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4806Re: Depth Transducer - hull thickness

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  • johndean61840
    Jul 8, 2009
      ---Hi Bob

      I have been doing about the same thing in my cn32, cheers, john dean In campernicholson@yahoogroups.com, "J. Seth Strattan" <strattan@...> wrote:
      > --- In campernicholson@yahoogroups.com, "Bob Horvath" <horvath@> wrote:
      > >
      > > Is anyone using an in-hull depth transducer?
      > > I am trying to discover whether an Airmar P79 will work
      > Hi Bob - I fitted an Airmar P79, horizontally, on the centerline, on the forward-most flat spot accessible through the hatch in the cabin sole beneath the V-berth. It works fine with my Navman 3100 depth instrument. I installed it mostly as an experiment, not really expecting it would be able to read through such a thick area, but I'm satisfied with the performance.
      > I leveled the area with a disc sander, finishing with a fine grit. I installed the beveled mounting ring with 3M 4200 in the "0-degree" (horizontal) position. After the 4200 dried I filled the ring with mineral oil and screwed down the P79. No oil leaks yet, so the O-ring seal between the P79 and the ring seems to work fine.
      > Test the operation of the transducer by putting it over the side of the boat with the face of the transducer in the water, pointing at the bottom. You should get good depth readings. Then you can fill a small plastic bag with water, set that on the inside surface of the hull wherever you might want the transducer to live permanently and hold the transducer against that bag (the idea being to provide a "cushion" of water between the transducer and the fiberglass). If it's a workable spot, you'll get a good reading of the depth on your sounder display.
      > I hope it works for you.
      > Seth
      > Liberty, CN 35 #21
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