ProtectedSubmarines Long repair time for US N-sub By ANI - June 23, 2023 0 208 Seawolf class USS Connecticut A US Navy nuclear-powered submarine that ran into an underwater mountain while transiting the South China Sea in 2021 will be out of service for at least a few more years while it awaits repairs, Heromag reports. Please Login to view this content. (Not a member? Join Today!)