Forward scanning sonar

sm sm at
Mon Mar 30 09:01:31 EST 1998

Mlw2 wrote:

> <snip>
> As water depth decreases, the angle between the sonar signal and the bottom
> becomes increasingly oblique, until a practical limit of reflected signal
> strength is reached.  Thus, forward scanning sonar units are generally limited
> in forward range to about 4-8 times the distance from the transducer to the
> bottom.

...which is plenty when moving cautiously in an uncharted area.


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