Furuno 1823C manual Marker-zoom display plus normal sounder display, Bottom-zoom display

4. VIDEO SOUNDER OPERATION

Marker-zoom display plus normal sounder display

Bottom-zoom display

The bottom-zoom display expands bottom and bottom fish echoes by the zoom range selected on the SOUNDER RANGE SETUP menu (see paragraph 5.9.3), and is useful for determining bottom hardness. A bottom displayed with a short echo tail usually means it is a soft, sandy bottom. A long echo tail means a hard bottom.

Bottom-zoom display plus normal sounder display

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