Dock landing ship

USS Harpers Ferry, a United States Navy dock landing ship

A dock landing ship (also called landing ship, dock or LSD) is an amphibious warfare ship with a well dock to transport and launch landing craft and amphibious vehicles.^[1] Some ships with well decks, such as the Soviet Ivan Rogov class, also have bow doors to enable them to deliver vehicles directly onto a beach (like a Landing Ship, Tank). Modern dock landing ships also operate helicopters.

A ship with a well deck (docking well) can transfer cargo to landing craft in rougher seas than a ship that has to use cranes or a stern ramp.^[2] The US Navy hull classification symbol for a ship with a well deck depends on its facilities for aircraft - a (modern) LSD has a helicopter deck, a LPD also has a hangar, and a LHD or LHA has a full-length flight deck.^[2]

History

The LSD (US Navy hull classification for landing ship, dock) came as a result of a British requirement during the Second World War for a vessel that could carry large landing craft across the seas at speed.

The first LSD came from a design by Sir Roland Baker who had designed the British Landing Craft, Tank. It was an answer to the problem of launching small craft rapidly. The "Landing Ship Stern Chute", which was a converted train ferry, was an early attempt. Thirteen Landing Craft Mechanized (LCM) could be launched from these ships down the chute. The Landing Ship Gantry was a converted tanker with a crane to transfer its cargo of landing craft from deck to sea - 15 LCM in a little over half an hour.^[3]

The design was developed and built in the US for the USN and the Royal Navy. The LSD could carry 36 LCM at 16 knots. It took one and a half hours for the dock to be flooded down and two and half to pump it out. When flooded they could also be used as docks for repairs to small craft.

Amphibious vehicles inside a US LSD

A British Bay-class landing ship

Vessels of the LSD hull classification

In the United States Navy, two related groups of vessels classified as LSDs are in service as of 2011, the Whidbey Island and Harpers Ferry classes, mainly used to carry hovercraft (LCACs), operate helicopters, and carry Marines.^[4]

The British Royal Fleet Auxiliary (RFA) operates three Bay-class landing ships based on the Dutch-Spanish Enforcer design in support of the Royal Navy's operations, while a fourth ship of the class - previously in RFA service - is now operated by the Royal Australian Navy.

Former US LSDs include the Ashland class, Casa Grande class, Thomaston class and Anchorage class.

LSD Classes

In service

Country	Class	In service	Commissioned	Length	Beam	Draft	Displacement (mt)	Note
Australia	Choules	1	2011	176.6 m (579 ft)	26.4 m (87 ft)	5.8 m (19 ft)	17,810	Ex-RFA Largs Bay (L-3006) sold to Royal Australian Navy in April 2011, renamed to HMAS Choules (L-100).
Brazil	Ceará	1	1989	160 m (520 ft)	26.0 m (85.3 ft)	5.94 m (19.5 ft)	11,989	In reserve, ex-USS Hermitage (LSD-34) loaned to Brazilian Navy in 1989, renamed to NDD Ceará(G-30), sold to Brazilian Navy in 2001.
Republic of China	Hsu Hai	1	2000	169 m (554 ft)	26.0 m (85.3 ft)	6.1 m (20 ft)	14,225	Ex-USS Pensacola (LSD-38) sold to Republic of China (Taiwan) Navy in 2000, renamed to ROCS Hsu Hai (LSD-193).
United Kingdom	Bay	3	2007	176.6 m (579 ft)	26.4 m (87 ft)	5.8 m (19 ft)	17,810
United States	Whidbey Island	8	1985	186 m (610 ft)	26.0 m (85.3 ft)	5.94 m (19.5 ft)	16,100
United States	Harpers Ferry	4	1995	185.80 m (609.6 ft)	26.0 m (85.3 ft)	5.94 m (19.5 ft)	19,600

