A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.)

Apr 14, 2026 · A submarine is any naval vessel that is capable of propelling itself beneath the water as well as on the water’s surface. This is a unique capability among warships, and submarines are quite …

May 12, 2026 · The Navy’s Sixth Fleet shared an image of the Ohio-class submarine and its crew docked Sunday in Gibraltar, a British territory off Spain’s southern coast.

5 days ago · The meaning of SUBMARINE is underwater; especially : undersea. How to use submarine in a sentence.

Jun 25, 2023 · In this very unusual picture of a submarine in dry dock for maintenance, you can clearly see how big a submarine really is—and that it really is almost a perfect cylinder.

May 12, 2026 · The Navy shared a photo of a ballistic-missile submarine docked in Gibraltar, saying its presence demonstrates the US commitment to NATO allies.

May 2, 2026 · US Navy’s next 21,000-ton nuclear-powered ballistic missile submarine to be delivered in 2028 The first submarine in this class was initially planned for delivery earlier.

Cornelius van Drebel of the Netherlands constructs a wooden submarine for King James I of England. The submarine is propelled by 12 oarsmen who use waterproofed leather sleeves to row through …

Dec 18, 2024 · The first nuclear submarine, USS Nautilus, was launched in 1954 and could stay submerged for long periods without the need to surface. This breakthrough allowed submarines to …

Submarine technology covers how underwater vessels operate, navigate, maintain air quality, and support crew on extended submerged missions.