Quote Originally Posted by Tristan Bladon View Post
Is there a "magic" distance for the 800 say 50'? Or depth?
Environmental variables will play a large part in range capability of each frequency ...

A hard gravel bottom in deeper water may reflect more sound than a mud bottom in shallower water ...
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Deciding which frequency to use when should be determined by the task at hand ...:

If one wants to see detail of stuff close to the boat = use 800kHz ...

If one wants to find new stuff farther away from the boat = use 455kHz - then drop a waypoint on it and reposition the boat closer to scan it again with 800kHz to see the detail of it ...

Rickie