNING

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

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

DISPLAY UNIT

Name: Warning Label (2) Type: 86-003-1001-1 Code No.: 100-236-741

Disposal of oil and its container

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

Storage

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

WARNING

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

HULL UNIT

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

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.

Page 5

FOREWORD ........................................................................................................ vi

SYSTEM CONFIGURATION..............................................................................viii

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

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

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

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

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

1.3.2 Power off.........................................................................................................1-3

1.4 Raising, Lowering the Transducer.............................................................................. 1-4

1.4.1 Lowering the transducer.................................................................................. 1-4

1.4.2 Raising the transducer .................................................................................... 1-4

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

1.6 Choosing a Display.................................................................................................... 1-6

1.7 Choosing a Frequency............................................................................................... 1-9

1.8 Mix Display .............................................................................................................. 1-11

1.9 Adjusting the Gain ...................................................................................................1-13

1.10 Menu Overview........................................................................................................ 1-15

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

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

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

2.3 Choosing a Range..................................................................................................... 2-3

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

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

2.6 Choosing a Tilt Angle ................................................................................................. 2-5

2.6.1 Tilt angle for surface fish ................................................................................. 2-6

2.6.2 Distinguishing fish echo from bottom echo in coastal waters ........................... 2-6

2.6.3 Suitable tilt angle ............................................................................................. 2-8

2.7 Choosing Training Speed........................................................................................... 2-9

2.8 Changing Training Direction....................................................................................... 2-9

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

2.10 Event Marker ........................................................................................................... 2-11

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

2.12 Adjusting the Picture................................................................................................ 2-13

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

2.12.2 Suppressing bottom tail................................................................................. 2-14

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

2.12.4 Erasing weak echoes .................................................................................... 2-16

2.12.5 Suppressing interference from marine life .....................................................2-17

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

2.13 Target Lock.............................................................................................................. 2-19

2.13.1 Choosing a target lock mode......................................................................... 2-19

2.13.2 Position mode ............................................................................................... 2-19

2.13.3 Echo mode.................................................................................................... 2-20

iii

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2.14 Horizontal Menu Overview.........................................................................................2-22

2.14.1 Horizontal menu description............................................................................2-22

2.15 Interpreting the Horizontal Display.............................................................................2-24

2.15.1 How the horizontal mode picture is painted.....................................................2-24

2.15.2 Sample displays ..............................................................................................2-25

2.15.3 Combination display examples ........................................................................2-29

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

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

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

3.3 Choosing a Range .......................................................................................................3-3

3.4 Choosing Train Center.................................................................................................3-4

3.5 Choosing Display Sector..............................................................................................3-5

3.6 Choosing Sector Center...............................................................................................3-6

3.7 Choosing Training Speed.............................................................................................3-7

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

3.9 Changing Training Direction.........................................................................................3-7

3.10 Event Marker................................................................................................................3-8

3.10.1 Deleting all event markers from the vertical scan display..................................3-9

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

3.12 Adjusting the Picture..................................................................................................3-10

3.12.1 Displaying weak echoes clearly.......................................................................3-10

3.12.2 Suppressing noise and interference................................................................3-11

3.13 Vertical Menu Overview .............................................................................................3-12

3.13.1 Vertical menu description................................................................................3-12

3.14 Interpreting the Vertical Scan Display........................................................................3-13

3.14.1 How the vertical scan mode picture is painted................................................3-13

3.14.2 Sample displays ..............................................................................................3-14

3.14.3 Horizontal/vertical scan port-starboard, Horizontal/vertical scan

upward-downward display...............................................................................3-16

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

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

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

4.3 Choosing a Range .......................................................................................................4-3

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

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

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

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

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

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

4.8.2 Deleting all event markers from echo sounder display......................................4-6

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

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

4.10.1 Displaying weak echoes clearly.........................................................................4-7

4.10.2 Finding echo strength (A-scope display)...........................................................4-9

4.10.3 Suppressing interference and noise..................................................................4-9

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

4.11.1 Echo sounder menu description......................................................................4-10

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

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

5.1.1 COM1 menu description.................................................................................. 5-2

5.2 COM2 Menu ..............................................................................................................5-3

5.2.1 Displaying the COM2 menu............................................................................. 5-3

5.2.2 COM2 menu description.................................................................................. 5-3

5.3 Short-cut Menu, Preset Menu ....................................................................................5-4

5.3.1 Choosing short-cut or preset ........................................................................... 5-4

5.3.2 Preset key ....................................................................................................... 5-5

5.3.3 Short-cut key................................................................................................... 5-7

5.4 SYSTEM Menu.......................................................................................................... 5-9

5.4.1 How to open the SYSTEM menu..................................................................... 5-9

5.4.2 System setting menus ................................................................................... 5-10

5.4.3 Sonar (horizontal) mode range settings......................................................... 5-14

5.4.4 Vertical scan mode range settings................................................................. 5-15

5.4.5 Echo sounder mode range settings............................................................... 5-16

5.4.6 Track range settings...................................................................................... 5-17

5.4.7 Color palette.................................................................................................. 5-18

5.4.8 Language...................................................................................................... 5-19

5.4.9 System backup.............................................................................................. 5-19

5.4.10 Loading backup data..................................................................................... 5-19

5.4.11 Transducer frequency adjustment ................................................................. 5-20

5.4.12 Demonstration mode ..................................................................................... 5-20

5.4.13 Restoring all default settings ......................................................................... 5-21

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Page 8

FOREWORD

Thank you for purchasing the CH-300 Dual-Frequency Searchlight Sonar. We are confident you will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manuf acture of marine electronics equipment for half a cent ury, 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 saf et y information and operating and m aintenance instructions set forth in this manual bef ore 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-300 is a dual-frequency searchlight sonar. Consisting of a monitor unit, cont rol unit, transceiver unit and hull unit, it displays underwater objects on the monitor of choice, in 8 or 16 colors according to received echo strengths.

The main features are

• Horizontal and vertical section modes for detecting, searching, tracking and monitoring

fish school.

• 12 display modes for virtually any fishing applic ation.

• Mix mode discriminates small fish.

• Fish or bottom echo can be displayed in white to distinguish bottom fish.

• Hull unit automatically raises the tr ansducer when ship’s speed exceeds prescribed

speed.

• User-programmed function keys provide one-touch access to desired function.

• Two types of target lock for effective tracking of fish school.

• Digital display of position, speed, course, water temperature, depth, tide speed and

direction. (Requires appropriate sensors.)

Page 9

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 COM1 menu). Damage to the train-tilt section may result if it is operated with maximum transmitter power while the ship is dry-docked.

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

reason for the corrosion and attach a zinc plate to the hull unit as an anticorrosion measure if necessary.

Notice

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

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

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

notice.

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

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

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

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

modification of the equipment or claims of loss of profit by a third party.

vii

Page 10

SYSTEM CONFIGURATION

INTERFACE UNIT IF-8000

CONTROL UNIT/MONITOR UNIT CH-302/MU-100C

Navigator

Control Unit

MONITOR UNIT MU-100C

Display Unit

VGA Ext. Monitor

Remote

Controller

CH-256

TRANSCEIVER UNIT CH-303

CONTROL UNIT CH-302

SPEAKER

Speaker

Motion Sensor

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.

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

not supplied. Connect external monitor (user supply) and control

unit to the interface unit.

When Monitor MU-151C is connected, this interface is not necessary.

Satellite

Compass

12-24 VDC

HULL UNIT CH-304 CH-305

12-24 VDC

viii

System configuration

Page 11

1. OPERATIONAL OVERVIEW

1.1 Control Description

Selects center bearing of training sector.

Selects detection range.

Selects training speed (horizontal mode)/ train center (vertical scan)/picture

Turns the power on/off.

Raises the transducer.

Adjusts receiver sensitivity.

Selects width of training sector.

advancement speed (echo sounder).

Reverses scanning direction.

Controls tilt angle. Selects center direction of

the vertical scanning sector.

Adjusts display brilliance.

Omnipad

Shifts cursor. Selects menu items, options.

XDR

GAIN(PUSH)

POWER

SECTOR TRAIN

MIX

DISPLAY MODE

Lowers the transducer.

Turns mix display on/off.

Low freq/High freq selection

Switches control between main and

Horizontal Combination*

Horizontal

Horizontal Expansion

MIX

DISPLAY MODE

sub windows.

MAIN

SUB

Echo Sounder

Vertical Scan

* Horizontal/History, Horizontal/Vertical scan, Horizontal/Vertical zoom, Horizontal/Video plotter

RANGE

MAIN

SUB

FULL HALF

FAST

SCAN

CUSTOM MODE

Provide short-cut key or one-touch setup.

Turns target lock on/off.

Switches training sector to 360° (horizontal mode), or 180° (vertical scan mode).

Horizontal Mode

REVERSE

TILT

TARGET BRILL

Tilt

Sounding beam

R/B

EVENT

Opens/closes menu.

Inscribes/erases event markers.

Inscribes/erases range and bearing markers.

Vertical Scan Mode

BOW

Echo Sounder Mode

Control unit

1-1

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1. OPERATIONAL OVERVIEW

1.2 Remote Controller

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

Choose tilt angle.

Choose display range.

Chooses sounding area: Full circle 360° (horizontal mode) Half circle 180° (vertical scan mode).

Enables/disables target lock.

Remote controller

1-2

Page 13

1. OPERATIONAL OVERVIEW

1.3 Turning the Power On/Off

1.3.1 Power on

This sonar has a demonstration mode which provides simulated operation without the transducer. For further details see page 5-20.

Press the POWER switch on the control unit till you hear a “click.” A beep sounds, the lamp

above the switch lights and the startup display appears. Four seconds later the last-used display appears.

