View source for Engineering:Auxiliary floating drydock

{{short description|Type of United States Navy drydocks}}
[[File:USS Artisan ABSD-1 01.jpg|right|thumb|USS ''Artisan'' (ABSD-1) with {{USS|Antelope|IX-109}} and ''LST-120'' in the dock at Espiritu Santo, New Hebrides Islands, 8 January 1945]]
[[Image:USS Los Alamos (AFDB-7).JPEG|thumb|right|{{ship||Los Alamos|AFDB-7}}, with a repaired submarine at Holy Loch, Scotland in 1985]]
[[Image:YFD-2 arriving Pearl Harbor Oct 1940.jpg|right|thumb|YFD-2 The first Yard Floating Dock built in 1901, arriving Pearl Harbor 23 October 1940 from New Orleans Naval Yard]]
[[File:USS Pennsylvania (ACR-4) in Drydock Dewey.jpg|thumb|right|USS ''Pennsylvania'' in drydock USS ''Dewey'', the second YFD, c. 1906–1907]]
An '''auxiliary floating drydock''' is a type of US Navy auxiliary [[Engineering:Dry dock#Floating|floating]] [[Engineering:Dry dock|dry dock]]. Floating dry docks are able to submerge underwater and to be placed under a ship in need of repair below the water line. Water is then pumped out of the floating dry dock, raising the ship out of the water. The ship becomes blocked on the deck of the floating dry dock for repair. Most floating dry docks have no engine and are towed by [[Engineering:Tugboat|tugboat]]s to their destinations. Floating dry docks come in different sizes to accommodate varying ship sizes, while large floating dry docks come in sections and can be combined to increase their size and lift power. [[Engineering:Ballast tank|Ballast]] pontoon [[Engineering:Water tank|tanks]] are flooded with water to [[Earth:Underwater|submerge]] or pumped dry to raise the ship.<ref>[http://pwencycl.kgbudge.com/F/l/Floating_Dry_Docks.htm The Pacific War Online Encyclopedia, Floating Dry Docks]</ref><ref name="NavyBases">[https://www.ibiblio.org/hyperwar/USN/Building_Bases/bases-9.html Building the Navy's Bases in World War II, History of the Bureau of Yards and Docks and the Civil Engineer Corps 1940-1946 Chapter IX, Floating Drydocks]</ref>

==World War II==
At the start of [[Social:World War II|World War II]], the US Navy had only three steel [[Engineering:Auxiliary ship|auxiliary]] floating dry docks:
{{ordered list|type=lower-roman
|Auxiliary floating drydock YFD-2, built in 1901, was at Pearl Harbor. YFD-2 was repairing the US destroyer USS ''Shaw'' on 7 December 1941 during the attack on the harbor. Both YFD-2 and USS ''Shaw'' were repaired, after being hit and damaged in the attack.<ref name="Yard Floating Dock (YFD)">[http://www.navsource.org/archives/14/0702.htm navsource, YFD-2]</ref>
|The auxiliary floating drydock USS ''Dewey'', built in 1905, was scuttled at Mariveles to prevent its capture by the {{wipe|Japan}}ese. In 1942 Japan raised the ''Dewey'', but it was resunk by US forces. 
|Auxiliary floating dry dock USS ''ARD-1'', built in 1933, was also at Pearl Harbor. USS ''ARD-1'' was a self-sustaining mobile dry dock.
}}
To reduce travel time for repair work, over 150 auxiliary floating dry docks of different sizes were built during World War II between 1942 and 1945. These newly built floating dry docks had a lift capacity of 400 to 100,000 tons. Without these forward repair bases, ships would have had to return to the US for repairs. Between 1 October 1944 and 17 October 1945, 7,000 ships were repaired in auxiliary floating dry docks. After World War II some auxiliary floating dry docks were sold for private use and others were scrapped. In addition to auxiliary floating dry docks, timber floating dry docks were built for use in World War II. Timber floating dry docks had a lift capacity of 400 to 20,000 tons. They were not towed across the open ocean and were not given a US Navy class.<ref name="shiphistory">{{cite web|url=http://www.shipbuildinghistory.com/smallships/auxafd.htm|title=Floating Dry-Docks (AFDB, AFDM, AFDL, ARD, ARDM, YFD)|date=30 April 2015|publisher=shipbuildinghistory.com|access-date=8 January 2019}}</ref><ref name="NavyBases" />

==Role==
During wartime, ships in continuous use need [[Engineering:Ship repair|repair]] both from wear and from war damage such as from naval mines, kamikaze attacks, dive bombs and torpedoes. [[Engineering:Rudder|Rudder]]s and [[Engineering:Propeller|propeller]]s are best serviced on dry docks. Without remote on-location dry docks, months could be lost if a ship returned to a home port for repair.
Most auxiliary floating drydocks had provisions for the repair crew, including bunk beds, meals, and laundry. Most had [[Chemistry:Power station|power station]]s, [[Engineering:Ballast|ballast]] [[Engineering:Pump|pump]]s, repair shops, machine shops, and mess halls to be self-sustaining. Some auxiliary floating drydocks also had provisions for the ship under repair, but when possible, the crew of the damaged ship remained on ship while repairs were done. Many had [[Engineering:Crane (machine)|cranes]] able to lift tons of material and parts to remove damaged parts and to install new parts.<ref>[http://navy.memorieshop.com/Artisan/index.html USS ABSD-1 &#91;1943-1946&#93;]</ref><ref name="NavyBases" />

==Armament==
Most auxiliary floating drydocks had only anti-aircraft guns for defense, as space would not allow for large guns. Typical armaments included 40 mm and [[Engineering:Oerlikon 20 mm cannon|20 mm]] [[Engineering:Machine gun|machine gun]]s. Japanese pilots sometimes mistook empty auxiliary floating drydocks for [[Engineering:Aircraft carrier|aircraft carrier]]s.<ref>[https://books.google.com/books?id=bCEDAAAAMBAJ&dq=popular+science+July+1946&pg=PA121 "Sea Going Navy Yard Follows The Fleet", November 1945, ''Popular Science'']</ref><ref name="NavyBases" />

