HII Launches Portland

On February 13, Huntington Ingalls Industries’ (HII) Ingalls Shipbuilding division has launched the company’s 11th amphibious transport dock, USS Portland (LPD-27). The ship, named for Oregon’s largest city, is scheduled to be christened on May 21.

USS Portland (LPD-27) is seen here in the middle of launch early Saturday morning at Ingalls Shipbuilding in Pascagoula. Portland is the 11th San Antonio-class landing platform dock (Photo by Andrew Young/HII)
USS Portland (LPD-27) is seen here in the middle of launch early Saturday morning at Ingalls Shipbuilding in Pascagoula. Portland is the 11th San Antonio-class landing platform dock (Photo by Andrew Young/HII)

«It takes a tremendous effort by all of our crafts personnel to accomplish this big milestone», said Bruce Knowles, Ingalls’ LPD-27 program manager. «The LPD program continues to improve with each ship, and LPD-27 falls into that same line of success proven by a hot production line. Our shipbuilders continue to build these ships more efficiently and affordably».

USS Portland (LPD-27) was translated via Ingalls’ rail car system to the floating dry dock prior to launch. The dock was moved away from the pier and then flooded to float the ship. With the assistance of tugs, Portland came off the dock on Saturday morning.

Ingalls has built and delivered nine ships in the San Antonio class of ships, with USS John P. Murtha (LPD-26) and USS Portland (LPD-27) remaining. Ingalls received a $200 million advance procurement contract for LPD-28, the 12th ship in the class, in December, 2015.

The San Antonio class is the latest addition to the U.S. Navy’s 21st century amphibious assault force. The 684-foot-long/208-meter-long, 105-foot-wide/32-meter-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.

John P. Murtha (LPD-26) is the tenth ship in the San Antonio Class
John P. Murtha (LPD-26) is the tenth ship in the San Antonio Class

 

General Characteristics

Builder Huntington Ingalls Industries
Propulsion Four sequentially turbocharged marine Colt-Pielstick Diesels, two shafts, 41,600 shaft horsepower
Length 684 feet/208 m
Beam 105 feet/32 m
Displacement Approximately 24,900 long tons (25,300 metric tons) full load
Draft 23 feet/7 m
Speed In excess of 22 knots/24.2 mph/38.7 km/h
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 (RAM) launchers, fore and aft: ten .50 calibre/12.7-mm machine guns
Aircraft Launch or land two CH-53E 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

USS Anchorage (LPD-23), San Diego, CA

USS Arlington (LPD-24), Norfolk, VA

USS Somerset (LPD-25), San Diego, CA

USS John P. Murtha (LPD-26), San Diego, CA

USS Portland (LPD-27), launched

LPD-28, procurement contract

 

Here’s a time lapse video of the amphibious warship USS Portland (LPD-27) being translated and launched at Ingalls Shipbuilding in Pascagoula. This ship first hit water on Saturday, February 13. Portland is the 11th San Antonio-class Landing Platform Dock to be built

 

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