Furuno FSV85 Operator's Manual

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Page 1

OPERATOR'S MANUAL

COLOR SCANNING SONAR

Model

FSV-85

www.furuno.com

Page 2

The paper used in this manual

9-52 Ashihara-cho,

A:MAR

2011

B1:FEB.07, 2013

Pub. No.

(

)

*00017433911*

Nishinomiya, 662-8580, JAPAN

is elemental chlorine free.

・FURUNO Authorized Distributor/Dealer

ETMI

FSV-85

Printed in Japan

OME-13350-B1

*00017433911*

* 0 0 0 1 7 4 3 3 9 1 1 *

Page 3

IMPORTANT NOTICES

General

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

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

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

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

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

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

• Save this manual for future reference.

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

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

How to discard this product

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

How to discard a used battery

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

In the European Union

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

In the USA

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

In the other countries

PbNi-Cd

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

Page 4

SAFETY INSTRUCTIONS

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

Indicates a hazardous situation which, if not avoided, will result in

DANGER

WARNING

CAUTION

death or serious injury.

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

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

Warning, Caution

Prohibitive Action

DANGER

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

Gears in hull unit will cause serious injury.

WARNING

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 into the equipment.

Mandatory Action

WARNING

Do not disassemble or modify the equipment.

Fire, electrical shock or serious injury can result.

Do not install the equipment where it may be subject to rain or water splash.

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

Use the proper fuse.

Use of a wrong fuse can result in damage to the equipment or cause fire.

Do not operate the equipment with wet hands.

Electrical shock may result.

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

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.

Do not place liquid-filled containers on the top of the equipment.

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

Turn off the power immediately if you feel the equipment is behaving abnormally.

Turn off the power at the switchboard if the equipment becomes abnormally warm or is emitting odd noises. Contact a FURUNO dealer or agent for advice.

Page 5

SAFETY INSTRUCTIONS

CAUTION

Maximum speed while the transducer is projected and being raised or lowered is as below, to prevent damage to the transducer.

Projected

Max. 18 kn

Replace anticorrosion zinc plate yearly.

Corrosion between the main shaft and transducer may result if not replaced, allowing water leakage and/or loss of transducer.

Raising/ Lowering

Max. 15 kn

CAUTION

Observe the following precautions when using industrial use lubricant.

Precautions



Keep lubricant away from eyes. Wear protective goggles when working with the lubricant. The lubricant can cause inflammation of the eyes.



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



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



Keep the lubricant out of reach of children.

Emergency procedures



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



If the lubricant contacts skin, flush area with clean water.



If the lubricant is ingested, see a physician immediately.

Disposal of lubricant and its container

Dispose of the lubricant and its container in accordance with local regulations. If you are unclear about the disposal procedure, contact a FURUNO agent or dealer for advice.

WARNING LABELS Warning labels are attached to the units of the system. Do not remove the labels. If a label is missing or damaged, contact a FURUNO agent or dealer about replacement

WARNING

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

⼊㩷㩷๔

േ䉲䊞䊐䊃ㇱಽ䈲ᚻ䉕䈲䈘䉃 ᕟ䉏䈅䉍䇯 Ⓙേ䈲ᚻ䉕ㄭ䈨䈔䈭䈇䈖䈫䇯䉰䊷䊎䉴䉕ⴕ䈉೨䈲㔚Ḯ䉕ಾ䉎䈖䈫䇯

Name: Finger Warning Label Type: 06-021-4015 Code No.: 100-281-590-10

DANGER

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

ෂ㩷㩷㒾

ᗵ㔚䈱ᕟ䉏䈅䉍䇯䉰䊷䊎䉴䊙䊮એᄖ䈱ᣇ䈲䇮䉦䊋䊷䉕㐿䈔䈭䈇䈪䈒䈣䈘䈇䇯㩷ౝㇱ䈮䈲㜞࿶ㇱຠ䈏ᢙᄙ䈒䈅䉍䇮 ৻䈘䉒䉎䈫ෂ㒾䈪䈜䇯䉰䊷䊎䉴䊙䊮䈏䉦䊋䊷䉕㐿䈔䉎႐ว䈲䇮㔚Ḯ䉕㪦㪝㪝䈚䈢ᓟ䇮䌃䌈䌁䌒䌇䌅䊤䊮䊒䋨✛䋩䈏ᶖἮ 䈚䈩䈇䉎䈖䈫䉕⏕⹺䈚䈩䈎䉌㐿䈔䈩䈒䈣䈘䈇䇯

WARNING

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

⼊䇭๔

ᗵ㔚䈱ᕟ䉏䈅䉍䇯

䉰䊷䊎䉴䊙䊮એᄖ䈱ᣇ䈲䉦䊋䊷䉕㐿䈔䈭䈇䈪䈘䈇䇯ౝㇱ䈮䈲㜞㔚࿶ㇱಽ䈏 ᢙᄙ䈒䈅䉍䇮৻䈘䉒䉎䈫ෂ㒾䈪䈜䇯

Name: Warning Label (1) Type: 86-003-1011-3 Code No.: 100-236-233-10

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

iii

Page 6

TABLE OF CONTENTS

FOREWORD ................................................................................................................... ix

SYSTEM CONFIGURATION ...........................................................................................x

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

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

1.1.1 Control unit..................................................................................................... 1-1

1.1.2 Sub control unit (option)................................................................................. 1-2

1.1.3 Remote controller (option).............................................................................. 1-3

1.2 Turning the Power On/Off ..........................................................................................1-4

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

1.3.1 Lowering the transducer................................................................................. 1-5

1.3.2 Raising the transducer ................................................................................... 1-5

1.4 Screen Brilliance, Panel Dimmer ............................................................................... 1-5

1.4.1 Screen brilliance............................................................................................. 1-5

1.4.2 Panel dimmer.................................................................................................1-5

1.5 Display Mode, Display Division .................................................................................. 1-6

1.5.1 How to select a display mode ........................................................................1-8

1.5.2 Display mode pictures....................................................................................1-8

1.6 How to Adjust the Gain ............................................................................................ 1-11

1.7 How to Use the Menu...............................................................................................1-12

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

2.1 Basic Operating Procedure ........................................................................................ 2-1

2.2 Indications and Markers ............................................................................................. 2-2

2.2.1 Horizontal mode, full-screen display .............................................................. 2-2

2.2.2 Horizontal2 mode........................................................................................... 2-3

2.3 Display Range............................................................................................................2-4

2.4 Tilt Angle .................................................................................................................... 2-5

2.4.1 How to set the tilt angle..................................................................................2-5

2.4.2 Automatic tilt................................................................................................... 2-5

2.4.3 Relation between bottom echo and tilt angle................................................. 2-7

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

2.4.5 Suitable tilt angle............................................................................................2-8

2.5 How to Measure Range and Bearing to a Target.......................................................2-9

2.6 How to Eliminate Weak Echoes ................................................................................. 2-9

2.7 How to Adjust Strong, Weak Echoes .......................................................................2-12

2.7.1 AGC .............................................................................................................2-12

2.7.2 Near AGC..................................................................................................... 2-12

2.7.3 2nd AGC ......................................................................................................2-13

2.7.4 How to shorten pulse length......................................................................... 2-14

2.8 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters ............. 2-15

2.9 How to Reject Sonar Interference and Noise........................................................... 2-16

2.9.1 How to identify the noise source .................................................................. 2-16

2.9.2 Change TX interval ......................................................................................2-16

2.9.3 Interference rejector.....................................................................................2-17

2.9.4 Shift TX frequency........................................................................................ 2-17

2.9.5 Noise limiter .................................................................................................2-18

2.9.6 Reverberation............................................................................................... 2-19

2.9.7 Echo average...............................................................................................2-19

2.9.8 Reference bearing in frequency shift ...........................................................2-19

2.9.9 How to suppress sidelobes .......................................................................... 2-19

2.10 How to Adjust Beam Width ......................................................................................2-20

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TABLE OF CONTENTS

2.11 How to Track a School of Fish..................................................................................2-21

2.11.1 How to select the target lock mode ..............................................................2-21

2.11.2 Fish mode.....................................................................................................2-22

2.11.3 Target mark mode ........................................................................................2-23

2.11.4 Target lock menu description .......................................................................2-23

2.12 Presentation Mode ...................................................................................................2-24

2.12.1 Presentation mode description.....................................................................2-24

2.12.2 How to select a presentation mode ..............................................................2-25

2.13 How to Detect Schools of Fish Aurally .....................................................................2-26

2.13.1 How to set the bearing .................................................................................2-26

2.13.2 How to select the audio sector .....................................................................2-26

2.13.3 Automatic training.........................................................................................2-27

2.13.4 Reverberation for audio signal .....................................................................2-27

2.14 Fish Alarm ................................................................................................................2-27

2.15 How to Relocate a School of Fish ............................................................................2-28

2.16 How to Compare Concentration of School of Fish ...................................................2-29

2.16.1 How to compare with the fish estimate mark................................................2-29

2.16.2 How to compare with the circle cursor .........................................................2-30

2.17 How to Measure the Speed of a School of Fish .......................................................2-32

2.17.1 How to measure the speed of a school of fish .............................................2-32

2.17.2 How to delete fish marks ..............................................................................2-33

2.18 Event Mark, Own Ship Position Mark .......................................................................2-34

2.18.1 How to enter an event mark .........................................................................2-34

2.18.2 How to enter an own ship position mark ......................................................2-35

2.18.3 How to erase an event mark, own ship position mark..................................2-35

2.19 Net Course Mark ......................................................................................................2-36

2.20 Net Behavior.............................................................................................................2-37

2.21 Menu Items Descriptions ..........................................................................................2-38

2.22 How to Interpret the Horizontal Display ....................................................................2-41

2.22.1 Bottom and school of fish echoes ................................................................2-41

2.22.2 Unnecessary echoes....................................................................................2-43

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

3.1 Basic Operating Procedure ........................................................................................3-1

3.2 How the Vertical Mode Works ....................................................................................3-2

3.2.1 Overview ........................................................................................................3-2

3.2.2 How to set the vertical display........................................................................3-2

3.3 Vertical Indications and Marks....................................................................................3-3

3.3.1 Typical vertical display ...................................................................................3-3

3.3.2 Vertical bearing mark, tilt mark.......................................................................3-4

3.3.3 Cursor position reference mark ......................................................................3-5

3.4 Auto Train...................................................................................................................3-5

3.5 Display Range ............................................................................................................3-5

3.6 How to Measure the Range, Bearing to a Target.......................................................3-6

3.7 How to Eliminate Weak Echoes .................................................................................3-6

3.8 How to Adjust Strong, Weak Echoes..........................................................................3-9

3.8.1 AGC................................................................................................................3-9

3.8.2 Near AGC.......................................................................................................3-9

3.8.3 2nd AGC.......................................................................................................3-10

3.8.4 How to shorten pulse length.........................................................................3-10

3.9 How to Reject Sonar Interference and Noise ...........................................................3-11

3.9.1 How to identify the noise source ..................................................................3-11

3.9.2 Interference rejector .....................................................................................3-12

3.9.3 Shift TX frequency........................................................................................3-12

3.9.4 Noise limiter..................................................................................................3-13

3.9.5 Reverberation...............................................................................................3-14

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TABLE OF CONTENTS

3.9.6 Echo average...............................................................................................3-14

3.9.7 How to suppress sidelobes .......................................................................... 3-14

3.10 How to Adjust Beam Width ......................................................................................3-15

3.11 Other Menu Items ....................................................................................................3-16

3.12 Application to Bonito and Tuna Fishing.................................................................... 3-17

3.12.1 Searching..................................................................................................... 3-17

3.12.2 Tracking ....................................................................................................... 3-17

3.12.3 Approaching................................................................................................. 3-18

3.12.4 Catching....................................................................................................... 3-18

4. SLANT MODE ........................................................................................................4-1

4.1 Basic Operating Procedure ........................................................................................ 4-1

4.2 Indications and Marks ................................................................................................4-2

4.2.1 Slant mode, full-screen display ...................................................................... 4-2

4.2.2 Slant mode, combination display ...................................................................4-3

4.3 Display Range............................................................................................................4-4

4.4 Tilt Angle .................................................................................................................... 4-4

4.4.1 How to set the tilt angle..................................................................................4-4

4.4.2 Automatic tilt................................................................................................... 4-5

4.5 Auto Train...................................................................................................................4-6

4.6 How to Measure Range and Bearing to a Target.......................................................4-6

4.7 How to Eliminate Weak Echoes ................................................................................. 4-7

4.8 How to Adjust Strong, Weak Echoes .........................................................................4-8

4.8.1 AGC ...............................................................................................................4-8

4.8.2 Near AGC....................................................................................................... 4-9

4.8.3 2nd AGC ........................................................................................................4-9

4.8.4 How to shorten pulse length......................................................................... 4-10

4.9 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters ............. 4-11

4.10 How to Reject Sonar Interference and Noise........................................................... 4-12

4.10.1 How to identify the noise source ..................................................................4-12

4.10.2 Change TX interval ...................................................................................... 4-13

4.10.3 Interference rejector..................................................................................... 4-13

4.10.4 Shift TX frequency........................................................................................ 4-14

4.10.5 Noise limiter ................................................................................................. 4-14

4.10.6 Reverberation...............................................................................................4-15

4.10.7 Echo average............................................................................................... 4-15

4.10.8 How to suppress sidelobes ..........................................................................4-16

4.11 How to Adjust Beam Width ......................................................................................4-16

4.12 How to Track a School of Fish ................................................................................. 4-17

4.12.1 How to select the target lock mode.............................................................. 4-17

4.12.2 Fish mode .................................................................................................... 4-18

4.12.3 Target mark mode........................................................................................ 4-18

4.12.4 Target lock menu description....................................................................... 4-19

4.13 How to Detect Schools of Fish Aurally .....................................................................4-20

4.13.1 How to set the bearing .................................................................................4-20

4.13.2 How to select the audio sector..................................................................... 4-20

4.13.3 Reverberation for audio signal ..................................................................... 4-21

4.14 Fish Alarm................................................................................................................4-21

4.15 How to Relocate a School of Fish ............................................................................4-22

4.15.1 Manual offcenter .......................................................................................... 4-22

4.15.2 Automatic offcenter ......................................................................................4-23

4.16 How to Compare Concentration of School of Fish ...................................................4-24

4.16.1 How to compare with the fish estimate mark ............................................... 4-24

4.16.2 How to compare with the circle cursor .........................................................4-24

4.17 How to Measure the Speed of a School of Fish....................................................... 4-26

4.17.1 How to measure the speed of a school of fish ............................................. 4-26

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TABLE OF CONTENTS

4.17.2 How to delete fish marks ..............................................................................4-27

4.18 Event Mark ...............................................................................................................4-28

4.18.1 How to enter an event mark .........................................................................4-28

4.18.2 How to erase an event mark ........................................................................4-29

4.19 Net Course Mark ......................................................................................................4-30

4.20 Net Data ...................................................................................................................4-31

4.21 Menu Items Descriptions ..........................................................................................4-31

4.22 How to Interpret the Slant Display ............................................................................4-33

4.22.1 Bottom echoes .............................................................................................4-33

4.22.2 School of fish................................................................................................4-34

4.22.3 False echoes ................................................................................................4-35

5. NUMERIC/GRAPHIC DATA DISPLAY .................................................................5-1

5.1 Numeric/Graphic Data Display ...................................................................................5-1

5.2 Numeric, Graphic Data Description............................................................................5-2

6. HOW TO CUSTOMIZE THE EQUIPMENT............................................................6-1

6.1 User Menu ..................................................................................................................6-1

6.1.1 How to program the user menu......................................................................6-1

6.1.2 How to delete items from the user menu........................................................6-2

6.2 Function Keys (F1-F10)..............................................................................................6-2

6.2.1 How to execute a program .............................................................................6-3

6.2.2 How to program the function keys..................................................................6-3

6.2.3 How to erase programs..................................................................................6-4

6.2.4 How to program the function keys of remote controller ..................................6-4

6.3 USER PROG Control .................................................................................................6-5

6.3.1 How to select a user program ........................................................................6-5

6.3.2 How to program the USER PROG control .....................................................6-5

6.3.3 How to program display ranges......................................................................6-6

7. OTHERS MENU.....................................................................................................7-1

7.1 Erase Marks Menu .....................................................................................................7-1

7.2 Wheel Setting Menu ...................................................................................................7-2

7.3 Display Setting Menu..................................................................................................7-3

7.4 Alarm & Audio Menu...................................................................................................7-5

7.5 Register Menu ............................................................................................................7-6

7.6 Initial Setting Menu.....................................................................................................7-7

8. RECORD/RECALL OPERATION..........................................................................8-1

8.1 How to Specify Where to Save Still Images ...............................................................8-1

8.2 How to Save Still Image .............................................................................................8-2

8.3 How to Display Saved Still Images.............................................................................8-2

8.4 How to Save Settings .................................................................................................8-4

8.5 How to Load Files.......................................................................................................8-5

8.5.1 How to load the setting information................................................................8-5

8.5.2 How to replay setting information...................................................................8-6

8.6 How to Delete Files ....................................................................................................8-7

9. MAINTENANCE, TROUBLESHOOTING .............................................................. 9-1

9.1 Preventive Maintenance.............................................................................................9-1

9.2 Hull Unit Maintenance ................................................................................................9-2

9.3 How to Replace Fuses ...............................................................................................9-3

9.4 Battery on the Mother Board ......................................................................................9-3

9.5 How to Clean the Filter in the Processor Unit.............................................................9-4

9.6 How to Clean the Trackball on the Control Units........................................................9-4

9.7 Troubleshooting..........................................................................................................9-5

vii

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TABLE OF CONTENTS

9.8 Warning Messages .................................................................................................... 9-6

9.9 Error Codes................................................................................................................9-7

9.10 Status Messages........................................................................................................9-8

9.11 Tests .......................................................................................................................... 9-8

9.11.1 Test menu ...................................................................................................... 9-8

9.11.2 Board test....................................................................................................... 9-9

9.11.3 Panel test .....................................................................................................9-10

9.11.4 Test pattern.................................................................................................. 9-11

9.12 How to Raise the Transducer from the Hull Unit...................................................... 9-11

9.12.1 How to raise the transducer automatically ................................................... 9-12

9.12.2 How to raise the transducer manually.......................................................... 9-13

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

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

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

viii

Page 11

FOREWORD

A Word the Owner of the FSV-85

Congratulations on your choice of the FURUNO FSV-85 Color Scanning Sonar. We are confident you will see why the FURUNO name has become synonymous with quality and reliability.