==Large Auxiliary Floating Dry Docks (AFDB)==
[[File:USSAFDB-3_USSABSD-3.jpg|thumb|right|USS ''AFDB-3'' with rail traveling 15-ton crane]]
'''Auxiliary Floating Docks, Big''' (AFDB), also known as '''Advance Base Sectional Docks''' (ABSD), came in sections, 93&nbsp;ft long and 3,850 tons each. Each section had a 165-ft beam, a 75-ft molded depth, and 10,000 tons of lifting capacity. Sections could be put together to lift larger ships. AFDB were needed to repair [[Engineering:Battleship|battleship]]s, aircraft carriers, [[Engineering:Cruiser|cruiser]]s, and large auxiliary ships. The AFDB-1 ''Artisan'' had 10 sections (A to J) for a total lift of 100,000 tons, and was 1,000&nbsp;ft long with all 10 sections installed. AFDB-1 to 7 were built between 1943 and 1945 and towed to remote navy bases. An AFDB would have a crew of 600 to 1,000 men, a [[Chemistry:Evaporator (marine)|fresh-water distilling]] plant and was otherwise self-sustaining. They had a rail traveling 15-ton capacity crane with an 85-foot radius and two or more support [[Engineering:Type B ship|barge]]s. To pump water from the tanks, there were two 24-in discharge pumps on each section, each pump rated 15,000 gpm. For electricity, there were two 350-kw diesel AC generators on each section, producing 440 volts 3-phase 60-cycle power. AFDBs had [[Physics:Steam-electric power station|steam plant]]s to run the pumps. Each section could store 65,000 gallons of fuel oil to supply the ships under repair. Crew lived in [[Engineering:Barracks ship|barracks ship]]s, called APL, that docked next to the AFDB.<ref name="shiphistory" /><ref>[http://www.navsource.org/archives/09/28/2801.htm navsource, Artisan (AFDB-1)]</ref><ref name="NavyBases" /><ref>[https://southpacificwwiimuseum.com/wp-content/uploads/2017/05/Unfold-the-Untold-Vol02No03-March-2017.pdf southpacificwwiimuseum.com, ABSD-1 Floating Dry Dock on Espiritu Santo, A glimpse of WWII history]</ref>

* USS ''Artisan'' (ABSD-1) (A-J), built by Everett-Pacific and others
* {{USS|AFDB-2}} (A-J), built by Mare Island Naval Shipyard in Vallejo, California (E, F, H & I in use)<ref>[https://www.pacificwrecks.com/ships/usn/AFDB-2.html pacificwrecks, USS AFDB-2]</ref><ref>https://southpacificwwiimuseum.com/absd/ The USS ABSD-1</ref>
* USS ''AFDB-3'' (A-I), saw fighting action in Guam, and was sold to Croatia in 2000.<ref>[http://www.navsource.org/archives/09/67/6703.htm navsource, USS AFDB-3]</ref><ref>[http://www.navybook.com/nohigherhonor/pic-ffg58repair.shtml Photos of USS ''Samuel B. Roberts'' on blocks in AFDB-3 in 1988]</ref>
* {{USS|AFDB-4}} (A-G), built by Mare Island Naval Ship Yard (NSY). Attacked by air on April 27, 1945. Partially sunk 1989 as a reef.<ref>[https://www.pacificwrecks.com/ships/usn/AFDB-4.html Pacific Wrecks - AFDB-4 / ABSD-4 Auxiliary Floating Dry Dock 4]</ref><ref>[http://www.navsource.org/archives/09/67/6704.htm navsource, navsource, ABSD-4]</ref>
* {{USS|AFDB-5}} (A-G), built by Chicago Bridge in Morgan City, Louisiana. Scrapped in 1997.<ref>[http://www.navsource.org/archives/09/67/6749.htm USS AFDB-5]</ref>
* {{USS|AFDB-6}} (A-G), built by Mare Island NSY. Scrapped 1976.<ref>[http://www.navsource.org/archives/09/67/6706.htm navsource, USS AFDB-6]</ref>
* USS ''Los Alamos'' (AFDB-7) (A-G), built by Chicago Bridge. Sold to a private shipyard in 1995.
'''Post WW2'''
* AFDB-8 ''Machinist'', built by Seebeckwerft in {{wipe|Germany}}. Sold to Guam in 1997.
* AFDB-9 (A-B), built by Sun Shipbuilding in Chester, Pennsylvania. Sold to private owners in Galveston in 1985.

