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The new Navy Columbia-Class SSBNs will be the largest submarines ever built by the United States. Each of the planned dozen boats will be 560 feet in length and have a beam of 43 feet. ....
Beginning in 2031, the U.S. Navy will replace each of the retiring Ohio-class subs with a new Columbia-class SSBN. The program's goal is to build a dozen of the new nuclear-powered submarines, and those boats will continue to support the U.S. strategic deterrent mission. ....
The US Navy needs new SSBN nuclear missile submarines. Their existing Ohio Class boats will begin to retire at a rate of 1 hull per year, beginning in 2027, as they reach the end of their 42-year operational lifetimes. Hence SSBN-X, also known as the ....