Thanks Nick for this forum, I'm building a CLC Chesapeake 18LT and plan on rigging for fishing/touring. I'm hoping some has experience with mounting transducers inside the hull. In a plastic or glass boat the transducer is glued inside with 5200 and the sonar "looks" clean thru it as if the hull is invisible.I'm wondering if there are refraction issues or other considerations in my scheme. Anyone tried this in a ply/epoxy hull? Thanx in advance Dave PS There is a great post on kayak fishfinders 101 at the Coastal Kayak Fishing site West Coast Bullitin Board