A hull within a hull. Some ships (tankers) have them in case the outside
hull is holed, the inside hull will keep her afloat and keep the oil out of
our ocean.

Scotty


"Veridican" wrote in message
...
What the hell is "double hulled" How can a boat be double hulled. I mean
one
can have a layer, then a foam core--let's say, and then another layer, but
that's still just one hull.

And as far as penetrated, I never worried about that with the Mac. With
any
boat, if you sail it into the rocks, you're ****ed.

The Veridican