Posted by baitbucket on March 17, 2003 at 13:00:15:
In Reply to: Fishfinder Help posted by Alex Chapman Max Xia on March 17, 2003 at 12:45:31:
reciever is not sensitive enough to detect reflected sound waves without a dense medium (i.e., water). too much attenuation of sound in air even over short distances. Anybody who has ever installed a transducer knows that they will not work in the presence of air bubbles; it must be totally submerged.
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