U-Boat Worx's new Super Sub has just completed sea trials, with engineers confirming it is the world’s fastest and most advanced private submersible.

The March 4 incident in the Indian Ocean marked the first time an American submarine had torpedoed an enemy vessel since the last days of World War II.

Every U-boat commander in 1940 knows the drill: stay outside the destroyer screen, fire at periscope depth, dive, and vanish.

Coast guard rescuers pulled all 21 people out of the water, but a 17-year-old female student and the captain of Fukutsu were ...

A nuclear attack submarine may be the most formidable predator ever built. In 2009, I spent a week submerged aboard the USS Miami, a nuclear-powered Los Angeles-class submarine known to its crew as ...