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SAFETY INSTRUCTIONS
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2.9.6 Echo average ............................................................................................ 2-23
2.9.7 Reverberation reduction ............................................................................ 2-23
2.9.8 Setting reference bearing for frequency change ........................................ 2-23
2.9.9 Suppressing gain of bottom echo .............................................................. 2-23
2.9.10 Sidelobe suppression............................................................................... 2-24
2.10 Adjusting Beamwidth...........................................................................................2-25
2.11 Tracking a Fish School (target lock) ...................................................................2-26
2.11.1 Selecting target lock type......................................................................... 2-26
2.11.2 Fish school tracking mode ....................................................................... 2-27
2.11.3 Position tracking mode............................................................................. 2-28
2.11.4 TARGET LOCK menu.............................................................................. 2-29
2.12 Detecting Fish Schools Aurally ...........................................................................2-30
2.12.1 Selecting direction ................................................................................... 2-30
2.12.2 Selecting audio sector ............................................................................. 2-31
2.12.3 Automatic training.................................................................................... 2-32
2.12.4 Reverberation.......................................................................................... 2-32
2.13 Presentation Mode ..............................................................................................2-33
2.13.1 Presentation mode description ................................................................ 2-33
2.13.2 How to select a presentation mode.......................................................... 2-34
2.14 Fish Alarm............................................................................................................2-35
2.15 Relocating Fish School for Easy Observation ....................................................2-37
2.16 Comparing Fish School Concentration...............................................................2-38
2.17 Measuring Fish School Speed ............................................................................2-39
2.17.1 Entering fish marks.................................................................................. 2-39
2.17.2 Deleting fish marks.................................................................................. 2-40
2.18 Event Mark, Own Ship Position Mark .................................................................2-41
2.18.1 Entering an event mark............................................................................ 2-41
2.18.2 Entering an own ship position mark......................................................... 2-42
2.18.3 Deleting an event mark, own ship position mark...................................... 2-42
2.19 Net Course Mark ................................................................................................. 2-44
2.20 Observing Net Behavior ......................................................................................2-45
2.21 Storing, Recalling Picture ....................................................................................2-46
2.21.1 Storing the picture.................................................................................... 2-46
2.21.2 Recalling stored picture ........................................................................... 2-46
2.22 OTHERS Menu.................................................................................................... 2-47
2.22.1 Displaying the OTHERS menu ................................................................ 2-47
2.22.2 OTHERS menu description ..................................................................... 2-48
2.23 Interpreting the Horizontal Display......................................................................2-51
2.23.1 Bottom echoes ........................................................................................ 2-51
2.23.2 Fish schools ............................................................................................ 2-52
2.23.3 Sea surface reflections............................................................................ 2-53
2.23.4 Wake ....................................................................................................... 2-53
2.23.5 Sidelobe echoes (false echoes)............................................................... 2-54
2.23.6 Noise and interference............................................................................. 2-54