"Michael Sutton" wrote ...
My first thoughts are 12-gauge shotgun to carry in the boat.

Winchester makes a stainless steel "Defender" model... Something like 8
shots of 000 buck should mess up his fiberglass somewhat... If you're lucky,
you might hit a gas can and cause it to leak... Follow up with a flare
gun... Personally, I carry my .45 with me whenever I'm boating... I keep it
in a dry box so that it will be protected from the sal****er... I would
think that 11 rounds of .45 should be enough to deter someone in most
situations...