San Clemente-class oil tanker

USNS Mercy leaving San Diego Bay, May 2008, built as SS Worth in 1974, converted to Mercy in 1984.
Class overview
Builders	National Steel and Shipbuilding Company
Subclasses	T-AH-19
Built	1974-1978
Completed	13
General characteristics
Type	Oil tanker - two Hospital ships
Tonnage	89,700 dwt
Length	894 ft (272 m)
Beam	105 ft (32 m)
Draft	64 ft 6 in (19.66 m)
Propulsion	Steam, 24,500 bhp (18,300 kW)
Speed	16.5 knots (30.6 km/h; 19.0 mph) at 90% MCR, Full Load
Capacity	32,5000 Cu feet
Crew	21 (Hospital ship 1,000)

The San Clemente-class oil tanker is a class of oil tankers built by National Steel and Shipbuilding Company (NASSCO), San Diego. The size places them in the category of super tankers. They were built to serve the Trans-Alaska Pipeline System. At the time of completion National Steel and Shipbuilding Company was equally owned by Kaiser Industries Corporation and Morrison-Knudsen Company, Inc.

NASSCO also built the San Diego-class tankers at 180,000-dwt, Catalina-class tankers at 150,000- dwt and the Coronado-class tankers at 38,300-dwt. NASSCO also built for the US Navy Yellowstone-class destroyer tender (AD-41 class) at 19,800-ton each.^[1][2]

Two ships were converted by NASSCO to T-AH-19 hospital ships. The two hospital ships were delivered to the US Navy in 1986 and 1987 as Naval Auxiliary Fleet ships. The two provided for the Navy deployable acute medical care facility. Each has 1,000-bed medical care unit. They are used for armed forces and mercy missions to damaged locations, like after a typhoon.^{[3][4][5][6][7][8]}