for anyone who might be interested, here are the pics of how to set up a standard transducer for internal mounting in a kayak
make a cradle for the transducer out of closed cell foam with a hole cut out that the transducer fits snugly into. anti-fatigue mats from home depot are a good source for the foam. silicone or 5200 that in place on the bottom of the inside of the kayak.
then, to use it, fill the hole in the piece of foam with water and stick the transducer in it. the water is important because it works to conduct the transducer signal through the hull. the water doesn't evaporate because there should be a good seal between the foam and the transducer.
that's it; pretty simple, works great. these pictures are of the mount that KFS put on my neighbor's hobie sit on top, but you can use the same method for any kayak, sit in or sit on top.
