Naval Station Mayport is a major United States Navy base in Jacksonville, Florida. It contains a protected harbor that can accommodate aircraft carrier-size vessels, ship's intermediate maintenance activity (SIMA) and a military airfield (Admiral David L. McDonald Field) with one asphalt paved runway (5/23) measuring 8,001 × 200 ft. (2,439 × 61 m). Naval Station Mayport is also home to the Navy's United States Fourth Fleet, reactivated in 2008 after being deactivated in 1950. A 2013 report from the USN revealed that they are considering basing as many as 14 Littoral combat ships at Mayport.