MODEL: CH-300 **/***kHz

**: Frequency

Startup displa

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

Note 2: If the language selection window appears, see paragraph 5.4.8.

1.3.2 Power off

1. Check that the speed is under 15 knots*, and then press the [↑] switch on the control

panel to retract the transducer. The lamp above the switch blinks while the transducer is being raised and lights steadily when it is fully raised. *The transducer may be damaged if it is raised when the speed is more than 15 kts.

Transducer status indicator

• Up arrow: Filled when transducer is fully retracted into the tank.

• Down arrow: Filled when transducer is 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 is fully retracted, the up arrow lights and the down arrow becomes hollow.

Transducer status indicator

2. Confirm that the lamp above the [↑

] switch lights steadily (meaning the transducer is

fully retracted) and then press the POWER switch.

Note 1: The transducer is automatically retracted into the tank even if the equipment is

turned off 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 power to

allow the equipment to memorize settings (and start up with them at the next power up). No harm will result to the equipment if this is not done.

1-3

Page 14

1. OPERATIONAL OVERVIEW

1.4 Raising, Lowering the Transducer

1.4.1 Lowering the transducer

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.

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

1.4.2 Raising the transducer

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

Note 1: The automatic transducer retraction feature, which requires speed input, raises the transducer when the ship’s speed exceeds the operator-set speed (between 5 and 15 knots). If speed data is erroneous the transducer may be rais ed at a speed different from the speed specified. For further details about the automatic transducer retraction, see AUTO RETRACTION on page 5-13.

Note 2: An audio alarm may sound when the ship’s speed exceeds the speed specified. For further details, see SPEED ALARM/MESSAGE on page 5-13.

1-4

Page 15

1. OPERATIONAL OVERVIEW

1.5 Adjusting Screen Brilliance, Panel Dimmer

Screen brilliance can be adjusted in 10 steps and panel dimmer (backlighting) in five.

1. Press the BRILL key to open the dialog box for screen brilliance and panel dimmer

adjustment. Do the next step within four seconds, otherwise the dialog box will be erased.

BRILL:3

DIMMER:3

Brilliance, panel dimmer dialog box

2. Press ◄ or ► as appropriate to adjust screen brilliance (0 is the lowest brilliance; 9 the

highest). Note that continuous pressing of the BRILL key also changes the brilliance

level.

3. Press ◄ or ► as appropriate to adjust the panel dimmer (0 is the lowest level; 4 is the highest).

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

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

Note 1: The brilliance of a commercial monitor cannot be adjusted with the BRILL key. Use

the associated control on the monitor.

Note 2: 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 to raise the brilliance.

1-5

Page 16

1. OPERATIONAL OVERVIEW

1.6 Choosing a Display

12 displays are provided; choose the one which best suits your current needs. For a description of each display, see Chapter 2.

Single-frequency displays

Key

Display

NAV

DATA

HORIZONTAL

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

NAV

DATA

VERTICAL SCAN

Key

Display

NAV

DATA

EXPANDED HORIZONTAL

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

NAV

DATA

A-SCOPE

DISPLAY

Water temp/depth

ECHO SOUNDER

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

Single-frequency displays

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

1-6

Page 17

Dual-frequency displays

1. OPERATIONAL OVERVIEW

Key

DUAL-FREQ HORIZONTAL

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

x2 x2

DUAL-FREQ. VERTICAL SCAN

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

Display Display

NAV

DATA

Key

DUAL-FREQ. HORIZ. EXPANSION

Expansion of dual-freq. horizontal display. (Chapter 2)

NAV

DATA

A-SCOPE

Depth/Temp. Display

DUAL-FREQ. ECHO SOUNDER

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

Dual-frequency displays

1-7

Page 18

1. OPERATIONAL OVERVIEW

Combination displays

Key

Choose

Display

NAV DATA

HORIZONTAL/HISTORY

The horizontal picture appears in the main window; the history picture in the sub window. Useful for showing history of fish movement, distribution. (Chapter 2)

NAV DATA

HORIZONTAL/VERTICAL SCAN

Key

Choose

Display

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/VERTICAL ZOOM

The horizontal picture appears in the main window; the vertical fan picture in the sub window. (Chapter 3)

The horizontal picture appears in the main window; vertical zoom picture in the sub window. (Chapter 3)

Combination displays

1-8

Page 19

1. OPERATIONAL OVERVIEW

1.7 Choosing a Frequency

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

Item Low frequency High frequency

Long-range detection PREFERABLE

Attenuation loss is small on low frequency.

Use in shallow waters NOT RECOMMENDED

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

Detection range (detection “leaks”)

Detection of bottom fish

Detection of bait fish NOT RECOMMENDED

Affected by air bubbles from other vessels

PREFERABLE Detection area is wide (beam width is wide).

NOT RECOMMENDED Fish echo and bottom echo overlap. (Wide beam width)

Not suited for this purpose. (Bait fish are not easily detected with low frequency.)

NOT RECOMMENDED Low frequency is easily interfered by cavitation from other vessels.

NOT RECOMMENDED Attenuation loss is great on high frequency.

PREFERABLE Bottom echo is less prominent because of narrow beam width so fish echoes are easy to find.

NOT RECOMMENDED Detection area is narrow (beam width is narrow).

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

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

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

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

High frequency

Low frequency

1-9

Page 20

1. OPERATIONAL OVERVIEW

Frequency selection and mode

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

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

high-and low-frequency displays alternately.

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

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

* Dual-frequency horizontal display, Dual-frequency horizontal expansion display,

Dual-frequency echo sounder display.

LOW-FREQ.

DISPLAY

MIX

DISPLAY

LF/HF key

HIGH-FREQ.

DISPLAY

Frequency switching in dual-frequency combinat ion display, mix display ON

Combination display (vertical scan combination):

Main window is active:

The LF/HF key changes the frequency of the main window from low

to high alternately. Sub window is active:

The LF/HF key changes the frequency of the sub window from low to

high alternately.

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



MIX

DISPLAY

1-10

Page 21

1. OPERATIONAL OVERVIEW

1.8 Mix Display

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

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

the high frequency echo is displayed.

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

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

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

High-frequency display

GAIN (HI)

GAIN (LO)

Mix display

How the mix display works

1-11

Page 22

1. OPERATIONAL OVERVIEW

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

Gain adjustment

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

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

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



To activate the mix mode, press the MIX key. How to display the mix display depends on the

display mode in use.

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

display alternately.

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

dual-frequency display alternately.

LOW-FREQ.

DISPLAY

HIGH-FREQ.

DISPLAY

MIX key

HIGH-FREQ.

DISPLAY

How the MIX key works in dual-frequency mode

Combination display (vertical scan combination:

Main window is active:

The MIX key changes the frequency of the main window from low to

high alternately. Sub window is active:

The MIX key changes the frequency of the sub window from low to

high alternately.

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



MIX

DISPLAY

1-12

Page 23

1. OPERATIONAL OVERVIEW

1.9 Adjusting the Gain

The GAIN control adjusts the sensitivity of the receiver. Normally, the control is adjusted so

that the bottom echo is displayed in reddish-brown mixed with red. Initially set the gain between “4” and “6” and then fine tune according to fishing ground, etc.

Too Low Proper

Too High

How to adjust the gain

Single-frequency or combination display

When using both high and low frequency in the horizontal/vertical scan display, refer to the procedure on the next page.

1. Push the GAIN control.

HIGH FREQ GAIN: 5.0 (0-10)

2. Turn the GAIN control to adjust the gain (range: 0-10).

△

GAIN 5.3

Gain setting

Location of gain setting indication

3. Press the MENU key to close the gain setting window. Note that it is not necessary to press the MENU key – the window will automatically if no operation is detected for four seconds.

Note 1: Step 1 is not necessary if the menu item GAIN SETTING PROTECT (SYSTEM

SETTING 2 menu) is set for OFF.

Note 2: You can switch control between the main and sub windows in the horizontal/vertical scan display with the MAIN/SUB key.

1-13

Page 24

1. OPERATIONAL OVERVIEW

Dual-frequency display

1. Push the GAIN control.

HIGH FREQ GAIN :

LOW FREQ GAIN : 5.0 (0-10)

PUSH GAIN KNOB TO SPECIFY THE FREQ ROTATE GAIN KNOB TO CHANGE THE FREQ

5.0 (0-10)

2. Push the GAIN control to choose the frequency for which you want to adjust the gain.

3. Rotate the GAIN control to adjust the gain (range: 0-10).



GAIN(HI) 5.0 GAIN(LO) 5.3

Gain setting high and low frequencies

Location of gain setting indications on dual-frequency display

4. Press the MENU key to close the gain setting window.

1-14

Page 25

1. OPERATIONAL OVERVIEW

1.10 Menu Overview

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.)

DELETING TRACK NO

MIX MODE

WHITE MARKER OFF SIG LEVEL OFF COLOR 16 BKGD COLOR 2

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

STANDARD

: CHANGE MENU: END

COM2 menu

2. The last-used menu is displayed. To choose a different menu, press ▲ to choose

MENU and then press ◄ or ► to choose menu desired.

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

provided.

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

DELETING TRACK

NO YES

Dialog box for deleting track

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

6. Press ▲ or ▼ to return to the menu, or press the MENU key to register your selection

and close the menu.

1-15

Page 26

1. OPERATIONAL OVERVIEW

This page intentionally left blank.

1-16

Page 27

2. HORIZONTAL MODE

2.1 Operational Overview

The figure below shows the typical horizontal mode operating sequence.

Set center bearing of train sector.

Set range.

MAIN

SUB

FULL

HALF

RANGE

FAST

SCAN

CUSTOM MODE

REVERSE

TILT

TARGET

Set tilt angle.

BRILL

R/B

EVENT

11.

(ex. TVG) as required.

