High-tech gadgets purify sea water and manufacture oxygen, so this nuclear sub need never come up for air.

By coincidence, a full house will tally numerically with the hundred-plus seamen aboard a nuclear sub.

I am surprised we don't have one nuclear sub and aircraft carrier for each continent in case we are involved in more than one conflict at a time.

Swimming by his nuclear sub one day - with fresh water at a premium, that's how submariners wash themselves - he bumps up against a shark.

At the height of the conflict, we provided 32 planes, four ships and a nuclear sub.