Since 1948, FURUNO Electric Company has enjoyed an enviable reputation for quality marine electronics equipment. This dedication to excellence is furthered by our extensive global network of agents and dealers.

This equipment is designed and constructed to meet the rigorous demands of the marine environment. However, no machine can perform its intended function unless operated and maintained properly. Please carefully read and follow the recommended procedures for operation and maintenance.

Thank you for considering and purchasing FURUNO equipment.

Features

The FSV-85 is a full-circle, multibeam electronic color scanning sonar which detects and displays schools of fish on the monitor of your choice.

The main features of the FSV-85 are

• Cylindrical + sphere transducer provides 90 degrees vertical detection.

• Schools of fish can be searched from horizontal (range direction), vertical (depth direction) with vertical and half-circle features.

• Function keys for direct access to desired menu item.

• Dual Display mode

• User programs for one-touch setup of equipment.

• Menu-driven operation.

• Fish histogram shows signal strength distribution of echo within estimate mark.

• Various marks and alphanumeric fishing and navigation information for intuitive operation.

• Storage and replay of picture and settings.

• Audio function for monitoring echoes along user-selected area through loudspeaker (option).

• Fish mark estimates fish speed.

• Fish estimate feature to compare the volume of two schools of fish.

• Net course mark shows probable drift of net against tidal current.

• Pitching and rolling compensation for stable picture always.

Page 12

SYSTEM CONFIGURATION

MAIN SW

FUSE

Standard configuration is shown with solid line.

Monitor Monitor

USB device (mouse, etc.)

12-24 VDC

Rectifier RU-1746B-2

100/110/115/ 220/230 VAC

Satellite Compass SC-30/50/100

Processor Unit

FSV-8503

IF Unit

FSV-8502

Transceiver Unit

FSV-851A

Junction Box FI-5002

NMEA IEC 61162-1 device

Speaker

Sub Control Unit FSV-853

Control Unit FSV-8501

Remote Controller FSV-854

200-220 VAC 3

Hull Unit (80 kHz) FSV-8431 - 8434 FSV-8441 - 8444 (70 kHz) FSV-8531 - 8534 FSV-8541 - 8544

, 50/60 Hz

100/110/115/ 220/230 VAC

, 50/60 Hz

FUSE

Page 13

1. OPERATIONAL OVERVIEW

1.1 Control Description

1.1.1 Control unit

MENU/

ESC

䌆1

AUTO

TILT

䌆2

USER PROG

MODE

䌆3

DISP

䌆4

SHOOT

GAIN

䌆5

V1/S

AUTO

TRAIN

R/B

AUDIO

H/V/S

䌆6

OFF

CENTER

DELETE

MARK

RANGE

䌆7

䌆8

EVENT

ESTIMATE

TAR GET LOCK

䌆9

EVENT

ESTI-

MATE

FISH

䌆10

Function key

Key Function

| Turns power on.

Tilt lever

Trackball

Scrollwheel

Left-click button

Right-click button

Trackball unit

Turns power off.

Raises the transducer.

Lowers the transducer (mid protrusion).

Lowers the transducer (full protrusion).

• Enters the net shooting mark or own ship mark (horizontal mode).

SHOOT

• Displays the net shoot data and net depth data (horizontal mode, slantmode).

V1/S

AUTO TRAIN

• Sets vertical cross section bearing.

• Sets train by 5° clockwise.

• Sets vertical cross section bearing.

• Sets train by 5° counterclockwise.

Automatic transducer train width on audio bearing mark (horizontal mode), vertical bearing mark (vertical mode).

OFF CENTER Off centers own ship’s position (horizontal mode, slant-mode).

R/B AUDIO

• Displays range and bearing marks (horizontal mode, slant mode).

• Sets the audio bearing.

DELETE MARK Deletes trackball-selected mark.

EVENT

• Inscribes event mark 1 or own ship mark (horizontal mode).

• Inscribes event mark 1 (slant mode).

1-1

Page 14

1. OPERATIONAL OVERVIEW

Key Function

EVENT

ESTIMATE 1 ESTIMATE 2

TARGET

LOCK

FISH

MENU/ESC Short-press: Opens or closes the menu; returns to the previous menu.

AUTO TILT Sets auto tilt angle.

DISP MODE Selects display mode.

H/V/S • Selects the mode tab on the menu.

Function key

(F1 to F10)

USER PROG

control

GAIN control Adjusts gain for horizontal, half-circle and vertical scans.

RANGE control Selects the display range for horizontal, half-circle and vertical scans.

Tilt lever Sets transducer tilt angle for horizontal and half-circle scan.

Trackball unit Trackball:

• Inscribes event mark 2 or own ship mark (horizontal mode).

• Inscribes event mark 2 (slant mode).

Turns the estimate mark on/off (horizontal mode, slant mode).

Enters target lock mark (horizontal mode, slant mode).

Enters fish mark (horizontal mode, slant mode).

Long-press: Closes all menus.

• Selects mode (horizontal/vertical, horizontal/half-circle, horizontal/horizontal 2) to adjust sensitivity, select range, set tilt, and user program number.

Execute assigned program.

Selects user-programmed settings.

• Positions cursor.

• Selects items, options on menu.

Left-click button:

• Confirms the selected item.

• Selects the item to drag and drop.

Scrollwheel:

• Rotate: Sets numeric data.

• Rotate: Selects menu item.

• Rotate: Sets tilt angle, range, bearing/train angle, gain, and user program number.

• Push: Confirms the selected item.

• Push: Shows the [Select Mark] window.

Right-click button:

• Shows pop-up menu.

• Confirms the selected item.

1.1.2 Sub control unit (option)

The sub control unit lets you control the sonar from a remote location.

No. Function (on control unit)

Same as F1, F2, F3 and F4 key.

(The program can be changed. See section 6.2.4.)

Same as trackball unit on control unit.

1-2

Page 15

1.1.3 Remote controller (option)

The remote controller lets you control the sonar from a remote location.

Note: Keep the remote controller away from water and water splash. Hook the remote controller to the bracket when it is not in use.

No. Function (on control unit)

1 Same as F1, F2 and F3 key.

1. OPERATIONAL OVERVIEW

Same as key.

,䇭䇭,

䇭

3 Same as right-click button.

4 Same as the left-click button.

Same as [EVENT], [ESTI-

MATE], [TARGET LOCK] and [FISH] keys.

6 Same as trackball.

7 Same as OFF CENTER key.

8 Same as USER PROG control.

9 Same as GAIN control.

10 Same as RANGE control.

11 Same as SHOOT key.

12 Records the current picture.

13 Shows the still image window.

14 Same as MODE key.

䌆䋱䌆䋲䌆䋳

1 2

OFFCENT

345

SHOOT

MEMO

DISP

RECALL

MODE

11 12

13 14

AUTO

H/V/S

17 18

15 Same as AUTO TRAIN key.

16 Same as V1/S, V2 key.

17 Same as AUTO TILT key.

18 Same as TILT lever.

19 Same as H/V/S key.

1-3

Page 16

1. OPERATIONAL OVERVIEW

㪦

Change of the lamps

CAUTION

1.2 Turning the Power On/Off

Turning the power on

Press the POWER ON ( | ) switch. A beep sounds, and the display changes in the following sequence: FURUNO display → model display → board test display. Then lamp above the switch changes as below. The last-used mode is activated in approximately 140 seconds after turning the power on.

Lamp

When pressing the POWER ON switch

㪪㪟

Change of the lamps

Lamp

: ON

: OFF

POWER OFF switch

POWER ON switch

Retraction key

Full protrusion key

Mid protrusion key

After the board test is completed

Turning the power off

1. First retract the transducer with the key. The lamp above the key blinks while the transducer is being raised and lights steadily when it is fully raised.

Note: While raising the transducer, the ship speed must be no more than 15 knots to prevent damage to the transducer and hull unit.

2. After the key lights steadily, press the POWER OFF ( ) switch for more than three seconds. Note: The transducer is automatically retracted into the tank if the POWER OFF switch is pressed before retracting the transducer. However, for safety purposes, retract the transducer before turning off the power.

1.3 Lowering, Raising the Transducer

1-4

CAUTION

Maximum speed while the transducer is projected and being raised or lowered is as below, to prevent damage to the transducer.

Projected

Max. 18 kn

Raising/ Lowering

Max. 15 kn

Page 17

1.3.1 Lowering the transducer

With the boat at the fishing ground and the power on, press the or key. The lamp above the key pressed blinks during lowering and lights when the transducer is completely lowered to selected protrusion distance. It takes about 21 seconds for full protrusion in case of 800 mm stroke and 28 seconds in case of 1100 mm stroke. In normal use fully lower the transducer. If the transducer becomes entangled in the net for some reason, partially raise the transducer with the key. This raises the transducer by 300 mm.

1.3.2 Raising the transducer

Press the key to raise the transducer. The lamp above the switch blinks while the transducer is being raised and lights steadily when it is fully raised.

1.4 Screen Brilliance, Panel Dimmer

1.4.1 Screen brilliance

1. OPERATIONAL OVERVIEW

The brilliance of an external monitor cannot be adjusted from the Control Unit. Use the associated control on the monitor.

1.4.2 Panel dimmer

1. Press the MENU/ESC key to open the main menu.

2. Select [Others] then push the left-click button.

1-5

Page 18

1. OPERATIONAL OVERVIEW

3. Select [Display Setting] then push the left-click button.

4. Select [Dimmer] then push the left-click button to show the setting box.

5. Select S (increase) or T (decrease).

6. Push the left-click button several times to select a value.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Note: The default function of the F8 key adjusts the panel dimmer.

1.5 Display Mode, Display Division

There are six display modes; Horizontal, Horizontal1 + Horizontal2*, Slant (single display), Horizontal + Slant*, Vertical1* and Vertical 1 + Vertical 2*.

1-6

*: If the FSV-85 is fitted with dual monitors, you can select how the picture data is

shown on two displays; Dual Display or Sub Display. For details, see page 7-8.

Page 19

1. OPERATIONAL OVERVIEW

Echo picture

display (Within

Range)

Echo picture

display (Full

Screen)

Numeric/graphic

data display

Numeric/graphic

data display

W E

Main monitor

300

Sub monitor

Ex; Dual Display (H1 + H2 mode)

Display format

As shown in the illustration below, you have two choices with which to show the echo display. See page 7-3 for how to select the display method. For the numeric/graphic data display, see page 5-1.

Echo picture

display (Within

Range)

Echo picture

display (Full

data display

Numeric/graphic

Screen)

data display

Numeric/graphic

1-7

Page 20

1. OPERATIONAL OVERVIEW

1.5.1 How to select a display mode

Press the MODE key several times until the desired display appears. The default modes are Horizontal, Horizontal1 + Horizontal2, Vertical1 and Vertical1 + Vertical2. You can program the MODE key to show any or all of the modes mentioned above. For further details, see "Display Mode" on page 7-6.

The MODE key may be programmed to show a pull-down menu instead of a conventional menu.

1. Push the right-click button on the numeric/graphic data display.

2. Select [Display Mode] then push the left-click button.

3. Select the mode to display then push the left-click button.

1.5.2 Display mode pictures

Below are typical pictures. For sake of brevity, indications and marks are not shown.

Horizontal mode

This mode provides 360-degree coverage around the vessel and it is useful for general search. For further details, see chapter 2.

NUMERIC/ GRAPHIC

DATA

DISPLAY

1-8

Horizontal mode

Page 21

1. OPERATIONAL OVERVIEW

H2 mode

This mode provides two horizontal screens (H1 and H2) in one of the configurations shown below. The default configuration, Landscape, shows two horizontal displays, one up and one down. Other configurations available are as shown below. Desired configuration may be chosen with H2/S2 Display in the [Display Setting] menu. For further details, see chapter 2.

NUMERIC/

GRAPHIC

DATA

DISPLAY

LANDSCAPE PORTRAIT

㪟㪈㪟㪉

1 2 3

1 2

NUMERIC/

GRAPHIC

DATA

DISPLAY

NUMERIC/

GRAPHIC

DATA

DISPLAY

Zoom-out window

300

2000

2 3

1 2 3

INSET

H2 mode

Slant mode, single display

The Slant mode shows a 180-degree cross section, using chosen tilt angle and train setting. For further details, see chapter 4.

Bottom

School of fish

Sea surface reflection

Slant mode (single display)

1-9

Page 22

1. OPERATIONAL OVERVIEW

H and S mode

This mode provides horizontal and slant modes in one of the configurations shown below. The default configuration, Landscape, shows two horizontal displays, one up and one down. Other configurations available are as shown below. Desired configuration may be chosen with H2/S Display in the [Display Setting] menu. For further details, see chapter 4.

Landscape display (Slant mode on bottom half)

Numeric/graphic data display

2000

2 3

1 2 3

Slant mode in inset

300

1 2 3

1 2

Portrait display (Slant mode at right half)

Numeric/graphic data display

Zoom-out window

Numeric/graphic data display

H and S mode

1-10

Page 23

1. OPERATIONAL OVERVIEW

㪈㪇㪇㪇

㪌㪇㪇

㪈㪇㪇㪇

㪌㪇㪇

V1 and V2 modes

The V1 and V2 modes show a vertical slice of the bearing selected by the vertical bearing mark on the horizontal display. The vertical 2 mode provides two vertical slices. For further details, see chapter 3.

㪥

㪟㪟

㪮

㪈㪇㪇㪇㪈㪌㪇㪇

㪌㪇㪇

㪭㪈

㪌㪇㪇

㪉㪇㪇㪇

㪈㪇㪇㪇

㪪

㪭

NUMERIC/

GRAPHIC

㪜

DATA

DISPLAY

V1 mode

Vertical mode

1.6 How to Adjust the Gain

The GAIN control adjusts receiver gain (sensitivity) for the horizontal, slant and vertical modes. Adjust it so fish echoes are clearly displayed with minimal noise on the screen. Too high a gain setting not only displays excess noise and makes it difficult to discriminate wanted echoes but also causes bottom echoes to be painted in strong colors, resulting in echoes being masked by bottom reflections. Normally, set the control somewhere between positions 3 and 7.

