The proposed US Navy (USN) fiscal year (FY) 2021 budget includes the procurement of the first Columbia-class nuclear-powered ballistic submarine (SSBN) force as the service moves forward with its programme to build the submarines to replace its Ohio-class boats.
Previously, the USN had included only advanced procurement funding for the Columbia-class boats.
The FY 2021 request of USD4 billion provides for the first three years of incremental funding for the boat, according to USN budget documents released on 10 February. The funding will continue detailed-design efforts, continuous missile-tube production and advance construction, and procurement of major hull components and propulsion systems for the planned FY 2024 procurement of the second of class.
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