Re: (No Through Hull) Transducer
Aboard my powerboat, I spray the paddle wheel with aerosol anti-fouling intended for sterndrives and outboards. It works pretty well. Of course I cruise at 23 knots and often run at 30 kts, so that there is a fair degree of "self cleaning" going on. Your mileage may vary.
Additionally, I usually go overboard with a mask and fins once a month, during the warmer seasons, and check the bottom, including the ducers. I make this task part of the day when we anchor to swim, fish, clam or wade in to the beach. If a growth is occurring, I clean it off ( which of course removes some antifouling paint, so its a double edged sword)
This new ship here is fitted according to the reported increase of knowledge among mankind. Namely, she is cumbered end to end with bells and trumpets and clocks and wires. It has been told to me she can call voices out of the air or the waters to con the ship while her crew sleep. But sleep though lightly. It has not yet been told to me that the sea has ceased to be the sea.--Rudyard Kipling