San Antonio-class Amphibious Transport Dock

The San Antonio-class is the United States Navy's new primary class of amphibious transport dock (LPD) in the beginning of the 21st century. It is replacing the older Austin, Cleveland, and Trenton-class LPDs as well as the Anchorage-class dock landing ships, Newport-class tank landing ships, and one class that has already been retired, the Charleston-class amphibious cargo ships.

Twelve San Antonios are planned for service, although only eleven of them are currently in active service. The average cost is US$1.6bn, compared to an original target of $890m. As of August 2017 eleven are in service.

Specifications

 * Type: Amphibious Transport Dock (Hull designation symbol LPD)
 * Service Period: 2006-
 * Characteristics
 * Length: 684 feet (208.48 meters)
 * Beam: 105 feet (32 meters)
 * Draft: 23 feet (7.01 meters) - Full Load
 * Displacement: 19,208 tons (Standard); 25,883 tons (Full Load)
 * Complement: 699 (66 officers and 633 enlisted)
 * Crew: 361 (28 officers and 333 enlisted)
 * Propulsion: Four sequentially turbocharged marine Colt-Pielstick diesel engines, two shafts, 41,600 shp
 * Range: 8,000 nautical miles (14,816 kilometers) at 18 knots (33.34 km/h)
 * Speed: 24 knots (44.45 km/h)
 * Sensor Suite:
 * AN/SPS-48G 3D Air Search Radar
 * AN/SPS-73(V)13 Surface Search Radar
 * AN/SPQ-9B Fire Control Radar
 * Countermeasures:
 * AN/SLQ-25 Nixie Torpedo Countermeasures Suite
 * AN/SLQ-32(V)3 Electronic Warfare Suite
 * 4 x Mk.36 SBROC decoy launchers
 * 2 x Mk.53 Nulka decoy launchers
 * Armament:
 * 2 x 30mm Mk.46 Bushmaster II guns
 * 2 x 8-cell Mk.41 VLS (quad packed with RIM-162 ESSM missiles)
 * 2 x 21-cell Mk.49 Rolling Airframe Missile Launchers
 * 8 x twin mount M2 Browning machine guns
 * Aircraft Carried: 4 x CH-46 Sea Knights, or 4 x MV-22B Ospreys
 * Boats & Landing Craft: 2 x LCACs (air cushion); or 1 x LCU (conventional), 14 x Expeditionary Fighting Vehicles/AAVs

Unit Run

 * USS San Antonio (LPD-17)
 * USS New Orleans (LPD-18)
 * USS Mesa Verde (LPD-19)
 * USS Green Bay (LPD-20)
 * USS New York (LPD-21)
 * USS San Diego (LPD-22)
 * USS Anchorage (LPD-23)
 * USS Arlington (LPD-24)
 * USS Somerset (LPD-25)
 * USS John P. Murtha (LPD-26)
 * USS Portland (LPD-27) - fitting out
 * USS Fort Lauderdale (LPD-28) - planned for construction