A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed, autonomous vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Used as an adjective in phrases such as submarine cable, "submarine" means "under the sea". The noun submarine evolved as a shortened form of submarine boat (and is often further shortened to sub). For reasons of naval tradition, submarines are usually referred to as "boats" rather than as "ships", regardless of their size.

Although experimental submarines had been built before, submarine design took off during the 19th century, and they were adopted by several navies. Submarines were first widely used during World War I (1914–1918), and now figure in many navies large and small. Military usage includes attacking enemy surface ships (merchant and military), submarines, aircraft carrier protection, blockade running, ballistic missile submarines as part of a nuclear strike force, reconnaissance, conventional land attack (for example using a cruise missile), and covert insertion of special forces. Civilian uses for submarines include marine science, salvage, exploration and facility inspection/maintenance. Submarines can also be modified to perform more specialized functions such as search-and-rescue missions or undersea cable repair. Submarines are also used in tourism, and for undersea archaeology.

Latest News for: The submarine


The U.S. has announced the cause of the submarine collision in the East Sea

Swords Today 24 May 2022
said the submarine crashed into a slightly surveyed area in the South China Sea off Connecticut, emphasizing that the incident was the fault of the crew ... United States The submarine said in an incident report published yesterday ... Navy did not specify the damage to the submarine or estimate the time and cost of the repairs....

For a stronger navy, India needs to fast-track the submarine project

Indian Express 16 May 2022
It is only the period after mid- to late-2019 — the Modi government’s second term — that has witnessed a doubling of consumer prices of imported vegetable oils ... read more For a stronger navy, India needs to fast-track the submarine projectGovt bans wheat exports after new low output estimate, says need to ensure food availabilityGlimmer of hope....

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