The Ohio class of nuclear-powered submarines includes the United States Navy's 14 ballistic missile submarines (SSBNs) and its four cruise missile submarines (SSGNs). Each displacing 18,750 tons submerged, the Ohio-class boats are the largest submarines ever built for the U.S. Navy. They are also the third-largest submarines ever built, behind the Russian Navy's Soviet era 48,000-ton Typhoon class, the last of which was retired in 2023, and 24,000-ton Borei class. Capable of carrying 24 Trident II missiles apiece, the Ohio class are equipped with just as many missiles as, if not more than, either the Borei class (16) or the deactivated Typhoon class (20).
A submarine-launched ballistic missile (SLBM) is a ballistic missile capable of being launched from submarines. Modern variants usually deliver multiple independently targetable reentry vehicles (MIRVs), each of which carries a nuclear warhead and allows a single launched missile to strike several targets. Submarine-launched ballistic missiles operate in a different way from submarine-launched cruise missiles.
A ballistic missile submarine is a submarine capable of deploying submarine-launched ballistic missiles (SLBMs) with nuclear warheads. These submarines became a major weapon system in the Cold War because of their nuclear deterrence capability. They can fire missiles thousands of kilometers from their targets, and acoustic quieting makes them difficult to detect, thus making them a survivable deterrent in the event of a first strike and a key element of the mutual assured destruction policy of nuclear deterrence. The deployment of ballistic missile submarines is dominated by the United States and Russia. Smaller numbers are in service with France, the United Kingdom, China and India; North Korea is also suspected to have an experimental submarine that is diesel-electric powered.
USS Ohio (SSBN-726/SSGN-726), the lead boat of her class of nuclear-powered fleet ballistic missile submarines (SSBN), is the fourth vessel of the United States Navy to be named for the U.S. state of Ohio. She was commissioned with the hull designation of SSBN-726, and with her conversion to a guided missile submarine she was re-designated SSGN-726.
USS Louisiana (SSBN-743) is the 18th and last ship of the United States Navy's Ohio class of nuclear-powered fleet ballistic missile submarines. She carries Trident ballistic missiles and has been in commission since 1997. She is the fourth commissioned ship to bear the name of the U.S. state of Louisiana.
Three ships of the United States Navy have been named USS Michigan in honor of the 26th state.
USS Maine (SSBN-741) is a United States Navy Ohio-class ballistic missile submarine in commission since 1995. She is the fourth U.S. Navy ship authorized, and the third commissioned, to be named in honor of the state of Maine. She has the capability to carry 24 nuclear armed Trident ballistic missiles.
The George Washington class was a class of nuclear-powered ballistic missile submarines deployed by the United States Navy. George Washington, along with the later Ethan Allen, Lafayette, James Madison, and Benjamin Franklin classes, comprised the "41 for Freedom" group of submarines that represented the Navy's main contribution to the nuclear deterrent force through the late 1980s.
A cruise missile submarine is a submarine that carries and launches cruise missiles as its primary armament. Missiles greatly enhance a warship's ability to attack surface combatants and strike land targets; although torpedoes are a more discrete option for submerged submarines, missiles give a much longer stand-off range, shorter time to impact the target, as well as the ability to engage multiple targets on different headings at the same time. Many cruise missile submarines retain the capability to deploy nuclear warheads on their missiles, but they are considered distinct from ballistic missile submarines due to the substantial differences between the two weapons systems' flight characteristics; cruise missiles fly aerodynamically using flight surfaces like wings or fins, while a ballistic missile uses its engine power alone as it may exit the atmosphere.
USS Georgia (SSBN-729/SSGN-729), an Ohio-class submarine, is the second vessel of the United States Navy to be named for the U.S. state of Georgia.
USS Alabama (SSBN-731) is the sixth Ohio-class nuclear-powered ballistic missile submarine, and the seventh United States vessel to be named for the state of Alabama. The boat's motto duplicates the state's motto, Audemus Jura Nostra Defendere.
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed. Nuclear submarines have considerable performance advantages over "conventional" submarines. Nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for conventional submarines. The large amount of power generated by a nuclear reactor allows nuclear submarines to operate at high speed for long periods, and the long interval between refuelings grants a range virtually unlimited, making the only limits on voyage times being imposed by such factors as the need to restock food or other consumables.
USS Florida (SSBN-728/SSGN-728), an Ohio-class cruise missile submarine, is the sixth vessel of the United States Navy to be named for the U.S. state of Florida. She was commissioned with the hull designation of SSBN-728; with her conversion to a cruise missile submarine, from a ballistic missile submarine, she was re-designated SSGN-728.
USS Kentucky (SSBN-737) is a United States Navy Ohio-class ballistic missile submarine which has been in commission since 1991. She is the third U.S. Navy ship to be named for Kentucky, the 15th state.
USS Wyoming (SSBN-742) is a United States Navy Ohio-class ballistic missile submarine which has been in commission since 1996. She is the fourth US Navy ship to be named USS Wyoming, although it was only the third named after the state of Wyoming.
USS Alaska (SSBN-732), is a United States Navy Ohio-class ballistic missile submarine which has been in commission since 1986. She is the fourth US Navy ship to be named for the Territory or State of Alaska.
Naval Submarine Base Kings Bay is a base of the United States Navy located adjacent to the city of St. Marys in Camden County, Georgia, on the East River in southeastern Georgia, and 38 miles (61 km) from Jacksonville, Florida. The Submarine Base is the U.S. Atlantic Fleet's home port for U.S. Navy Fleet ballistic missile nuclear submarines capable of being armed with Trident missile nuclear weapons. This submarine base covers about 16,000 acres of land, of which 4,000 acres are protected wetlands.
There are three major types of submarines in the United States Navy: ballistic missile submarines, attack submarines, and cruise missile submarines. All submarines currently in the U.S. Navy are nuclear-powered. Ballistic missile submarines have a single strategic mission of carrying nuclear submarine-launched ballistic missiles. Attack submarines have several tactical missions, including sinking ships and subs, launching cruise missiles, and gathering intelligence. Cruise missile submarines perform many of the same missions as attack submarines, but with a focus on their ability to carry and launch larger quantities of cruise missiles than typical attack submarines.
The Commander, Submarine Force, U.S. Pacific Fleet (COMSUBPAC) is the principal advisor to the Commander, United States Pacific Fleet (COMPACFLT) for submarine matters. The Pacific Submarine Force (SUBPAC) includes attack, ballistic missile and auxiliary submarines, submarine tenders, floating submarine docks, deep submergence vehicles and submarine rescue vehicles throughout the Pacific.
The Columbia-class is an upcoming class of nuclear-powered ballistic missile submarines designed to replace the Ohio class of the United States Navy. Construction of the first submarine began on 1 October 2020. It is scheduled to enter service in 2031.
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