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

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.

Coast guard rescuers pulled all 21 people out of the water, but a 17-year-old female student and the captain of Fukutsu were later pronounced dead, officials said. Two people were injured but their ...

President Donald Trump bemoaned US allies who have rebuffed his demands to send warships to help escort tankers through the Strait of Hormuz. Follow for live news updates.