bb2fish,  The transducer isn't exposed to air, but its not in a bath either. I used marine goop and stuck it directly to the hull. I don't own this boat anymore but as far as I know, everything is still smooth ops.

I just wanted to show that there are other advantages to using the pool noodles in the hull. Like stuffing all of the loose FF wiring into one and using it as the spine for the rest of the flotation.

Ill be starting another project like this very soon and I'll document and share.

A Cleopatra's needle example
Looks like someone didn't think a SOT needed flotation.

Bet that's a bitch swimming that thing with the scuppers as a handle.