TABLE OF CONTENTS
vii
3.10 How to Adjust Beam Width.......................................................................................3-15
3.11 Other Menu Items.....................................................................................................3-16
3.12 Usage in 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
4.1 Basic Operating Procedure ........................................................................................4-1
4.2 Indications and Marks.................................................................................................4-2
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 and Weak Echoes....................................................................4-8
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.......................................................................................4-12
4.10.3 Interference rejector .....................................................................................4-13
4.10.4 Shift TX frequency........................................................................................4-13
4.10.5 Noise limiter..................................................................................................4-14
4.10.6 Reverberation...............................................................................................4-14
4.10.7 Echo average ...............................................................................................4-15
4.10.8 How to suppress sidelobes ..........................................................................4-15
4.11 How to Adjust Beam Width.......................................................................................4-15
4.12 How to Track a School of Fish..................................................................................4-16
4.12.1 How to select the target lock mode ..............................................................4-16
4.12.2 Fish mode.....................................................................................................4-17
4.12.3 Target mark mode ........................................................................................4-18
4.12.4 Target lock menu description .......................................................................4-18
4.13.1 How to set the bearing .................................................................................4-19
4.13.2 How to select the audio sector .....................................................................4-19
4.13.3 Reverberation for audio signal .....................................................................4-20
4.14 Fish Alarm ................................................................................................................4-20
4.15 How to Relocate a School of Fish ............................................................................4-21
4.15.1 Manual offcenter...........................................................................................4-21
4.15.2 Automatic offcenter ......................................................................................4-22
Summary of Contents for FSV85MK2
Page 12: ...SYSTEM CONFIGURATION xii This page is intentionally left blank ...
Page 74: ...2 HORIZONTAL MODE 2 44 This page is intentionally left blank ...
Page 128: ...4 SLANT MODE 4 36 This page is intentionally left blank ...
Page 132: ...5 NUMERIC GRAPHIC DATA DISPLAY 5 4 This page is intentionally left blank ...
Page 188: ...9 MAINTENANCE 9 24 This page is intentionally left blank ...
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