ORIGINAL: ToothyCritterGitter i saw at gander mountain a castable wireless fisfinder, you cast it like a lure, reel it back in slow, and the info is transmitted to an lcd watch screen... you can scan for fish as far as you can cast! pretty cheap too!
ORIGINAL: NeFiShNeTiMe I use my vex off the boat all of the time. I have tried it off the pier but didn't mark a thing. I think a floating dock would be the best bet.
ORIGINAL: NeFiShNeTiMe I throw both anchors and hang transducer about 6" below the boat. It works just like u would use it on the ice. I want to get the alumaducer in the spring. I have only used it on pi bay for perch