I have another idea, should be able to epoxy a rare earth magnet to where the suction cup was. If it does not stick enough to just the aluminum (don't ask me why they don't need ferrous metal to stick at all) I could just put a steel washer on the inside of the boat, that should be plenty strong enough to hold it on.
I'll still try to shoot through the hull if it can go through 3' of ice
|