㪥

㪮

㪈㪇㪇㪇㪈㪌㪇㪇㪌㪇㪇㪈㪇㪇㪇㪈㪌㪇㪇

㪌㪇㪇

㪉㪇㪇㪇

㪈㪇㪇㪇

㪭㪉㪭㪈

㪪

V1 & V2 mode

㪈㪉

NUMERIC/

GRAPHIC

㪜

DATA

㪌㪇㪇

DISPLAY

㪌㪇㪇

㪈㪇㪇㪇

Gain too low

Gain proper

Gain too high

1. If the horizontal and vertical modes are active, press the H/V/S key to show the range and gain indications of the mode you wish to adjust. Pressing the H/V/S key changes the color of the range and gain indications to orange.

• H1/H2: Horizontal1 or horizontal2

• H/S: H or S display

• V1/V2: H or V display

2. Adjust the GAIN control.

New gain setting is momentarily displayed in large characters at the top of each display. The setting value is always displayed next to “G“. (For the vertical display, the gain indication is shown at the bottom of the display.)

Note: The gain can also be adjusted from the gain indication. Put the cursor on the gain indication to highlight it in yellow then roll the scrollwheel.

1-11

Page 24

1. OPERATIONAL OVERVIEW

1.7 How to Use the Menu

Most operations are carried out from the menu. This section provides basic menu operating information.

1. Press the MENU/ESC key to open the main menu.

Menu title

Select “Shortcut Menu” to show the menu title you programmed. (See section 6.1.)

The descriptions for the selected item appears in this field.

Select QUIT with trackball and then left click to close the menu.

“...” means that this item has sub menus.

Note: You can also show the main menu by pushing the right-click button to show the pop-up menu. See page 1-14.

2. Operate the trackball to place the arrow cursor on the item you want to select. The yellow cursor marks the current selection. You can also use the scrollwheel to select a menu item.

3. Push the left-click (or right-click, scrollwheel) button. If you selected [TX/RX Setting] at step 2 for example, the following menu appears.

Scanning mode tab

This icon means that this item is assigned to a function key.

4. Press the H/S/V key to select the display mode.

• H1, H2 tab: Items for horizontal display setting

• S tab: Items for the slant display setting

• V tab: Items for the vertical display setting

Items which you cannot set are shown in gray.

5. Select the item then push the left-click button.

(Numeric window) (Item window)

1-12

Page 25

1. OPERATIONAL OVERVIEW

6. Select the setting.

• (Numeric) Select S to increase the value then push the left-click button (or roll the scrollwheel upward). To decrease the value, select T and push the left-click button (or roll the cursor scrollwheel downward).

• (Items) Select an item then push the left-click button.

7. Select [Quit] on the setting box then push the left-click button to close the box. If you want to cancel the setting, select [Cancel].

8. Long-press the MENU/ESC key to close all menus. You can also close all menus by selecting [Quit] on the active menu and longpushing the left-click button.

Note 1: You can relocate menu windows. Use the trackball to put the arrow cursor on the menu is title (blue when menu is active), push the left-click button, drag window to new location then release the left-click button. The position of the menu windows is saved.

Note 2: In the default setting, the sub menu item [Initial Setting] in the [Others] menu and some items in the [Initialization] menu are shown in red. This means these items are locked to prevent accidental change of setting. When you open one of these sub menus and select an item, the confirmation message shown below appears. To change the setting of the selected item, select [Changeable] and push the left-click button to show the dialog box for the item. To escape, select [Cancel] then push the left-click button.

If you do not want to show the confirmation message above, see page 7-16.

Note 3: If two menu items are functionally related, the setting of one menu item causes restriction to another menu item. In this case, the equipment ignores both settings to use different ones or invalidates the setting of the item encountering restriction. The invalid setting value or menu item is shown in gray.

1-13

Page 26

1. OPERATIONAL OVERVIEW

Pop-up menu operation

Push the right-click button on the numeric/graphic data display to show the pop-up menu. These items can be accessed from the main menu.

1-14

Page 27

2. HORIZONTAL MODE

2.1 Basic Operating Procedure

Lower transducer.

: Mid protrusion

Turn on power.

䋺Full protrusion

MENU/

ESC

䌆1

AUTO

䌆2

TILT

USER PROG

䌆3

DISP

MODE

䌆4

SHOOT

GAIN

䌆5

Adjust gain.

V1/S V2

OFF

AUTO

CENTER

TRAIN

R/B

DELETE

AUDIO

MARK

H/V/S

䌆7

䌆6

Press to choose the screen (horizontal or vertical,

EVENT

ESTIMATE

TARG ET LOCK

RANGE

䌆8

Select range.

EVENT

ESTI-

MATE

FISH

䌆10

䌆9

Set tilt angle.

or horizontal1 or horizontal2, or horizontal or half-circle) to adjust gain and range.

Select horizontical display.

Control unit

2-1

Page 28

2. HORIZONTAL MODE

2.2 Indications and Markers

2.2.1 Horizontal mode, full-screen display

The full-screen horizontal display provides a 360° picture around the boat. To display the full-screen horizontal picture, press the DISP MODE key.

Target lock mark

Net shoot data Distance run from shooting Time from shooting

Trackball data

Slant range

Horizontal range

Depth

Relative bearing

or True bearing*

Wind speed, direction*

Latest event marks

Auto train mark

Audio bearing mark

Heading mark

North mark*

Own ship mark

Current (tide) mark*

Range ring

Bearing scale

Event mark

Event mark data

Horizontal range

Present depth

Depth at time of

mark entry

Relative bearing

or True bearing*

* Requires appropriate sensor.

** Appears with head-up mode.

㪙㩷㩷㪈㪈㪌°

㪮㪈㪉㫄㪆㫊

㪉㪐㪇

㪉㪏㪇

㪮

㪉㪍㪇

㪉㪌㪇

㩷㩷㪋㪏㫄㩷㩷㩿㪉㪈㪇㫄㪀㪙㪊㪊㪇°

㪊㪇㪇

㪉㪋㪇

㪈㪋㪏㫄

㪈㪋㪏㫄㪈㪋㪉㫄

㪋㪌㫄

Cursor position

Fish track*

㪇㪅㪌㪈㪥㪤

㪌㪑㪊㪉

㪊㪉㪇

㪊㪈㪇

㪉㪊㪇

㪈㪍㪏㫄

㩷㩷㪋㪏㫄㩷㩷㩿㪉㪈㪇㫄㪀㪙㪊㪋㪇°

㪊㪋㪇

㪊㪊㪇

㪈

㪉

㪉㪉㪇

㪉㪈㪇

㪊㪋°㪌㪍㪅㪎㪏㪐㪥

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

Fish mark

Heading direction*,**

㪥

㪊㪌㪇

㪈

㪉

㪊

㪈

㪉

㪊

㪈㪌㪇

Range ring data

㪈㪐㪇

㪪

Net sonde mark*

Line connecting fish marks

㪈㪇

㪈

䊶

䊶䊶

䊶

䊶䊶䊶

䊶

㪏㪌

㪊

㪉

㪈

㪉

㪊

㪈㪎㪇

Net shoot mark

Latest fish mark

㪉㪇

㪊㪇

㪈

㪉㪊

㪈

㪉

㪊

㪈㪌㪇

㪩㪈㪋㪍㫄

㪈㪍㪇

㪙㪉㪐㪇°

Range mark and audio bearing mark data

㪟㪄㪬㪧

㪋㪇

㪈㪋㪇

㪟㩷㪩㪋㪇㪇㫄

㪘㪬㪫㪦

㪌㪇

㪈㪊㪇

㪪㪈㪉㪅㪊㫂㫅㪚㪉㪌㪍°

㪈㪎°㪫

㩿㪉㪈°㪀

㪞㪈㪅㩷㪇㪧㩷㩷㪏

㪍㪇

㪎㪇

㪈㪇㪇

㪈㪈㪇

㪈㪉㪇

㪉㪊㪇㫄

㪎㪇㫄

Presentation mode

Display mode

Scan data Range Current auto tilt Gain User program no.

Fish movement vector

Fish estimate mark no. Fish estimate mark

㪏㪇

Fish estimate mark data

㪜

Range mark

Cursor

Own ship position mark

Ship's track*

Target lock/fish movement data

Horizontal range

Depth

Speed

Course

2-2

Note 1: When the settings listed below are changed, the setting value is shown at the

top of the display for five seconds. The location of the setting value can be changed. Contact your dealer for details.

• Gain (See section 1.6.)

• Tilt angle (See section 2.4.)

• Automatic training (See section 2.13.3.)

• Display range (See section 2.3.)

• Automatic tilt (See section 2.4.2.)

• User program (See section 6.3.1.)

Note 2: The color of the event mark, fish mark, and fish estimate mark can be changed on the menu: main menu → [Others] → [Initial Setting] → [Mark Display] → [Mark Color].

Page 29

2.2.2 Horizontal2 mode

The H2 mode shows one of three kinds of horizontal display combinations: Landscape, Portrait or Inset as shown on page 1-9. Follow the procedure shown below to select a combination display. The zoom-out display (shown on the inset mode) can be moved by drag and drop operation and its size changed from the menu.

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [Display Setting] then push the left-click button.

2. HORIZONTAL MODE

4. Select [H2/S Display] then push the left-click button.

5. Select the desired option then push the left-click button.

6. Select [Quit] on the setting box then push the left-click button.

7. Long-press the MENU/ESC key to close all menus.

Note: Range, tilt angle, gain and program keys can be adjusted for each display.

2-3

Page 30

2. HORIZONTAL MODE

2.3 Display Range

The RANGE control selects the detection range and six ranges are preset at the factory. The range selected is momentarily displayed in large characters at the top of the screen. Range is always displayed next to “R“ at the top right of the screen.

Default settings for the display range (unit: m)

Range No. 1 2 3 4 5 6

Detection range 100 200 400 600 800 1000

Note: Ranges can be preset at the [H-Scan Range] on the [Others] - [Register] menu. See page 7-6.

1. If the vertical or slant display is active, press the H/V/S key to select the horizontal display. If the two horizontal displays are active, press the H/V/S key to select H1 or H2 to change the range. The range and gain indications of the horizontal mode must be in orange to change the range (and gain).

Bottom

Range displayed on display

Surface

2. Operate the RANGE control to select a range.

Note 1: The range can also be adjusted from the range indication. Put the cursor on

the range indication to highlight it in yellow then roll the scrollwheel.

Note 2: In the target lock function, the range is automatically changed according to target position if [Tilt Interlock] on the [Target Lock] menu is selected to [Tilt & Range].

2-4

Page 31

2.4 Tilt Angle

The tilt angle shows the direction to which the sound wave is emitted. When the sound wave is emitted horizontally, the tilt angle is said to be 0° and when vertically, 90°. The tilt angle can be set between -5° (upward) to 90° (downward), in increments of 1°. The tilt angles for horizontal 1 and horizontal 2 modes can be set independently of one another.

2.4.1 How to set the tilt angle

To set a tilt angle manually, operate the TILT control. Watch the tilt angle indication and tilt angle indicator at the top right corner of the screen. The tilt angle is shown next to “T“ at the top right of the screen.

Select tilt angle depending on target fish. For surface fish select a shallow angle (about 5°) and for bottom fish, a deep angle.

-5-degree

0-degree horizontal direction (tilt angle 0-degree)

Transducer

Tilt angle setting range

2. HORIZONTAL MODE

Note 1: In the factory default condition, the tilt angle can also be adjusted by rolling the scrollwheel.

Note 2: The tilt angle can also be adjusted from the tilt angle indication. Put the cursor on the tilt angle indication to highlight it in yellow then roll the scrollwheel.

Note 3: The TILT control functions as a bearing setting lever when the following con- ditions are met: [Tilt Lever] in the [Display Setting] menu is selected to [Tilt & V1], and the vertical display is chosen in the vertical mode.

2.4.2 Automatic tilt

The AUTO TILT key automatically scans the tilt angle within the selected width. This is useful when you want to find the center depth of a school of fish. Wide tilt angle is activated from the [Auto Tilt] on the [Others] - [Display Setting] menu.

1. Press the AUTO TILT key to select auto tilt angle desired. Each time the key is pressed the auto tilt angle changes in the following sequence.

OFF  [±1° - 4°]

+90-degree

[±2° - 6°]

[±3° - 8°

]

(Narrow)

OFF



[±2° - 10°]

[±4° - 16°]

[±6° - 20°

]

(Wide)

2-5

Page 32

2. HORIZONTAL MODE

2. If necessary operate the TILT control to change center tilt angle. In automatic tilt, “AUTO” is displayed at the top right corner. To disable automatic tilt, select OFF at step 1.

N-UP

R 400m

AUTO

17°T

(21

G10 P 8

Automatic tilt angle (narrow) with

Auto tilt is active

)

Current tilt angle

AUTO TILT key

Range (m) Width 1 Width2 Width3 Period

60, 100 150, 200 300, 400 500, 600 700, 800 900, 1000 Over 1100

±4°*; ±2° ±1° ±1° ±1° ±1° ±1°

±6°* ±4° ±2° ±2° ±2° ±2° ±2°

±8°* ±6°* ±4°* ±3° ±3° ±3° ±3°

Period: One transmission Note: Tilt angle changes in 2° increments for asterisk-marked width; 1° increments for all other widths.

Automatic tilt angle (wide) with AUTO TILT key

Range (m) Width 1 Width2 Width3 Period

60, 100, 150 200 300, 400 500, 600 700, 800 900, 1000 Over 1100

±10° ±10° ±10° ±8° ±6° ±4° ±2°

±16° ±16° ±16° ±16° ±12° ±8° ±4°

±20° ±20° ±20° ±20° ±16° ±12° ±6°

Period: One transmission

For example, when the RANGE control, TILT control and AUTO TILT key are set to 800 m, 8° and width (1) respectively, the tilt angle changes at each transmission as follows: 8°→ 9°→ 8°→ 7°→ 8°.

Set tilt angle

Note 1: The AUTO TILT key is inoperative when the target lock function is active or is made active. Auto tilt is available when the target lock is OFF.

Note 2: If the picture set with auto tilt is not visible, disable auto tilt and try again.

2-6

Page 33

2.4.3 Relation between bottom echo and tilt angle

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

Case 1: Tilt angle 30° to 40°: This tilt angle will display the entire bottom since it is captured by the full width of the beam. The school of fish is obscured by the bottom.

Case 2: Tilt angle 10° to 20°: This tilt angle will only display half the bottom since it is captured by only the lower half of the beam. The school of fish is located above the bottom.

Case 3: Tilt angle 0° to 5°: This tilt angle may or may not capture the bottom since the returning bottom echo is weak. The school of fish is located close to the bottom.

2. HORIZONTAL MODE

Case 1

Case 2

Case 3

Case 1

Points to consider

• Normally, a vertically distributed school of fish is a better sonar target than the bottom, because it reflects the transmitted pulse back toward the transducer.

• In case 3, both schools of fish "a" and "b" are presented. Generally speaking, however, midwater schools of fish tend to be larger than schools of fish on the bottom and they are often displayed near the bottom on the display.

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

2-7

Page 34

2. HORIZONTAL MODE

2.4.4 Tilt angle for surface fish

Sound emitted from the sonar transducer forms an oval-shaped beam with a width of approximately 10° in the vertical direction (vertical beam width at -6dB). The tilt angle indicates the angle between the centerline of the beam and the horizontal plane. Then, if the tilt angle is set to 0°, the centerline is parallel with the sea surface and one half of the emitted sound goes upward, toward the sea surface.

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

However if the sea is not calm enough, they will become dominant and interfere with observation of wanted echoes. To minimize these sea surface reflections and to search for schools of fish on the surface effectively, the tilt angle is usually set between 4° and 5° 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°

10°

Sea surface

Tilt angle 4-5°

10°

2.4.5 Suitable tilt angle

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

Tilt angle setting: relationship between tilt angle and detection range

100

(200)

20(40)

40(80)

60(120)

80(160)

100(200)

Depth (m)

200

(400)

300

(600)

400

(800)

Range(m)

Tilt 0°

(0°-5°)

Tilt 5°

(0°-10°)

Tilt 10°

(5°-15°)

In grey

Tilt 15°

(10°-20°)

200(400)

Vertical width of sonar beam

10°

2-8

100 m100 m

17 m

200 m

35 m

300 m

(-6dB)

52 m

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2. HORIZONTAL MODE

2.5 How to Measure Range and Bearing to a Target

Operate the trackball to place the cursor on the target you want to measure the range and bearing. The range, bearing and depth to the target appear at the upper left corner of the screen.