Turn on the power.

XDR

POWER

6(a).

Set sector bearing

range.

Adjust gain.

GAIN(PUSH)

SECTOR TRAIN

MIX

DISPLAY MODE

Adjust menu settings

Lower the

transducer.

Select appropriate

horizontal mode.

Control panel

Adjust screen

brilliance.

6(b).

Change sector bearing

range to 360°.

10.

Measure range and

bearing to target with cursor.

2-1

Page 28

2. HORIZONTAL MODE

2.2 Typical Horizontal Mode Display

Press the

(horizontal mode) key. Each press chooses the single frequency or dual-

frequency horizontal mode display alternately.

NAV

DATA

Single-freq. Display

Dual-freq. Display

Switching between single-frequency horizontal and dual-frequency horizontal displays

Tilt angle indicator

* 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

Horizontal max. range

Range and bearing markers

Vertical max.

Tilt angle

Range

depth

Interference rejector

Frequency

(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°

Sweep indicator (Shows train position in horizontal mode.)

→ ↓

B7°

Range and bearing markers data

34° 12. 343' N 134° 34. 213' W

CSE 357° SPD 9.9 kt

DEP 35.1 m TMP 12.3°C

CUR 11.0°

CUR 11.0˚

2.0 kt

2.0 kt GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m

COLOR

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.

2-2

Single-frequency horizontal display

Page 29

2. HORIZONTAL MODE

2.3 Choosing a Range

The RANGE control chooses the detection (display) range. Choose the range according to either the fish species being searched or the dept h desired. 15 ranges are available and minimum and maximum ranges depend on the transducer used.

SEA SURFACE

Range indicated on the screen.

BOTTOM

Range description

Range indicated on the screen.

Default horizontal mode range sett ings

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 m 20 40 60 80 100 120 160 200 250 300 400 500 600 800 1200 ft 50 100 200 300 400 500 600 700 800 1000 1200 1500 2000 3000 4000

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 briefly appears in large characters at the screen top. Range is always displa yed at the right-hand corner of the screen.

Note 1: Unit of range measurement may be chosen from among meters, feet, fathoms, passi/braza or Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page 5-11.

Note 2: Ranges may be freely preset as desired. For details see page 5-14.

2-3

Page 30

2. HORIZONTAL MODE

2.4 Choosing Sector Width

You may set the width of the scanned sector.

Display sector

96°

Sector width

The SECTOR control chooses the width of the scanned sector among the sixteen positions

shown in the table below. Clockwise rotation of the control increases the sector width; counterclockwise rotation decreases it.

Sector width (°)

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

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

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

Sector set with SECTOR control

FULL/HALF

key

Full circle

FULL/HALF

key

Half circle

168

How the FULL/HALF key works

2-4

Page 31

2. HORIZONTAL MODE

2.5 Choosing Train Center

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

0° (360°) → 6° → 12° → 18° → ... 354°

Train indicator

Sector

Train center

2.6 Choosing a Tilt Angle

The tilt angle shown 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). Choose tilt angle depending on target fish. For surface fish choose a narrow angle (about 5°) and for bottom fish, a wide angle (about 40°).

Soundome

+5°

0° Horizontal direction

Transducer

Tilt angle setting range

90° Vertical direction

2-5

Page 32

2. HORIZONTAL MODE

2.6.1 Tilt angle for surface fish

Sound emitted from the sonar transducer forms an oval-shaped beam with a width of approximately 10° (–3 dB, full scan, vertical beam width on 85 kHz) in the vertical direction (vertical 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 effectively, the tilt angle is usually set between 5° and 7° so the upper portion of the beam becomes almost parallel with the sea surface. When the sea is rough, the tilt angle is slightly increased to lessen the affect of sea surface reflections.

Sea surface

Tilt angle 0°

Tilt angle 5-7°

10°

Sea surface

10°

Tilt angle

2.6.2 Distinguishi ng fi sh echo from bottom echo in coastal waters

In coastal operations the bottom reflection is prominent so it is important to be able to distinguish fish echoes from the bott om echo. The information below will help you to do this.

Tilt angle and bottom echo

Case 1 - Tilt angle 30° to 40°: The bottom echo, captured by the vertical beam width (10°

at -3dB full circle, 85kHz), is displayed “ring-shaped” and in strong col ors.

Case 2 - Tilt angle 10° to 20°: The bottom echo is displa yed wider and in weak colors as the distance to the bottom increases.

Case 3 - Tilt angle 0° to 5°: The bottom echo is either weak or is not displayed even if the vertical beam width captures the bottom echo, because the distance t o the bottom is too far.

2-6

Page 33

2. HORIZONTAL MODE

How to discriminate fish echoes from the bottom

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

Case 1

(Case 1, 2 and 3 are relative to the bottom pictured above.)

Case 2

Case 3

Detecting beam and fish position

Using the above three cases, fish schools will be displayed as belo w.

Fish school "a"

Bottom

Fish school "b"

Fish school "a"

Case 1

Bottom

Fish school "b"

Case 2 Case 3

Fish school "b"

Fish echo and tilt angle

Fish school "a"

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

°): Fish school “a” and “b” are just above the bottom echo. °): Fish school “b” is clearly seen. Fish school “a” is behind

the bottom echo therefore it is difficult t o discern.

Case 3(Tilt angle 0° to 5

°): Bottom echo is weak so fish school “b” is easily seen.

Fish school “a” is masked by the bottom echo so it is difficult to discern. However, larger fish schools may appear in this condition.

2-7

Page 34

2. HORIZONTAL MODE

2.6.3 Suitable tilt angle

The figure below illustrates the relationship among tilt angle (0, 5, 10 and 15 degrees), depth and detection range. Refer to it to find out the suitable tilt angle for a given depth/detection range.

Tilt angle and beam coverage (frequency 85 kHz, vertical beamwidth 10

20(40) 40(80)

60(120)

80(160)

100(200)

Depth (m)

200(400)

Vertical width of sonar beam

100

(200)

100 m100 m

17 m

200

(400)

200 m

34 m

300

(600)

300 m

51 m

° at -3 dB

400

(800)

)

Range (m)

Tilt angle and beam coverage

Frequency and detection range

Frequency Vertical beam width 100 m 200 m 300 m

85 kHz 10°（-3 dB） 17 m 34 m 51 m 60 kHz 14°（-3 dB） 24 m 48 m 72 m 153 kHz 5°（-3 dB） 9 m 18 m 27 m 215 kHz 4°（-3 dB） 7 m 14 m 21 m

2-8

Page 35

2. HORIZONTAL MODE

2.7 Choosing Training Speed

The training speed chooses 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.

Normal (6°) : 60 transmissions required to complete full 360° picture (default setting). High (12°) : On ranges higher than 160 m, 30 transmissions required to complete the full 360° picture. The time necessary to train a full circle depends on frequency, range and mode. The table below shows the time required to complete one full circle in the horizontal mode.

Single frequency

Range (m) 20 40 60 80 100 120 160 200 250 300 400 500 600 800 1200

Time (sec)

Range (m) 20 40 60 80 100 120 160 200 250 300 400 500 600 800 1200

Time (sec)

* NS, Normal Speed, HS, High Speed

NS* 9 9 9 9 9 11 14 17 21 25 33 41 49 65 97

HS* 9 9 9 9 9 11 12 14 16 18 22 26 30 38 54

Dual frequency

NS* 11 11 11 11 11 12 15 18 22 26 34 42 50 66 98

HS* 11 11 11 11 11 12 14 15 17 19 23 27 31 39 55

2.8 Changing Training Direction

The training direction may be reversed to reconfirm fish echoes. Press the REVERSE key

to reverse training direction between counterclockwise and clockwise alternately. “REVERSE” appears at the top of the screen for three seconds when training direction is reversed.

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Page 36

2. HORIZONTAL MODE

2.9 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

Location of cursor position data

2-10

Page 37

2. HORIZONTAL MODE

2.10 Event Marker

The event marker functions to m ark important locations on the horizontal mode display, and five event markers may be inscribed. Press the EVENT key to inscribe the event marker. Each time the key is pressed the “latest event marker” ( and all previously entered event markers are shown by the “previous event marker” (+). Five event markers may be entered and when the capacity for event markers is reached the eldest event marker is erased from the screen to make room for the latest.

Note 1: Event markers cannot be entered from the history or video plotter display (other display in horizontal combination displays). Event markers may only be entered from the horizontal display. Note 2: The tilt angle must be less than 75-degrees. Correct event marker position data is not possible with the tilt angle higher tha n 75-degrees.

Note 3: Event marker position may be output to external equipment. See paragraph 5.4.2 Note 4: Event markers are only erased from the currently used displa y (horizontal, vertical,

echo sounder).

Entering an event mark

⊕) is inscribed at the cursor location

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"

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.

How to use the event marker

2-11

Page 38

2. HORIZONTAL MODE

Deleting all event markers from the horizontal display

To delete all event markers inscribed on the horizontal mode display, do the following:

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? NO YES

3. Press ► to choose YES and then press the MENU key.

2.11 Depth and Horizontal Range Markers

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

Note: Range and bearing markers cannot be inscribed on the history display or video

plotter display.

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.

Bearing marker

Range marker

Range and bearing markers

Dashed lines show horizontal range and depth

NA V

DATA

Range and bearing markers data

→: Horizontal range ↓: Depth

B: Bearing from ship's bow

of range marker.

2-12

Page 39

2. HORIZONTAL MODE

2.12 Adjusting the Picture

2.12.1 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 reduces rather than when the gain is decreased.

Maximum TX power Minimum TX power

Sonar image and TX power setting

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ to choose the COM1 menu.

