The upcoming Columbia class (formerly known as the Ohio Replacement Submarine and SSBN-X Future Follow-on Submarine) are nuclear-powered ballistic missile submarines of the United States Navy, designed to replace the Ohio class. Construction of the first vessel began on 1 October 2020, and is scheduled to enter service in 2031.
The upcoming Columbia class (formerly known as the Ohio Replacement Submarine and SSBN-X Future Follow-on Submarine) are nuclear-powered ballistic missile submarines of the United States Navy, designed to replace the Ohio class. Construction of the first vessel began on 1 October 2020, and is scheduled to enter service in 2031.
Source: Wikipedia "Columbia-class submarine" · CC BY-SA 4.0
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