Naval Support Activity (NSA) Annapolis is located across the Severn River from the US Naval Academy and is charged with delivering base operating support services to tenant commands. These include the United States Naval Academy, North Severn complex, Chesapeake Bay Detachment in Randle Cliff, MD, and Navy Operational Support Center in Baltimore, MD. NSA Annapolis includes over 1,500 acres and more than 400 buildings.