TX POWER MAX PULSELENGTH LONG TX RATE 10 INT REJECT OFF AGC OFF

AUDIO LEVEL 0

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

: CHANGE MENU: END

COM1 menu

3. Press ▲ to choose TX POWER and then press ►. The following dialog box appears.

TX POWER

MAX

MIN

4. Press ► to choose 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.

2-13

Page 40

2. HORIZONTAL MODE

2.12.2 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, choose the short Tx pulselength on the COM1 menu to decrease the tail of bottom reflections.

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ to choose the COM1 menu.

3. Press ▲ or ▼ to choose PULSELENGTH and then press ►. The following dialog box appears.

PULSELENGTH

LONG

SHORT

4. Press ► to choose SHORT.

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

2.12.3 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 irrespective of the ranges to them.

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

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.

How TVG works

Note: Excessive TVG may eliminate short-range echoes.

2-14

Page 41

2. HORIZONTAL MODE

To adjust TVG:

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ or ► to choose HORZ.

TVG LEVEL 4.0 TVG DISTANCE 4.0 RES. COLOR LOG CLUTTER 0 TARGET KEY ECHO

LOCK MODE AUTO

AUTO TILT OFF

: SELECT

COM1 VERT ES PRESET SY SCOM2 HORZ

: CHANGE MENU: END

HORZ menu

3. Press ▲ or ▼ to choose TVG DISTANCE and press ►. The following dialog box appears.

TVG DISTANCE

4.0

200m

4. Press ◄ or ► to adjust TVG distance 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

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Meters 3 8 20 40 60 100 130 160 200 250 320 Feet 10 30 70 130 210 330 410 520 660 820 1040

Passi/braza 2 5 10 20 40 60 80 100 120 150 180

Hiro 2 5 10 20 40 60 80 100 130 170 210

. . . .

10.0

1000 3280

600

660

2-15

Page 42

2. HORIZONTAL MODE

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

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

7. 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.

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

9. Watch a distant fish echo which is approaching own ship, adjusting the tilt angle so the fish echo 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.

2.12.4 Erasing weak echoes

Weak echoes such as interference can be erased from the screen, using the “signal level” feature. This is useful when you want to observe a fish school echo.

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU.

3. Press ◄ to choose COM2.

4. Press ▲ or ▼ to choose SIG LEVEL.

5. Press ► 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 choose 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.

2-16

Page 43

2. HORIZONTAL MODE

2.12.5 Suppressing i nterference from marine life

If you are fishing in an area where there are a lot of fishing vessels, you may receive interference from other vessels’ sonar or echo sounder. Further, electrical interference onboard own ship may generate interference. To suppress this type of interference use the interference rejector.

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

Interference from other sonars, marine life

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ to choose the COM1 menu.

3. Press ▲ or ▼ to choose INT REJECT and then press ►. The following dialog box appears.

INT REJECT

OFF LoFREQ HiFREQ BOTH

4. Press ◄ or ► to choose the frequency where you want to suppress interference. When the interference suppressor is turned on

appears at the top of the screen.

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

Note that the interference rejector cannot be turned on/off independently for each frequency in case of the dual-frequency display.

2-17

Page 44

2. HORIZONTAL MODE

2.12.6 Enlarging fish echoes (horizontal expansion display)

Fish echoes may be enlarged 1.5 times by using the horizontal expansion display. Press the

key to activate the horizontal expansion display (single frequency). Then, the horizontal

display is expanded at the center of training direction, bow direction.

Train center direction Position after expansion Remarks

318° –42° Moves to screen bottom For viewing forward 48° –123° Moves to left side of screen For viewing starboard side 138° –222° Moves to screen top For viewing aft 228° -312° Moves to right side of screen For viewing port side

You can switch between the single-frequency horizontal expansion display and the dual-frequency horizontal expansion display alternately with the

NAV

DATA

key as shown below.

Single-freq. Display

Dual-freq. Display

Switching between single-frequency horizontal expansion and dual-frequency horizontal expansion displays

Frequency

Train position

Own ship marker

Cursor position data

→14 ↓ 12

B46° +

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

CUR 11.0°

CUR 11.0˚

2.0 kt

2.0 kt GAIN 5.3

2-18

Cursor

Horizontal expansion display

TVG LEVEL 4.0 DISTANCE 200 m COLOR

Page 45

2. HORIZONTAL MODE

2.13 Target Lock

Two types of target lock modes are available.

Position: Tracks stationary position (such as a reef) using position data from a

navigator. Available in the horizontal mode only.

Echo: Tracks fish echo either manually or automatically. Available in the

horizontal mode only.

2.13.1 Choosing a target lock mode

1. Press the MENU key to open the menu.

2. Press▲ to choose MENU

3. Press ◄ or ► to choose the HORZ menu.

4. Press ▲ or ▼ to choose TARGET KEY.

5. Press ◄ or ► to show following dialog box.

TARGET KEY

POS ECHO

6. Press ◄ or ► to choose option desired.

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

2.13.2 Position mode

This mode tracks a stationary position (such as a reef) using position data fed from a navigator.

Note 1: This function is inoperative in the echo sounder mode.

Note 2: This mode requires position data. When there is no position data the message “NO

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

Note 3: The tilt angle must be less than 75 degrees to use this feature.

1. Use the Omnipad to choose the location to track.

2. 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. SECTOR, TILT and FULL/HALF controls are inoperative since

their functions are inoperative during position mode target lock.

The detection area is fixed at 48-degrees. Tilt angle and train are automatically adjusted to track the target even if your vessel is moving.

2-19

Page 46

2. HORIZONTAL MODE

Target lock indicator

Target lock marker

Target lock indicator

3. 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.

Note 1: Target lock is automatically canceled if position data is lost.

Note 2: When target lock is activated in the vertical scan combination display, the vertical

bearing cursor automatically shows target direction. When target lock is canceled the vertical bearing cursor is returned to its previous position. The vertical scan display operates like the vertical search features when the target lock is active. For further details about the vertical search feature, see page 5-8.

2.13.3 Echo mode

The echo mode tracks a fish school either automatically or manually. The default setting is automatic, and you can choose automatic or manual with “LOCK MODE” in the HORZ menu. Note that this mode is not available in the vertical scan or echo sounder mode

Automatic tracking

The automatic echo target lock function automatically tracks a fish school appearing in the operator-chosen target lock zone. I

1. 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

2. Use the Omnipad to set the detection area: ▲ of ▼ to set the outer boundary; ◄ or ► to set the inner boundary. Use the SECTOR and TRAIN controls to adjust the detection area. Do not include bottom echoes in the zone, so that target lock will not be activated by bottom echoes.

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2. HORIZONTAL MODE

Outer boundary

Detection area

Target lock indicator

NAV

DATA

Inner boundary

Target lock area

When a target of red or reddish-brown color is detected in the zone, the target lock indicator blinks, the buzzer sounds and the detection area disappears. When a tracked target is lost, the operation shown below is repeated.

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

3. If the target does not appear even though the tilt angle is changed, adjust the SECTOR and TRAIN controls to change the detection area.

4. To turn off 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 tracking

1. Set LOCK MODE to MANUAL on the HORZ menu.

2. 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

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.

is automatically changed to continue tracking as shown right.

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

appears momentarily.

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2. HORIZONTAL MODE

2.14 Horizontal Menu Overview

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

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ or ► to choose the HORZ menu.

TVG LEVEL 4.0 TVG DISTANCE 4.0 RES. COLOR LOG CLUTTER 0 TARGET KEY ECHO

LOCK MODE AUTO

AUTO TILT OFF

: SELECT

COM1 VERT ES PRESET SY SCOM2 HORZ

: CHANGE MENU: END

HORZ menu

3. Press ▲ or ▼ to choose item desired.

4. Press ► to show corresponding dialog box.

5. Press ◄ or ► to choose option desired.

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

2.14.1 Horizontal menu description

TVG LEVEL: Compensates for propagation loss of sound in water. Default setting is 4.0.

For further details, see paragraph 2.12.3.

TVG DISTANCE: As above. Default setting is 4.0.

RES. COLOR: Sets transfer characteristics of input signal level versus display echo level.

Echo 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

setting, and is suitable for general use.

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

weak echoes such as plankton. SQUARE: Strong echoes are emphasized more than in LINEAR. CUBE: Strong echoes are emphasized even more than in SQUARE.

CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the

screen as a large number or random dots. This noise can be suppressed. The higher the number (setting) the weaker the echoes which are erased.

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2. HORIZONTAL MODE

TARGET KEY: Chooses target lock function between position and echo. Default setting is

ECHO. For further details see paragraph 2.13.

LOCK MODE: Chooses how to track fish echo in ”echo” target lock; automatically or

manually. Default setting is AUTO. For further details see paragraph 2.13.

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

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2. HORIZONTAL MODE

2.15 Interpreting the Horizontal Display

This section provides information necessary for interpreting the horizontal display.

2.15.1 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

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

How the horizontal mode picture is painted

Train: 6°*

Tilt: θ

*12° When high speed training is selected.

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2. HORIZONTAL MODE

2.15.2 Sample displays

This section provides various examples of horizontal mode displays. The appearance of actual fish echoes will vary according to factors such as transmission frequency, gain and TVG settings, and bottom composition and contour.

Bottom echoes

When the tilt angle is changed, the bottom echo illustrated below will appear on the display. When the tilt is decrease (toward 0°), the bottom trace becomes winder and weaker. By observing the bottom condition on the display, the skipper can prevent net damage.

(A) Flat bottom

Tilt angle: 10° to 15°

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

(B) Flat bottom

Tilt angle: 20° or more

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

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

Bottom

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

Bottom echoes

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2. HORIZONTAL MODE

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

2-26

Fish schools

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.

Page 53

2. HORIZONTAL MODE

Sea surface reflections

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

Sea surface

Tilt angle indication

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 distinguishes from a fish school. A wake contains many air bubbles which attenuate ultrasonic energy, making it difficult to sound beyond the wake.

