page_title: Auxiliary floating drydock
section_title: Auxiliary Repair Docks (ARD)
hierarchical_section_title: Auxiliary floating drydock / Auxiliary Repair Docks (ARD)
caption_attribution_description: English: ARD-6 at Dutch Harbor Alaska with Sub S-46 for repair 1944
context_page_description: 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.
context_section_description: Built by Pacific Bridge Company in Alameda, California, and are 483 feet long, beam of 71 Feet, and draft of 5 Feet. Ship displacement 4,800 tons. Crew complement 6 Officers and 125 Enlisted. Armament of Two single Oerlikon 20 mm cannon. ARD had a crew of 100 to 160 men. ARD have a bow and are sea worthy. They are self-sustaining with a rudders to help in tow moving and have two cranes with a 5-ton capacity. Normal also had stowage barge for extra space. Used to repair destroyers and submarines. Class 2 could repair Landing Ship, Tank (LST). The stern of ship is open to have the ship in need of repair enter.
  USS ARD-1  (displacement of 2200 tons) (Built in 1933) (only one in class)
  USS ARD-2 sold in 1963
  USS ARD-3 sold 1999
  USS ARD-4 sold 1961
  ARD-2-class 410 feet long, 49 feet, 4 inches wide, ARD-5 to 11:
  USS Waterford (ARD-5)
  USS ARD-6 sold 1961
  USS West Milton (ARD-7)  Scrapped in 1992
  USS ARD-8 sold 1961
  USS ARD-9  sold 1977
  USS ARD-10  sold, scrapped in 2014
  USS ARD-11 sold 1977
  ARD-2-class wide: 410 feet long, 49 feet, 4 inches 59 feet, 3 inches wide, ARD 12 to 32:
  USS ARD-12 sold 1987
  USS ARD-13 sold 1977
  USS ARD-14 sold 1980
  USS ARD-15 sold 1971
  USS ARD-16 by Pacific Bridge, sold moved to Mobile AL
  USS ARD-17 sold 1971
  USS Endurance ARD-18 ARDM 3, laid up at Charleston Naval Shipyard
  USS Oak Ridge ARD-19 ARDM 1, to United States Coast Guard in 2002
  USS White Sands ARD-20 by Pacific Bridge Co., (changed to AGDS-1), sold 1974
  USS ARD-21 reserve
  USS Windsor (ARD-22) sold 1976
  USS ARD-23 sold 1992
  USS ARD-24 sold 1982
  USS ARD-25 sold 1973
  USS Alamogordo ARD-26   sold 2000
  USS ARD-27 Scrapped in 1974
  USS ARD-28 sold renamed  Capitan Rodriguez Zamora
  USS Arco ARD-29 sold to Iran 1971
  USS San Onfre (ARD-30) by Pacific Bridge Co.
  USS ARD-31 To US Air Force in 1974
  USS ARD-32 sold 1960
  USS ARD-33 (By Dravo Corp.) renamed AFDL 47  Reliance
caption: ARD-6 submerged at Dutch Harbor Alaska with Sub USS S-46 for repair 1944
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