TABLE OF CONTENTS

3.

VERTICAL MODE

3-1

 

3.1

Basic Operating Procedure

3-1

 

3.2

Vertical Mode Concept

3-2

 

 

3.2.1

Overview

3-2

 

 

3.2.2

Setting the vertical display

3-2

 

3.3

Vertical Mode 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 Trackball mark position reference mark

3-5

 

3.4

Auto Train

3-5

 

3.5

Display Range

3-6

 

3.6

Measuring the Range

3-6

 

3.7

Eliminating Weak Echoes

3-7

 

3.8

Suppressing Bottom Tail

3-10

 

 

3.8.1

Adjust AGC

3-10

 

 

3.8.2

Decrease pulse length

3-10

 

 

3.8.3

Adjust 2nd AGC

3-11

 

 

3.8.4

Adjust Near AGC

3-11

 

3.9

Rejecting Interference and Noise

3-12

 

 

3.9.1

Identifying noise source

3-12

 

 

3.9.2

Interference rejector

3-12

 

 

3.9.3

Noise limiter

3-13

 

 

3.9.4

Shifting Tx frequency

3-13

 

 

3.9.5

Echo average

3-13

 

 

3.9.6

Reverberation reduction

3-13

 

 

3.9.7 Suppressing gain of bottom echo

3-14

 

 

3.9.8

Suppressing sidelobes

3-14

 

3.10

Adjusting Beamwidth

3-15

 

3.11

Vertical Expansion Display

3-16

 

3.12

OTHERS Menu

3-17

 

 

3.12.1 Displaying the OTHERS menu

3-17

 

 

3.12.2

OTHERS menu description

3-18

 

3.13

Application to Bonito and Tuna Fishing

3-21

 

 

3.13.1

Searching

3-21

 

 

3.13.2

Tracking

3-21

 

 

3.13.3

Approaching

3-21

 

 

3.13.4

Catching

3-22

4.

SLANT MODE

4-1

 

4.1

Basic Operating Procedure

4-1

 

4.2

Indications and Marks

4-2

 

 

4.2.1

Slant mode single display

4-2

 

 

4.2.2

Slant mode combination display

4-3

 

4.3

Display Range

4-7

 

4.4

Tilt Angle

4-8

 

 

4.4.1

Setting the tilt angle

4-8

 

 

4.4.2

Automatic tilt

4-9

 

4.5

Auto Training

4-11

vii

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Furuno FSV-84 manual Vii, Table of Contents