Auxiliary repair dock

An Auxiliary repair dock (ARD) is a type of vessel employed by the U.S. Navy, especially during World War II, when it commissioned 33 ARD vessels: ARD-1 to ARD-33. ARDs were self-sustaining in World War 2. ARD have a rudder to help in tow moving, making ARDs very mobile. ARD have a bow to cut though waves. ARDs have a stern that could be opened or closed. The stern could be closed with bottom-hinged flap gate, that was operated by hydraulic rams. This stern gate could lowered for ship entrance into the submerged dock and then closed to keep out wave. They were built by the Pacific Bridge Company, in Alameda, California.

USS ARD-1 under tow by USS Bridge 28 October 1934.
ARD6DutchHarborAK S46
ARD-6 submerged at Dutch Harbor Alaska with Sub USS S-46 for repair 1944
ARD29 floating repair dry dock
USS Arco (ARD-29) a land drydocked at Naval Shipyard Pearl Harbor in Drydock Number Four for repairs in April 1951.
Alamogordo (ARDM-2)
USS Alamogordo (ARDM-2) at anchor on the Cooper River, Charleston, SC

Primary use

The Auxiliary repair dock was a type Auxiliary floating drydock a type of floating drydock, which could, by design, provide drydock facility to damaged Navy vessels. Floating drydocks of this type were approximately 500-foot (150 m) long and weighted about 5,000 tons. The first Auxiliary repair dock was the USS ARD-1 built by the Pacific Bridge Company and completed in September 1934. ARD-1 was 2200 tons, 393 ft 6 in (119.94 m) long and could lift 2200 tons. ARD-1 was so successful that 30 ARDs docks where built, most completed between 1942 and 1944. ARD-2 and the next five ARD docks were larger at 3500 tons. and 485'8" (148.0m) long. ARD-1 was taken to a forward Naval base at Kerama Retto, Okinawa Island, to repair the many ships damaged by kamikaze attacks. ARD-1 made many temporarily repairs to get ships back into action. Many other ARDs joined ARD-1 in this important task. This minimized the time ships were out of action for repairs.[1][2][3][4][5][6]

Drydock facility

Floating drydocks, of this and other types, were capable of flooding themselves, opening up a bow door to permit a damaged vessel to enter. Once the damaged vessel was within the bounds of the floating drydock, and the door was closed, the water was pumped out of the floating drydock, permitting repair work to be performed on the damaged vessel. Such work in battle areas was often of a temporary nature, primarily to return the damaged vessel to seaworthy condition.

Once the damaged vessel was sufficiently repaired, the floating drydock was flooded, the door opened, and the repaired vessel allowed to depart for further duty or assignment.

Personnel capabilities

While the damaged vessel was being repaired, the drydock was capable of providing the crew of the damaged ship with temporary necessities, such as meals, laundry, some supplies, and, in a limited number of cases, berthing for crew members. (When possible, the crew of the damaged ship remained on their ship while structural repair was being accomplished.)

Ships in class

See also


  1. ^ Popular Science Feb 1937, page 43
  2. ^ HyperWar: US navy, Building the Navy's Bases in World War II Chapter IX Floating Drydocks, page 209
  3. ^ The Pacific War Online Encyclopedia, Floating Dry Docks
  4. ^ Bureau of Ships Journal, Volume 1, May 1953, page 4.
  5. ^, Wayne Loyd Chute
  6. ^ navsource, USS ARD-1
  7. ^ navsource, USS ARD-1
  8. ^ navsource, USS ARD-2
  9. ^ navsource, USS ARD-3
  10. ^ navsource, USS ARD-4
  11. ^ navsource, USS ARD-5
  12. ^ navsource, USS ARD-6
  13. ^ USS ARD-7
  14. ^ navsource, USS ARD-8
  15. ^ navsource, ARD-9
  16. ^ navsource, ARD-10
  17. ^ navsource, ARD-11
  18. ^ ARD-12
  19. ^ ARD-13
  20. ^ navsource, USS ARD-14
  21. ^ USS ARD-15
  22. ^ navsource, USS ARD-16
  23. ^ USS ARD-17
  24. ^ navsource, USS Endurance ARD-18 ARDM 3
  25. ^ USS Oak Ridge (ARDM-1) ARD-19
  26. ^ navsource, USS White Sands (ARD-20)
  27. ^ navsource, USS ARD-21
  28. ^ navsource, USS ARD-22 Windsor
  29. ^ navsource, USS ARD-23
  30. ^ USS ARD-24
  31. ^ USS ARD-25
  32. ^ navsource, USS Alamogordo (ARDM-2) ARD-26
  33. ^ USS ARD-27
  34. ^ navsource, USS ARD-28
  35. ^ USS Arco (ARD-29)
  36. ^ navsource, USS ARD-30, USS San Onfre
  37. ^ navsource, USS ARD-31
  38. ^ navsource, USS ARD-32
  39. ^ navsource, USS ARD-33 - AFDL 47, Reliance

