Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ncr-sd.UUCP Path: utzoo!linus!decvax!ittatc!dcdwest!sdcsvax!ncr-sd!geoff From: geoff@ncr-sd.UUCP (Geoffrey Walton) Newsgroups: net.rec.boat Subject: Re: In-Hull Transducers Message-ID: <317@ncr-sd.UUCP> Date: Thu, 31-Oct-85 12:39:52 EST Article-I.D.: ncr-sd.317 Posted: Thu Oct 31 12:39:52 1985 Date-Received: Sun, 3-Nov-85 15:04:17 EST References: <139@biomed.UUCP> Organization: NCR Corporation, Torrey Pines Lines: 33 > > Steve Shelley asked about an inside mounted transducer for a depth > sounder in a previous article: I used to do rigging work for several local yacht dealers, and inside-mounted transducers were standard installation for all of them. Most any type of sealable container was attached to the inside of the hull, filled with liquid (watch out for algae growth, mineral oil or some sterile solution is best), and capped with a plate which held the transducer. There are a few caveats, however, to the installation: 1. remember that the depth will be measued from the tranducer, NOT from the max. depth of the keel, so you need to know the distance above max. depth of the installation; 2. the fluid level in the container should be checked on a regular basis; 3. the hull may cause an echo (depending on material and density), which can be distracting, or may resonate; 4. the transducer mounting plate MUST be level (fore and aft, AND athwartships) under normally-loaded conditions, at rest. We used several different brands, and various installation methods, ranging from elaborate and specialized to a piece of ABS sewrer pipe with a push-fit cap which held the transducer. I have yet to hear of any problems from any of the dealers or owners. Geoff Walton NCR E&M San Diego {wherever}!ucbvax!sdcsvax!ncr-sd!geoff Even the smallest problem becomes unsolvable if enough meetings are hel to discuss it.