San Antonio-class Amphibious Transport Dock

The amphibious transport dock ships USS San Antonio (LPD-17) and USS New York (LPD-21) are underway together in the Atlantic Ocean off the coast of Virginia on June 9^th, 2011.

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 March 2018 eleven are in service, one is under construction, and two are planned for construction.

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 - replaced by AN/SPY-6(V)2 in Flight II vessels.
  • 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

Flight I

• 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)
• USS Fort Lauderdale (LPD-28) - sea trials
• USS Richard M. McCool Jr. (LPD-29) - fitting out

Flight II

• USS Harrisburg (LPD-30) - under construction
• USS Pittsburgh (LPD-31) - under construction
• USS Philadelphia (LPD-32) - planned for construction
• USS Unnamed (LPD-33) - planned for construction
• USS Unnamed (LPD-34) - planned for construction
• USS Unnamed (LPD-35) - planned for construction
• USS Unnamed (LPD-36) - planned for construction
• USS Unnamed (LPD-37) - planned for construction
• USS Unnamed (LPD-38) - planned for construction
• USS Unnamed (LPD-39) - planned for construction
• USS Unnamed (LPD-40) - planned for construction
• USS Unnamed (LPD-41) - planned for construction
• USS Unnamed (LPD-42) - planned for construction