The Navy's four shipyards have experienced significant delays—sometimes as long as several years—in completing maintenance on submarines. In response to those delays, the Navy has sent several submarines to private shipyards for maintenance in recent years. It has also increased the number of workers at its shipyards and taken steps to improve productivity.
CBO finds that maintenance delays will continue despite those changes. It projects that required maintenance will exceed the capacity of the Navy's shipyards in 25 of the next 30 years.