Columbia-class submarine

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.
On 3 June 2022, the Navy announced that the lead vessel of the class will be named USS District of Columbia (SSBN-826), because there is already an attack submarine named USS Columbia (SSN-771). Nevertheless, the Navy has since continued to refer to the class as Columbia.