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Electrical
inside hull fishfinder mounting
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<blockquote data-quote="iam2sam" data-source="post: 414166" data-attributes="member: 20253"><p>Yep, I'm certain the manual does say that. I'm also certain that I have seen posts from numerous parties (possibly not on this board) who claim that they have done this with unqualified success. The consensus seems to be that there needs to be an uninterrupted conductor for the sonic/ultrasonic radiation between the transducer and the reflecting object or surface, and that water-Al-water with no air gap consitutes such a conductor. I have a strong preference for avoiding through hull holes below the water line, sealed or not. I would have tried this with my aluminum canoe, except for the fact that the Garmin FF I had for that boat had a temp sensor (the Lawrence does not) and that obviously wasn't going to work.</p></blockquote><p></p>
[QUOTE="iam2sam, post: 414166, member: 20253"] Yep, I'm certain the manual does say that. I'm also certain that I have seen posts from numerous parties (possibly not on this board) who claim that they have done this with unqualified success. The consensus seems to be that there needs to be an uninterrupted conductor for the sonic/ultrasonic radiation between the transducer and the reflecting object or surface, and that water-Al-water with no air gap consitutes such a conductor. I have a strong preference for avoiding through hull holes below the water line, sealed or not. I would have tried this with my aluminum canoe, except for the fact that the Garmin FF I had for that boat had a temp sensor (the Lawrence does not) and that obviously wasn't going to work. [/QUOTE]
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