Originally Posted by ctl411;1113695...
ong narrow fins are good for ultimate performance up to the point where you ground out or a little bump breaks the boat.
If the boat is well built, as most are, a little bump is not going to break the boat. Some way back on this thread there is a movie with a racing boat with very narrow and deep torpedo keel being dragged (after having grounding with waves) on the beach to the sea (with waves again) and being put afloat again. Lots of hard bumps and the keel remained solid and on its place.