Naval Air Station Whidbey Island (NASWI) is a naval air station of the United States Navy located on two pieces of land near Oak Harbor, on Whidbey Island, in Island County, Washington. The main portion of the base, Ault Field, is about three miles north of Oak Harbor. The other section, called the Seaplane Base for the PBY Catalina flying boats once based there, holds most of the island's Navy housing as well as the air station's main Navy Exchange and DeCA Commissary.