TRACKBALL DATA



Slant range



Horizontal range



Depth B Relative or True bearing

 

㪙

Cursor

Heading line

Own ship mark

Cursor L/L position

㩷㩷㩷㩷㪊㪋°㪌㪍㪅㪎㪏㪐㪥

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

Note 1: Trackball position may also be shown in latitude and longitude. For further details, see "Cursor Position" on page 7-12.

Note 2: The bearing display is available in four formats. See "Other Marks" on page 7-

12.

2.6 How to Eliminate Weak Echoes

Echoes from targets such as bottom and fish return to the transducer in order of distance to them, and when we compare their intensities at the transducer face, those from nearer targets are generally stronger due to little propagation attenuation and little absorption. If these echoes are displayed directly on the screen, the size of the displayed echo from the same school of fish may change with distance, making it difficult to judge the actual size of the school of fish. To overcome this inconvenience use the TVG curve function. This function 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 the similar intensities irrespective of the ranges to them.

TVG curve

Four TVG curves are available and they vary the gain from large to small.

1. Press the MENU/ESC key to open the main menu.

2. Select the [Gain Setting] menu then push the left-click button.

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2. HORIZONTAL MODE

3. Press the H/V/S key to select [H1] or [H2] tab.

4. Select [Sel TVG Curve] then left-click.

5. Select a TVG curve then push the left-click button. The smaller the number, the gentler the gain change over distance.

6. Select [Quit] on the setting box then push the left-click button.

7. Long-press the MENU/ESC key to close all menus.

The TVG is also used to suppress unwanted echoes (sea surface reflections, cruising noise, etc.) on near ranges. If the selected curve does not provide satisfactory results, try to adjust [TVG-Near], [TVG-Medium] or [TVG-Far], as shown below.

TVG distance and setting

This sonar has three TVG functions, NEAR, MEDIUM and FAR, and they mainly compensate for propagation

Near

Approx. 100 m

Approx. 400 m

Med

loss on short, middle and long ranges respectively, centered

Far

Approx. 800 m

at the ranges shown below. The higher the TVG setting, the greater the amplification of echoes.

1. Press the MENU/ESC key then push the left-click button to open the main menu.

2-10

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select [H1] or [H2] tab.

Page 37

4. Select [TVG Distance] then push the left-click button.

5. Select [Changeable] then push the left-click button.

Current settings

6. Select [Near], [Med] or [Far] as appropriate then push the left-click button to change the setting. Near: Setting range, 50 - 150 m, 10 m increments. Med: Setting range, 300 - 500 m, 20 m increments Far: Setting range, 600 - 1000 m, 40 m increments

7. Select [Quit] on the setting box then push the left-click button. Adjust the TVG level for selected TVG distance as follows.

2. HORIZONTAL MODE

Select item with trackball; push left-click button to adjust.

8. Select [TVG-Near], [TVG-Med] or [TVG-Far] as appropriate then push the leftclick button.

9. Select S or T as appropriate then push the left-click button to change the setting. The setting range is -5 to 5. The higher the setting value, the higher the gain. For strong echoes such as sea surface reflections or plankton layer lower the setting by 1 or 2.

10. Select [Quit] on the setting box then push the left-click button.

11. Long-press the MENU/ESC key to close all menus. Note: When a school of fish is located on a long-range setting (about 800 meters) and is approaching own ship do as follows:

1) Adjust the tilt to keep the school of fish in the center of the sonar beam, name-

ly, the school of fish is displayed in strongest colors possible.

2) Confirm that the fish echo is displayed in the same color as it approaches.

3) If the color suddenly changes to weaker colors as the fish enters MEDIUM and

NEAR areas, the TVG is improperly set. Adjust the TVG.

4) If this setting produces sea surface reflections and noise, try to remove them

with the AGC (section 2.7.1) and noise limiter (section 2.9.5).

Absorption coefficent

Attenuation of the acoustic pulse underwater varies with sea area and water temperature. This absorption can be compensated by adjusting the absorption coefficient. In most cases, no adjustment is necessary. If sensitivity decreases with distance, increase the absorption coefficient setting. And if it increases with distance decrease this setting.

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2. HORIZONTAL MODE

2.7 How to Adjust Strong, Weak Echoes

2.7.1 AGC

The AGC function automatically reduces the receiver gain only against strong echoes such as the bottom or a large school of fish. Since the AGC function does not affect weak echoes, a small school of fish becomes easier to detect. Adjust it so that the AGC works only on bottom reflections. Do not set it too high; weak echoes may be missed.

1. Press the MENU/ESC key to show the main menu.

2. Select the [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select [H1] or [H2].

4. Select [AGC] then push the left-click button to show the setting box.

5. Select S or T then push the left-click box to change the setting.

The setting range is -20 to 20. The higher the setting, the higher the degree of suppression.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

2.7.2 Near AGC

When the water is shallow or heavily sedimented, the unwanted and scattered echoes from close-in may be excessively strong. In this case, a school of fish which is displayed at between 300 and 500 m may disappear gradually when the ship starts approaching the school of fish.

Use the Near AGC feature to suppress this strong echo. Normally set it between 3 and 4, however, this setting depends on the sea condition. Do not set it too high; all echoes (including noise) from near distance may be painted in red.

1. Press the MENU/ESC key to show the main menu.

2. Select the [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select [H1] or [H2] tab.

4. Select [Near AGC] then push the left-click button to show the setting box.

5. Select S or T then push the left-click button to change the setting. The setting range is -20 to 20. The higher the setting, the stronger the echo level on near range.

2-12

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

Note: The range which Near AGC covers is set at [Near AGC Distance] in the [Near AGC] menu. The setting range is 20 to 200 m (20 m step). The setting range can be changed. For details, contact your dealer.

Page 39

2.7.3 2nd AGC

While it is ideal to suppress bottom echoes with the AGC alone there are some fishing grounds where this is not possible. (The high power sonar has the advantage of longrange detection but this can also be a disadvantage, since weaker echoes may be hidden in strong, unwanted echoes such as the bottom.) If you cannot suppress bottom echoes or sea surface reflections by the AGC function alone, use the 2ND AGC feature. Normally a setting of 1 or 2 is suitable. For especially strong echoes, use a setting of 3 or 4.

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click box.

3. Press the H/V/S key to select the [H1] or [H2] tab.

4. Select [2nd AGC] then push left-click button.

5. Select [2nd AGC] again then push the left-click button.

2. HORIZONTAL MODE

6. Select S or T then push the left-click button to change the setting.

The setting range is 0 to 20. The higher the setting, the stronger the suppression on long range.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Other AGC-related items on the [2ND AGC] menu

Distance: Set the start range for the 2nd AGC. The setting range is 0 - 2000 m, in 20

m increments. 2nd AGC is inoperative if the display range is lower than the 2nd AGC start range.

Type: Select the TVG type for 2nd AGC. Select [Normal] for everyday use.

Post 2nd AGC-Near*: Set the near range threshold for [Post 2nd AGC]. The larger

the figure, the greater the suppression.

Post 2nd AGC-Far*: Set the far range threshold for [Post 2nd AGC]. The larger the figure, the greater the suppression.

Post 2nd AGC-Dist*: Switch between Far and Near Post 2nd AGC.

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2. HORIZONTAL MODE

Exclusive Rng S: This feature prevents use of the 2nd AGC, Post 2nd AGC in a certain area at the stern, where unwanted echoes (such as screw noise) can interfere with the 2ND AGC or Post 2nd AGC feature. Set the area of exclusion on the setting dialog box. In the example at right the area of exclusion is ±45°.

*The [Post 2nd AGC] functions independently of [2nd AGC]. If the [2nd AGC] cannot suppress the bottom echo or sea surface reflections, try to suppress them with the [Post 2nd AGC]. For particularly strong echoes raise the AGC setting.

2.7.4 How to shorten pulse length

The pulse length determines the length of the transmission pulse emitted into the water. While a longer pulse is advantageous for long-range sounding, it has the disadvantage of being poor in discrimination of targets, that is, the ability to separate several closely located targets. When searching bottom fish, therefore, it is useful to shorten the pulse length in order to separate fish echoes from bottom reflections.

-45°

Area of exclusion

+45°

Note: For search of surface and midwater fish in which bottom reflections are not so strong, use the longest pulse length "9".

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the leftclick button.

3. Press the H/V/S key to select [H1] or [H2] tab.

4. Select [TX Pulse Length] then push the leftclick button.

5. Select S or T then push the left-click button to change the setting. The setting range is 0-9. The higher the setting, the longer the pulse length.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

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2. HORIZONTAL MODE

2.8 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters

In shallow fishing grounds with hard or rocky bottom, bottom reflections often interfere with wanted fish echoes and they can not be eliminated sufficiently with the aforementioned TVG and AGC functions, especially when the Tilt is set to a larger angle in order to track schools of fish approaching within 400 m. In such cases try to reduce the output power by adjusting the Tx power instead of turning down the gain. The picture becomes clearer when the output power is reduced rather than when the GAIN is decreased as illustrated below.

INCORRECT METHOD

CORRECT METHOD

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select [H1] or [H2] tab.

Fish echo

TVG and AGC adjusted with TX POWER kept high

Reduce TX POWER with GAIN kept constant

Fish echo weakened

Fish echo

4. Select [TX Power] then push the left-click button.

5. Select S or T then push the left-click button to change the setting. The setting

range is 0-9. The higher the setting the greater the TX power.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

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2. HORIZONTAL MODE

2.9 How to Reject Sonar Interference and Noise

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

2.9.1 How to identify the noise source

To eliminate noise effectively, you should first identify the noise source as follows:

1. Stop transmission on the [Test] menu; turn on [TX]. Turn on the power of all onboard equipment one by one while observing the picture. If noise appears on the sonar display, that equipment is emitting noise. Check the offending equipment's ground and installation.

2. Run the boat at various speeds to check if the noise is speed dependent.

If neither of the above two steps has effect on the picture, adjust one of the following:

2.9.2 Change TX interval

When other sonars nearby are operating the same transmission interval as that of own ship's sonar, rings of interference appears on the display.

To remove the rings from the screen, do the following:

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select [H1] or [H2] tab.

4. Select [TX Interval] then left-click.

5. Select S or T then push the left-click button to change the setting. The setting range is 0-9. The higher the setting, the longer the TX interval. [EXT KP] is for external KP synchronization; however, adjustment on the System menu is required. See the installation manual.

6. Select [Quit] on the setting box then push the left-click button to close the box.

Tx interval high Tx interval lowered

Interference

2-16

7. Long-press the MENU/ESC key to close all menus.

Note: When you operate the sonar with the following settings in shallow water, the sea

clutter from the previous transmission may appear in near range. To suppress this clutter, reduce the [TX Interval] by 2 or 3.

• Range: 60 to 200 m

• TX Pulse setting: 9

Page 43

2.9.3 Interference rejector

This control is similar to the interference rejector on echo sounders and radars. It is effective for rejecting random noise and sea surface reflections in rough sea conditions. Set it so that noise is just eliminated. Do not use an unnecessarily high setting since it may also reject small, wanted echoes.

1. Press the MENU/ESC key to show the main menu.

2. Select [Picture Setting] then push the leftclick button.

3. Press the H/V/S key to select the [H1] or [H2] tab.

4. Select [Int Reject] then push the left-click button.

5. Select S or T then push the left-click button to change the setting. The setting range is 0-3. The higher the setting, the greater the degree of interference rejection.

6. Select [Quit] on the setting box then push the left-click button to close the box.

2. HORIZONTAL MODE

7. Long-press the MENU/ESC key to close all menus.

2.9.4 Shift TX frequency

If the interference cannot be suppressed by the interference rejector or change in TX interval, shift the TX frequency from the [Frequency] menu.

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [H1] or [H2] tab.

4. Select [Frequency] then push the left-click button.

5. Select [Freq Shift1] then push the left-click button.

6. Select S or T then push the left-click button to change the setting. The setting range is -65 to 65.

7. Select the [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Note 1: In some cases the frequency cannot be changed because of operating bandwidth. In this case the frequency setting is grayed.

Note 2: The setting for [Freq Shift2] is valid when [Sidelobe Sup. A] (see section 2.9.9.) is set between -3 and -1. Set [Freq Shift1] well apart from [Freq Shift2] to better suppress sidelobes.

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2. HORIZONTAL MODE

2.9.5 Noise limiter

Weak, unwanted reflections, colored light-blue or green, appear when the water is dirty, plankton layers exists, or due to ship’s noise. The noise limiter can reduce the effects of these unwanted reflections. Raising the setting causes unwanted reflections to be displayed in colors of blue to background color.

1. Press the MENU/ESC key to show the main menu.

2. Select [Display Setting] then push the left-click button.

3. Press H/V/S key to select the [H1] or [H2] tab.

4. Select [Noise Limiter] then push the left-click button.

5. Select S or T; then push left-click button to change setting. The setting range is

0 to 15. The higher the setting, the higher the degree of the suppression.

6. Select [Quit] then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

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2.9.6 Reverberation

You may select the length of reverberation for the echo signal, with [Reverberation] on the [TX/RX Setting] (H1 or H2 tab). The setting range is 0-3. The larger the value, the lower the reverberation effects. Set the length of reverberation properly to make it easier to see the echo signal.

2.9.7 Echo average

[Echo Average] (H1 or H2 tab) on the [Picture Setting] menu adjusts echo afterglow the amount of time an echo signal remains on the screen. This feature can be useful for watching echo movement. The setting range is 0-7. Setting between 1 and 3: Echoes are gradually displayed and afterglow remains on the screen longer as the setting is increased.Setting between 4 and 7: Echoes are quickly displayed and afterglow remains on the screen longer as the setting is increased.

2.9.8 Reference bearing in frequency shift

The reference bearing in frequency shift can be changed to avoid sonar interference and noise. If noise or interference appears at a specific bearing, change the value of the [Freq/Bearing Set] in the [TX/RX Setting] (H1 or H2 tab) - [Frequency] menu. The setting range is 0°-358° and the default setting is 0°.

2. HORIZONTAL MODE

Note: [Freq/Bearing Set] is valid when [Sidelobe Sup. A] (see paragraph 2.9.9) is selected to other than 0°).

2.9.9 How to suppress sidelobes

False echoes produced by sidelobes may appear on the display depending on the distribution pattern of a school of fish and the positional relationship between it and a marine object (reef, etc.) and wake reverberation. To reduce these sidelobes, use [Sidelobe Suppress] in the [TX/RX Setting] menu (H1 or H2 tab).

Sidelobe suppression A

Watch the echoes while adjusting the suppression. The setting range is -3 to 4 (0 is OFF). The larger the setting, the more the sidelobe is suppressed. For greatest suppression, use a negative setting (-3 to -1).

Note: When a negative value is used, [TX/RX Mode] in the [Display Setting] menu is automatically selected to [Alternative]. See "TX/RX Mode" on page 7-3 for details.

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2. HORIZONTAL MODE

Sidelobe suppression B

For greater sidelobe suppression, use [Sidelobe Sup. B]. The setting range is 1 to 5. The larger the setting value, the more the sidelobe is suppressed; however, the width of the beam increases thus resolution is lower. The negative value setting (-5 to -1) is effective for reducing the effects of screw noise.

The area in which to suppress sidelobes with [Sidelobe Sup. B] can be set with [Sidelobe Dir1] and [Sidelobe Dir2]. The setting range is 0°≤ [Sidelobe Dir1]

≤

[Sidelobe Dir2] ≤180°, symmetrical in port-starboard directions. An area can be set

when [Sidelobe Sup. B] is 0 - 5. In this case the settings of Dir1 and Dir2 are gray.

2.10 How to Adjust Beam Width

Area in which SIDELOBE SUP. B works (portstarboard symmetrical)

Sidelobe bearing 1

Sidelobe bearing 2

Echo from screw noise

The width of the horizontal beam can be adjusted from the [Beam Width] menu.

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [H1] or [H2] tab.

4. Select [Beam Width] then push the left-click button.

5. Select the item to adjust then push the left-click button.

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2. HORIZONTAL MODE

Description of Beam Width menu

Beam Control: Control the beamwidth according to option selected. Manual: Se-

lect this item to enable adjustment of the other items in this menu. Range: The beamwidth is automatically controlled with the range setting. Tilt: The beamwidth is automatically widened as tilt goes deep. This is convenient for keeping a watch on fish that ascend and descend.

TX Beam Width*: Increase the value to display close-range echoes clearly. Hor. RX Beam Width*: Increase the value to improve horizontal resolution. Ver. RX Beam Width*: Increase the value to improve vertical resolution to distin-

guish fish echoes from bottom echoes.