==Medium Auxiliary Floating Dry Docks (AFDM)==
[[File:AFDM-8 Richland.jpg|thumb|right|{{USS|Richland|YFD-64}}]]
[[File:AFDM3centersectionlaterYFD-6floatedPanamaCanal.jpg|thumb|right|YFD-6 center section floated through the Panama Canal on its side. Towed by USS ''Alarka'' (YTB-229) (center) and USS ''Umpqua'' (ATA-209) (left) in 1945. Navy SeaBees turned it on its side with many pontoons to fit through the canal]]
AFDM are from 6,800 to 8,000 tons and are from 528 to 622 feet long. An AFDM has a crew of 140 to 200 men. An AFDM had a lift capacity 18,000 tons and was armed with two 40&nbsp;mm and four 20&nbsp;mm guns. It also had two {{fraction|7|1|2}}-ton cranes with 16 ballast tank compartments. AFDMs were built in three pieces, a long center section and two shorter sections, one at each end.<ref name="shiphistory" /><ref>[http://www.navsource.org/archives/14/04idx.htm navsource, AFDM Medium Auxiliary Floating Dry Dock]</ref><ref name="NavyBases" /><ref>[http://www.navsource.org/archives/14/04idx.htm navsource, Medium Auxiliary Floating Dry Docks (AFDM)]</ref> All AFDM also had Yard Floating Docks (YFD) class numbers.
* USS ''AFDM-1'' Chicago Bridge, YFD 3. Was floated through the Panama Canal on it side, and scrapped in 1986.<ref>[https://ufpcmcollection.wordpress.com/2013/08/11/u-s-n-floating-dry-dock-afdm-1-miraflores-locks/ USN Floating Dry Dock AFDM-1 in the Miraflores Locks, August 11, 2013]</ref>
* {{USS|AFDM-2}} Alabama DD, YFD 4. Sold to private users in 1999.<ref>[http://www.navsource.org/archives/09/28/2802.htm navsource, AFDM-1]</ref>
* USS ''AFDM-3'' Chicago Bridge, through the Panama Canal on it side to Naval Base Trinidad, YFD 6. Sold to private users.<ref>[http://www.navsource.org/archives/09/28/2803.htm navsource, USS AFDM-3]</ref>
* USS ''AFDM-4'' Chicago Bridge, YFD 10. Sold to private users in 1948.
* USS ''Resourceful'' (AFDM-5) Everett-Pacific, YFD 21. Sold to private users in 1999.<ref>[http://www.navsource.org/archives/09/28/7301.htm navsource, USS ''Resourceful'' (AFDM-5)]</ref>
* USS ''Competent'' (AFDM-6) Everett-Pacific, YFD 62. Sold to private users in 1997.<ref>[https://www.globalsecurity.org/military/systems/ship/afdb.htm Global security AFDB Auxiliary Floating Dry Dock, Large]</ref><ref>[http://www.navsource.org/archives/09/28/2806.htm navsource, USS ''Competent'' (AFDM-6)]</ref>
* USS ''Sustain'' (AFDM-7) Everett-Pacific, YFD 63. Leased to BAE Systems Southeast Shipyards in 1997.<ref>[http://www.navsource.org/archives/09/28/2857.htm navsource, USS ''Sustain'' (AFDM-7)]</ref>
* USS ''Richland'' (AFDM-8) Chicago Bridge, YFD 64, scrapped in 2016<ref>[http://www.navsource.org/archives/09/28/2808.htm navsource, USS ''Richland'' (AFDM-8)]</ref>
* USS ''AFDM-9'' Chicago Bridge, YFD 65. Sold to private users in 1989.
* USS ''Resolute'' (AFDM-10) Chicago Bridge, YFD 67. Destroyed in 1947.<ref>[http://www.navsource.org/archives/09/28/2810.htm navsource, USS AFDM-9 ]</ref>
* USS ''AFDM-11'' Chicago Bridge, YFD 68. Sold to private users in 2004.
* USS ''AFDM-12'' – Kaiser Shipyards in Vancouver, Washington, YFD 69. Scrapped in 1990.
* USS ''AFDM-13'' – See YFD 70 Columbia Const. in Vancouver, WA. Sold to private users in 1969.
* USS ''Steadfast'' (AFDM-14) [[File:USS Kinkaid (DD-965) in floating drydock Steadfast.jpg|right|thumb|USS ''Kinkaid'' (DD-965) in floating drydock Steadfast]] Pollock-Stockton in Stockton, California, YFD 71. Sold to private users in 1998.<ref>[http://www.navsource.org/archives/09/28/2814.htm navsource, USS ''Steadfast'' (AFDM-14)]</ref>

==Medium Auxiliary Repair Docks (ARDM)==
[[Image:OAKRIDGE CGY.jpg|right|thumb|{{USS|Oak Ridge|ARDM-1}}]]
[[Engineering:Auxiliary repair dock|Auxiliary repair dock]] Mobile (ARDM) are 5,200 tons and 489 feet long. ARDs had a ship form hull and lifting capacity of 3,500 tons. ARDMs were used to repair [[Engineering:Destroyer|destroyer]]s, [[Engineering:Submarine|submarine]]s, and small auxiliaries. ARDMs had a crew of 130 to 160 men.<ref name="shiphistory" /><ref name="NavyBases" />
* USS ''Oak Ridge'' (ARDM-1) by Pacific Bridge Company, Now in US Coast Guard.
* USS ''Alamogordo'' (ARDM-2) by Pacific Bridge, Now in Ecuador.
* USS ''Endurance'' (ARDM-3) by Pacific Bridge, Now in South America.
'''Post WW2'''
* USS ''Shippingport'' (ARDM-4) by [[Company:Bethlehem Steel|Bethlehem Steel]], US Navy Active.
* USS ''Arco'' (ARDM-5) by Todd Pacific Shipyards in Seattle WA, US Navy Active.

