I am looking at buying a river power boat that is for sale that has an in hull transducer left over from a previous owner. The depth finder is no longer there for use. Admittedly, I am sort of new to the power boat scene, but it strikes me as odd to have something sticking down about 1/4 inch past the bottom of a flat bottomed river boat. My concern is with it getting caught on something and getting ripped out or the seal degrading over time and having a leak. Perhaps I am naive, but a hole in the bottom of my boat makes me a little nervous. I plan on using the boat mostly on the Kenai, but a trip to the Yukon for moose is not out of the question.