November 19, 2018 – Navy shipyards have been unable to keep up with maintenance demands for attack submarines. As a result, the Navy has spent $1.5 billion since 2008 to support submarines that it could not deploy. For example, the USS Boise has been docked for over 2 years while waiting for maintenance — with the Navy paying to support it. The Navy has begun to hire more workers at its shipyards and, in some cases, has shifted more work to private shipyards. We recommended the Navy assess how to best use public and private shipyards to achieve the full benefit of the nation’s investment in these submarines.