RX Beam Control: Increase the value to improve horizontal resolution.

Note: When [RX Beam Control] is set to 1 - 3 and [Sidelobe Sup. B] is set to other

than 0, [TX/RX Mode] on the [Display Setting] menu is automatically selected to [Alternative]. See "TX/RX Mode" on page 7-3.

*: Available only when [Beam Control] is set to [Manual].

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

2.11 How to Track a School of Fish

The target lock function automatically tracks a school of fish so you will not lose sight of it on the display. Two types of target lock are available: position tracking and tracking of school of fish. Select one from the menu as shown in the procedure that follows. The default setting is tracking of school of fish. Speed and bearing data are required.The FSV-85 cannot track a school of fish if the level of the echo is too weak.

Track of school of fish*

* [FISH] mode

TARGET LOCK MARK

One target lock mark is shown. For the Horizontal 2 and Slant combination displays, the mark is shown on the applicable display. The target lock mark does not appear on the displays where it can not be inscribed.

Vector Length: Speed of movement Direction: Direction of movement

2.11.1 How to select the target lock mode

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [Initial Setting] then push the left-click button.

4. Select [Changeable] then push the left-click button.

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2. HORIZONTAL MODE

5. Select [Target Lock] then push the left-click button.

6. Select [Tracking Method] then push the left-click button.

7. Select [Fish] or [Target Mark] then push the left-click button. See paragraph 2.11.2 and paragraph 2.11.3.

8. Select [Quit] on the setting box then push the left-click button to close the box.

9. Long-press the MENU/ESC key to close all menus.

2.11.2 Fish mode

The automatic echo target lock function automatically tracks the operator-selected school of fish. When [TILT INTERLOCK] on the [TARGET LOCK] menu (previous page) is set to [TILT & RANGE], and the tracked school of fish goes out of the zone in the range direction, the range and tilt are automatically controlled according to the position of the school of fish.

1. Select [Fish] in the procedure in section 2.11.1.

2. On the horizontal display, use the trackball to select the school of fish to track.

3. Press the TARGET LOCK key. The target lock mark (white) with vector is put on the school of fish. The vector shows the speed and direction of movement of the school of fish. The tip of the vector is the estimated position of the school of fish when the vector time elapses. The target lock mark appears on the vertical display, however the vector is not shown.

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If the target is lost, the target lock mark changes to red color and the tracking mode changes to position mode (see next section) at that position. When the sonar detects and tracks the target again, the FISH mode is restored.

4. To disable the target lock, press the TARGET LOCK key.

2.11.3 Target mark mode

Target lock mark

Track of school of fish (Turned ON or OFF on Mark Display menu.)

TARGET LOCK DATA

2975m (Horizontal range)

153m (Depth)

12.3kn (Speed)

Vector (Heading data required)

256° (Course)

2. HORIZONTAL MODE

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

AB CD

Depth

1. Select [Target Mark] in the procedure in section 2.11.1.

2. On the horizontal display, use the trackball to select the location to track.

3. Press the TARGET LOCK key. Tilt, range and vertical bearing are automatically adjusted to track the location. Using the figure above as an example, the target lock mark is placed on location E. Then, the equipment remembers the location of E and automatically changes the tilt angle as the ship moves from position A through D. As long as the school of fish E is stationary its echo is kept displayed on the screen.

4. To disable the target lock, press the TARGET LOCK key.

2.11.4 Target lock menu description

Target lock functions not previously mentioned are described below.

Tilt Interlock: Provides automatic change of tilt angle and range or tilt angle in target lock. (Setting options: [OFF], [Tilt], [Tilt&Range])

Mark Interlock: Turns numeric/graphic data displays ON/OFF in target lock. [Off] turns off both the estimate mark 1, 2 histogram and data display. [Estimate Mark] enables the estimate mark 1, 2 histogram. [Est & Fish Info] enables the both the estimate mark 1, 2 histogram and data display.

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2. HORIZONTAL MODE

Tracking Data: Selects which target lock tracking data to use, horizontal or slant, or both horizontal and vertical.

Threshold: Selects the minimum signal level to use in target lock tracking. The setting range is 1 to 30. Target lock tracks a target whose signal level is greater than set here.

Bottom Threshold: When a target is judged as a bottom echo, raise this setting to differentiate bottom from target. The setting range is 0 to 5.

Target Speed Limit: Sets maximum fish speed to track. The setting range is 1kn to 15kn.

Smoothing: Sets smoothing rate for fish speed data. The higher the figure, the smoother the position of the target lock target. Avoid oversmoothing, to prevent delay in tracking when own ship or target moves suddenly. The setting range is 0.0 to 1.0.

Target SPD Update: Sets the interval at which fish speed data is updated. The intervals are 15, 30, 45 and 60 seconds.

Target Lock Window: Selects the size of target lock detection area; normal, large, largest. (The area is not indicated on the screen.)

Dimension Setup: Sets dimension constant for calculation of weight (ton) of school of fish from the dimension of the school of fish.

Volume Setup: Sets volume constant for calculation of weight (ton) of school of fish volume.

2.12 Presentation Mode

2.12.1 Presentation mode description

This sonar has four presentation modes, head-up, north-up, course-up and true motion. Select one with [Presentation Mode] in the [Others] - [Display Setting] menu.

㪜㪆㪪

㪥

Head-up

N N

North-up True Motion

Course-up

2-24

Head-up: The display is oriented toward ship’s heading. The heading direction ap-

pears at the top of the display. Own ship position is fixed at the screen center. Echoes from fish and the bottom move on the screen relative to own ship’s movement. This mode is useful for general use.

North-up: The display is oriented so North is at the top of the screen. Own ship position is fixed at the screen center and own ship mark pivots with ship’s movement. Echoes from fish and the bottom move on the screen relative to own ship’s movement.

Course-up: The display is oriented according to course. Own ship position is fixed at the screen center. Echoes from fish and the bottom move on the screen relative to own ship’s movement. Targets are displayed at ship’s bow.

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2. HORIZONTAL MODE

True Motion: Stationary objects are fixed and own ship and fish echoes move on the display in accordance with their true courses and speeds. Thus you can observe own ship and fish echo movement with respect to the bottom. This mode requires speed and heading data. When own ship mark reaches an edge of the off-center effective area it is automatically returned to the screen center as below.

Offcenter effective area

(a) Own ship mark reaches an edge of offcenter effective area

(b) Own ship mark is automatically returned to screen center

Automatic return of own ship mark in true motion

2.12.2 How to select a presentation mode

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [Display Setting] then push the left-click button.

4. Select [Presentation Mode] then push the left-click button.

5. Select desired mode then push the left-click button.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

Note: The true motion display range may be set to 1.3 to 1.6 times the range with [TM Disp Range] on the [Display Setting] menu.

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2. HORIZONTAL MODE

2.13 How to Detect Schools of Fish Aurally

Sometimes you may be preoccupied with other tasks and unable to concentrate on watching the sonar picture. In such cases it would be a good choice to use the audio function. This function enables you to monitor echoes from schools of fish and bottom through the external speaker.

2.13.1 How to set the bearing

In the default setting, the audio function is on and the audio sector is 30°.

1. Operate the trackball to place the cursor on the direction you want to monitor through the speaker.

2. Press the R/B AUDIO key.

The monitoring section is set on the bearing selected, in a 30°, 60°, 90°, 180° or 330° sector centering the audio bearing mark. Echoes are monitored through the speaker.

Monitoring section

Audio bearing mark

Range marker

R 400m B 45°

Data for range and audio bearing marks

Note: To erase the range mark and the data at the bottom of the screen, put the cursor near own ship mark and press the R/B AUDIO key. Note that the audio bearing is erased when [Audio] on the [Alarm & Audio] menu is turned off.

2.13.2 How to select the audio sector

Select the audio sector as follows. Note that you cannot see this sector on the display.

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [Alarm & Audio] then push the left-click button.

* In target lock, the audio bearing mark follows tracked target.

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4. Select [Audio Sector] then push the left click button.

5. Select desired sector then push the left-click.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

2.13.3 Automatic training

You may automatically scan the audio sector and audio bearing mark in the sector of 12°, 24° or 36° as shown below.

1. First activate the range and audio bearing marks with the R/B AUDIO key.

2. While pressing and holding down the AUTO TRAIN key, press the R/B AUDIO key to select desired auto train sector among 12°, 24° or 36°, or OFF to disable automatic training. Watch the auto train mark to know the currently selected sector. The chosen sector appears in large characters for five seconds at the top of the screen.

2. HORIZONTAL MODE

Auto train mark

Note: Select [Off] at step 2 to stop the training.

Auto train secto

Audio bearing mark

2.13.4 Reverberation for audio signal

You may choose the length of reverberation of the audio signal, with [Reverberation] on the [Alarm & Audio] menu. The larger the value the longer the reverberation, which makes it easier to hear the audio signal. The setting range is 0-9 and the default setting is 0.

2.14 Fish Alarm

The fish alarm sounds the aural alarm when a fish echo above a preset strength enters the operator-set alarm zone.

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [Alarm & Audio] then push the left-click button.

4. Select [Fish Alarm] then push the left-click button.

5. Select [ON] then push the left-click button.

6. Select [Quit] from the setting box then left-click to close the box.

7. Select [Alarm Zone] then push the left-click button.

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2. HORIZONTAL MODE

8. Operate the trackball to place the cursor on the starting point of the alarm zone.

9. Push the left-click button.

10. Rotate the trackball clockwise to select the ending point. The display paints a fanshaped alarm zone. The alarm range appears on the display as shown below.

<< Alarm Zone >>

Move trackball cursor to origin of alarm zone and left click. Press [R/B] key or right click to cancel.

<< Alarm Zone >>

Move cursor to the end of alarm range and left click. Press [R/B] key or right click to cancel.

Fish alarm range

11. Push the left-click button.

12. Long-press the MENU/ESC key to close all menus. When a fish echo enters the alarm area the buzzer sounds.

Note 1: There must be at least three degrees difference between the starting and ending points to get a fan-shaped alarm zone as shown in (a) and (b) below. Otherwise, the unit paints a 360-degree alarm zone as in (c) where there is less than 3 degrees between the starting and ending points.

More than 3°

(a) (b) (c)

Within 3°

Note 2: The echo strength which triggers the alarm can be set with [Alarm Level] on the [Alarm & Audio] menu. The setting range is 0-30. This value corresponds with the 32-echo colors.

To disable the alarm, select [OFF] at the step 5.

2.15 How to Relocate a School of Fish

The offcenter feature relocates a school of fish.

1. Operate the trackball to place the cursor on the position where you want to relocate the own ship mark.

2. Press the OFF CENTER key.

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2. HORIZONTAL MODE

3. To move the own ship mark back to the screen center, press the OFF CENTER key again.

School of fish

Press OFF CENTER key

Own ship mark

Set cursor here, for example,

Note: You can also move the display by long-pressing the left-click button. To restore the normal display, long-press the right-click button.

Own ship mark moves to trackball position,

2.16 How to Compare Concentration of School of Fish

2.16.1 How to compare with the fish estimate mark

You can get an estimate of the volume of two schools of fish by using the two ESTIMATE keys as follows:

1. Operate the trackball to place the cursor on a school of fish, and then press the

ESTIMATE 1 key. The estimate mark 1 appears on the school of fish. Relative volume is shown by a figure between 0 and 100, below the estimate mark. When the area inside the mark is filled in reddish brown, volume figure is said to be 100. When the estimate mark is entered, a graph is shown at the histogram on the numeric/ graphic data display.

2. Operate the trackball to place the cursor on another school of fish, and then press

the ESTIMATE 2 key. Compare estimate figures for each school of fish by observing estimate mark data and the fish histogram.

3. To turn off the estimate marks press their respective keys.

Note: The fish school mark and event mark 1 can be entered with the fish estimate mark. For details, contact your dealer.

Estimate mark 1

North mark

Relative fish volume

Estimate mark 2

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2. HORIZONTAL MODE

Fish histogram

The fish histogram shows, in graph form, signal strength distribution for the school(s) of fish marked with an estimate mark on the horizontal/slant displays. The histogram display for each of those displays will be different since the calculation method is different. This data appears only when an estimate mark is active. When two estimate marks are active, histograms are displayed one on top of the other as below. The horizontal axis shows signal strength in 16 colors, and the vertical axis shows the concentration of a school of fish inside the fish estimate mark. For the fish estimate mark inscribed on the horizontal display (or slant display) the graph shows the average movement in five scans, to increase accuracy.

2 1

Scan1

Fish estimate mark source

Fish estimate mark no.

Scan1

Scan2

Fish estimate mark source

Estimate mark 1 or estimate mark 2 displayed

Both estimate marks displayed

Note: The histogram display is redrawn five transmissions after a fish estimate mark is erased and another mark of the same number is entered soon after.

2.16.2 How to compare with the circle cursor

You can get an estimate of the volume of two schools of fish with the circle cursor as follows:

1. Push the scrollwheel to show the [Select Mark] window.

Selected mark name

Circle cursor

2-30

Scan mode in which mark can be entered

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2. HORIZONTAL MODE

2. Select the circle cursor and push the left-click button.

The [Select Mark] window disappears, then the cursor is changed to the circle cursor.

㪏㪊㫄

Diameter of the circle cursor

3. Place the circle cursor on a school of fish.

4. Rotate the scrollwheel to adjust the size of the circle cursor.

Set the school of fish in the circle cursor to estimate correctly. The diameter of the circle cursor is displayed below the circle cursor.

5. Place the circle cursor on another school of fish to estimate the volume.

You can compare the volume of two schools of fish with the diameter of the school of fish.

6. Push the right-click to quit the measurement.

The circle cursor is changed to the normal cursor.

Note: The event mark 1, event mark 2, fish mark, target lock mark, estimate mark 1, and estimate mark 2 can be entered from the [Select Mark] window. Push the left-click button to enter the mark.

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2. HORIZONTAL MODE

2.17 How to Measure the Speed of a School of Fish

To ensure a good haul, it is important to estimate the direction and speed of the school of fish before shooting the net. You can do this with the FISH key. With tidal current data and fish speed data, you can determine the timing of the net shooting more efficiently. This function requires speed and heading data.

2.17.1 How to measure the speed of a school of fish

1. Place the cursor on the center of a school of fish then press the FISH key or push the left-click button. The latest fish mark ( ) appears on the school of fish.

2. Wait until the target fish moves a reasonable distance from the latest fish mark.

3. Place the cursor on the same school of fish selected in step 1 then press the FISH key. The latest fish mark appears on the target, the 2nd latest fish mark ( ) appears on the location selected at step 1 and any earlier fish marks are shown with an X. The distance between the two fish marks and speed, course, and bearing of the school of fish appear at the bottom right-hand corner of the horizontal display area.

Latest fish mark

Place the cursor on a school of fish and press [FISH] key.

Note 1: The time and distance between each press of the FISH key should be as long as possible to increase accuracy of measurement. For best results, repeat the procedure two or three times.

Note 2: Each time the FISH key is pressed the latest fish mark and ship's speed mark change in the sequence shown below. A maximum of 20 fish marks can be entered. When you enter more than 20, the earliest fish mark is erased.

WAIT A FEW MINUTES

2nd latest fish mark

Place the cursor on the school of fish’s current location and press [FISH] key again.

This data is the latest fish mark data.

Latest fish mark

Earlier fish mark (Max. 18)

FISH MOVEMENT DATA

(Distance moved)

2975m

S 12.3kn (Speed) CB256° (Course)

(Horizontal range to fish mark)

153m (Depth)

(Bearing)

235

2-32

[FISH]

key pressed once

twice

three times

four times

Page 59

2.17.2 How to delete fish marks

Fish marks can be deleted individually with the DELETE MARK key or by earliest entry from the menu.

How to delete fish marks with the DELETE MARK key

Use the trackball to place the cursor on the fish mark you want to erase. The color of the fish mark changes from white to red when the fish mark is correctly selected. Press the DELETE MARK key to delete the fish mark.

How to delete fish marks from the menu

1. Push the right-click button on the numeric/graphic data display to show the popup menu.

2. Select [Erase Marks] then push the left-click button.

2. HORIZONTAL MODE

3. Select [Fish Mark] then push the left-click button. Each push of the left-click button deletes the earliest fish mark.

4. Long-press the MENU/ESC key to close all menus.

Note: The default function of the F5 key deletes the earliest fish mark.

