I did THIS with THAT
I've heard a lot about those Vexilar Sonar Phone units but had never played with one on the water. I wasn't drilling any holes in my boat to mount a "portable bottom machine", so I decided I would attach it to the jet ski and see what happened. Attached, by the way, is with a tie wrap to one of the fins on the right side. I even tie wrapped the power and wifi box to the bracket on top of the battery. All in all...no holes and you can see the difference in the maps where I scanned with the ski (below).