Furuno FSV-30 Operator's Manual page 6

2.9 Rejecting Sonar Interference and Noise ......................................................................... 2-18
2.9.1 Identifying noise source ...................................................................................... 2-18
2.9.2 Interference rejector............................................................................................ 2-18
2.9.3 Changing Tx interval ........................................................................................... 2-19
2.9.4 Shifting Tx frequency .......................................................................................... 2-19
2.9.5 Noise limiter ........................................................................................................ 2-20
2.9.6 Echo average...................................................................................................... 2-20
2.9.7 Reverberation reduction ..................................................................................... 2-20
2.9.8 Setting reference bearing for frequency change ................................................ 2-20
2.9.9 Suppressing gain of bottom echo ....................................................................... 2-20
2.10 Adjusting Beamwidth ....................................................................................................... 2-21
2.11 Tracking a Fish School (target lock) ................................................................................ 2-22
2.11.1 Selecting target lock type.................................................................................... 2-22
2.11.2 Fish school tracking mode .................................................................................. 2-23
2.11.3 Position tracking mode........................................................................................ 2-24
2.11.4 Other items on the TARGET LOCK menu .......................................................... 2-24
2.12 Detecting Fish Schools Aurally........................................................................................ 2-26
2.12.1 Selecting direction............................................................................................... 2-26
2.12.2 Selecting audio sector......................................................................................... 2-27
2.12.3 Automatic training ............................................................................................... 2-28
2.12.4 Reverberation ..................................................................................................... 2-28
2.13 Presentation Mode........................................................................................................... 2-29
2.13.1 Presentation mode description ........................................................................... 2-29
2.13.2 How to select a presentation mode .................................................................... 2-30
2.14 Fish Alarm........................................................................................................................ 2-31
2.15 Relocating Fish School for Easy Observation................................................................. 2-33
2.16 Comparing Fish School Concentration............................................................................ 2-34
2.17 Measuring Fish School Speed......................................................................................... 2-35
2.17.1 Entering fish marks ............................................................................................. 2-35
2.17.2 Deleting fish marks ............................................................................................. 2-36
2.18 Event Mark, Own Ship Position Mark.............................................................................. 2-37
2.18.1 Entering an event mark....................................................................................... 2-37
2.18.2 Entering an own ship position mark.................................................................... 2-38
2.18.3 Erasing an event mark, own ship position mark................................................. 2-38
2.19 Net Course Mark.............................................................................................................. 2-39
2.20 Observing Net Behavior .................................................................................................. 2-40
2.21 Storing, Recalling Picture ................................................................................................ 2-41
2.21.1 Storing the picture ............................................................................................... 2-41
2.21.2 Recalling stored picture ...................................................................................... 2-41
2.22 OTHERS Menu Overview on the H-SCAN SETTING Menu .......................................... 2-42
2.22.1 Displaying the OTHER menu.............................................................................. 2-42
2.22.2 OTHERS menu description ................................................................................ 2-43
2.23 Interpreting the Horizontal Display .................................................................................. 2-46
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