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2. HORIZONTAL MODE

2.18 Event Mark, Own Ship Position Mark

The event mark is useful for finding the horizontal range, depth and bearing to a location some distance from current position. 20 such marks may be inscribed on the horizontal display. This function requires speed and heading data.

There are two types of event marks, latest event mark 1 ( ) and event mark 2 ( ).

Each time an event mark is entered the latest event mark appears at the cursor posi-

tion and all other event marks are shown by marks and numbered in sequential order. When the memory capacity for event marks is reached the earliest event mark is automatically erased to make room for the latest.

2.18.1 How to enter an event mark

1. Set the cursor where you want to place an event mark.

2. Press an EVENT key. The horizontal range, depth and bearing to the event mark appear at the bottom left corner of the horizontal display area. The event mark 1 can be entered by pushing the right-click button.

234m: Horizontal range (m) from own ship mark 19m: Present depth (m) to mark (35m): Depth (m) of mark at moment EVENT key is pressed. B 265°: Present bearing (degree)

Bottom left-hand corner of the screen

Ex. Indications when the EVENT key is pressed

With speed and heading data the mark follows own ship’s movements. In the True Motion mode, the event mark is stationary. When the tilt angle is changed mark position changes with slant range. Note however that the mark’s position does not change when automatic tilt is active; the tilt center angle is used to position the mark.

Plotting an event mark on the display is equivalent to dropping a buoy with an anchoring chain that extends from surface to bottom. The buoy is fixed at its geographical location, but the marker on the display moves to a point where the present beam plane intersects the anchor chain of the buoy as the ship moves or the tilt angle is changed. This can be said about marks as well such as fish mark and cursor.

2-34

You observe picture from direction of mark.

(35)

Stored when EVENT key is pressed.

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2. HORIZONTAL MODE

2.18.2 How to enter an own ship position mark

Place the cursor close to the center of the own ship mark (U) and press the EVENT key. Ten own ship position marks may be inscribed. When the capacity for own ship position marks is reached the earliest own ship position mark is automatically erased.

Note: The SHOOT key can enter the own ship position mark. Set [Event Key] to [Shoot] on the [Mark Display] menu.

2.18.3 How to erase an event mark, own ship position mark

Event marks and own ship position marks can be deleted individually with the DELETE MARK key or by earliest entry from the menu.

Delete an event mark, own ship position mark with MARK DELETE key

Use the trackball to place the cursor on the event mark or own ship position mark you want to erase. The color of the mark changes from white to red when the mark is correctly selected. Press the DELETE MARK key to delete the mark.

Delete an event mark, own ship position mark from the menu

1. Push the right-click button on the numeric/graphic data display to show the popup menu.

2. Select [Erase Marks] then push the left-click button.

3. Select [Event Mark1], [Event Mark2] or [Own Ship Pos Mark] then push the leftclick button. Each push of the left-click button deletes the oldest event mark or own ship mark.

4. Long-press the MENU/ESC key to close all menus.

Note: The default function of the F3 (for event mark 1), F4 (for event mark 2) and F6 (own ship position) keys delete the oldest event mark or own ship mark.

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2. HORIZONTAL MODE

2.19 Net Course Mark

Before shooting the net, decide the shoot timing considering tide direction, distance to the school of fish and moving direction of the school of fish. Use the net course mark as a guide to decide the timing. This function requires speed and heading data.

How to enter the net course mark

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select the [Display Setting] then push the left-click button.

4. Select the [Net Course Mark] then push the left-click button.

Net course mark

<<Set net course mark>>

Move trackball cursor to net course mark position and left click. Press R/B key to cancel.

5. Use the trackball to position the net course mark, which is shown by a dashed circle.

6. Push the left-click button to set, and the dashed circle changes to a solid one.

7. Long-press the MENU/ESC key to close all menus.

Note 1: To delete the net course mark select [Delete] at step 4.

Note 2: The default function of the F10 key deletes the oldest net course mark.

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2.20 Net Behavior

㪈

㪉

With connection of a net sonde, you can observe net behavior after the throwing of the net. Accurate depiction of net sonde position depends on proper setting of the distances between net sonde transmitters. You can set those distances on the main menu[Others] - [Initial Setting] - [Net Sonde Setting] menu. This function requires speed and heading data.

To enable this feature, set [Event Key] to [Event] in the [Mark Display] menu, then do the following:

1. Press the SHOOT key just upon throwing the net into the water. The following actions occur:

• Net shoot mark ( ) appears at own ship position.

• Net shoot data appears at top of the display.

• Net sonde mark ( ) is inscribed.

• Net depth data is displayed.

2. To erase the net sonde mark and associated data, press the SHOOT key again.

1 2

2. HORIZONTAL MODE

㪥

㪊㪌㪇

-Range

-Erapsed time

㪈㪇

㪉㪇

Net sonde

data

B 296°

㪉㪐㪇

㪉㪏㪇

202m 193m 59m

㪊㪇㪇

Net shoot data

0.53NM 5:32

㪊㪉㪇

㪊㪈㪇

㪊㪋㪇

㪊㪊㪇

Net shoot mark

Current mark*

㪮

㪉㪍㪇

㪉㪌㪇

㪉㪋㪇

㪉㪊㪇

㪉㪉㪇

㪉㪈㪇

㪉㪇㪇

㪉

㪈

2000

㪈㪐㪇

㪪

㪈㪍㪇

㪈㪎㪇

Note: To turn the current mark on/off, see page 7-12.

㪥㪄㪬㪧

㪟㩷㪩㪊㪇㪇㫄

㪘㪬㪫㪦

㪊㪇

㪋㪇

㪞㪈㪅㩷㪇㪧㩷㩷㪏

㪌㪇

㪈㪊㪇

㪈㪋㪇

㪈㪌㪇

㪈㪎°㪫

㩿㪉㪈°㪀

㪍㪇

㪈㪉㪇

㪎㪇

㪏㪇

㪜

㪈㪇㪇

㪈㪈㪇

⦁㚂ᣇ૏ 321㫦

㪟㪜㪘㪛㪠㪥㪞㩷㩷㩷㩷㩷㩷㩷㩷

㊎〝 335㫦

㪪㪟㪠㪧㩷㪚㪦㪬㪩㪪㪜㩷㩷㩷㩷㩷㩷㩷㩷

⦁ㅦ 12.5kt

⥄⦁૏⟎[DGPS] (000.000)

㪣㪘㪫㪆㪣㪦㪥㪞㪲㪛㪞㪧㪪㪴

NUMERIC

᳓㩷㩷㩷㩷󰵴 321m

㪛㪜㪧㪫㪟

ầ㩷㩷㩷㩷ᵹ

㪮㪘㪫㪜㪩㩷㪚㪬㪩㪩㪜㪥㪫

DISPLAY

C1 1.2kt 342°

㪚㪈㪈㪅㪉㫂㫋㪊㪋㪉

C2 0.8kt 298°

C2 0.8kt 298

C3 0.4kt 256°

C3 0.4kt 256

✂㩷󰵴㩷ᐲ

NET DEPTH

S1 134m

S2 178m

S3 213m

NET DEPTH

䊍䉴䊃䉫䊤䊛

S1 䇭178m

㪈㪪㪺㪸㫅

S2 䇭134m

32°52.150N

㩷㩷㪊㪉°㪌㪉㪅㪈㪌㪇㪥

132°12.150E

㪈㪊㪉

㪊㪉㪈㫄

DATA

㪈㪉㪅㪈㪌㪇㪜

㪊㪉㪈㪊㪊㪌

S3 䇭150m

WATER CURRENT*

᳓㩷㩷㩷󰶘

10.3°C

C1 1.2kt 342° C2 0.8kt 298°

㪈㪉

C3 0.4kt 㪉㪌㪍°

㪥㪜㪫㩷㪛㪜㪧㪫㪟㪁

㪈㪇

㪪㪈㪈㪊㪋㫄㪪㪉㪈㪎㪏㫄

㪏

㪪㪊㪉㪈㪊㫄

Net

depth

㪇㪈㪇㪉㪇㫄㫀㫅

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2. HORIZONTAL MODE

2.21 Menu Items Descriptions

This section presents an overview of the horizontal display related menus not previously described.

Gain Setting menu

Gain Control: If the amount of gain change affected with the GAIN control on the front

panel is too low, change the setting to [Wide], to double the range of the control.

Display Setting menu

Gain Offset: Adjusts gain level. If the GAIN control on the front panel does not provide

satisfactory gain adjustment, enter an offset here. The setting range is 0-12.

Signal Level: Contaminated water or reflections from plankton may be painted on the screen in green or light-blue. These echoes may be erased in order of strength. The setting range is 0-15; 0 corresponds to the weakest color.

Color: Selects color arrangement to use. The default setting is Color 1 to 4.

H-Scan Color1 (or 2 to 4) Setting: Customizes colors. See the procedure on the next

page.

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2. HORIZONTAL MODE

1. Operate the trackball to select color then push the left-click button to show the color bar.

Select color with trackball.

COL: Cycles through default colors. HUE: Adjusts color tint (Setting range: 0-100(%)). SAT (Saturation): Adjusts color vividness (Setting range: 0-100(%)). LUM (Luminescence): Adjusts color brightness (Setting range: 0-100(%)).

2. Select S or T for COL, HUE, SAT or LUM.

3. Push the left-click button several times to set.

4. Repeat steps 2 and 3 to complete other items.

5. Select [Quit] then push the left-click button.

6. Repeat steps 1 through 5 to set other colors.

7. Select [Apply] then push the left-click button.

Note: To restore default color setting, select [Default] on the window then push the left-click button.

H-Scan Color Curve Setting: Adjusts reflected echo strength versus echo color level for currently selected color response number. To adjust the curve, place the trackball at the point desired then push the left-click button. On the horizontal axis input level relative value is shown in the range from 0 to 100%. The setting range for input level is 0-100% in increments of 10% and output level is 0-100% in any value. Select [Apply] then push the left-click button.

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2. HORIZONTAL MODE

To set input level versus output level, use the trackball to place the cursor on location desired and push the left-click button.

Note: To restore default color response, select [Default] on the window then push the left-click button.

Picture Setting menu

Smooth Echo RNG: Selects echo smoothing level in the range direction. The setting

range is 0-7. The higher the setting, the greater the smoothing.

Smooth Echo CIR: Selects echo smoothing level in the circular direction. The setting range is 0-5. The higher the setting, the greater the smoothing.

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2. HORIZONTAL MODE

2.22 How to Interpret the Horizontal Display

2.22.1 Bottom and school of fish echoes

Bottom echoes

When the tilt angle is changed, the bottom echo illustrated below will appear on the display. When the tilt is decreased (toward 0°), the bottom trace becomes wider and weaker. By observing the bottom condition on the display, 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.

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2. HORIZONTAL MODE

School of fish

A school of fish appear as a mass of echoes on the screen. By this display pattern, the density of the school on the sonar beam can be found. To find distribution and center point of a school of fish, try several different tilt angles.

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

School of fish

Sea surface reflections

(B) Midwater, bottom fish Tilt angle: 30° or more Fish echo which appears before bottom can be detected.

Bottom echo not displayed because of decreased tilt angle. Sea surface reflections are present.

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

Bottom

School of fish

Large midwater fish school is present.

School of fish

Bottom

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

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2.22.2 Unnecessary echoes

Sea surface reflections

To reduce sea surface reflections, set the tilt angle to 4° or higher, so the upper edge of the sonar beam does not hit the sea surface, or adjust TVG. When a decreased tilt is used, sea surface reflections cover a large area as illustrated below.

2. HORIZONTAL MODE

Tilt: 0

Tilt: 4°-5

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

Other ship

Own ship

Own ship's screw noise

Wake produced by other ship

Own ship's screw noise

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

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2. HORIZONTAL MODE

Sidelobe echoes (false echoes

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

Sidelobe echo

Mainlobe

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.

Noise and interference

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

For instance, interference from the sonar operated on other boats will show itself on the display as in (A) in the figure below. This interference can be suppressed by changing the TX interval, with [TX Interval] on the [H-Scan Setting] menu. Noise from marine life shows itself on the displays as in (B) in the figure below. This type of noise can be suppressed with the interference rejector on the [Picture Setting] menu.

2-44

School of fish

Bottom

Ring of interference

(A) Interference from other sonar (yours or others)

(B) Interference from marine life

Page 71

3. VERTICAL MODE

3.1 Basic Operating Procedure

Lower transducer.

: Mid protrusion 䋺Full protrusion

Press appropriate key.

Turn on power.

Set vertical bearing mark

to display in vertical display.

MENU/

ESC

䌆1

AUTO

䌆2

TILT

USER PROG

䌆3

DISP

MODE

SHOOT

䌆4

GAIN

䌆5

V1/S V2

AUTO

CENTER

TRAIN

R/B

DELETE

AUDIO

MARK

H/V/S

䌆7

䌆6

Press to choose the screen (horizontal or vertical)

OFF

RANGE

䌆8

Select range.

EVENT

ESTIMATE

TARG ET LOCK

䌆9

to adjust gain and range.

Adjust gain.

EVENT

ESTI-

MATE

FISH

䌆10

Select a vertical display.

Control panel

3-1

Page 72

3. VERTICAL MODE

3.2 How the Vertical Mode Works

3.2.1 Overview

The vertical mode shows a vertical section of the horizontal display selected with the vertical bearing mark. The figure below illustrates the concept of the vertical mode, in comparison with the horizontal mode. The vertical mode helps you keep fast moving fish such as bonito and tuna within the sonar beam.

Horizontal Mode Vertical Mode

Detection aspect, view from top

Detection aspect, view from side

3.2.2 How to set the vertical display

1. Use the trackball to place the cursor at the desired location in the horizontal display.

2. Press the V1/S or V2 key.

For example, press the V1/S key. Then, the Vertical 1 display appears, and the vertical bearing marker is displayed in the horizontal display, with V at the tip of the marker as shown on page 3-3. If both vertical displays are activated 1 or 2 is inscribed at the tip of a vertical bearing marker.

Note: The TILT control functions as a bearing setting lever for the vertical display1 in the conditions mentioned below. The bearing of the vertical display1 changes clockwise when the TILT control is pressed upward and counterclockwise when pressed downward, changing in increments of two degrees.

• The item [Tilt Lever] in the [Display Setting] menu is set to [TILT & V1].

• The vertical screen is chosen in the vertical mode.

3-2

Page 73

3.3 Vertical Indications and Marks

3.3.1 Typical vertical display

The vertical mode provides a vertical section of the horizontal picture. You may show the display on the right or left side of the screen in case of the vertical 1 mode. An expansion mode is available to enlarge the picture. To display the vertical mode, press the DISP MODE key and choose V1 or V1 & V2.The example below shows the V1 mode. You can move and change the window size of the vertical display 1 by drag and drop.

Trackball data Slant range Horizontal range Vertical range Angle to cursor from horizontal

Cursor position reference mark

1547m 1473m 473m

A 33°

㪊㪈㪇

㪊㪇㪇

㪉㪐㪇

㪉㪏㪇

㪉㪍㪇

500

V 12°

R 2000m G 8.0 P 1

㪊㪋㪇

㪊㪊㪇

㪊㪉㪇

1000 1500

㪊㪌㪇

㪈㪇

㪉㪇

500

2000

1000

㪈㪎㪇

㪊㪇

㪈㪌㪇

㪈㪍㪇

3. VERTICAL MODE

Vertical bearing mark

㪋㪇

㪌㪇

㪍㪇

㪎㪇

NUMERIC/

㪏㪇

GRAPHIC

DATA

DISPLAY

㪈㪇㪇

㪈㪈㪇

㪈㪉㪇

㪈㪊㪇

㪈㪋㪇

Range scale

VERTICAL DISPLAY DATA (from left to right) Vertical Bearing (V) Range (R) Gain (G) User program number (P)*

Vertical display 1

R 2000m G8 V 256°

V 12°

500 1000

500

1000

R 2000m G 8.0

*: Shown when the [Sel User Prog]

is set to [H/V Individual] on the [Register] menu.

Tilt angle mark (Detection aspect in vertical direction at horizontal display)

Target lock mark (Entered on horizontal display.)

1500

500

1000

P 1

Trackball mark (+ cursor)

3-3

Page 74

3. VERTICAL MODE

Note: When the settings listed below are changed, the setting value is shown at the top of the display for five seconds. The location of the setting value can be changed. Contact your dealer for details.

• Gain (See section 1.6.)

• Vertical bearing (See paragraph 3.2.2.)

• User program (See section 6.3.)

