Peter Kafer wrote:
> Does anyone have any experience with in hull type transducers, the 
> kind that are mounted inside the hull, eliminating the need to bore a 
> hole in the bottom?  Are they as reliable as through hull transducers?


I have mounted, in my boat and others, transducers designed to be used 
with a through hull, inside the boat with very good results. I always 
built a small sealed box which I filled with water and placed the 
transducer in that.

Others say it limits the range or sensitivity unless your hull is thin. 
Well, my early '70s boat has a VERY thick hull, and the transducer seems 
to work as well as if it were outside.

Some glue the transducer to the hull, I did that at first, but it was a 
REAL PITA when the unit failed and I had to remove it!

Where you place it is important, much fwd of the keel makes problems, 
too far aft and prop wash makes it erratic.-Ken
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