Other ship

Own ship

Own ship's screw noise

Wake produced by other ship

Wake

Own ship's screw noise

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

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2. HORIZONTAL MODE

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.

Sidelobe echoes

Noise

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 the figure below. This interference can be suppressed by changing the Tx rate on the COM1 menu.

2-28

Interference from sonars

Page 55

2.15.3 Combination display examples

How to choose a combination display

2. HORIZONTAL MODE

1. Press the

key to show the combination display selection window.

HORZ/HISTORY

HORZ/VERT

HORZ/VERT ZOOM

HORZ/PLOTTER

2. Use ▲ or ▼ to choose the combination display desired. You may also use the

key

to choose a display.

3. Press the MENU key to close the selection window, or wait four seconds for it to close

automatically.

Note 1: Combination displays may be disabled on the SYSTEM SETTING 2 menu. Only

those displays which are turned on appear in the combination display selection window.

Note 2: If all combination displays are turned off the vertical scan combination display is

automatically shown.



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2. HORIZONTAL MODE

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.

Frequency

Tilt angle

Cursor position data

Own ship marker

Train position

Cursor

→17 ↓ 14

B148° +

Horizontal Display

Range

R 40 m T 40°

Tilt angle indicator

34° 12. 343' N 134° 34. 213' W

CSE 357° SPD 9.9 kt

HIstory Display

Interference rej. ON

Target lock indicator Transducer status

indicator

Position in latitude*, longitude*

Course*, speed*

Fish echo

Bottom echo

* Requires appropriate sensor.

2-30

Horizontal/history display

Page 57

2. HORIZONTAL MODE

Horizontal/video plotter display

The horizontal display appears in the main window; the video plotter display, which traces 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, when entered on the video plotter display 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. Like with the horizontal display you can inscribed five event markers on the video plotter display.

To display track on the horizontal display, the tilt angle must be less than 75 degrees.

You may switch control between the horizontal display and the video plotter display with the

MAIN/SUB key. The message MAIN WINDOW CONTROLLABLE or SUB WINDOW

CONTROLLABLE appears with each pressing of the key. A red rectangle circumscribes the sub window when it is chosen. With the video plotter display selected you may change its

range with the RANGE control.

Note: Controls other than RANGE may only be operated from the main window. When you

attempt to operate them when the sub window is chosen the message SELECT MAIN WINDOW appears.

Cursor position data

Own ship marker

Train position

Track*

Event marker

Cursor

→18 ↓ 15

B154° +

→15 B 195°

Event marker data

* Requires appropriate sensor.

Horizontal Display

Frequency

Tilt angle

R 40 m T 40°

Range

34° 12. 343' N 134° 34. 213' W

Tilt angle indicator

CSE 357° SPD 9.9 kt

Track*

Video Plotter Display

500

Interference rej. ON Target lock indicator

Transducer status indicator

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

Sonar range marker (Radius changes with video plotter range.)

Event marker (Entered from horizontal mode)

Scale

Horizontal/Video Plotter display

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2. HORIZONTAL MODE

This page intentionally left blank.

2-32

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3. VERTICAL SCAN MODE

3.1 Operational Overview

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

Set train bearing.

Set tilt angle.

11.

Adjust menu settings

(ex. TVG) as required.

BRILL

R/B

EVENT

Turn on the power.

XDR

POWER

7(a).

Set scanning sector.

Adjust gain.

GAIN(PUSH)

SECTOR TRAIN

DISPLAY MODE

MIX

MAIN

SUB

FULL HALF

Set range.

RANGE

FAST

SCAN

CUSTOM MODE

REVERSE

TILT

TARGET

Lower the transducer.

Select appropriate

vertical scan mode.

Control panel

Adjust screen

brilliance.

7(b).

Select training sector 180°.

10.

Measure range and

bearing to target with cursor.

3-1

Page 60

3. VERTICAL SCAN MODE

3.2 Typical Vertical Scan Mode Display

Press the

key to show the vertical scan display. You can switch between the single-frequency vertical scan display and the dual-frequency vertical scan display alternately with the

key as shown below.

NAV

DATA

Single-freq. Display

NAV

DATA

Dual-freq. Display

Switching between single-frequency vertical sca n and dual-frequency vertical scan displays

Bearing indicator (Shows training direction.)

FORE

Own ship PORT

AFT

Interference rejector ON

Cursor position data

+→6 ↓ 145

Fish echo

Cursor

Horizontal range

Bottom echo

Depth

Horizontal marker

STARBOARD

Training indicator

Heading*

340

FORE AFT

Vertical range

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

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

35.1 m

12.3°C

Frequency

Position in latitude*, longitude*

Course*, speed*

Depth

Water temperature*

Tide direction*, tide speed*

Gain setting TVG level,

distance settings

Color bar

3-2

* Requires appropriate Sector center indicator

Sweep indicator (Shows tilt angle in vertical fan mode.)

Event marker

Vertical range scale

Horizontal range marker

sensor.

Single-frequency vertical scan display

Page 61

3. VERTICAL SCAN MODE

3.3 Choosing a Range

The RANGE control chooses the detection (display) range, in 15 settings. Choose the

range according to either the fish species being searched or the depth desired. Each time the control is operated the newly chosen 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

Range concept

Default vertical scan mode range settings

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

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

passi/braza or Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page 5-11.

Note 2: Ranges may be freely preset as desired. For details see page 5-15.

3-3

Page 62

3. VERTICAL SCAN MODE

3.4 Choosing Train Center

The TRAIN control determines the bearing of the vertical scan 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

Train indicator

Train 0° Train 90° Train 180°

FORE

STBD

Train indicator and display

AFT

3-4

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3. VERTICAL SCAN MODE

3.5 Choosing Display Sector

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

24°

Sector (Shown: 24°)

Sector

The SECTOR control chooses 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

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

(°)

One-touch selection of 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°

FULL/HALF

key

Half circle

FULL/HALF

180°

0°

key

How the FULL/HALF key works

180°

0°

120°

3-5

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3. VERTICAL SCAN MODE

3.6 Choosing Sector Center

The center direction of the sounding beam in the vertical direction can be changed with the

TILT control. The setting range is 0° to 180° in increments of 6°. Choose 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

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

Sector range

180°

0˚

Sector center

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

How automatic shifting works

Page 65

3. VERTICAL SCAN MODE

3.7 Choosing Training Speed

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

Location of cursor position data

3.9 Changing Training Direction

The training direction may be reversed to reconfirm fish echoes. Press the REVERSE key

to reverse training direction between counterclockwise and clockwise alternately. “REVERSE” appears at the top of the screen for three seconds when training direction is reversed.

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3. VERTICAL SCAN MODE

3.10 Event Marker

The event marker functions to mark important locations on the vertical scan display, and five

event markers may be inscribed. Each time the EVENT key is pressed the “latest event

marker” ( 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. Note that the marker cannot be inscribed from the vertical scan display in the horizontal/vertical scan display.

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

⊕) is inscribed at the cursor location and all previously entered event markers are

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

"Previous event marker"

"Latest event marker"

How to inscribe, delete the event markers

Display area

NAV

DATA

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

3-8

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3. VERTICAL SCAN MODE

3.10.1 Deleting all event markers from the vertical scan display

All event markers inscribed on the vertical scan display may be deleted 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? NO YES

3. Press ► to choose YES and press the MENU key.

3.11 Depth and Horizontal Range Markers

The depth and horizontal range markers function to measure the horizontal range and depth to a desired echo.

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

display when it is in the sub window (Horizontal/vertical scan display). Inscribe the markers from the horizontal display to show it in the vertical scan display.

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

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 the depth and horizontal range markers, press the R/B key again, or place the cursor on the depth or horizontal range marker and press the R/B key.

Horizontal range

105

Depth marker

NAV

DATA

Depth

marker

Depth and horizontal range markers

3-9

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3. VERTICAL SCAN MODE

3.12 Adjusting the Picture

3.12.1 Displaying weak echoes clearly

To adjust TVG:

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ or ► to choose the VERT menu.

TVG LEVEL 4.0

TVG DISTANCE 4.0 RES. COLOR LOG CLUTTER 0 HORZ SCAN RATE VERT SCAN RATE HORZ RANGE

: SELECT

COM1 VERT ES PRESET SY SCOM2 HORZ

1 1 x1

: CHANGE MENU: END

VERT menu

3. Press ▲ or ▼ to choose TVG DISTANCE and then press ► to show the following dialog box.

TVG DISTANCE

4.0

3-10

200

Page 69

3. VERTICAL SCAN MODE

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 Passi/braza 2 5 10 20 40 60 80 100 120 150 180

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 to the VERT menu.

6. To suppress reflections by the sea surface or plankton, choose 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.

10.0

1000

3280 600

660

Wrong Correct Level too high Distance too high

Examples of proper and improper TVG

3.12.2 Suppressing noi se and interference

You may encounter occasional noise or intermittent 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 COM1 menu to suppress it. Note that the interference rejector cannot be turned on/off independently for each frequency in case of the dual-frequency display.

Interference rejector ON

Interference (In this display, interference shows itself every 6°.)

Appearance of interference

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3. VERTICAL SCAN MODE

3.13 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 ▲ to choose MENU and then press ◄ or ► to choose the VERT menu.

TVG LEVEL 4.0

TVG DISTANCE 4.0 RES. COLOR LOG CLUTTER 0 HORZ SCAN RATE VERT SCAN RATE HORZ RANGE

: SELECT

COM1 VERT ES PRESET SY SCOM2 HORZ

1 1 x1

: CHANGE MENU: END

VERT menu

3. Press ▲ or ▼ to choose item desired.

4. Press ► to show corresponding dialog box.

5. Press ◄ or ► or to choose option desired.

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

3.13.1 Vertical menu description

TVG LEVEL: Compensates for propagation loss of sound in water. The default setting is

4.0.

