
A new Government Accountability Office (GAO) report to Congress found that several technologies for the Columbia-class submarine program need more development and testing to prevent cost and schedule delays that could delay deployment of the lead submarine beyond a 2031 deadline.Twelve Columbia-class ballistic missile submarines (SSBNs) are planned to replace the existing 14 Ohio-class vessels that provide the sea leg in the U.S. nuclear weapons triad. The Ohio-class submarines are scheduled to begin retiring in 2027 and the first Columbia-class unit…