Hello "D", I bought a cheaper unit. It's a Garmin Echo type. I mounted transducer to the trolling motor and it works fine. I just need to use it more to really learn the basics. It does show the stumps and brush really well. Of course on Toledo Bend, there are plenty of those to look at. Rain predicted all week so I guess I'll have to wait a while to play with it some more.......Life is Good...and gets Gooder...