==Small Auxiliary Floating Dry Docks (AFD - AFDL)==
[[File:US Navy 061102-N-4238B-036 The crew of the auxiliary floating dry dock Dynamic (AFDL 6) prepares for an incoming craft.jpg|right|thumb|USS ''Dynamic'' (AFD-6) at Virginia Beach, Va. on Nov. 2, 2006]] 
Auxiliary Floating Docks, Light (AFDL), also known as Auxiliary Floating Docks (AFD), were 288&nbsp;ft long, had a beam of 64&nbsp;ft (20 m), and draft of 3&nbsp;ft 3 in (0.99 m) empty and 31&nbsp;ft 4 in (9.55 m) flooded to load a ship. A normal crew was 60 men. AFDL displacement was 1,200 tons and could lift 1,900 tons. AFDL were built as one piece, open at both ends. AFDL were used to repair small craft, PT boats and small submarines. All AFD were reclassified AFDL after the war in 1946.<ref name="shiphistory" /><ref>[http://www.navsource.org/archives/09/28/2850.htm navsource.org, USS Ability (AFDL-7)]</ref><ref>[https://www.nvr.navy.mil/NVRSHIPS/HULL_SHIPS_BY_CATEGORY_AFDL_11.HTML US Navy, AFDL: SMALL AUXILIARY FLOATING DRY DOCK (N-S-P)]</ref>
[[File:USS Adept (AFD-23).jpg|thumb|right|{{USS|Adept|AFD-23}}]]
* USS ''Endeavor'' AFD-1/AFDL-1 By Chicago Bridge
* USS ''AFD-2'' By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2852.htm navsource, USS AFD-2]</ref>
* USS ''AFD-3''/AFDL-3 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2846.htm navsource, USS AFD-3]</ref>
* USS ''AFD-4''/AFDL-4 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2854.htm navsource, USS AFD-4]</ref>
* USS ''AFD-5''/AFDL-5 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2848.htm navsource, USS AFD-5]</ref>
* USS ''Dynamic'' (AFD-6)/AFDL-6 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2849.htm navsource, USS ''Dynamic'' (AFD-6)]</ref>
* USS ''Ability'' (AFD-7)/AFDL-7 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2850.htm navsource, USS ''Ability'' (AFD-7)]</ref>
* USS ''AFD-8''/AFDL-8 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2853.htm navsource, USS AFD-8]</ref>
* USS ''AFD-9''/AFDL-9 By Chicago Bridge, stationed at Naval Base Noumea<ref>[http://www.navsource.org/archives/09/28/2859.htm navsource, USS AFD-9]</ref>
* USS ''AFD-10''/AFDL-10 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2860.htm navsource, USS AFD-10]</ref>
* USS ''AFD-11''/AFDL-11 By Chicago Bridge<ref>[http://www.navsource.org/archives/09/28/2861.htm navsource, USS AFD-11]</ref>
* USS ''AFD-12''/AFDL-12<ref>[http://www.navsource.org/archives/09/28/2812.htm USS AFD-12]</ref>
* USS ''AFD-13''/AFDL-13 Typhoon Ida Sank off of Okinawa, Japan on 16 September 1945.<ref>{{cite web|url=http://www.history.navy.mil/faqs/faq82-2.htm |title=Casualties, Navy & Coast Guard ships WWII |publisher=history.navy.mil |access-date=9 March 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140410224418/http://www.history.navy.mil/FAQs/faq82-2.htm |archive-date=10 April 2014 }}</ref>
* USS ''AFD-14''/AFDL-14 served Espiritu Santo.<ref>Beans, Bullets, and Black Oil, By Rear Adm. Worrall Reed Carter, page repair</ref>
* USS ''AFD-15''/AFDL-15 served at Enewetak Atoll<ref>Beans, Bullets, and Black Oil, By Rear Adm. Worrall Reed Carter, page Enewetak Atoll July 1944</ref>
* USS ''AFD-16''/AFDL-16<ref>[http://www.navsource.org/archives/09/28/2816.htm navsource, USS AFD-16]</ref>
* USS ''AFD-17''/AFDL-17 served at Kwajalein Atoll<ref>Beans, Bullets, and Black Oil, By Rear Adm. Worrall Reed Carter, page Kwajalein Atoll Sept. 1944</ref>
* USS ''AFD-18''/AFDL-18
* USS ''AFD-19''/AFDL-19 By The Auchter Company served in Dunstaffnage a Scottish village, sold moved to Jacksonville, Florida<ref>[https://www.francisfrith.com/us/oban/dunstaffnage-the-war-years-1942-45_memory-202841 Dunstaffnage, war years]</ref>
* USS ''AFD-20''/AFDL-20 By Auchter Company served American Samoa<ref>Fold3.com, War Diary, 1/1-31/45, Page 1</ref>
* USS ''AFD-21''/AFDL-21 By Auchter Company<ref>[http://www.navsource.org/archives/09/28/2821.htm navsource, USS AFD-21]</ref>
* USS ''AFD-22''/AFDL-22 By Auchter Company<ref>[http://www.navsource.org/archives/09/28/2822.htm navsource, USS AFD-22]</ref>
* USS ''Adept'' (AFD-23)/AFDL-23 Auchter Company<ref>[http://www.navsource.org/archives/09/28/2823.htm navsource,USS ''Adept'' (AFD-23)]</ref>
* USS ''AFD-24''/AFDL-24 By Doullot & Ewin in Mobile, Alabama<ref>[http://www.navsource.org/archives/09/28/2824.htm USS AFD-24]</ref>
* USS ''AFD-25''/AFDL-25 By Doullot & Ewin<ref>[https://www.nvr.navy.mil/SHIPDETAILS/SHIPSDETAIL_AFDL_25_2361.HTML US Navy AFDL 25]</ref>
* USS ''AFD-26''/AFDL-26 By Doullot & Ewin<ref>[http://www.navsource.org/archives/09/28/2826.htm USS AFD-26]</ref>
* USS ''AFD-27''/AFDL-27 By Doullot & Ewin
* USS ''AFD-28''/AFDL-28 By Doullot & Ewin<ref>[http://www.navsource.org/archives/09/28/2878.htm navsource, USS AFD-28 ]</ref>
* USS ''AFD-29''/AFDL – AFDL-29 By Doullot & Ewin<ref>Dictionary of American Naval Fighting Ships, edited by James L. Mooney, page 709</ref>
* USS ''AFD-30''/AFDL-30 By Foundation Co. Scrapped in 1979.<ref>[http://www.navsource.org/archives/09/28/2880.htm navsource, USS AFD-30]</ref>
* USS ''AFD-31''/AFDL-31 By Foundation Co. Later YFD 83. To US Coast Guard 1947. After war moved to [[Place:Singapore|Singapore]].<ref>[http://www.naval-history.net/xGM-Chrono-15Fr-Bay-StBridesBay.htm HMS ST BRIDES BAY (K 600) - Bay-class Frigate]</ref>
* USS ''AFD-32''/AFDL-32 By Foundation Co.
* USS ''AFD-33''/AFDL-33 By Foundation Co. To Peru 1959 as AFD 106. Active.
* For AFDL-34 to AFDL-46 see: Auxiliary Repair Dock, Concrete

