Hi Dave,

I use one of the early inexpensive Humminbird SmartCast finders that use the transducer that can be tied to a spinning/casting line. What I do is tye the transducer to my kayak with a short length of 20# test line so that it floats just beside it. I usually leave the fish alarm and such switched off, and just use the bottom contour display to find submerged trees, tractor tires, etc. in a local lake.

Jeff

"Any rod good rod. Good line, much work!"