Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site biomed.UUCP Path: utzoo!linus!philabs!cmcl2!harvard!talcott!wjh12!biomed!lagasse From: lagasse@biomed.UUCP (Robert C. Lagasse) Newsgroups: net.rec.boat Subject: In-Hull Transducers Message-ID: <139@biomed.UUCP> Date: Mon, 28-Oct-85 11:18:37 EST Article-I.D.: biomed.139 Posted: Mon Oct 28 11:18:37 1985 Date-Received: Thu, 31-Oct-85 22:27:47 EST Organization: Mass. Gen. Hosp. - Dept. Biomed. Engineering Lines: 12 Steve Shelley asked about an inside mounted transducer for a depth sounder in a previous article: Steve, I have seen advertisements in several boating catalogs for a small clear plastic dome with a lip around the edge which gets screwed and/or glued down to the inside of your hull. The dome is inverted. The transducer is placed inside the dome. The dome is then filled with a fluid, mineral oil I think. This fluid couples the sound waves from the hull to the transducer. I do not know how well they work. I believe you have to use a different transducer than the type that gets mounted on the transom, but maybe not. You should consult a local marine electronics installation person for more help.