Arco (ARDM-5) is an ARDM-5 class Medium Auxiliary Repair Dry Dock in the service of the United States Navy. Arco was laid down on 9 May 1983 by Todd Pacific Shipyards in Seattle, Washington, and launched on 14 December 1984. She was placed in service on 23 June 1986 at Naval Base San Diego. She services the nuclear-powered submarines of Submarine Squadron Eleven in the Pacific, as well as other small craft.