I guess there's a few things to be said about this guys sanity. At least he had a life jacket on

Jon if I remember right you sail on a lake. Its not the North Atlantic Ocean in the winter. You want to look at a dry or a gortex type suit. That way you can layer underneath using poylpropelyene underwear and fleece. Neoprene booties,glove and hat. There's the neoprene face masks. Just the way you would for any extended time out in the cold.

Remember shivering means you body is chilling and its trying to warm it self. That means take a break or put on more clothes.

Mike