TVG DISTANCE: As above. Default setting is 4.0.

RES. COLOR: Sets transfer characteristics of input signal level versus display echo level.

Echo 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

for general use.

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

weak echoes such as plankton.

SQUARE: Strong echoes are emphasized more than in LINEAR.

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

CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the

screen as a large number of random dots. The higher the number (setting) the weaker the echoes which are erased.

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3. VERTICAL SCAN MODE

HORZ SCAN RATE: Sets the scan rat e (1, 2, 3, 4) for the horizontal display in the horizontal/vertical scan combination displ ay. For example, if the scan for the horizontal display is “4” and the scan rate for the vertical scan display is “2”, then for every four scans at the horizontal display two scans are produced at t he vertical scan display. Raise the figure to give importance to the horizontal display.

VERT SCAN RATE: Sets the scan rat e (1, 2, 3, 4) for the vertical scan display in the horizontal/vertical scan combination display. Raise the figure to give importance to the vertical display.

HORZ RANGE: You may choose the horizontal range expansion factor for the horizontal expansion display from x1 or x2. Note that this feat ure cannot be adjusted when the vertical search mode or target lock is active.

3.14 Interpreting the Vertical Scan Display

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

3.14.1 How the vertical scan mode picture is painted

The sounding beam is emitted and the information (target echoes) obtained by the beam appears in the corresponding sector as it appear s on the sonar mode. The difference is that the training is performed only in vertical directi on. 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 chosen 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

(1) Bearing of the sounding beam

180°

(2) Sector center, (3) Display area

0°

Sector center 90°. Display range 24°.

How the vertical scan mode picture is painted

3-13

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3. VERTICAL SCAN MODE

3.14.2 Sample displays

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

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

Own ship

FORE

Fish school

FORE

Fish school

AFT

Picture appearance when passing over fish schools

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3. VERTICAL SCAN MODE

Display of net hauling

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

Own ship Aft

FORE

Net

AFT

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 COM1 menu) or lowering the range may lessen this effect.

PORT STBD

False echo

Bottom

Fish

False echoes

Range

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3. VERTICAL SCAN MODE

3.14.3 Horizontal/vertical scan port-starboard, Horizontal/vertical scan upward-downward display

Frequency

Tilt angle

Cursor data

Vertical scan bearing cursor

Range

Tilt angle indicator

Own ship marker

Train position

Cursor

→17 ↓ 14

B156° +

Horizontal Display

(main window)

R 40 m T 40°

34° 12. 343' N 134° 34. 213' W

CSE 357° SPD 9.9 KT

AFT FORE

50 50

Vertical Scan Display

(sub window)

100

Interference rejector ON

Target lock indicator

Transducer status indicator Position in latitude*,

longitude*

Course*, speed*

Frequency

Sweep indicator (tilt angle)

* Requires appropriate sensor.

Horizontal/vertical scan display (port-starboard direction)

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3. VERTICAL SCAN MODE

Horizontal Display (main window)

Vertical Scan Display (sub window)

→16 ↓ 13 B 288° +

R 60 m T 40°

///// /////

34° 12. 343' N 134° 34. 213' W

CSE 357 SPD 9.9 kt

FOREAFT

100100

100

DEP 35.1 m TMP 12.3°C

Horizontal/vertical scan display (upward-downward direction)

Press the

key to choose and display the horizontal/vertical scan display. The horizontal

display appears in the main window; the vertical scan 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 choose 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

LF/HF, MIX, 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 scan display: Sets direction of bearing cursor shown on the horizontal mode display.

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3. VERTICAL SCAN MODE

SECTOR control

For the vertical scan display: When the display sector is 6° (minimum) the tilt angle of the horizontal and vertical scan modes are interlocked and each transmission on the horizontal display is reflected on the vertical scan 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.

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4. ECHO SOUNDER MODE

4.1 Operational Overview

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

Set sector.

Set train bearing.

Set tilt angle.

Turn on the power.

XDR

POWER

Adjust gain.

GAIN(PUSH)

SECTOR TRAIN

DISPLAY MODE

MIX

MAIN

SUB

FULL HALF

Set range.

RANGE

FAST

SCAN

CUSTOM MODE

REVERSE

TILT

TARGET

12.

Adjust menu settings (turn on A-scope display, etc.).

BRILL

R/B

EVENT

Lower the transducer.

Select echo

sounder mode.

Control panel

Adjust screen

brilliance.

10.

Set picture advance speed.

11.

Measure range to fish

school with cursor.

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4. ECHO SOUNDER MODE

4.2 Typical Echo Sounder Display

Press the

key to display the echo sounder picture. You can switch between the single-frequency echo sounder display and the dual-frequency echo sounder display alternately with the

key as shown below.

NAV

DATA

A-SCOPE

Depth/Temp. Display

Single-freq. Display

Depth/Temp. Display

Dual-freq. Display

NAV

DATA

A-SCOPE

Switching between single-frequency echo sounder and dual-frequency echo sounder displays

Tilt angle indicator (Shows tilt angle of transducer.)

Tilt angle

Heading

340°

Range

R 10 m T 60°

Transducer status indication

34° 12. 343' N 134° 34. 213' W

CSE 357° SPD 9.9 kt

CUR 11.0°

2.0 kt

GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m

Frequency

Position in latitude*, longitude*

Course*, speed*

Tide direction*, tide speed*

Gain setting

TVG level, distance settings

Interference rejector ON

Cursor position

Minute marker

Fish echo

Cursor

Range

Bottom echo

+ 4

↓

Bearing indicator (Shows train direction.)

4-2

Color bar

DEP

6.5 m

Depth (When the tilt angle is 90 deg., the depth measured by this sonar is displayed inside a rectangle.)

TMP

12. 3°C

Water temperature*

Event marker

* Requires appropriate sensor.

Range marker

Range scale

Single-frequency echo sounder display

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4. ECHO SOUNDER MODE

4.3 Choosing a Range

The RANGE control chooses the detection (display) range, in 15 settings. Choose the

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

Surface

RANGE m

Bottom

Range concept

Default echo sounder mode range settings

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

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: Unit of range measurement may be selected for meters, feet, fathoms, passi/braza

or Hiro (Japanese). For details see UNIT on page 5-11.

Note 2: Ranges may be freely preset as desired. For details see page 5-16.

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4. ECHO SOUNDER MODE

4.4 Train Direction

The sounding beam may be directed toward fore, aft, port or starboard. Operate the TRAIN control to choose 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°

Train indicator and display

4.5 Choosing a Tilt Angle

The transducer can pointed directly toward the bottom or forward of the ship. Operate the

TILT control to choose an appropriate tilt angle. The available tilt angle is 0° (horizontal direction) to 90° (vertical) in increments of 1°

display to the right of “T”.

. Chosen tilt angle appears at the top of the

4.6 Choosing a Picture Advance Speed

The picture advance speed determines how quickly the vertical scan lines run across the screen, from right to left. When choosing 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 SCA N key to show the following dialog box.

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

2. Press ◄ or ► (FAST SCAN key may also be used) to select a speed. The fractions in

dialog 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.

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4. ECHO SOUNDER MODE

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

DA T A

A-SCOPE

DISPLAY

Depth, Water Temp. Display

Cursor

How to measure range with the cursor

4.8 Event Marker

The event marker functions to mark im portant locations on t he echo sounder display, and five event markers may be inscribed. Each time the EVENT key is pressed the “latest event marker” ( 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.

Note 1: The event marker inscribed on the echo sounder display will also be inscribed on the horizontal and video plotter displays, at own ship position always.

Note 2: Event marker position can be output to external equipment. For details see TARGET L/L on page 5-10.

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

⊕) is inscribed at the cursor location and all previously entered event markers are

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4. ECHO SOUNDER MODE

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 on the echo sounder dislay, place the cursor outside the display area and press the EVENT key.

How to inscribe, delete the event markers

4.8.2 Deleting all event markers from echo sounder display

Event markers inscribed on the echo sounder display may be erased collectively 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? NO YES

3. Press ► to choose YES and press the MENU key.

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4. ECHO SOUNDER MODE

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

Range marker

4.10 Adjusting the Picture

4.10.1 Displaying weak echoes clearly

To adjust TVG:

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU and then press ◄ or ► to choose the ES menu.

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4. ECHO SOUNDER MODE

TVG LEVEL

TVG DISTANCE RES. COLOR LOG CLUTTER 0

A-SCOPE OFF

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

4.0

: CHANGE

MENU: END

ES menu

3. Press ▲ or ▼ to choose TVG DISTANCE and press ►. The following dialog box appears.

TVG DISTANCE

4.0

200m

4. Press ◄ or ►or to adjust TVG distance.

TVG Distance Setting

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Meters 3 8 20 40 60 100 130 160 200 250 320

Feet 10 30 70 130 210 330 410 520 660 820 1040

Passi/braza 2 5 10 20 40 60 80 100 120 150 180 Hiro 2 5 10 20 40 60 80 100 130 170 210

. . . .

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

6. To suppress reflections by the sea surface or plankton, choose 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

3280

600 660

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4. ECHO SOUNDER MODE

4.10.2 Finding echo strength ( A-scope displa y)

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 ▲ to choose MENU.

3. Press ◄ or ► or to choose ES.

4. Press ▼ to choose A-SCOPE.

5. Press ◄ or ► to open the dialog box.

A-SCOPE

OFF

6. Press ► to choose ON.

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

Echo sounder picture

A-scope display

Depth, Water Temp. Display

A-scope display

4.10.3 Suppressing i nterference and noise

You may encounter occasional noise or intermittent interference on the display. 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 COM1 menu to suppress it. Note that the interference rejector cannot be turned on/off independently for each frequency in case of the dual-frequency display.

