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List submarines of the United States Navy, by hull number and boat name Hull number Name Notes Turtle: World's first combat submersible. Deployed in 1775. Failed mission to destroy HMS Eagle. Continental Army project. Alligator: Experimental submarine built in 1862. Foundered in bad weather in 1863. First submarine of the United States Navy.
Class name Number of boats First boat laid down Last boat commissioned Notes Virginia: 48 (planned) USS Virginia (SSN-774) 2 September 1999: USS New Jersey (SSN-796) September 14, 2024: Attack submarine. 23 commissioned as of September 2024. Columbia: 12 (planned) USS District of Columbia (SSBN-826) (planned) Ballistic missile submarine
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 addition to a name, each U.S. submarine carries a Class designation followed by an assigned hull number.
Nuclear submarines of the United States Navy (15 C, 206 P) R. Research submarines of the United States (11 P) S. Ships sunk by American submarines (1 C, 188 P)
Fact File: Attack Submarines - SSN. United States Navy. "Fact File: Fleet Ballistic Missile Submarines - SSBN". United States Navy. "Submarine Service: Operations and Support". Royal Navy. "SSBN-726 Ohio-Class FBM Submarines". Federation of American Scientists.
The US Navy has a total of 18 Ohio-class submarines which consist of 14 ballistic missile submarines (SSBNs), and four cruise missile submarines (SSGNs). The SSBN submarines provide the sea-based leg of the U.S. nuclear triad. Each SSBN submarine is armed with up to 20 Trident II submarine-launched ballistic missiles (SLBM).
In the 67 years since the Navy launched the world's first nuclear-powered sub, USS Nautilus, its boats have only gotten more capable and more deadly.
The Los Angeles class of submarines are nuclear-powered fast attack submarines in service with the United States Navy. Also known as the 688 class (pronounced "six-eighty-eight") after the hull number of lead vessel USS Los Angeles (SSN-688), 62 were built from 1972 to 1996, the latter 23 to an improved 688i standard.