"Alec" wrote in message
...
No, underside has been checked.

I was thinking of electrical failures which have been seen before.

Alec

"Lynn Coffelt" wrote in message
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"Alec" wrote in message
...
I have an autohelm tridata log and depthsounder.

The depth function is intermittent.

I have changed the transducer which seemed to fix the problem for a time
but
it has reoccurred.

Any ideas?

Alec

Algae, barnacles or other stuff growing on face of transducer?
Old Chief Lynn

I had same problem, in my case it turned out to be the instrument.