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.)

Nov 21, 2025 · 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 …

6 hours ago · Ukraine’s domestic security service, the SBU, said Monday that it struck a Russian submarine in the Black Sea port of Novorossiysk, causing critical damage to the vessel and …

6 days ago · With fifth-generation submarines on the horizon, their technology has come a long way. Ultra-advanced subs of today use nuclear power and beyond.

Apr 24, 2025 · Today’s submarine force is the most capable force in the world and the history of the U.S. Navy. The composition of the current force consists of Los Angeles, Ohio, Seawolf, …

Jul 22, 2025 · A submarine is a specialized watercraft designed for underwater operations. Unlike surface ships, submarines can submerge and navigate beneath the water’s surface, making …

Apr 16, 2025 · The US Navy’s largest-ever nuclear submarine, the USS District of Columbia (SSBN-826), moves closer to launch with final propulsor delivery.

Jul 2, 2025 · Explore the United States' Submarine Force, featuring attack, ballistic missile, and guided missile submarines and their diverse missions.

4 hours ago · Kyiv says Kilo-class submarine is knocked out of operation in the first such attack using Sea Baby drones.

“Submarine” as a noun—meaning a submersible craft—originated as short for "submarine boat" and older books such as Jules Verne ’s Twenty Thousand Leagues Under the Sea always use …