Furuno FSV-85 - Page 7

TABLE OF CONTENTS
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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