"Unsinkable" works for Boston Whaler, but didn't work out too well for the
Titanic.
What about sealing the boats storage lockers? You could have some sort of
plugs for the limber holes to be kept handy and only used if things got
scary.
MMC
wrote in message
nk.net...

Jeff wrote:
...
If it was designed into the boat, it would be 13 cu ft per foot,
or about 3 inches thick around the hull and deck. This would
also add a lot of stiffness, insulation, collision protection, etc.
However, if you were doing it from scratch, you'd probably
pick a much lighter design - the Etap 46 is 27000 lbs while
the Tayana is actually 42000.

Maybe it's easier to make a MacGregor seaworthy than to make
a Tayana unsinkable :-)