3.3.2 Vertical bearing mark, tilt mark

The vertical bearing mark is displayed with solid and dashed lines and it shows the bearing selected on the horizontal display. The circle at the top of the vertical bearing mark has a V inside of it in the vertical 1 mode, or 1 and 2 as appropriate when both the vertical 1 and vertical 2 modes are active. Its bearing may be referenced to North (true) or ship’s heading (relative, default setting) on the menu. (See page 7-4.)

The tilt mark is a solid and dashed line which shows in the vertical display the tilt angle set on the horizontal display.

The meaning of the solid and dashed lines are as shown in the table below.

Solid line Dash

Vertical bearing mark Range from own ship to

vertical scan range

Tilt mark Range from own ship to

horizontal scan range

• Display range (See section 3.5.)

• Auto train (See section 3.4.)

Range further than vertical scan range

Range further than horizontal scan range

V = Vertical 1 1, 2 = Vertical 1, Vertical 2

Vertical bearing mark

Tilt angle

Vertical scan range Horizontal scan range

HR = Horizontal Range VR = Vertical Range

Tilt mark

3-4

Page 75

3.3.3 Cursor position reference mark

The cursor position reference mark, a solid circle, is inscribed on the vertical bearing mark when the cursor is placed in the vertical display. Its purpose is to show corresponding cursor position on the horizontal display. It changes position with cursor position, tilt and range, and disappears when its position is no longer within the range of the horizontal display.

Vertical bearing

Cursor position reference mark

mark

3. VERTICAL MODE

VERTICAL DISPLAY

Tilt mark

Cursor

3.4 Auto Train

You may scan the vertical bearing mark in the sector of ±12°, ±24° and ±36°. Press and hold down the AUTO TRAIN key while pressing the V1/S or V2 key to select the auto train sector desired. Selected sector appears in large characters for five seconds for your confirmation. To cancel auto train, repeat the above procedure to select [OFF].

3.5 Display Range

Auto train mark

Auto train

sector

Vertical bearing mark

The RANGE control selects the detection range. The range selected is momentarily displayed in large characters at the top of the vertical 1 display. Range is always displayed next to “R“ at the lower part of the vertical 1 display.

The default ranges are as shown below. In the vertical 2 combination display, the range for V1 and V2 are same.

Range No. 1 23456

Detection range 100 200 400 600 800 1000

Note: Ranges can be preset. See page 7-6 for details.

3-5

Page 76

3. VERTICAL MODE

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

㪊㪋°㪌㪍㪅㪎㪏㪐㪥

1. Press the H/V/S key to show the range and gain indications of the horizontal mode to change the range (and gain).

2. Operate the RANGE control to select a range.

Note: The range can also be adjusted from the range indication. Put the cursor on the range indication to highlight it in yellow then roll the scrollwheel.

3.6 How to Measure the Range, Bearing to a Target

Operate the trackball to place the cursor on the vertical 1 (or vertical 2) display. The range to the location selected is shown at the top left corner.

Cursor data Slant range Horizontal range Vertical range

ngle to cursor

from horizontal

1547m 1473m 473m

33°

㪊㪈㪇

㪊㪇㪇

㪉㪐㪇

㪉㪏㪇

㪉㪍㪇

500

V 12°

R 2000m G 8.0 P 1

㪊㪊㪇

㪊㪉㪇

1000 1500

㪊㪋㪇

㪊㪌㪇

500

2000

1000

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

㪈㪇

㪊㪋°㪌㪍㪅㪎㪏㪐㪥

㪈㪎㪇

㪉㪇

㪈㪍㪇

Cursor

Note: To show the cursor position in L/L, see page 7-12.

㪊㪇

㪋㪇

㪌㪇

㪍㪇

㪎㪇

NUMERIC/

㪏㪇

GRAPHIC

DATA

DISPLAY

㪈㪇㪇

㪈㪈㪇

㪈㪉㪇

㪈㪊㪇

㪈㪋㪇

㪈㪌㪇

Cursor position

3.7 How to Eliminate Weak Echoes

3-6

TVG curve 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 the similar intensities irrespective of the ranges to them.

TVG curve

Four TVG curves are available and they vary the gain from large to small.

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

Page 77

3. Press the H/V/S key to select [V] tab.

4. Select [Sel. TVG Curve] then push the left-click button.

3. VERTICAL MODE

5. Select a curve then push the left-click button. The smaller the number the gentler the gain change over distance.

6. Select [Quit] on the setting box then push the left-click button.

7. Long-press the MENU/ESC key to close all menus. The TVG is also used to suppress unwanted echoes (sea surface reflections, cruising noise, etc.) on near ranges. If the selected curve does not provide satisfactory results, try to adjust TVG-Near, TVG-Medium or TVG-Far, as shown below.

TVG distance and setting

This sonar has three TVG functions, Near, Medium and Far, and they mainly compensate for propagation loss on short, middle and long ranges respectively, centered at the ranges shown below. The higher the TVG setting the greater the amplification of echoes.

Near

Approx. 100 m

Med

Approx. 400 m

Far

Approx. 800 m

3-7

Page 78

3. VERTICAL MODE

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [TVG Distance] then push the left-click button.

5. Select [Changeable] then push the left-click button.

rrent settings

6. Select S or T; for [Near], [Med] or [Far] as appropriate then push the left-click

button to change the setting. Near: Setting range, 50 - 150 m, 10 m increments. Med: Setting range, 300 - 500 m, 20 m increments Far: Setting range, 600 - 1000 m, 40 m increments

Select item with trackball; push left-click button to adju

7. Select [Quit] on the setting box then push the left-click button. Adjust the TVG level for selected TVG distance as below.

8. Select [TVG-Near], [TVG-Med] or [TVG-Far] as appropriate then push the leftclick button.

9. Select S or T as appropriate then push the left-click button to change the setting. The setting range is -5 to 5. The higher the setting, the higher the gain. For strong echoes such as sea surface reflections or plankton layer lower the setting by 1 or

10. Select [Quit] on the setting box then push the left-click button to close the box.

11. Long-press the MENU/ESC key to close all menus.

3-8

Page 79

3.8 How to Adjust Strong, Weak Echoes

3.8.1 AGC

The AGC functions to automatically reduce the receiver gain only against strong echoes such as the bottom or a large school of fish. Since weak echoes remain unaffected, a small school of fish becomes easier to detect. Adjust it so that the AGC works only on bottom reflections. Do not set it too high; weak echoes may be missed.

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [AGC] then push the left-click button.

5. Select S or T then push the left-click button to change the setting.

The setting range is -20 to 20. The higher the setting, the higher the degree of suppresion.

6. Select [Quit] on the setting box then push the left-click to close the box.

3. VERTICAL MODE

7. Long-press the MENU/ESC key to close all menus.

3.8.2 Near AGC

When the water is shallow or heavily sedimented, the reflected echoes from close-in, unwanted echoes may be excessively strong. In this case, a school of fish which is displayed at between 300 and 500 m may disappear gradually when the ship starts approaching the school of fish.

Use the Near AGC feature to suppress this strong echo. Normally set it between 3 and 4, however, this setting depends on the sea area. Do not set it too high; all echoes (including noise) from near distance may be painted in red.

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [Near AGC] then push the left-click button to show the setting dialog box.

5. Select [Near AGC] again then push the leftclick button.

6. Select S or T then left-click to change the setting. The setting range is -20 to 20. The higher the setting, the stronger the echo level on near range.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Note: Set the effective range of [Near AGC] with [Near AGC Distance]. The setting range is 20 - 2000 m, in 20 m increments. The settin range can be changed in the system menu. For details, contact your dealer.

3-9

Page 80

3. VERTICAL MODE

3.8.3 2nd AGC

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [2nd AGC] then left-click to show the setting box.

5. Select [2nd AGC] again then push the leftclick button.

6. Select S or T then push the left-click button to change the setting. The setting range is 0 to 20. The higher the setting, the stronger the suppression on long range.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Other AGC-related items on the [2ND AGC] menu

Distance: Set the start range for the 2nd AGC. The setting range is 0 - 2000 m, in 20

m increments. 2nd AGC is inoperative if the display range is lower than the 2nd AGC start range.

Type: Select the TVG type for 2nd AGC. Select [Small] for everyday use.

3.8.4 How to shorten pulse length

Note: For search of surface and midwater fish in which bottom reflections are not so strong, use the longest pulse length 9.

3-10

1. Press the MENU/ESC key to show the main menu.

Page 81

3. VERTICAL MODE

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [TX Pulse Length] then push the left-click button.

5. Select S or T then push the left-click button to change the setting. The setting

range is 0-9. The higher the setting, the longer the pulse length.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

3.9 How to Reject Sonar Interference and Noise

3.9.1 How to identify the noise source

To eliminate noise effectively, you should first identify the noise source as follows:

2. Run the boat at various speeds to check if the noise is speed dependent.

If neither of the above two steps has effect on the picture, adjust one of the following:

3-11

Page 82

3. VERTICAL MODE

3.9.2 Interference rejector

1. Press the MENU/ESC key to show the main menu.

2. Select [Picture Setting] then push the leftclick button.

3. Press the H/V/S key to select the [V] tab.

4. Select [Int Reject] then push the left-click button.

5. Select S or T then push the left-click button to change the setting The setting range is 0-

3. The higher the setting, the greater the degree of interference rejection.

6. Select [Quit] on the setting box to close the box.

7. Long-press the MENU/ESC key to close all menus.

3.9.3 Shift TX frequency

If the interference cannot be suppressed by the interference rejector or change in TX interval, shift the Tx frequency with the [Frequency] menu.

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [Frequency] then push the left-click button.

5. Select [Freq Shift1] then push the left-click button.

6. Select S or T then push the left-click button to change the setting. The setting range is -80 to 80 (for 70 kHz) or -65 to 65 (for 80 kHz).

3-12

7. Select [Quit] on the setting box then push the left-click button.

8. Long-press the MENU/ESC key to close all menus.

Note 1: In some cases the frequency cannot be changed because of operating bandwidth. In this case the frequency setting is grayed.

Note 2: The setting for [Freq Shift2] is valid when [Sidelobe Sup. A] (see page 3-12) is set between -3 and -1. Set [Freq Shift1] well apart from [Freq Shift2] to better suppress sidelobes.

Page 83

3.9.4 Noise limiter

1. Press the MENU/ESC key to show the main menu.

2. Select [Display Setting] then push the left-click button.

3. Press the H/S/V key to select the [V] tab.

3. VERTICAL MODE

4. Select [Noise Limiter] then push the left-click button.

5. Select S or T then push the left-click button to set the value (setting range: 0 to

15).

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

3-13

Page 84

3. VERTICAL MODE

3.9.5 Reverberation

You may choose the length of reverberation for the echo signal, with [Reverberation] in the [TX/RX Setting] menu on the [V] tab. The larger the value, the lower the reverberation effect, which makes it easier to see the echo signal. The setting range is 0-3.

3.9.6 Echo average

[Echo Average] on the [Picture Setting] menu in the [V] tab adjusts echo afterglow the amount of time an echo signal remains on the screen. This feature can be useful for watching echo movement. The setting range is 0-7. Setting between 1 and 3: Echoes are gradually displayed and afterglow remains on the screen longer as the setting is increased.Setting between 4 and 7: Echoes are quickly displayed and afterglow remains on the screen longer as the setting is increased.

3.9.7 How to suppress sidelobes

Note: When a negative value is used, [TX/RX Mode] in the [Display Setting] menu is automatically selected to [Alternative]. See page 7-3 for details.

For greater sidelobe suppression, use [Sidelobe Sup. B]. Note that You cannot operate [Sidelobe Direction 1] and [Sidelobe Direction 2].

3-14

Page 85

3.10 How to Adjust Beam Width

The width of the horizontal beam can be adjusted from the [Beam Width] menu.

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [V] tab.

4. Select [Beam Width] then push the left-click button.

5. Select the item to set then push the left-click button.

3. VERTICAL MODE

Description of Beam Width menu

Beam Control: Control the beamwidth according to option selected. Manual: Se-

lect this item to enable adjustment of the other items in this menu. Range: The beamwidth is automatically controlled with the range setting.

guish fish echoes from bottom echoes.

RX Beam Control: Increase the value to improve horizontal resolution.

Note: When [RX Beam Control] is set to 1 - 3 and [Sidelobe Sup.B ] is set to other

than 0, [TX/RX Mode] on the [Display Setting] menu is automatically selected to [Alternative]. See "TX/RX Mode" on page 7-3 for details.

*: Available only when [Beam Control] is set to [Manual].

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

3-15

Page 86

3. VERTICAL MODE

3.11 Other Menu Items

This section describes menu items which have not been explained yet.

Gain Setting menu

Gain Control: If the amount of gain change affected with the GAIN control on the front

panel is too low, change the setting to [Wide], to double the range of the control.

Display Setting menu

3-16

Gain Offset: Adjusts gain level. If the GAIN control on the front panel does not provide

satisfactory gain adjustment, enter an offset here. The setting range is 0-12.

Color: Select color arrangement to use. The default setting is Color 1.

Page 87

3. VERTICAL MODE

V-Scan Color 1 (2 to 4) Setting: Customizes colors. For details, see page 2-38.

V-Scan Color Curve Setting: Adjusts reflected echo strength versus echo color level

for currently selected color response number. To adjust the curve, see page 2-38.

Picture Setting menu

Smooth Echo RNG: Selects echo smoothing level in the range direction. The setting

range is 0-7. The higher the setting, the greater the smoothing.

Smooth Echo CIR: Selects echo smoothing level in the circular direction. The setting range is 0-5. The higher the setting, the greater the smoothing.

3.12 Application to Bonito and Tuna Fishing

Tracking of bonito and tuna presents a special challenge to the sonar operator: He must try to keep them within the sonar beam, a formidable task considering their high speed and penchant for leaping and diving. However, the vertical display, with its wide range in the vertical direction, makes this task easier.

3.12.1 Searching

Neither the naked eye nor binoculars can continually track schools of fish which make lightning quick runs between the surface and midwater. A sonar, however, provides a continuous view of several hundred meters of sea area around the boat, both at the surface and below it.

3.12.2 Tracking

If you are visually tracking a school of fish which characteristically leaps and dives regularly, or a school with a flock of birds hovering over it, the school will scatter once the vessel approaches, thus you will lose sight of the school. This sonar provides continuous pictures of underwater conditions, so you can always know where a school of fish is. For tracking the schools which leap and dive often the vertical mode is especially effective.

3-17

Page 88

3. VERTICAL MODE

3.12.3 Approaching

The sonar lets you view the movement of a school of fish continuously, thus you can approach a school confident of a good catch.

While a flock of birds hovering over the sea surface is usually a good indication of the presence of a school of fish, the sonar can better verify the size of a school of fish.

3.12.4 Catching

While the sonar operator monitors the sonar for other schools of fish, the crew can scatter bait and water to attract fish to the boat.

3-18

Page 89

4. SLANT MODE

4.1 Basic Operating Procedure

Lower transducer.

: Mid protrusion

: Full protrusion

Turn on power.

Push applicable key. (For setting train angle.) V1: Left, V2: Right

MENU/

ESC

䌆1

AUTO

TILT

䌆2

V1/S

AUTO TRAIN

R/B

AUDIO

H/V/S

䌆6

USER PROG

MODE

䌆3

DISP

䌆4

SHOOT

GAIN

䌆5

for range and gain adjustment.

Adjust gain.

Select single "S" mode

or combination "S" mode.

OFF

CENTER

DELETE

MARK

RANGE

䌆7

䌆8

EVENT

ESTIMATE

TAR GET LOCK

䌆9

EVENT

ESTI-

MATE

Select range.

FISH

䌆10

Adjust tilt.

Select mode (horizontal/vertical, H1/H2)

4-1

Page 90

4. SLANT MODE

4.2 Indications and Marks

The picture produced by the slant mode is the same as that of the half-circle sonar picture. The slant mode provides a half-circle (180°) picture, with own ship at the center

4.2.1 Slant mode, full-screen display

To select the full-screen slant mode display, press the MODE key and select [S]. (To use the slant mode, presetting of the mode is required. MENU/ESC key - [Others] menu - [Register] - [Display Mode] - [S].)

Net shoot data Distance run from shooting Time from shooting

Trackball data

- Slant range

- Horizontal range

- Depth

- Relative bearing or True bearing*

Wind speed, direction*

Latest event mark

Auto train mark

Audio bearing mark

Heading mark

North mark*

Own ship mark

Current mark*

Range ring

Bearing scale

Event mark

Event mark data

- Horizontal range

- Present depth

- Depth at measured

- Relative bearing or True bearing*

Requires appropriate sensor.

