Here is a link to a forum with some great info on keeping warm during the winter on your boat plus lots of other great warmth info Warmth...this way lol
Daily life living on a boat. The pros & cons, the ups & downs Ahoy, Matie!
Only the guy who isn't rowing has time to rock the boat.
-Jean-Paul Sartre --French existentialist philosopher and writer, 1905-1980