==Auxiliary Repair Docks (ARD)==
[[File:USSARD1undertowUSSBridgeAF1PanamaCanal28October1934.jpg|thumb|right|USS ''ARD-1'' under tow by USS ''Bridge'' 28 October 1934]]
[[File:USS_Waterford.jpg|right|thumb|{{USS|Waterford|ARD-5}}]]
[[File:ARD6DutchHarborAK_S46.jpg|thumb|right|''ARD-6'' submerged at Dutch Harbor, Alaska with Sub USS ''S-46'' for repair 1944]]
Auxiliary Repair Docks were built by Pacific Bridge Company in Alameda, California. ARD are 483&nbsp;ft long, have a beam of 71&nbsp;ft, a draft of 5&nbsp;ft, and a displacement of 4,800 tons. The crew complement is 6 officers and 125 enlisted. ARD have an armament of two single [[Engineering:Oerlikon 20 mm cannon|Oerlikon 20 mm cannon]]s, a bow and are sea worthy. They are self-sustaining with rudders to help in tow moving and have two cranes with a five-ton capacity. ARD also have a stowage barge for extra space. They were used to repair destroyers and submarines. Class 2 could repair Landing Ship, Tank (LST). The stern of the ship is open to allow a ship in need of repair to enter.<ref name="shiphistory" /><ref name="NavyBases" /><ref>NAVY DEPARTMENT, MANUAL OF ADVANCED BASE DEVELOPMENT AND MAINTENANCE, APRIL 1945</ref>
* {{USS|ARD-1}} Displacement of 2,200 tons. Built in 1933. Only one in class.<ref>[http://www.navsource.org/archives/09/67/67101.htm navsource, USS ARD-1]</ref>
* USS ''ARD-2'' stationed at Naval Base Noumea Sold in 1963.<ref>[http://www.navsource.org/archives/09/67/67102.htm navsource, USS ARD-2]</ref>
* USS ''ARD-3'' Sold in 1999.<ref>[http://www.navsource.org/archives/09/67/67103.htm navsource, USS ARD-3]</ref>
* USS ''ARD-4'' Sold in 1961.<ref>[http://www.navsource.org/archives/09/67/67104.htm navsource, USS ARD-4]</ref>
** ''ARD-2-class 410 ft long, 49 ft, 4 in wide, ARD-5 to 11:''
* USS ''Waterford'' (ARD-5)<ref>[http://www.navsource.org/archives/09/67/6705.htm navsource, USS ARD-5]</ref>
* USS ''ARD-6'' Sold in 1961.<ref>[http://www.navsource.org/archives/09/67/67106.htm navsource, USS ARD-6]</ref>
* USS ''West Milton'' (ARD-7) Scrapped in 1992.<ref>[http://www.navsource.org/archives/09/67/6707.htm USS ARD-7]</ref>
* USS ''ARD-8'' Sold in 1961.<ref>[http://www.navsource.org/archives/09/67/6708.htm navsource, USS ARD-8]</ref>
* {{USS|ARD-9}} Sold 1977<ref>[http://www.navsource.org/archives/09/67/6709.htm navsource, ARD-9]</ref>
* {{USS|ARD-10}} Sold, scrapped in 2014<ref>[http://www.navsource.org/archives/09/67/6710.htm navsource, ARD-10]</ref>
* USS ''ARD-11'' Sold 1977<ref>[http://www.navsource.org/archives/09/67/6711.htm navsource, ARD-11]</ref>
** ''ARD-2-class wide: 410 feet long, 49 feet, 4 inches 59 feet, 3 inches wide, ARD 12 to 32:''
* USS ''ARD-12'' Sold in 1987.<ref>[http://www.navsource.org/archives/09/67/6712.htm ARD-12]</ref>
* USS ''ARD-13'' Sold in 1977.<ref>[http://www.navsource.org/archives/09/67/6713.htm ARD-13]</ref>
* USS ''ARD-14'' Sold in 1980.<ref>[http://www.navsource.org/archives/09/67/6714.htm navsource, USS ARD-14]</ref>
* USS ''ARD-15'' Sold in 1971.<ref>[http://www.navsource.org/archives/09/67/6715.htm USS ARD-15]</ref>
* USS ''ARD-16'' By Pacific Bridge. Sold and moved to Mobile, AL.<ref>[http://www.navsource.org/archives/09/67/6716.htm navsource, USS ARD-16]</ref>
* {{USS|ARD-17}} Sold in 1971.<ref>[http://www.navsource.org/archives/09/67/6717.htm USS ARD-17]</ref>
* USS ''Endurance'' ARD-18 ARDM 3. Laid up at Charleston Naval Shipyard.<ref>[http://www.navsource.org/archives/09/67/6718.htm navsource, USS ''Endurance'' ARD-18 ARDM 3]</ref>
* USS ''Oak Ridge'' ARD-19 ARDM 1. To United States Coast Guard in 2002.<ref>[http://www.navsource.org/archives/09/67/6701.htm USS Oak Ridge (ARDM-1) ARD-19]</ref>
* USS ''White Sands'' ARD-20 By Pacific Bridge Co., (changed to AGDS-1). Sold in 1974.<ref>[http://www.navsource.org/archives/09/67/6720.htm navsource, USS ''White Sands'' (ARD-20)]</ref>
* USS ''ARD-21'' Reserve<ref>[http://www.navsource.org/archives/09/67/6721.htm navsource, USS ARD-21]</ref>
* USS ''Windsor'' (ARD-22) Sold in 1976<ref>[http://www.navsource.org/archives/09/67/6722.htm navsource, USS ARD-22 ''Windsor '']</ref>
* USS ''ARD-23'' Sold in 1992.<ref>[http://www.navsource.org/archives/09/67/6723.htm navsource, USS ARD-23]</ref>
* USS ''ARD-24'' Sold in 1982.<ref>[http://www.navsource.org/archives/09/67/6724.htm USS ARD-24]</ref>
* USS ''ARD-25'' Sold in 1973.<ref>[http://www.navsource.org/archives/09/67/6725.htm USS ARD-25]</ref>
* USS ''Alamogordo'' ARD-26 Sold in 2000.<ref>[http://www.navsource.org/archives/09/67/6702.htm navsource, USS ''Alamogordo'' (ARDM-2) ARD-26]</ref>
* USS ''ARD-27'' Scrapped in 1974.<ref>[http://www.navsource.org/archives/09/67/6727.htm USS ARD-27]</ref>
* USS ''ARD-28'' Sold and renamed ''Capitan Rodriguez Zamora''.<ref>[http://www.navsource.org/archives/09/67/6728.htm navsource, USS ARD-28]</ref>
* {{USS|Arco|ARD-29}} Sold to Iran in 1971.<ref>[http://www.navsource.org/archives/09/67/6729.htm USS ''Arco'' (ARD-29)]</ref>
* USS ''San Onfre'' (ARD-30) By Pacific Bridge Co.<ref>[http://www.navsource.org/archives/09/67/6730.htm navsource, USS ARD-30, USS ''San Onfre'']</ref>
* USS ''ARD-31'' To {{wipe|US Air Force}} in 1974.<ref>[http://www.navsource.org/archives/09/67/6731.htm navsource, USS ARD-31]</ref>
* USS ''ARD-32'' Sold in 1960.<ref>[http://www.navsource.org/archives/09/67/6732.htm navsource, USS ARD-32]</ref>
* USS ''ARD-33'' By Dravo Corp. Renamed AFDL 47 ''Reliance''.<ref>[http://www.navsource.org/archives/09/28/7347.htm navsource, USS ARD-33 - AFDL 47, '' Reliance'']</ref>

