Furuno FSV-85 MARK-2 Operator's Manual page 8

TABLE OF CONTENTS
2.10 How to Adjust Beam Width ...................................................................................... 2-20
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........................................................................................ 2-22
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 ..................................................................... 2-25
2.13.1 How to set the bearing ................................................................................. 2-25
2.13.2 How to select the audio sector ..................................................................... 2-26
2.13.3 Automatic training ........................................................................................ 2-26
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....................................................... 2-31
2.17.1 How to measure the speed of a school of fish ............................................. 2-31
2.17.2 How to delete fish marks.............................................................................. 2-32
2.18 Event Mark, Own Ship Position Mark....................................................................... 2-33
2.18.1 How to enter an event mark ......................................................................... 2-33
2.18.2 How to enter an own ship position mark ...................................................... 2-34
2.18.3 How to erase an event mark, own ship position mark.................................. 2-34
2.19 Select Mark Window ................................................................................................ 2-34
2.20 Net Course Mark ...................................................................................................... 2-35
2.21 Net Behavior ............................................................................................................ 2-36
2.22 Menu Items Descriptions.......................................................................................... 2-37
2.23 How to Interpret the Horizontal Display.................................................................... 2-40
2.23.1 Bottom and school of fish echoes ................................................................ 2-40
2.23.2 Unnecessary echoes.................................................................................... 2-42
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............................................................................................................ 3-6
3.6 How to Measure the Range, Bearing to a Target....................................................... 3-6
3.7 How to Eliminate Weak Echoes ................................................................................. 3-7
3.8 How to Adjust Strong and 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
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