The abbreviation ARDC may refer to:

Air Research and Development Command, later renamed the Air Force Systems Command

Amateur Radio Digital Communications, a mode using IP addresses beginning with 44.x

American Racing Drivers Club, a midget car racing sanctioning body in the East Coast of the United States

American Research and Development Corporation, an early venture capital investment firm founded in 1946

Attorney Registration and Disciplinary Commission, professional administrative entity that governs licensing and disciplinary actions for attorneys licensed to practice in the state of Illinois

Auxiliary Repair Dock, Concrete of the US Navy

Australian Research Data Commons, an initiative for research data in Australia

Amenities ship

An amenities ship is a ship outfitted with recreational facilities as part of a mobile naval base. Amenities ships included movie theaters and canteens staffed by mercantile crews of the Royal Fleet Auxiliary service. These ships were intended to provide a place where British Pacific Fleet personnel could relax between operations.

Auxiliary floating drydock

Auxiliary floating drydock are US Navy floating dry docks that are able to submerge under water and be placed under a ship in need of repair below the water line. Floating drydocks then rise up under the ship raising the ship out of the water. The ship is now blocked on the deck of the floating dry dock for repair. Most floating drydocks had no engine and are towed by tugboats to locations. Floating dry docks come in a different sizes to accommodate varying ship sizes. The large floating drydocks come in sections and can be assembled together to increase the size and lift power. Ballast pontoons tanks are flooded with water to submerge or pumped dry to raise the ship.

Coastal minesweeper

Coastal minesweeper is a term used by the United States Navy to indicate a minesweeper intended for coastal use as opposed to participating in fleet operations at sea.

Because of its small size—usually less than 100 feet in length—and construction—wood as opposed to steel—and slow speed—usually about 9 or 10 knots—the coastal minesweeper was considered too fragile and slow to operate on the high seas with the fleet.

Minesweeping, in conjunction with fleet activities, was usually relegated to the diesel-driven steel-hulled AM-type minesweepers, later to be replaced by the wood-hulled MSO-type minesweeper with aluminum engines.

Coastal submarine

A coastal submarine or littoral submarine is a small, maneuverable submarine with shallow draft well suited to navigation of coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than midget submarines, but smaller than sea-going submarines designed for longer patrols on the open ocean. Space limitations aboard coastal submarines restrict fuel availability for distant travel, food availability for extended patrol duration, and number of weapons carried. Within those limitations, however, coastal submarines may be able to reach areas inaccessible to larger submarines, and be more difficult to detect.

General stores issue ship

General stores issue ship is a type of ship used by the United States Navy during World War II and for some time afterwards.

The task of the general stores issue ship was to sail into non-combat, or rear, areas and disburse general stores, such as canned goods, toilet paper, office supplies, etc., to ships and stations.

Guard ship

A guard ship is a warship assigned as a stationary guard in a port or harbour, as opposed to a coastal patrol boat which serves its protective role at sea.

Light aircraft carrier

A light aircraft carrier, or light fleet carrier, is an aircraft carrier that is smaller than the standard carriers of a navy. The precise definition of the type varies by country; light carriers typically have a complement of aircraft only one-half to two-thirds the size of a full-sized fleet carrier. A light carrier was similar in concept to an escort carrier in most respects, however light carriers were intended for higher speeds to be deployed alongside fleet carriers, while escort carriers usually defended convoys and provided air support during amphibious operations.

Mine countermeasures vessel

A mine countermeasures vessel or MCMV is a type of naval ship designed for the location of and destruction of naval mines which combines the role of a minesweeper and minehunter in one hull. The term MCMV is also applied collectively to minehunters and minesweepers.


A minehunter is a naval vessel that seeks, detects, and destroys individual naval mines. Minesweepers, on the other hand, clear mined areas as a whole, without prior detection of mines. A vessel that combines both of these roles is known as a mine countermeasures vessel (MCMV).

Ocean boarding vessel

Ocean boarding vessels (OBVs) were merchant ships taken over by the Royal Navy for the purpose of enforcing wartime blockades by intercepting and boarding foreign vessels.