==Auxiliary Repair Dock, Concrete (ARDC)==
[[File:ARDC13_ship.jpg|thumb|right|ARDC-13, An Auxiliary Repair Dock, Concrete]]
[[File:AuxiliaryRepairDockConcreteUnderTow.jpg|thumb|right|Auxiliary Repair Dock, Concrete under tow]]
Auxiliary Repair Dock, Concrete were mobile dry docks made of concrete, due to the shortage of steel during World War II. ARDC had a 2,800 ton lifting capacity. ARDC were 389&nbsp;ft long, 84&nbsp;ft wide, and 40&nbsp;ft deep. ARDC has a crew of five officers and 84 enlisted men. Each had a 5-ton crane, with a 42&nbsp;ft reach. Eight were built at Wilmington, North Carolina, and five at San Pedro in Los Angeles, California.<ref>{{Cite journal|date=1946|title=Final Report for Tests Able and Baker|journal=Joint Task Force One|publisher=Bureau of Yards and Docks Group}}</ref><ref>Dictionary of American Naval Fighting Ships: V. 6: R Through S, Appendices, By James L. Mooney.</ref><ref>[https://www.globalsecurity.org/military/systems/ship/auxiliary-classes.htm Global security, Auxiliary Classes]</ref><ref name="NavyBases" />
*ARDC 1 – Changed to AFDL-34. Sold to Taiwan in 1959 ''Han Jih''.
*ARDC 2 – Changed to AFDL-35. Scrapped in 1974.
*ARDC 3 – Changed to AFDL-36. Sold to Taiwan in 1947 ''Hay Tan''. Scuttled in 2000.<ref>[http://www.navsource.org/archives/09/28/2836.htm navsource, ARDC 3]</ref>
*ARDC 4 – Changed to AFDL-37. Scrapped in 1981.
*ARDC 5 – Changed to AFDL-38. Placed out of service, date unknown. Final Disposition, transferred to San Francisco Maritime National Historical Park and leased to Bay Ship and Yacht shipyard at Alameda, CA.<ref>[http://www.navsource.org/archives/09/28/7338.htm navsource, ARDC 5]</ref>
*ARDC 6 – Changed to AFDL-39. Sold to Brazil in 1980 ''Cidade de Natal''.
*ARDC 7 – Changed to AFDL-40. Sold to the Philippines in 1990.
*ARDC 8 – Changed to AFDL-41. Sold in 1983 to North Florida Shipyard<ref>[http://www.navsource.org/archives/09/28/7341.htm navsource, ARDC 8]</ref>
*ARDC 9 – Changed to AFDL-42. Sold to Hurley Marine Works in 1945. Scrapped in 1975.
*ARDC 10 – Changed to AFDL-43. Scrapped in 1979.<ref>[http://www.navsource.org/archives/09/28/7343.htm navsource, ARDC 10]</ref>
*ARDC 11 – Changed to AFDL-44. Sold to the Philippines in 1969.<ref>[http://www.navsource.org/archives/09/28/7344.htm navsource, ARDC 11]</ref>
*ARDC 12 – Changed to AFDL-45. Sold to Todd Seattle 1945. Sold 1981 to Puglia Engineering.
*ARDC-13 – Changed to AFDL-46. Destroyed at Bikini in 1946.<ref>[http://www.navsource.org/archives/09/28/7346.htm navsource, ARDC-13]</ref>

