[marktwain]

What happens to hull when out of date?

Replaced with a new hull.

One of the big points of these things is they are *not* dangerous.

So what if pirates, terrorists, or any unauthorized people get control?

The design prevents them from blowing up.

If they sink, they go solid.

Resurface them, refurbish if necessary, and start them up.

[TexasGator]

ROTFLMAO!