Interference from other sounder

Interference from other sonar

Interference

Electrical interference

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4. ECHO SOUNDER MODE

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 ▲ to choose MENU and then press ◄ or ► or to choose the ES menu.

TVG LEVEL

TVG DISTANCE RES. COLOR LOG CLUTTER 0

A-SCOPE OFF

: SELECT

COM1 HORZ VERT ES PRESET SYSCOM2

4.0

: CHANGE

MENU: END

ES menu

3. Press ▲ or ▼ to choose item desired.

4. Press ► to show corresponding dialog box.

5. Press ◄ or ► to choose option desired.

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

4.11.1 Echo sounder menu description

TVG LEVEL: Compensates for propagation loss of sound in water. See paragraph 4.10.1.

Default setting is 4.0.

TVG DISTANCE: As above. Default setting is 4.0.

RES. COLOR: Sets transfer characteristics of input signal level versus display echo level.

Echo 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 for

general use.

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

weak echoes such as plankton.

SQUARE: Strong echoes are emphasized more than in LINEAR.

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

CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the

screen as a large number of random dots. The higher the number (setting) the weaker the

echoes which are erased.

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

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5. MENU OPERATION

This chapter provides menu operating information on menus not previously discussed: COM1, COM2, PRESET (or SHORT-CUT, depending on the setting of CUSTOM KEY on the SYSTEM SETTING 1 menu) and SYS (System) menu.

5.1 COM1 Menu

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU, and then press ◄ to choose COM1.

TX POWER MAX PULSELENGTH LONG TX RATE 10 INT REJECT OFF AGC OFF

AUDIO LEVEL 0

: SELECT

3. Press ▲ or ▼ to choose item; ◄ or ► to open associated dialog box.

4. Press ◄ or ► to choose option desired.

5. Press ▲ or ▼ to return to the COM1 menu, or press the MENU key to register your

selection and close the menu.

COM1 HORZ VERT ES PRESET SY SCOM2

: CHANGE MENU: END

COM1 menu

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5. MENU OPERATION

5.1.1 COM1 menu description

TX POWER: Chooses transmitter output power to maximum or minimum. The default

setting is "maximum." For further details see paragraph 2.12.1.

PULSELENGTH: Chooses pulselength to short or long (default setting). For details see

paragraph 2.12.2.

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

internal transmitter, or an external synchronous signal may be used. The higher the number the greater the number of transmissions. For operation in shallow waters, choose 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, choose EXT.

INT REJECT: Turns the interference rejector on (high freq, low freq or both low and high

freq) or off (default setting). When turned on

that the interference rejector cannot be turned on/off independently for each frequency in case of the dual-frequency display. For further details about interference rejection, see

paragraph 2.12.5 (horizontal display) and 3.12.2 (vertical scan display).

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.

AUDIO LEVEL: Adjusts the audio level (0-10) of the external loudspeaker (option).

Sometimes you may be preoccupied with other tasks and unable to concentrate on watching the sonar picture. In such cases it would be a good choice to use the audio function. This function enables you to monitor echoes from fish schools and seabed through the built-in speaker. After you’ve become accustomed to monitoring fish aurally, you should be able to detect a fish school from a range longer than you can detect it on the screen. In addition you may judge whether the fish school is approaching or going away; the tone becomes higher when the school is approaching and lowers when the school is going away.

Note: If a dual-frequency display is active, the frequency sound from the left-side display*

(for the dual-frequency vertical scan display the top display) is output.

*: Dual-frequency horizontal display, dual-frequency horizontal expansion, dual frequency echo sounder

appears at the top of the screen. Note

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5. MENU OPERATION

5.2 COM2 Menu

5.2.1 Displaying the COM2 menu

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU, and then press ◄ or ► to choose COM2.

DELETING TRACK NO

MIX MODE

WHITE MARKER OFF

SIG LEVEL OFF

COLOR 16

BKGD COLOR 2

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

STANDARD

: CHANGE MENU: END

COM2 menu

5.2.2 COM2 menu description

DELETING TRACK: Choose ON to delete all ship’s track (from horizontal and

horizontal/video plotter displays).

MIX MODE: Choose how to process the mix display. “STANDARD” displays high frequency

level when high frequency signal is larger than low frequency signal, which is useful for finding absolute echo level. “EMPHASIS” displays difference in level when high frequency signal is larger than low frequency signal, which is useful for finding difference in echo level

between low and high frequencies. Default setting is STANDARD.

WHITE MARKER: Displays desired echo in white. It is useful for discriminating bottom fish

from the bottom echo. The setting range for the 8-color display is OFF, 1-7, and for the 16-color display, OFF, 1-15.

SIG LEVEL: Refer to page 2-16.

COLOR: Chooses 8- or 16-color display.

BKGD COLOR: Chooses color of background, text and menu. Three choices are available

and these are shown in the table below.

BKGD COLOR Background Text Menu

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

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5. MENU OPERATION

5.3 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: One-touch activation of corresponding dialog box. This is the default setting. Preset key: One-touch setup of mode, sector, train, range, tilt and speed controls. Below

are the default settings for PRESET.

CUSTOM

Display Mode Frequency Sector Train Range (m)* Tilt

MODE key

Key 1 Horizontal expansion

Key 2 Horizontal

Key 3 Vertical scan

240° 0° 200 30° 360° 0° 200 30°

180° 90° 120 90°

5.3.1 Choosing short-cut or preset

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU, and then press ► to choose SYS.

GO TO SYS MENU

: SELECT

3. Press ▼ to choose GO TO SYS MENU.

4. Press ◄ to choose YES.

COM1 HORZ VERT ES PRESETCOM2

NOYES

: CHANGE

MENU: END

Display for opening system menu

SYS

** SYSTEM MENU **

SYSTEM SETTING:

RANGE-SONAR MODE RANGE-VERTICAL MODE RANGE-E/S MODE

RANGE-TRACK MODE

COLOR PALETTE LANGUAGE SYSTEM BACKUP LOAD BACKUP DATA HEADING OFFSET, DRAFT OFFSET ADJ MOTION SENSOR TX FREQ ADJUST TEST TEST PATTERN DEMO MODE DEFAULT

: SELECT

: MENU DISPLAY MENU: END

System menu

5-4

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5. Press ► to open the SYSTEM SETTING menu.

** SYSTEM SETTING 1 **

MENU 1 2

5. MENU OPERATION

POSITION :

SHIP'S L/L SHIP'S LOP CURSOR L/L

TRACK : OFF ON

CURRENT DATA :

OFF FLOW FROM FLOW TO HEADING INDICATION : TRUE AZ NORTH MARK : OFF ON CSE DATA : NAV GYRO NAV DATA : GPS LoranC LoranA DR DECCA OTHERS NAV2 BAUDRATE : 4800 9600 19200 38400

TVG CORRECTION : OFF 1/2 1/1 UNIT :

m ft fa HIRO P/B TEMP : C F TARGET L/L : OFF ON CUSTOM KEY : ETA MARK :

: SELECT

PRESET KEY

SHORT-CUT KEY

OFF 10sec 30sec 1min 3min 6min

: CHANGE MENU: END

System setting 1 menu

6. Press ▲ or ▼ to choose CUSTOM KEY.

7. Press ◄ or ► to choose PRESET KEY or SHORT-CUT KEY as desired.

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

5.3.2 Preset key

1. Choose PRESET KEY following the procedure in paragraph 5.2.1.

2. Press the MENU key to open the menu.

3. Press ▲ to choose MENU, and then press ◄ or ► to choose PRESET.

PRESENT

CUSTOM1

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

COM1 HORZ VERT ES

MODE FREQ. SECTOR TRAIN RANGE TILT

360° 200 30°0°

240° 200 30°0°

360° 200 30°0°

180° 200 90°90°

PRESET

SYSCOM2

PRESET menu

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5. MENU OPERATION

4. Set the MODE, HI/LO, SECTOR, TRAIN, RANGE and TILT 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 choose YES.

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

8. Press the MENU key to finish.

Activating the 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, TIL T and FAST SC AN.

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5. MENU OPERATION

5.3.3 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. Choose SHORT-CUT following the procedure in paragraph 5.2.1.

2. Press the MENU key to open the menu.

3. Press ▲ to choose MENU, and then press ◄ or ► to choose 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

COM1 HORZ VERT ES

VER SEARCH VOLUME DEL TRACK AUTO TILT BKGD SIG LEVEL CLUTTER RES. COLOR WHITE MARKER VER SEARCH VOLUME DEL TRACK AUTO TILT BKGD SIG LEVEL CLUTTER RES. COLOR WHITE MARKER VER SEARCH VOLUME DEL TRACK AUTO TILT BKGD SIG LEVEL CLUTTER RES. COLOR WHITE MARKER

: CHANGE

MENU: END

SHORT-CUT

SHORT-CUT menu

4. Press ▲ or ▼ to choose key to preset. For example choose KEY 1.

5. Press ◄ or ► to choose item.

6. Press the MENU key to finish.

SYSCOM2

Activating a short-cut ke y

1. Press a CUSTOM MODE key, and the dialog box programmed for the custom key pressed appears. For example, the dialog box below is for CLUTTER (HORZ).

CLUTTER (HORZ): 0 1 2 3

2. Press ◄ or ► to choose option desired.

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

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5. MENU OPERATION

When you find a target of interest on the horizontal display, simply press the function key programmed for VER. SEARCH to get a cross-sectional view of the vertical plane. This mode is useful for evaluating fish school concentration and location of the targeted fish school or for assistance in navigation.

