In which year was this military base established that functioned as a World War II armament storage depot and is located near Seal Islands?
Seal Islands (California) Seal Islands are a pair of islands in Suisun Bay at the mouth of the Sacramento-San Joaquin River Delta in Contra Costa County, California, 10 km east of Benicia, and 500 metres off-shore from the former Concord Naval Weapons Station and Port Chicago Naval Magazine.
USS Sea Otter II (IX-53) USS "Sea Otter II" was a ship of the United States Navy during World War II. Launched on 23 August 1941 by the Levingston Shipbuilding in Orange, Texas., sponsored by Mrs. Eads Johnson, wife of the designer, she was acquired by the US Navy on 26 September 1941 and placed in service on 26 October 1941.