His son is preparing for two related careers - one in Navy submarines, one in general engineering.

The producers report that their cameras are the first in more than 20 years to be permitted aboard a Navy submarine.

She's close to the dimensions of the first Navy submarine with advanced hydrodynamic design that was launched in 1953.

More recent research efforts have probed the region, some by icebreaker or Navy submarine.

In 1959, a Navy submarine even fired a missile containing 3,000 letters in an effort to increase delivery speed.

She was the second Navy submarine to bear the name.

How about spending a week or so beneath the surface of the sea in nuclear-powered Navy submarines?

A Navy submarine's sinking of a Japanese fishing boat was a freak occurrence.

Stalwart spent the first part of her career on patrol for Soviet Navy submarines.

The situation changed after a Navy submarine, the Thresher, sank with 129 men in 1963.