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Columbia-class submarine

The Columbia-class (formerly known as the Ohio Replacement Submarine and SSBN-X Future Follow-on Submarine) is an upcoming class of nuclear-powered ballistic missile submarines designed to replace the Ohio class of the United States Navy.[7] Construction of the first submarine began on 1 October 2020.[8] It is scheduled to enter service in 2031.[9][10][11]

On 3 June 2022, the Navy announced that this first boat will be named USS District of Columbia (SSBN-826), because there currently exists an attack submarine named USS Columbia (SSN-771).[12] The Navy has since continued to refer to the class as the Columbia class.[13][14]

Expected 42-year service life, including 124 deterrent patrols.

[35]

that will power the submarine for its entire expected service life, unlike the Ohio-class submarines, which require a mid-life nuclear refueling.[20]

Nuclear fuel core

Missile launch tubes that are the same size as those of the Ohio class, with a diameter of 87 inches (2,200 mm) and a height sufficient to accommodate a D-5 Trident II missile.

Beam at least as great as the 42-foot (13 m) beam of the Ohio-class submarines

16 missile launch tubes instead of 24 missile launch tubes on Ohio-class submarines.[36][37][38]

[5]

Although the SSBN(X) is to have fewer launch tubes than the Ohio-class submarine, SSBN(X) is expected to have a submerged displacement about the same as that of Ohio-class submarines

Breckenridge, Richard (22 June 2013). . NavyLive. Retrieved 27 June 2013.

"Facts We Can Agree Upon About Design of Ohio Replacement SSBN"

O'Rourke, Ronald (17 September 2017). (PDF). Congressional Research Service. R41129. Retrieved 23 September 2017 – via Federation of American Scientists.

"Navy Navy SSBN(X) Ballistic Missile Submarine Program: Background and Issues for Congress"

Thompson, Loren (20 June 2011). . Forbes. Archived from the original on 25 June 2011. Retrieved 23 June 2011.

"The Submarine That Might Save America"

– United States Naval Institute

Ohio-class Replacement Program

article with video by Defense One

"3 Questions: America’s Next Nuclear-Missile Submarine"