Re: Full or fin keel?
Seems, too, that boats with hard bilges and high form stability are going to be more likely to 'follow the sea surface' in a beam sea and therefore 'roll' more dramatically as a wave passes underneath.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"