Where do you see this in the regulations??? I looked and can't find anything. I agree about the boat being a vehicle, but what I've read in the regulations state that for hunting purposes you can shoot from a boat only if forward momentum of the motor has ceased. It's the same case as in duck hunting. I have also not come across anything that talks about shooting a deer while crossing a water source. If you find it, let me know because the DNR still has the names of the people I turned in. The gorup of neighbors around here are planning on posting a lot of signs next year and will be trying to turn anyone in that is even close to breaking a regulation. Again if you can find it in writing please show where so I can read it.