Decommissioned

Country	Class	In service	Commissioned	Length	Beam	Draft	Displacement (mt)	Note
Argentina	Cándido de Lasala	1	1970-1981	139.5 m (458 ft)	22.0 m (72.2 ft)	4.83 m (15.8 ft)	7,930	Ex-USS Gunston Hall (LSD-5) sold to Argentina in 1970 and renamed to ARA Cándido de Lasala (Q-43), scrapped after 1981.
Brazil	Rio de Janeiro	1	1990-2012	160 m (520 ft)	26.0 m (85.3 ft)	5.94 m (19.5 ft)	11,989	Ex-USS Alamo (LSD-33) loaned to Brazilian Navy in 1990, renamed to NDD Rio de Janeiro (G-31).
Republic of China	Chung Cheng	1	1977-1985	139.5 m (458 ft)	22.0 m (72.2 ft)	4.83 m (15.8 ft)	7,930	Ex-USS White Marsh (LSD-8) loaned to the ROC Navy in 1960 and renamed to ROCS Chung Cheng (LSD-191), scrapped 1985.
Republic of China	Chung Cheng	1	1984-2012	139.5 m (458 ft)	22.0 m (72.2 ft)	4.83 m (15.8 ft)	7,930	Ex-USS Comstock (LSD-19) sold for scrapping on 17 October 1984 by MARAD, salvage by ROC Navy and commissioned in 1984, renamed to ROCS Chung Cheng (LSD-191).
Soviet Union	Ivan Rogov	3	1978–2002	157 m (515 ft)	23.8 m (78 ft)	6.7 m (22 ft)	14,060	Ivan Rogov and Aleksandr Nikolayev are now being preserved; Mitrofan Moskalenko was being auctioned off for scrapping in 2012.^[5]
United States	Ashland	8	1943-1969	139.5 m (458 ft)	22.0 m (72.2 ft)	4.83 m (15.8 ft)	7,930	Ex-USS Gunston Hall (LSD-5) sold to Argentina and scrapped after 1981 and Ex-USS White Marsh (LSD-8) sold to Taiwan and scrapped 1985; rest scrapped from 1968 to 1970.
	Casa Grande	13	1944-1970	139.5 m (458 ft)	22.0 m (72.2 ft)	4.83 m (15.8 ft)	7,930	Ex-USS Shadwell (LSD-15) is only ship in the class still exist and it is still in use as a test and training platform in the development of fire models and other damage and control systems, most others scrapped or sunk as target.
	Thomaston	7	1954–1990	160 m (520 ft)	26.0 m (85.3 ft)	5.94 m (19.5 ft)	11,989	Ex-USS Alamo (LSD-33) loaned to Brazilian Navy (now decommissioned) and ex-USS Hermitage (LSD-34) loaned (now in reserve) and late sold to Brazilian Navy.
	Anchorage	5	1969–2003	169 m (554 ft)	26.0 m (85.3 ft)	6.1 m (20 ft)	14,225	Ex-USS Pensacola (LSD-38) sold to Republic of China (Taiwan) Navy and only active ship with all others scrapped or sunk as target.

References

↑ "Mother of Minesweepers". Popular Mechanics: 97–104, see drawings pp. 98–99. February 1952.
1 2 "World Wide Landing Ship Dock/Landing Platform Dock". Retrieved 2012-05-17.
↑ Brown 2006, p. 145
↑ US Navy Office of Information Fact File - LSD
↑ http://barentsobserver.com/en/security/landing-ship-be-scrapped-11-09

Cited literature

Brown, D. K. (November 2006). Nelson to Vanguard. Annapolis, Maryland: US Naval Institute Press. ISBN 1-59114-602-X.

External links

Wikimedia Commons has media related to Dock landing ships.

US Navy Office of Information Fact File - LSD

Naval ships and warships in the Late Modern period

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Escort	Aviso Convoy rescue ship Destroyer Destroyer escort Destroyer leader Escort destroyer Frigate Guided missile destroyer Kaibōkan Sloop

Transport	Amphibious transport dock Amphibious warfare ship Attack transport Dock landing ship Landing craft Landing craft carrier Landing Craft Support Landing Ship Heavy Landing ship, infantry Landing Ship Medium Landing Ship, Tank Landing Ship Vehicle Troopship

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