Whale falls have since been found by other scientists, and by military submarines.

A U-boat was a type of military submarine used by Germany.

However, the first military submarine was constructed in 1885 by Isaac Peral.

With the rise of the military submarine after this time, countermeasures were considered for use against them.

The programme would have a budget of $200 million for environmental sensors on military submarines, ships and aircraft.

This is acceptable for civilian research submersibles, but not military submarines.

Most modern military submarines generate breathing oxygen by electrolysis of water.

Canada and Spain followed in permitting women to serve on military submarines.

Most modern military submarines are powered by nuclear reactors.

Maybe they could recycle some of those power systems currently mouldering in Russian military submarines.