==Yard Floating Dock (YFD)==
[[Image:YFD-2 arriving Pearl Harbor Oct 1940.jpg|right|thumb|YFD-2 The first Yard Floating Dock built in 1901, arriving Pearl Harbor 23 Oct. 1940 from New Orleans Naval Yard]]
Yard Floating Dock (YFD) was used for many types of floating docks, mostly used for [[Earth:Harbor|harbor]] or [[Engineering:Shipyard|shipyard]] use. YFDs normally had little-to-no crew space and were serviced from shore. Some auxiliary Repair Docks were converted to YFDs. Types of YFDs were: 400-ton concrete docks, 1,000-ton, 3,000-ton and 5,000-ton wood docks; sectional wood docks from 7,000 to 20,000 tons lifting capacity and a three-piece self docking steel sectional docks with 14,000 to 18,000 tons lifting capacity. All Medium Auxiliary Floating Dry Docks were converted to YFDs after World War II.<ref>[http://www.navsource.org/archives/14/0782.htm navsource, Yard Floating Dock (YFD)]</ref><ref>The Navy of the Nuclear Age, 1947–2007, By Paul Silverstone</ref><ref name="NavyBases" />
*{{USS|Dewey|YFD-1}} Built in 1905.
*USS ''YFD-2'' Built in 1901. Damaged in the attack at Pearl Harbor on 7 December 1941 and then repaired.<ref name="Yard Floating Dock (YFD)" /><ref>[https://www.history.navy.mil/our-collections/photography/wars-and-events/world-war-ii/pearl-harbor-raid/pearl-harbor-in-1940-1941/80-G-411134.html US Navy, YFD-2]</ref><ref>[https://www.nps.gov/valr/learn/historyculture/civilian-casualties.htm National Park Service, Civilian Casualties, YFD-2]</ref>
*{{USS|Richland|YFD-64}}
* {{ship|USS|YFD-67|}}. A medium auxiliary floating dry dock. Retired in 2003.<ref>[https://www.navy.mil/submit/display.asp?story_id=10503 US Navy, Floating Drydock Resolute Ends 58 Years of Service to Navy, Story Number: NNS031107-31Release Date: 11/7/2003 11:40:00 PM, By Chief Journalist (SW/AW) Mark O. Piggott, Commander, Submarine Force, U.S. Atlantic Fleet Public Affairs]</ref>
{{div col |small=yes |colwidth=10em}}
* USS ''YFD-3''
* USS ''YFD-4''
* USS ''YFD-5''
* USS ''YFD-6''
* USS ''YFD-7''
* USS ''YFD-8''
* USS ''YFD-9''
* USS ''YFD-10''
* USS ''YFD-11''
* USS ''YFD-12''
* USS ''YFD-13''
* USS ''YFD-14''
* USS ''YFD-15''
* USS ''YFD-16''
* USS ''YFD-17''
* USS ''YFD-18''
* USS ''YFD-19''
* USS ''YFD-20''
* USS ''YFD-21''
* USS ''YFD-22''
* USS ''YFD-23''
* USS ''YFD-24''
* USS ''YFD-25''
* USS ''YFD-26''
* USS ''YFD-27''
* USS ''YFD-28''
* USS ''YFD-29''
* USS ''YFD-30''
* USS ''YFD-31''
* USS ''YFD-32''
* USS ''YFD-33''
* USS ''YFD-34''
* USS ''YFD-35''
* USS ''YFD-36''
* USS ''YFD-37''
* USS ''YFD-38''
* USS ''YFD-39''
* USS ''YFD-40''
* USS ''YFD-41''
* USS ''YFD-42''
* USS ''YFD-43''
* USS ''YFD-44''
* USS ''YFD-45''
* USS ''YFD-46''
* USS ''YFD-47''
* USS ''YFD-48''
* USS ''YFD-49''
* USS ''YFD-50''
* USS ''YFD-51''
* USS ''YFD-52''
* USS ''YFD-53''
* USS ''YFD-54''
* USS ''YFD-55''
* USS ''YFD-56''
* USS ''YFD-57''
* USS ''YFD-58''
* USS ''YFD-59''
* USS ''YFD-60''
* USS ''YFD-61''
* USS ''YFD-62''
* USS ''YFD-63''
* USS ''YFD-64''
* USS ''YFD-65''
* USS ''YFD-66''
* USS ''YFD-67''
* USS ''YFD-68''
* USS ''YFD-69''
* USS ''YFD-70''
* USS ''YFD-71''
* USS ''YFD-72''
* USS ''YFD-73''
* USS ''YFD-74''
* USS ''YFD-75''
* USS ''YFD-76''
* USS ''YFD-77''
* USS ''YFD-78''
* USS ''YFD-79''
* USS ''YFD-80''
* USS ''YFD-81''
* USS ''YFD-82''
{{div col end}}

