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The upcoming Columbia-class (formerly known as the Ohio Replacement Submarine and SSBN-X Future Follow-on Submarine) nuclear-powered ballistic missile submarines of the United States Navy are designed to replace the Ohio class. [7] Construction of the first vessel began on 1 October 2020. [8] She is scheduled to enter service in 2031. [9] [10] [11]
The 12 ballistic missile submarines of the Columbia class will perform deterrent patrols, the naval leg of the U.S. nuclear triad. They will replace the Ohio class, whose submarines are to be decommissioned, one per year, beginning in 2027. [6] District of Columbia will replace an as-yet-unannounced Ohio.
Note: Several boats were converted into cruise missile submarines after construction, the USS Halibut was the only purpose built SSGN of the US Navy Class Name No. First boat laid down Last boat commissioned Notes Picture/Silhouette Halibut: 1 11 April 1957 4 January 1960 Unique submarine; Regulus missile submarine
USS Wisconsin (SSBN-827) will be the second Columbia-class ballistic missile submarine. She is the third vessel of the United States Navy to be named after the state of Wisconsin. [2] The previous name holder was the Iowa-class battleship USS Wisconsin (BB-64), which decommissioned in 1991 and stricken from the Naval Vessel Register in 2006. [3]
The U.S. has 18 Ohio-class submarines, of which 14 are Trident II ballistic missile submarines (SSBNs), each capable of carrying 24 submarine-launched ballistic missiles (SLBMs), although to comply with the START II treaty, 4 of the missile launch tubes have been disabled.
20 × Trident II D-5 ballistic missiles USS Pennsylvania (SSBN-735) is a nuclear -powered, United States Navy Ohio -class ballistic missile submarine that has been in commission since 1989. She is the fourth ship of the United States Navy to be named for the Commonwealth of Pennsylvania .
The delays facing the Columbia class could mean the Navy won't meet its requirement of having 10 ballistic missile subs ready to deploy at all times. Future Columbia-class submarines have been a ...
The Ohio class was designed in the 1970s to carry the concurrently designed Trident submarine-launched ballistic missile. The first eight Ohio-class submarines were armed at first with 24 Trident I C4 SLBMs. [6] Beginning with the ninth Trident submarine, Tennessee, the remaining boats were equipped with the larger, three-stage Trident II D5 ...