Beat me to it, Matt. I've seen H16s float with a ridiculous about of damage, as well as (several) H17s and H18s with bows ripped completely off.

EDIT: I don't recall ever seeing a boat with both hulls ripped open, it's definitely possible (a boat "giving" the T-bone, as opposed to "receiving" the T-bone, might get both bows comprimised)...

Mike