==Image gallery==
<gallery>
File:USS Abraham Lincoln (SSBN-602) in USS AFDB-7.jpg|{{USS|Abraham Lincoln|SSBN-602}} in USS ''AFDB-7''
File:ABSDsectionUnderTowwingsup.jpg|One Advance Base Sectional Dock (ABSD) section under tow with float wings up in 1944
File:ABSD5repairingUSSMississippiBB41.jpg|{{USS|ABSD-5}} at Manicani Island, Philippines repairing USS ''Mississippi'' in July 1945
File:USS Makin Island (CVE-93) enters floating drydock ABSD-6 at Guam on 8 June 1945 (NH 99118).jpg|USS ''Makin Island'' (CVE-93) halfway into USS ''ABSD-6'', at Guam, 8 June 1945
File:G379472.jpg|USS ''LST-646'' and {{USS|LST-662}} in ''ABSD-6'', in Apra Harbor, Guam, 29 May 1945
File:ABSD6assemblingApraHarbor1945.jpg|USS ''ABSD-6'' being assembled at Apra Harbor, Guam in 1945
File:ABSD3GuamMarianasIslandsUSSPennsylvaniaBB-38.jpg|{{USS|ABSD-3}} at Guam, to the rear right of ''ABSD-3'' is the land base that supported the ''ABSD-6'' and ''ABSD-3'' crews
File:USS Octans (AF-26) drydocked in YFD-18 at San Francisco, California (USA), 15 June 1943.jpg|{{USS|Octans|AF-26}} in YFD-18 at San Francisco on 15 June 1943
File:USS Iowa Floating Drydock.jpg|{{USS|Iowa|BB-61}} floating in dry dock
File:Seeadler USN drydock 1945.jpg|USS ''AFDB-2'' at Seeadler Harbor in 1945
File:ABSD6underTowSectionD.jpg|''ABSD-6''{{'}}'s Section D and one crane under tow to Guam. Pontoons are folded down to reduce wind resistance and lower center of gravity
File:ABSD-3 repairing small ship at the same time.jpg|''ABSD-3'' repairing small ships at the same time at Guam in 1945
File:USS Columbia (CL-56) docked in ABSD-1 at Espiritu Santo, in January 1944.jpg|Cruiser ''Columbia'' (CL-56) docked in ''Artisan'' (ABSD-1)
File:USS Columbia (CL-56) docks in ABSD-1 at Espiritu Santo, in January 1944.jpg|''Columbia'' docked in ''Artisan''
File:USS Artisan ABSD-1 04.jpg|AFDB-1 with ''West Virginia'' (BB-48) high and dry in the dock
File:USS Los Alamos (AFDB-7).JPEG|{{ship||Los Alamos |AFDB-7}}
File:USS Pennsylvania (ACR-4) in Drydock Dewey.jpg|USS ''Pennsylvania'' (ACR-4) in dry dock ''Dewey'', c. 1906–1907
File:USS Maryland (ACR-8) in Drydock Dewey.jpg|USS ''Maryland'' (ACR-8) in dry dock ''Dewey'', c. 1907
File:USS Chauncey in Drydock Dewey c. 1910.jpg|USS ''Chauncey'' (DD-3) in dry dock ''Dewey'', c. 1910
File:USS Chauncey in Drydock Dewey c. 1910, stern view.jpg|USS ''Chauncey'' (DD-3) in dry dock ''Dewey'', stern view, c. 1910
File:Drydock Dewey with submarines.jpg|US Navy submarines in dry dock ''Dewey'', c. 1912
File:Submarines in Drydock Dewey, c. 1912.jpg|US Navy submarines in dry dock ''Dewey'', c. 1912
File:USS Galveston (CL-19) in Drydock Dewey, c. 1916.jpg|[[Engineering:USS Galveston (CL-19)|USS ''Galveston'' (CL-19)]] in dry dock ''Dewey'', c. 1916
File:Dewey Drydock with USS Jason 1928 NARA 19-LC-19C.jpg|Aerial view of dry dock ''Dewey'' with USS ''Jason'' (AV-2) nearby, October 1928
File:USS Jason (AV-2) in the drydock USS Dewey (YFD-1), at Olongapo, Philippine Islands, on 9 March 1932 (80-CF-22672-1).jpg|Aerial view of USS ''Jason'' (AV-2) in dry dock ''Dewey'', 8 March 1932
File:USS Jason (AV-2) in drydock USS Dewey (YFD-1), at Olongapo, Philippine Islands, on 8 March 1932 (80-CF-22672-3).jpg|Side view of USS ''Jason'' (AV-2) in dry dock ''Dewey'', 9 March 1932
File:Arco (ARDM-5) Badge.gif|Official crest of ''Arco'' (ARDM-5)
File:US Navy 070425-N-6357K-002 Los Angeles-class fast attack submarine USS Asheville (SSN 758), nicknamed The Ghost of the Coast, enters the floating dry dock Arco (ARDM 5) for a scheduled maintenance period aboard Naval Base Point.jpg|[[Engineering:Los Angeles-class submarine|''Los Angeles'' class fast attack submarine]] USS ''Asheville'' (SSN-758) enters the floating dry dock of ''Arco'' (ARDM-5) for scheduled maintenance
</gallery>

==See also==
*[[Engineering:Dry dock|Dry dock]]
*[[Engineering:Heavy-lift ship|Heavy-lift ship]]
*Hughes Mining Barge
*PD-50 Russia's largest floating dry dock.
*[[Engineering:Semi-submersible naval vessel|Semi-submersible naval vessel]]
*[[Engineering:Semi-submersible platform|Semi-submersible platform]]
*{{slink|List of auxiliaries of the United States Navy#Auxiliary floating drydock}}
*{{slink|List of yard and district craft of the United States Navy#Yard Floating Drydocks (YFD)}}

==References==
{{reflist}}

==External links==
*{{Naval Vessel Register|{{Naval Vessel Register service craft URL|id=AFDB1a}}|{{Naval Vessel Register service craft URL|id=AFDB1e}}}} – sections a, g, h, i, j, and e
*{{Naval Vessel Register|{{Naval Vessel Register service craft URL|id=AFDB1f}}}} – section f
*{{Naval Vessel Register|{{Naval Vessel Register service craft URL|id=IX521}}|{{Naval Vessel Register service craft URL|id=IX525}}}} – IX-521 and IX-525
*[https://www.youtube.com/watch?v=GD2rM4RjUEY Youtube, BATTLESHIP USS IDAHO REPAIRED AT ESPIRITU SANTO in 1944 in USS Artisan (ABSD-1)1]
*[https://www.youtube.com/watch?v=Z_ZFNvypj2o Youtube, August 15, 1944 mighty battleship Idaho at ABSD-1]
*[https://www.youtube.com/watch?v=vQ0SM159nE0 Youtube, Floating Dry Docks WWII]
*[https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/b/beans-bullets-black-oil.html US Navy, Beans, Bullets, and Black Oil, The Story of Fleet Logistics Afloat in the Pacific During World War II]



[[Category:Auxiliary ships]]

{{Sourceattribution|Auxiliary floating drydock}}