San Antonio-class amphibious transport dock

	USS San Antonio and USS New York in June 2011
Class overview
Builders	Avondale Shipyard (closed since 2014); Ingalls Shipbuilding (current shipbuilder); Current Parent Company: Huntington Ingalls Industries (formerly Northrop Grumman Ship Systems) ; Ex-parent company: Litton Industries;
Operators	United States Navy
Preceded by	Austin-class amphibious transport dock; Newport-class tank landing ship; Charleston-class amphibious cargo ship; Whidbey Island-class dock landing ship;
Cost	$1.602 billion (ave. for class, FY2012); $2.021 billion (last ship, FY2012);
Built	2000–present
In commission	2006–present
Planned	26 (13 for Flight I and 13 for Flight II)
On order	2
Building	2
Completed	12
Active	12
General characteristics
Type	Amphibious transport dock
Displacement	25,300 t (full)
Length	684 ft (208 m)
Beam	105 ft (32 m)
Draft	23 ft (7.0 m), full load
Propulsion	Four sequentially turbocharged marine Colt-Pielstick diesel engines, two shafts, 41,600 shp
Speed	In excess of 22 knots (25 mph; 41 km/h)
Boats & landing ; craft carried	2 × LCACs (air cushion); or; 1 × LCU (conventional); 14 × Amphibious Assault Vehicles;
Complement	Crew: 28 officers, and 333 enlisted sailors; Landing force: 66 officers, and 633 enlisted troops;
Sensors and ; processing systems	AN/SPS-48G, AN/SPQ-9B
Electronic warfare ; & decoys	AN/SLQ-32
Armament	2 × Bushmaster II close-in-guns; 2 × RIM-116 Rolling Airframe Missile launchers; 2 × 8 cell Mark 41 Vertical Launching System for quad-packed ESSMs (not fitted); Several twin M2 Browning machine gun turrets;
Aircraft carried	Launch or land up to two MV-22 Osprey tilt-rotor aircraft simultaneously with room to place four MV-22s on the flight deck and one in the hangar deck

The San Antonio class is a class of amphibious transport docks, also called a "landing platform, dock" (LPD), used by the United States Navy. These warships replace the Austin-class LPDs (including Cleveland and Trenton sub-classes), as well as the Newport-class tank landing ships, the Anchorage-class dock landing ships, and the Charleston-class amphibious cargo ships that have already been retired.

Twelve ships of the San Antonio class were originally proposed, their original target price was US$890 million; as built, their average cost is $1.6 billion. Defense Authorization for Fiscal Year 2015 included partial funding for the twelfth San Antonio-class ship. As of December 2022 eleven warships of this class were in service with the U.S. Navy, with an additional three ships under construction. The Navy decided in 2018 to produce a second flight of 13 planned LPD Flight II ships, for a total of 26 in the LPD 17 class; LPD 30, Harrisburg, is the first Flight II ship.

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