Submarines were first widely used during World War I (1914–1918), and now figure in many large navies. For reasons of naval tradition, submarines are usually referred to as "boats" rather than as "ships", regardless of their size.Īlthough experimental submarines had been built before, submarine design took off during the 19th century, and they were adopted by several navies. The noun submarine evolved as a shortened form of submarine boat (and is often further shortened to sub). Used as an adjective in phrases such as submarine cable, "submarine" means "under the sea".
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. The term most commonly refers to a large, crewed, autonomous vessel. It differs from a submersible, which has more limited underwater capability.
For other uses, see Submarine (disambiguation).Ī Russian Navy Typhoon-class submarine underwayĪ submarine is a watercraft capable of independent operation underwater.
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