Arco (ARDM-5) is an ARDM-5-class Medium Auxiliary floating drydock for repair and serviced the United States Navy.

Los Angeles-class submarine USS Asheville (SSN-758) enters the floating dry dock Arco (ARDM-5) for scheduled maintenance in 2007.
History
United States
Namesake	Arco, Idaho
Operator	United States Navy
Awarded	13 October 1982
Builder	Todd Pacific Shipyards
Laid down	9 May 1983
Launched	14 December 1984
In service	23 June 1986
Homeport	San Diego, California
Motto	Our Hands Preserve
Honors and awards	National Defense Service Medal Navy E Ribbon (Awarded 17 times)
Status	Active
Badge
General characteristics
Class and type	ARDM-5-class
Displacement	5,400 tons
Length	492 ft (150 m)
Beam	96 ft (29 m)
Height	61 ft (19 m)
Complement	5 officer, 125 enlisted

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 provides dry dock services for the nuclear-powered submarines of Submarine Squadron Eleven in the Pacific, as well as other small craft.