Shown with head-up mode.

**:

The Slant mode presents a half-circle picture. The data display is mostly the same as the horizontal mode

***:

except the train angle is shown. Appropriate sensors are required to display navigation data.

㪙㩷㩷㪈㪈㪌°

㪮㪈㪉㫄㪆㫊

㪉㪐㪇

㪉㪏㪇

㪮

㪉㪍㪇

㪉㪌㪇

㪈㪋㪏㫄

㩷㩷㪋㪏㫄㩷㩷㩿㪉㪈㪇㫄㪀㪙㪊㪊㪇°

㪈㪋㪏㫄㪈㪋㪉㫄

㪋㪌㫄

㪊㪈㪇

㪊㪇㪇

㪉㪋㪇

㪉㪊㪇

㪙㪊㪋㪇°

Cursor position

Target lock mark

Fish track*

㪇㪅㪌㪈㪥㪤㪌㪑㪊㪉

㪊㪊㪇

㪊㪉㪇

㪉㪉㪇

㪈㪍㪏㫄

㩷㩷㪋㪏㫄

㪉㪈㪇

㩷㩷㩿㪉㪈㪇㫄㪀

Bearing*,**

㪊㪌㪇

㪊㪋㪇

㪉

㪊

㪈

㪉

Range ring data

㪊㪋°㪌㪍㪅㪎㪏㪐㪥

㪈㪐㪇

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

Fish mark

㪥

㪈

㪈㪌㪇

㪪

Line connecting fish marks

Latest fish mark

㪈㪇

㪉㪇

㪈

䊶

䊶䊶

䊶

䊶䊶䊶

䊶

㪏㪌

㪈㪍㪇

㪈㪎㪇

㪟㪄㪬㪧

㪪㩷㪩㪋㪇㪇㫄

㪘㪬㪫㪦

㪊㪇

㪋㪇

㪩㪦㪌㪇㪪

㪞㪈㪅㩷㪇㪧㩷㩷㪏

㪌㪇

㪈㪉㪇

㪈㪊㪇

㪈㪋㪇

㪈㪌㪇

㪩㪈㪋㪍㫄㪙㪉㪐㪇°

㪉㪊㪇㫄

㪪㪈㪉㪅㪊㫂㫅㪚㪉㪌㪍°

Range mark and audio bearing mark data

Presentation mode

Display mode

Scan data Range Tilt

㪈㪎°㪫

(Current auto tilt)

㩿㪉㪈°㪀

Train angle*** Gain User program no.

Train angle marker

㪍㪇

Fish movement vector

㪎㪇

Fish estimate mark no. Fish estimate mark

㪏㪇

Fish estimate mark data

㪜

Range mark

㪈㪇㪇

Cursor

㪈㪈㪇

Target lock/fish movement data

㪎㪇㫄

Horizontal range

Depth

Speed

Course*

4-2

Page 91

4.2.2 Slant mode, combination display

The slant mode combination display provides the slant and horizontal pictures. The pictures can be arranged in landscape, portrait and inset. The zoom-out display shown on the inset display can be moved or changed the size with the drug and drop operation.

To select desired combination display do the following:

1. Press the MENU/ESC key to show the main menu.

2. Select [Others] then push the left-click button.

3. Select [DIsplay Setting] then push the left-click button.

4. SLANT MODE

4. Select [H2/S Display] then push the left-click button.

5. Select the item desired then push the left-click button.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

4-3

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4. SLANT MODE

4.3 Display Range

Range No. 1 2 3 4 5 6

Detection range 100 200 400 600 800 1000

Note: Ranges can be preset on the [Register] menu. See page 7-6.

1. Press the H/V/S key to select the slant mode. Range and user program no. are shown in orange.

2. Operate the RANGE control to select a range.

Note 1: The range can also be adjusted from the range indication. Put the cursor on the range indication to highlight it in yellow then roll the scrollwheel.

Note 2: In the target lock function, the range is automatically changed according to target position if [Tilt Interlock] ([Target Lock] menu) is selected to [Tilt & Range].

Bottom

Range displayed on display

Surface

4.4 Tilt Angle

The tilt angle shows the direction to which the sound wave is emitted. When the sound wave is emitted horizontally, the tilt angle is said to be 0° and when vertically, 90°. The tilt angle can be set between -5° (upward) to 90° (downward), in increments of 1°. For further details, see section 2.4.4 and section 2.4.5.

4.4.1 How to set the tilt angle

To manually set a tilt angle, operate the TILT control. Watch the tilt angle indication and tilt angle indicator is momentarily displayed in large characters at the top of the screen. The tilt angle is always displayed next to “T“ at the top right hand corner of the screen.

Select tilt angle depending on target fish. For surface fish select a shallow angle (about 5°) and for bottom fish, a deep angle.

-5-degree

0-degree horizontal direction

Transducer

(tilt angle 0-degree)

Tilt angle setting range

Tilt angle

4-4

+90-degree

Note 1: The default function of the scrollwheel sets the tilt angle.

Note 2: The tilt angle can also be adjusted from the tilt angle indication. Put the cursor

on the tilt angle indication to highlight it in yellow then roll the scrollwheel.

Page 93

4.4.2 Automatic tilt

1. Press the AUTO TILT key to select auto tilt angle desired. Each time the key is pressed the auto tilt angle changes in the following sequence.

4. SLANT MODE

OFF  [±1° - 4°]

OFF



[±2° - 10°]

[±2° - 6°]

[±4° - 16°]

[±3° - 8°

[±6° - 20°

]

(Narrow)

]

(Wide)

2. If necessary operate the TILT control to change center tilt angle.

Automatic tilt angle (narrow) with

Range (m) Width 1 Width2 Width3 Period

60, 100 150, 200 300, 400 500, 600 700, 800 900, 1000 Over 1100

±4° * ±2° ±1° ±1° ±1° ±1° ±1°

±6° *; ±4° * ±2° ±2° ±2° ±2° ±2°

±8° * ±6° * ±4° * ±3° ±3° ±3° ±3°

AUTO TILT key

Period: One transmission Note: Tilt angle changes in 2° increments for asterisk-marked width; 1° increments for all other widths.

Automatic tilt angle (wide) with AUTO TILT key

Range (m) Width 1 Width2 Width3 Period

60, 100, 150 200 300, 400 500, 600 700, 800 900, 1000 Over 1100

±10° ±10° ±10° ±8° ±6° ±4° ±2°

±16° ±16° ±16° ±16° ±12° ±8° ±4°

±20° ±20° ±20° ±20° ±16° ±12° ±6°

Period: One transmission

3. Auto tilt begins, with the tilt angle set with the TILT control as the center tilt angle.

Set tilt angle

Note 1: The AUTO TILT key is inoperative when the target lock function is active or is made active. Auto tilt is resumed once target lock is disabled.

Note 2: If the picture set with auto tilt is not visible, disable auto tilt and try again.

4-5

Page 94

4. SLANT MODE

4.5 Auto Train

This feature provide automatic training of the Tx and Rx beams in left and right directions to enable

Bow

search over a wide area. This feature is inoperative when target lock is active.

1. Press the V1/S or V2 key to set center angle

Train angle

Train cente angle

for automatic training. Each press of those keys displays center angle for automatic training at the center of the screen. Operate V1/S to change training rightward; V2 to change training leftward.

2. While pressing the AUTO TRAIN key press the V1/S key to set train angle. The choices are ±30°, ±60°, ±90°, ±120° and OFF.

Auto train is automatically cancelled when target lock is activated, and the train angle is set where the target lock mark is entered. When target lock is disabled, auto train resumes from the bearing in use at the time of deactivation of target lock.

4.6 How to Measure Range and Bearing to a Target

Operate the trackball to place the cursor on the target you want to measure the range and bearing. The range, bearing and depth to the target appear at the upper left corner of the screen.

Note 1: Cursor position may also be shown in latitude and longitude. For further details, see page 7-12.

Note 2: The bearing display is available in four formats. See page 7-12.



TRACKBALL DATA



Slant range



Horizontal range



Depth B Relative or True bearing

Cursor L/L position

 

㪙

㩷㩷㩷㩷㪊㪋°㪌㪍㪅㪎㪏㪐㪥

㪈㪉㪊°㪋㪌㪅㪍㪎㪏㪜

Cursor

Heading line

Own ship mark

4-6

Page 95

4.7 How to Eliminate Weak Echoes

Echoes from targets such as bottom and fish return to the transducer in order of distance to them, and when we compare their intensities at the transducer face, those from nearer targets are generally stronger due to little propagation attenuation and little absorption. If these echoes are displayed directly on the screen, the size of the displayed echo from the same school of fish may change with distance, making it difficult to judge the actual size of the school of fish. To overcome this inconvenience use the TVG curve 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 the similar intensities irrespective of the ranges to them.

TVG curve

Four TVG curves are available and they vary the gain from large to small.

1. Press the MENU/ESC key to open the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [S] tab.

4. SLANT MODE

4. Select [Sel. TVG Curve] then push the left-click button.

5. Select a curve then push the left-click button. The smaller the number, the gentler the gain change over distance.

6. Select [Quit] on the setting window then push the left-click button to close the box.

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Page 96

4. SLANT MODE

TVG distance and setting

Near

Approx. 50 m

Med

Approx. 300 m

Far

Approx. 680 m

4.8 How to Adjust Strong, Weak Echoes

4.8.1 AGC

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [S] tab.

4. Select [AGC] then push the left-click button.

5. Select S or T then push the left-click button to change the setting.

The setting range is -20 to 20. The higher the setting, the higher the degree of suppresion.

4-8

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

Page 97

4.8.2 Near AGC

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [S] tab.

4. Select [Near AGC] then push the left-click button.

4. SLANT MODE

5. Select [Near AGC] again then push the left-click button.

6. Select S or T then push the left-click button to change the setting. The setting range is -20 to 20. The higher the setting, the stronger the echo level on near range.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

Note: The effective range is set at [Near AGC Distance] on the [Near AGC] menu (20 m to 2000 m, 20 m step).

4.8.3 2nd AGC

While it is ideal to suppress bottom echoes with the AGC alone there are some fishing grounds where this is not possible. (The high power sonar has the advantage of longrange detection but this can also be a disadvantage, since weaker echoes may be hidden in strong, unwanted echoes such as the bottom.) If you can not suppress bottom echoes or sea surface reflections by the AGC function alone, use the 2ND AGC feature. Normally a setting of 1 or 2 is suitable. For especially strong echoes, use a setting of 3 or 4.

1. Press the MENU/ESC key to show the main menu.

2. Select [Gain Setting] then push the left-click button.

3. Press the H/V/S key to select the [S] tab.

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Page 98

4. SLANT MODE

4. Select [2nd AGC] then push the left-click button.

5. Select [2nd AGC] again then push the left-click button

6. Select S or T then push the left-click button to change the setting.

7. Select [Quit] on the setting box then push the left-click button to close the box.

8. Long-press the MENU/ESC key to close all menus.

The setting range is 0 to 20. The higher the setting, the stronger the suppression on long range.

Other AGC-related items on the [2nd AGC] menu

Distance: Set the start range for the [2nd AGC]. The setting range is 0 - 2000 m, in

20 m increments. [2nd AGC] is inoperative if the display range is lower than the [2nd AGC] start range.

Type: Select the TVG type for [2nd AGC]. Select [Normal] for everyday use.

Post2nd AGC-Near*: Set the near range threshold for [Post 2nd AGC]. The larger the

figure, the greater the suppression.

Post2nd AGC-Far*: Set the far range threshold for [Post 2nd AGC]. The larger the figure, the greater the suppression.

Post2nd AGC-Distance*: Switch between Far and Near Post 2nd AGC.

4.8.4 How to shorten pulse length

4-10

Note: For search of surface and midwater fish in which bottom reflections are not so

strong, use the longest pulse length [9].

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

Page 99

4. SLANT MODE

3. Press the H/V/S key to select the [S] tab.

4. Select [TX Pulse Length] then push the left-click button.

5. Select S or T then push the left-click button to adjust the setting. The setting range is 0-9. The higher the setting, the longer the pulse length.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

4.9 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters

In shallow fishing grounds with hard or rocky bottom, bottom reflections often interfere with wanted fish echoes and they can not be eliminated sufficiently with the aforementioned TVG and AGC functions, especially when the TILT is set to a larger angle in order to track schools of fish approaching within 400 m. In such cases try to reduce the output power by adjusting the Tx output instead of turning down the gain. The picture becomes clearer when output power is reduced rather than when the GAIN is decreased as illustrated below.

INCORRECT METHOD

CORRECT METHOD

Fish echo

TVG and AGC adjusted with TX POWER kept high

Fish echo weakened

Fish echo

Reduce TX POWER with GAIN kept constant

1. Press the MENU/ESC key to show the main menu.

2. Select [TX/RX Setting] then push the left-click button.

3. Press the H/V/S key to select the [S] tab.

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Page 100

4. SLANT MODE

4. Select [TX/RX Power] then push the left-click button.

5. Select S or T then push the left-click button to adjust the setting. The setting

range is 0-9. The higher the setting, the greater the TX power.

6. Select [Quit] on the setting box then push the left-click button to close the box.

7. Long-press the MENU/ESC key to close all menus.

4.10 How to Reject Sonar Interference and Noise

4.10.1 How to identify the noise source

To eliminate noise effectively, you should first identify the noise source as follows:

2. Run the boat at various speeds to check if the noise is speed dependent.

If neither of the above two steps has effect on the picture, adjust one of the following:

4-12

Furuno FSV85 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

IMPORTANT NOTICES

SAFETY INSTRUCTIONS

FOREWORD

SYSTEM CONFIGURATION

1. OPERATIONAL OVERVIEW

1.1 Control Description

1.1.1 Control unit

1.1.2 Sub control unit (option)

1.1.3 Remote controller (option)

1.2 Turning the Power On/Off

1.3.1 Lowering the transducer

1.3.2 Raising the transducer

1.4 Screen Brilliance, Panel Dimmer

1.4.1 Screen brilliance

1.4.2 Panel dimmer

1.5.1 How to select a display mode

1.5.2 Display mode pictures

1.6 How to Adjust the Gain

1.7 How to Use the Menu

2. HORIZONTAL MODE

2.1 Basic Operating Procedure

2.2 Indications and Markers

2.2.1 Horizontal mode, full-screen display

2.2.2 Horizontal2 mode

2.3 Display Range

2.4 Tilt Angle

2.4.1 How to set the tilt angle

2.4.2 Automatic tilt

2.4.3 Relation between bottom echo and tilt angle

2.4.4 Tilt angle for surface fish

2.4.5 Suitable tilt angle

2.5 How to Measure Range and Bearing to a Target

2.6 How to Eliminate Weak Echoes

2.7 How to Adjust Strong, Weak Echoes

2.7.1 AGC

2.7.2 Near AGC

2.7.3 2nd AGC

2.7.4 How to shorten pulse length

2.9 How to Reject Sonar Interference and Noise

2.9.1 How to identify the noise source

2.9.2 Change TX interval

2.9.3 Interference rejector

2.9.4 Shift TX frequency

2.9.5 Noise limiter

2.9.6 Reverberation

2.9.7 Echo average

2.9.8 Reference bearing in frequency shift

2.9.9 How to suppress sidelobes

2.10 How to Adjust Beam Width

2.11 How to Track a School of Fish

2.11.1 How to select the target lock mode

2.11.2 Fish mode

2.11.3 Target mark mode

2.11.4 Target lock menu description

2.12 Presentation Mode

2.12.1 Presentation mode description

2.12.2 How to select a presentation mode

2.13 How to Detect Schools of Fish Aurally

2.13.1 How to set the bearing

2.13.2 How to select the audio sector

2.13.3 Automatic training

2.13.4 Reverberation for audio signal

2.14 Fish Alarm

2.15 How to Relocate a School of Fish

2.16 How to Compare Concentration of School of Fish

2.16.1 How to compare with the fish estimate mark

2.16.2 How to compare with the circle cursor

2.17 How to Measure the Speed of a School of Fish

2.17.1 How to measure the speed of a school of fish

2.17.2 How to delete fish marks

2.18 Event Mark, Own Ship Position Mark

2.18.1 How to enter an event mark

2.18.2 How to enter an own ship position mark

2.18.3 How to erase an event mark, own ship position mark

2.19 Net Course Mark

2.20 Net Behavior