I launch my boat at gravel ramps, and am getting ready to mount a transducer. I changed my mind from using a portable one, and am going to mount it on the trolling motor. I'm concerned that when I beach my boat, I would knock off a tranducer that's mounted on the back of the boat. I'm curious as if anyone has had a problem hitting a permanently mounted transducer, when they beach thier boat? Maybe, since this is my first fish finder, I'm being a little paranoid.