Article View: sci.electronics
Article #20259Re: Depth Finder Problem
From: John B. Nagle
Date: Tue, 27 Dec 1988 17:35
Date: Tue, 27 Dec 1988 17:35
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In article <8812271430.AA18210@decwrl.dec.com> starin@abe.dec.com (Mark Starin KB1KJ DTN: 264-5596 MK01-1/A10) writes:
>The depthfinder on his sailboat works fine when he's under sail.
>However, as soon as he lights off the "iron main", the depthfinder
>indicator starts giving messed up indications.
Well, of course! Depth finders are acoustic devices; they bounce
a pulse of sound off the bottom and time the echo coming back. Any source
of noise in the water, such as a noisy engine, will cause interference.
Try moving the depthfinder's transducer to a location as far from the engine
and prop as possible.
John Nagle
Technical Details
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arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!think!ames!pasteur!ucbvax!decwrl!labrea!glacier!jbnReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!think!ames!pasteur!ucbvax!decwrl!labrea!glacier!jbn From: jbn@glacier.STANFORD.EDU (John B. Nagle) Newsgroups: sci.electronics Subject: Re: Depth Finder Problem Message-ID: <17943@glacier.STANFORD.EDU> Date: 27 Dec 88 17:35:56 GMT References: <8812271430.AA18210@decwrl.dec.com> Reply-To: jbn@glacier.UUCP (John B. Nagle) Organization: Stanford University Lines: 12