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.)

Jan 2, 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 …

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, and Virginia -class...

China has overtaken Russia to become the world’s second-largest operator of nuclear-powered submarines. Updated force assessments indicate that China now operates an estimated 32 active …

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 them …

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

Jun 25, 2023 · Submarines are ingenious bits of engineering designed to carry people safely through this very harsh environment. Although they were originally invented as military machines, and most …

Submarines are popular subjects for films due to the danger, drama and claustrophobia of being on a submarine, and the suspense of the cat-and-mouse game of submarine or anti-submarine warfare.

2 days ago · China’s attack submarine fleet is growing fast. Quiet, persistent boats like the Type 093A could threaten Taiwan, with hypersonic options looming.

Unlike a ship, a submarine can control its buoyancy, thus allowing it to sink and surface at will. To control its buoyancy, the submarine has ballast tanks and auxiliary, or trim tanks, that can be …