They knew that at any moment, German U-boats could descend upon them. Disaster struck at 4:15 p.m. The German UB-64 launched a torpedo that hit the vessel's starboard side and caused an explosion.

Now, the British, obviously very vulnerable, to U boat attacks, developed a strategy to overcome that, and these were called Q ships. [00:03:18] Michael Muir: So the answer to a U boat is a Q ship ...

A German U-boat torpedoed the Norlindo on May 4, 1942, off Southwest Florida’s Dry Tortugas, and it sank so quickly that five of the 28 men aboard did not have time to escape.

It's the German submarine U-576, resting on its side, right where it sank in 1942. Its wooden deck plates have rotted away after 74 years underwater.

As the USS Borie prepared to ram a German U-boat in the early morning hours of Nov. 1, 1943, the sailors on the Navy destroyer braced for impact. Turbulent waters in the north Atlantic Ocean ...

Once you break it out, it makes sense, and U-boat is simply a shortened version of the German word, though in Deutsch, they're referred to as U-Boot. Sadly, very few remain today. Where you can ...

During that time, U-boat captains became so confident that on Feb. 28, 1942, U-578 torpedoed the destroyer Jacob Jones off Cape May, New Jersey; only 11 of its 114-man crew survived.

[00:04:37] Michael Muir: It was a U boat 20, I believe, and what made this really controversial is the British, first of all, as they would, were complaining this was just evidence. this is a ...