U.S. Navy Landing Platform Docks (LPD)

The design of the San Antonio Amphibious Assault Ships was jointly developed by Navy, Marine Corps and industry stakeholders to provide superior performance over a broad range of operational requirements.  LPD 17 provides the Navy and Marine Corps with modern, sea based platforms for execution of Expeditionary Warfare Missions. Each ship’s survivability features allow the crew to confidently sail into harm’s way and extend their reach with the compliment of air cushioned landing craft, helicopters or tilt rotor aircraft.

LPD Facts

The San Antonio class is a major part of the Navy’s 21st century amphibious assault force. The 684-foot-long, 105-foot-wide ships are used to embark and land Marines, their equipment and supplies ashore via air cushion or conventional landing craft and amphibious assault vehicles, augmented by helicopters or vertical takeoff and landing aircraft such as the MV-22 Osprey. The ships support a Marine Air Ground Task Force across the spectrum of operations, conducting amphibious and expeditionary missions of sea control and power projection to humanitarian assistance and disaster relief missions throughout the first half of the 21st century.

An LPD amphibious transport dock is equipped with:

  • Two 30 mm Bushmaster II cannons for surface defense
  • Two Rolling Airframe Missile (RAM) launchers for air defense
  • Four CH-46 Sea Knight helicopters
  • Two LCACs, one LCU and 14 AAVs
  • Four diesel engines that can reach a maximum speed of more than 22 knots.

Design & Construction

Ingalls Shipbuilding is the sole provider of the San Antonio (LPD 17) class of amphibious transport dock ships for the U.S. Navy. The versatile 684-foot-long ships are designed with the goal of meeting the Navy and Marines Corps needs, embracing a “Design for Ownership” philosophy to interact with the fleet’s operating forces.

The unique design-engineering approach injected fleet input into the development process before construction began and shaped every element of the ships’ systems and spaces to meet future requirements.

Each LPD consists of 210 units built utilizing modular construction techniques. Each unit is extensively pre-outfitted with piping, electrical, machinery and ventilation systems along with many pieces of equipment prior to launch.

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Delivered Ships

Ingalls has delivered 11 San Antonio-class LPDs to the U.S. Navy:

USS San Antonio (LPD 17) 5/13/2005
USS New Orleans (LPD 18) 12/22/2006
USS Mesa Verde (LPD 19) 9/28/2007
USS Green Bay (LPD 20) 8/29/2008
USS New York (LPD 21) 8/21/2009
USS San Diego (LPD 22) 12/19/2011
USS Anchorage (LPD 23) 9/17/2012
USS Arlington (LPD 24) 12/7/2012
USS Somerset (LPD 25) 10/18/2013
USS John P. Murtha (LPD 26) 5/13/2016
USS Portland (LPD 27) 9/18/2017