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Re: [PSUBS-MAILIST] Re: SONAR

Good question. The answer is no, now unless they are both on the same
frequency.
The received is tuned to receive a certain frequency (range) and it is
listening for its own bounce.
It's like two radio operators standing next to each other talking to
someone on the other end. The two radios do not mix and confuse the
receivers.

Ed

Michael B. Holt wrote:
> 
> What problems appear if one uses TWO fishfinders: one pointed down to
> give distance below the keel and one pointed up to give distance to
> the surface?  Would the two interact to produce false readings?
> 
> Mike