VERTICAL SEARCH FUNCTION

Fish School

The vertical search picture is drawn using the following specifications:

- Horizontal range: Same as set on horizontal mode

- Vertical range: Same as set on horizontal mode

- Train marker: Train angle at the moment function key is turned on

- Vertical scan display range: 0-90 degrees (own ship position shifted leftward)

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5. MENU OPERATION

5.4 SYSTEM 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.

5.4.1 How to open the SYSTEM menu

1. Press the MENU key to open the menu.

2. Press ▲ to choose MENU, and then press ► to choose SYS.

3. Press ▼ to choose GO TO SYS MENU.

4. Press ◄ to choose YES.

** SYSTEM MENU **

SYSTEM SETTING:

RANGE-SONAR MODE RANGE-VERTICAL MODE RANGE-E/S MODE

RANGE-TRACK MODE

COLOR PALETTE LANGUAGE SYSTEM BACKUP LOAD BACKUP DATA HEADING OFFSET, DRAFT 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

System menu

5. Press ▲ or ▼ to choose item desired.

6. Press ◄ or ► to open corresponding dialog box.

7. Press ◄ or ► to choose option.

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

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5. MENU OPERATION

5.4.2 System setting menus

SYSTEM SETTING 1 menu

1. Display the SYSTEM menu and press ▲ or ▼ to choose SYSTEM SETTING.

2. Press ►.

3. Press ▲ to MENU.

4. Press ◄ to choose “1.”

** SYSTEM SETTING 1 **

POSITION :

TRACK : OFF ON

CURRENT DATA : HEADING INDICATION : TRUE AZ

NORTH MARK : OFF ON CSE DATA : NAV GYRO NAV DATA : GPS LoranC LoranA DR DECCA OTHERS

NAV2 BAUDRATE : 4800 9600 19200 38400

TVG CORRECTION : OFF 1/2 1/1 UNIT :

TEMP : C F TARGET L/L : OFF ON CUSTOM KEY : ETA MARK :

: SELECT

1 2

SHIP'S L/L SHIP'S LOP CURSOR L/L

OFF FLOW FROM FLOW TO

m ft fa HIRO P/B

PRESET KEY

OFF 10sec 30sec 1min 3min 6min

: CHANGE MENU: END

SHORT-CUT KEY

System setting 1 menu

SYSTEM SETTING 1 menu description

POSITION: Chooses how to displays ship’s position; latitude and longitude, Decca/Loran C

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

TRACK: Turns the track display on or off on the horizontal display. The track is always shown on the video plotter display regardless of this setting.

CURRENT DATA: Turns current data (tide), shown by vector, on or off. FLOW FROM

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

Current Vector

FLOW FROM FLOW TO

Current vector

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5. MENU OPERATION

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

NORTH MARK: Turns the north marker on or off (default sett ing). Requires heading data.

CSE DATA: Chooses 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: Chooses 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.

NAV2 BAUDRATE: Sets the baud rate of the NMEA port on transceiver unit. Default setting is 4800 bps. For connection with satellite compass, choose 38400 bps.

TVG CORRECTION: This feature raises long-range sensitivity without disturbing shortrange sensitivity, and it is particularly effective on high frequency. For dual frequency use, particularly when you feel that sensitivity on the high frequency is low compared to that on the low frequency, adjust TVG correction for the high frequency. The settings available are OFF, 1/ 2 and 1/1, in ascending order of strength. If the setting is too strong, noise will result. Watch the display while changing this setting. If noise exists on short range or if the echo st rength of like size fish from long and short ranges is different use the TVG feature. For further details, see 2.12.3, 3.12.1 and 4.10.1.

UNIT: Chooses unit of depth measurement: meters (def ault setting), feet, fathoms, passi/braza, Hiro.

TEMP: Chooses unit of water temperature m easurement: °C (default setting), °F.

TARGET L/L: Turn on to output event marker position to external equipment. Requires

heading and latitude and longitude data from external equipm ent. Default setting is OFF.

CUSTOM KEY: Chooses function of custom mode keys: preset (default setting) or short-cut. For details see paragraph 5.2.

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 t he 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 mark

ETA marker

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5. MENU OPERATION

SYSTEM SETTING 2 menu description

** SYSTEM SETTING 2 **

MENU :

AUTO RETRACTION : SPEED ALARM/MESSAGE: SWEEP INDICATOR :

DEFAULT SETTING :

MAXIMUM ALLOWABLE SPEED IS 15 KNOTS WHILE SOUNDOME 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.

: SELECT

1 2

OFF ONGAIN SETTING PROTECT: OFF ONHORZ/HISTORY :

OFF ONHORZ/VERT :

OFF ONHORZ/VERT ZOOM : OFF ONHORZ/PLOTTER : OFF NORMAL REDEMPHASIS MODE :

OFF MOTION SENSOR SAT. COMPASSSTABILIZER : OFF (OFF, 5-15 kt) OFF ON

DOT LINE NO YES

: CHANGE MENU: END

System setting 2 menu

GAIN SETTING PROTECT: Prevents accidental adjustment of the gain. When ON the gain

cannot be adjusted unless the GAIN control is first pushed. Default setting is ON. This feature is effective on the single-frequency displays and combination displays (mix display OFF).

HORZ/HISTORY: Enables/disables the horizontal/history display. Default setting is ON.

HORZ/VERT: Enables/disables the horizontal/vertical scan display. Default setting is ON.

HORZ/VERT ZOOM: Enables/disables the horizontal/vertical zoom display. Default setting

is ON.

HORZ/PLOTTER: Enables/disables the horizontal/plotter display. Default setting is ON.

EMPHASIS MODE: Choose method of picture interpolation. OFF: Interpolation close to raw signal. NORMAL: Clarifies picture. EMPHASIS: Emphasizes strong signals.

STABILIZER: Choose the sensor to use to compensate for effects of ship’s pitching and

rolling. The choices are Motion Sensor MS-100, Clinometer BS-704 and Satellite Compass (SC-50/SC-110).

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5. MENU OPERATION

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). The transducer may be retracted

at a speed other than the intended one when ship’s speed data is erroneous.

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

Transducer being lowered

Speed over 15 kts Message 1 appears and lowering continues.

Transducer lowered

Speed above 20 kts

[↑] pressed to raise transducer

Speed above 15 kts

Tran sducer being raised

Speed above 15 kts

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

Message 2 appears accompanied with the aural alarm. Reduce the speed below 20 kts to restore normal operation.

Message 1 appears accompanied with the aural alarm. Transducer is not raised. Reduce the speed below 15 kts to erase the message and restore normal operation. Then, press [ again to raise the transducer.

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

↑]

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

PRESS R/B KEY TO SILENCE ALARM.

Message 1

Message 2

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

↑

TO RETRACT IT.)

PRESS R/B KEY TO SILENCE ALARM.

SWEEP INDICATOR: Shows train position in the horizontal mode and tilt angle in the vertical scan mode, with a line or a dot. (See the illustration on page 2-2 and 3-2.)

DEFAULT SETTING: Choose 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 **

ARE YOU SURE? :

NOTE! ALL THE SYSTEM SETTING WILL BE CHANGED

TO FACTORY SETTING.

NO YES

: CHANGE MENU: END

FACTORY SETTING dialog box

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5. MENU OPERATION

5.4.3 Sonar (horizontal) mode range settings

The user may preset horizontal mode ranges as desired.

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

** RANGE-SONAR MODE **

1:20 (10-1600m)

2:40 3:60 4:80

5 : 100 6 : 120 7 : 160 8 : 200 9 : 250

10 : 300 11 : 400 12 : 500 13 : 600 14 : 800 15 : 1200

DEFAULT SETTING : NO YES

: SELECT

: CHANGE MENU: END

Range-sonar mode dialog box

2. Press ▲ or ▼ to choose range number desired.

3. Press ◄ or ► to set range.

4. To restore default horizontal mode range settings, choose DEFAULT SETTING, press ►

to choose YES and press the MENU key.

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

5-14

Furuno CH-300 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

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 Choosing a Display

1.7 Choosing a Frequency

1.8 Mix Display

1.9 Adjusting the Gain

1.10 Menu Overview

2. HORIZONTAL MODE

2.1 Operational Overview

2.2 Typical Horizontal Mode Display

2.3 Choosing a Range

2.4 Choosing Sector Width

2.5 Choosing Train Center

2.6 Choosing a Tilt Angle

2.7 Choosing Training Speed

2.8 Changing Training Direction

2.9 Finding Echo Position with the Cursor

2.10 Event Marker

2.11 Depth and Horizontal Range Markers

2.12 Adjusting the Picture

2.13 Target Lock

2.14 Horizontal Menu Overview

2.15 Interpreting the Horizontal Display

3. VERTICAL SCAN MODE

3.1 Operational Overview

3.2 Typical Vertical Scan Mode Display

3.3 Choosing a Range

3.4 Choosing Train Center

3.6 Choosing Sector Center

3.7 Choosing Training Speed

3.8 Finding Echo Position with the Cursor

3.9 Changing Training Direction

3.10 Event Marker

3.11 Depth and Horizontal Range Markers

3.12 Adjusting the Picture

3.13 Vertical Menu Overview

3.14 Interpreting the Vertical Scan Display

4. ECHO SOUNDER MODE

4.1 Operational Overview

4.2 Typical Echo Sounder Display

4.3 Choosing a Range

4.4 Train Direction

4.5 Choosing a Tilt Angle

4.6 Choosing a Picture Advance Speed

4.7 Measuring Range by Cursor

4.8 Event Marker

4.9 Range Marker

4.10 Adjusting the Picture

4.11 Echo Sounder Menu Overview

5. MENU OPERATION

5.2 COM2 Menu

5.3 Short-cut Menu, Preset Menu

5.4 SYSTEM Menu