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Amphibious Transport Dock - LPD

 
Description
Amphibious transport dock ships are warships that embark, transport, and land elements of a landing force for a variety of expeditionary warfare missions.
 
Features
LPDs are used to transport and land Marines, their equipment and supplies by embarked Landing Craft Air Cshion (LCAC) or conventional landing craft and Expeditionary Fighting Vehicles (EFV) or Amphibious Assault Vehicles (AAV) augmented by helicopters or vertical take off and landing aircraft (MV 22). These ships support amphibious assault, special operations or expeditionary warfare missions and can serve as secondary aviation platforms for amphibious ready groups.
 
Background
The versatile Austin-class LPDs provide substantial amphibious lift for Marines and their vehicles and cargo. As the San Antonio-class LPDs have entered service in recent years, Austin-class LPDs have been decommissioned. Collectively, the LPD-17 class ships will functionally replace more than 41 ships (LPD 4, LSD 36, LKA 113, and LST 1179 classes of amphibious ships) providing the Navy and Marine Corps with modern, seabased platforms that are networked, survivable, and built to operate with 21st century transformational platforms, such as the MV-22 Osprey, the Expeditionary Fighting Vehicle (EFV), and future means by which Marines are delivered ashore. A contract for final design and construction of San Antonio (LPD 17), the lead ship in the class, was awarded in December 1996; actual construction commenced in June 2000. USS San Antonio was delivered to the Navy in July 2005. LPDs 18-25 have also been delivered to the Navy. New York (LPD 21) is the first of three LPD 17-class ships built in honor of the victims of the Sept. 11, 2001, terrorist attacks. The ship’s bow stem was constructed using 7.5 tons of steel salvaged from the World Trade Center. The Navy named the 8th and 9th ships of the class -- Arlington and Somerset -- in honor of the victims of the attacks on the Pentagon and United Flight 93, respectively. Materials from those sites were also incorporated into Arlington and Somerset. LPDs 26-27 are currently under construction at Huntington Ingalls Industries (HII) on the Gulf Coast, and will deliver over the next few years. The keel of LPD 27 was laid in August 2013, LPD 26 was launched in October 2014. In fiscal year 2015, the purchase of long lead time materials for LPD 28 was approved.
 
Point Of Contact
Corporate Communications Office
Naval Sea Systems Command (SEA 00D)
Washington, D.C. 20376
 
General Characteristics, San Antonio Class
Builder: Huntington Ingalls Industries
Propulsion: Four sequentially turbocharged marine Colt-Pielstick Diesels, two shafts, 41,600 shaft horsepower.
Length: 684 ft
Beam: 105 ft
Displacement: Approximately 24,900 long tons (25,300 metric tons) full load
Draft: 23 ft
Speed: In excess of 22 knots (24.2 mph, 38.7 kph)
Crew: Ship's Company: 374 Sailors (28 officers, 346 enlisted) and 3 Marines. Embarked Landing Force: 699 (66 officers, 633 enlisted); surge capacity to 800.
Armament: Two Bushmaster II 30 mm Close in Guns, fore and aft; two Rolling Airframe Missile launchers, fore and aft: ten .50 calibre machine guns.
Aircraft: Launch or land two CH53E Super Stallion helicopters or two MV-22 Osprey tilt rotor aircraft or up to four CH-46 Sea Knight helicopters, AH-1 or UH-1 helicopters.
Landing/Attack Craft: Two LCACs or one LCU; and 14 Expeditionary Fighting Vehicles/Amphibious Assault Vehicles
Ships:
USS San Antonio (LPD 17), Norfolk, VA
USS New Orleans (LPD 18), San Diego, CA
USS Mesa Verde (LPD 19), Norfolk, VA
USS Green Bay (LPD 20), San Diego, CA
USS New York (LPD 21), Norfolk, VA
USS San Diego (LPD 22), San Diego, CA - Christened June 12, 2010.
USS Anchorage (LPD 23), San Diego - Christened May 14, 2011, Commissioned May 4, 2013
USS Arlington (LPD 24), Norfolk, VA - Christened March 26, 2011, Comissioned April 6, 2013
USS Somerset (LPD 25), Under construction
PCU John P. Murtha (LPD 26) - under construction - San Diego, CA.
PCU Portland (LPD-27), Authorized for US Navy construction
 
General Characteristics, Austin class
Builder: LPD 4-6, New York Naval Shipyard
LPD 7 and LPD 8, Ingalls Shipbuilding
LPD 9, 10, 12-15, Lockheed Shipbuilding.
Date Deployed: Feb. 6, 1965 (USS Austin)
Unit Cost: $235-419 million.
Propulsion: Two boilers, two steam turbines, two shafts, 24,000 shaft horsepower.
Length: 570 feet (171 meters).
Beam: 84 feet (25.2 meters).
Displacement: Approximately 17,000 tons (17,272.82 metric tons) full load.
Speed: 21 knots (24.2 mph, 38.7 kph).
Crew: Ship's Company: 420 (24 officers, 396 enlisted), Marine Detachment: 900.
Armament: Two 25mm Mk 38 guns; two Phalanx CIWS; and eight .50-calibre machine guns.
Aircraft: Up to six CH-46 Sea Knight helicopters.
Ships:
USS Cleveland (LPD 7), San Diego, CA
USS Denver (LPD 9), Sasebo, Japan
USS Dubuque (LPD 8), San Diego, CA
 
Last Update: 14 November 2014
 
 
LPD 17 underway