Repair ship

A repair ship is a naval auxiliary ship designed to provide maintenance support to warships. Repair ships provide similar services to destroyer, submarine and seaplane tenders or depot ships, but may offer a broader range of repair capability including equipment and personnel for repair of more significant machinery failures or battle damage.

Submarine tender

A submarine tender is a type of depot ship that supplies and supports submarines.


USS ARD-1 was an auxiliary repair dock serving with the United States Navy during World War II as Auxiliary floating drydock. ARD-1 was built by the Pacific Bridge Company and completed in September 1934. ARD-1 was commissioned at Alameda, California on 19 December 1935 then towed to San Diego, California. ARD-1 was the first in her class of self-sustaining, ship hull shape ship repair docks. ARD-1 was able to repair ships in a Naval fleet in remote locations. Lieutenant commander Charles M. Johnson was the first in command of ARD-1.


USS ARD-10 was an auxiliary repair dock in the service of the United States Navy in World War II as an Auxiliary floating drydock, built by Pacific Bridge Company. As was common with other auxiliary repair docks, the ship was only known by her designation and was not otherwise named.

ARD-10 was commissioned in Alameda, California in October 1943. She was towed by Yuma from San Francisco, California on 12 December 1943 first to Sydney, Australia and then on to Melbourne on 1 February 1944. Yuma and ARD-10 finally arrived at Fremantle, Western Australia, on 6 March 1944. There ARD-10 served the submarine base until end of the war.

ARD-10 returned to the United States after in 1946. She was stricken from US Navy service in July 1972 and subsequently sold to Bendershipbuilding Repair Co. of Mexico. As of 6 February 2013 the ship was still operational.

ARD-10 was a member of the ARD-2 class of Auxiliary Repair Drydocks (ARD). The ARD-2 class of drydocks dates to early World War II and were towed to where they were required, generally forward area anchorages. Five of the 7 ARD-2-class drydocks built are still in existence in foreign navies. The 486-foot-long (148 m) ARD could handle World War II-era ships up to destroyer size.


USS ARD-9 was an auxiliary repair dock serving with the United States Navy during World War II as Auxiliary floating drydock. Built by the Pacific Bridge Company.

ARD-9 was commissioned at Alameda, California on 25 September 1943, towed to San Francisco Bay, and anchored near the Floating Drydock Training Center at Tiburon, California. She had 5 dockings before leaving the United States.

ARD-9 left the US on 12 December 1943 in a convoy of 5 ships: An AK ship, the Navy tug USS Yuma towing the USS ARD-10, and the Metamora, a Merchant Marine tug towing the ARD-9. At sea, the ship headed SSW and crossed the equator at 151 degrees and 50 minutes. She was 56 days at sea without seeing land. As the convoy entered the Coral Sea it was given an escort by an Australian corvette. The ARD-10 then left the convoy and went on to Perth. ARD-9 anchored in Milne Bay, New Guinea on 6 February 1944.

She was sold to the Republic of China in 1976, where she served as Wo Fu (ARDS-5).

USS Arapaho (ATF-68)

USS Arapaho (AT-68/ATF-68) was a Navajo-class fleet ocean tug which served the U.S. Navy during World War II with her towing services. She was assigned initially to support the U.S. Atlantic Fleet, and was eventually assigned to support Allied forces in the war zones of the Pacific Ocean, resulting in her crew returning home after the war with four battle stars to their credit.

USS Arco (ARD-29)

USS ARD-29 was an auxiliary repair dock that served with the United States Navy during World War II as an Auxiliary floating drydock. In 1967, the ship was renamed Arco and in the 1970s, the vessel was first loaned then sold to Iran.

USS White Sands (ARD-20)

USS White Sands (ARD-20), ex-USS ARD-20, ex-USS ARD(BS)-20, later AGDS-1, was a United States Navy auxiliary repair dock in service from 1944 to 1947 and from 1966 to 1974 and an Auxiliary floating drydock.

Auxiliary repair docks of the United States Navy
ARD-2 class
ARD-12 class
ARDM-1 class
Aircraft carriers
Patrol craft
Fast attack craft
Mine warfare
Command and support
United States naval ship classes of World War II
Aircraft carriers
Light aircraft carriers
Escort carriers
Large cruisers
Heavy cruisers
Light cruisers
Destroyer escorts
Patrol frigates
Patrol boats
Cargo ships
Auxiliary ships


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