It would take several direct hits to put a Two class, with its double hull, down for good.

He estimated the cost at 15 to 20 percent, similar to a double hull or partial loading.

A. I think we are going to have to go to double hulls.

She had a partial double hull, which extended over 75% of her length.

The question of double hulls was explored extensively in the 1970's, she said.

The resulting design changed from the saddle tanks common at the time to a double hull.

A strong, durable vessel, she was built of steel with a double hull.

It will also be necessary to monitor the performance of double hulls closely over time.

We're not a real double hull, and the outrigger is light; the wind may try to pick it up.

Somebody told me they work together, like the double hull of a submarine or something.