Nutsy,
I think you may have run that "HOOK" into your thumb. With a couple of
6volt Fans and open hatches a boat on the water can be kept very
comfortable and a lot more economical than a AC.
Out here, in the Pacific NW the water temp never get above 50 degrees.
Very nice if you can circulate it. Even LISound, as I remember doesn't
get into the 80's very often. BUT
A AC is very nice but a space hug. If you have one you're just about
obligated to use it.
http://community.webtv.net/tassail/ThomPage