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.)

Oct 15, 2025 · What is a submarine? A submarine is a naval vessel capable of propelling itself both beneath the water and on the water’s surface, a unique capability among warships.

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, …

3 days ago · America's dominance beneath the waves grows as its newest nuclear submarine completed its initial sea trials and prepares for active deployment.

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

In 1920 the U.S. Navy Department established a standard Type and Class letter designation system. "SS" was established as the two-letter class designation for Submarine (first line). In …

Oct 19, 2023 · In order to control the buoyant force acting on it, a submarine fills/empties itself with the surrounding water to dive/resurface. A submarine consists of ballast tanks (and trim …

Background of American Submarines From the first American submarine is 1775 to the world’s first nuclear-powered submarine in 1955, the United States has had many successful …

In this article, you will see how a submarine dives and surfaces in the water, how life support is maintained, how the submarine gets its power, how a submarine finds its way in the deep …

Today’s submarine force is the most capable force in the world and the history of U.S. Navy, comprising 53 fast attack submarines, 14 ballistic-missile submarines and four guided-missile...