'Looks more like the communications centre of a nuclear sub.'

The nearest vessel to the area is a nuclear sub on a training exercise off Antarctica.

I was the sonar officer in a nuclear sub.

What are our nuclear subs up to these days?

The time we saved a nuclear sub from being hijacked with the President aboard?

Well, we got that nuclear sub hid out in the harbor.

If it's a nuclear sub, we can get a cross-bearing after a short sprint.

Coleman, a weapons expert, had commanded a pair of nuclear subs.

"Gentlemen, we have to know this, was he on a nuclear sub?"

The first women officers will begin serving on Vanguard-class nuclear subs in late 2013.