Im in NJ, but my guess is that you should treat the boat as any other vehicle, (RV, plane, car, etc), so if you think you can shoot from your car (not), don't. Duck hunting during the season is covered by your hunting license. So if you were on your way to the trap range in your car in the summer with a cased unloaded shotgun and your stopped your ok. Common sense applies under these circumstances. If your in your boat offshore out of hunting season in possession of a firearm common sense also applys, so unless you could convince an officer you are on your way to a range in Toronto you may have a problem. Thats just an opinion. NYC has different, more strick gun Laws (Plaxico Burris)