Seabed Echoes .......................................................................................................................6-1
Fish Schools ...........................................................................................................................6-2
Sea Surface Reflections ......................................................................................................... 6-3
Wake ......................................................................................................................................6-3
False Echo by Sidelobe..........................................................................................................6-4
Noise and Interference ...........................................................................................................6-4
Display Unit Maintenance ..................................................................................................... 7-1
Hull Unit Maintenance ..........................................................................................................7-2
Diagnostic Tests ..................................................................................................................... 8-3
.......................................................................................................9-1
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