Maintenance backlogs for U.S. Navy attack submarines have cost the service $3.4 billion over the past decade while leaving crews idle and boats uncertified for deployment. Between 2016 and 2025, delays resulted in 15,000 lost operational days, including "active idle time" where fully-crewed submarines remain pier-side due to expired certifications. For Los Angeles-class subs, this costs nearly $220,000 per day, while Virginia-class boats incur over $237,000 daily.
The problem extends to decommissioning delays, where nuclear submarines wait years for shipyard slots to defuel reactors. One example is the USS Pasadena, inactive since January 2025 and not expected to enter Norfolk Naval Shipyard until November 2028. These "inactive idle" periods cost an estimated $300 million per delayed sub. GAO warns that inactive idle time will grow to 14,000 days and $3.1 billion in costs between 2026 and 2030 if trends continue.
Navy officials are exploring options like defueling reactors pier-side or using floating dry docks, but lack detailed feasibility studies. Expanding shipyard capacity remains the most viable long-term solution, though revitalization efforts could take years. The Navy is also considering transferring crews to active boats during delays, but shipyard limitations persist.
