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Thomaston-class dock landing ship
USS Thomaston;10122801
Class overview
Builders: Ingalls Shipbuilding, Pascagoula, Mississippi[1]
Operators: Flag of the United States.svg United States Navy
Flag of Brazil.svg Brazilian Navy
Preceded by: Casa Grande-class dock landing ship
Succeeded by: Anchorage-class dock landing ship
Built: 1953–1956
In commission: 1954–
Completed: 8
Active: 1
Retired: 7
General characteristics
Type: Dock landing ship
Displacement: 11,800 long tons (11,989 t) full load
Length: 510 ft (160 m)
Beam: 84 ft (26 m)
Propulsion: 2 × 600 psi boilers, 2 × geared turbines, 2 shafts, 24,000 shp (17,897 kW)
Speed: 22 knots (41 km/h; 25 mph)+
Boats & landing
craft carried:
3 × LCU or 9 × LCM-8 or 50 × AAV/LVTP-7 amphibious tractors
Troops: 325
Complement: 348 (18 officers, 330 enlisted)
Armament: 4 × 3 in (76 mm)/50 cal Mk.33 AA guns (2 twin mounts)
Aviation facilities: Helicopter landing area

The Thomaston-class was a class of eight dock landing ships built for the United States Navy in the 1950s.

The class of the ship is named after a town of Thomaston, Maine, which was the home of General Henry Knox, the first Secretary of War to serve under the United States Constitution.[2]


The Thomaston-class was the second class of dock landing ships of the U.S. Navy, designed and approved in the early 1950s. Compared to the Ashland-/Casa Grande- class dock landing ships of World War II, the ships of this class were about a third larger and five knots faster than the preceding class.[3] The class was designed to be able to transport:

The dock was covered by removable segments that were able to carry the weight of two medium helicopters. Both cranes could lift weights of up to 50 ts. The machinery spaces were located underneath the dock, in contrast to the earlier Ashland-class, where the machinery spaces were located to port and starboard of the dock.

Originally, all ships were armed with eight 3″/50 caliber gun Mark 33 twin mounts. The number was later reduced.

Spiegel Grove was trials hip for the Jeff(A) and Jeff(B) landing craft in the mid-1980s. Jeff(B) was then developed into the Landing Craft Air Cushion. All ships were decommissioned by the U.S. Navy between 1983 and 1990, Alamo and Hermitage were sold to Brazil in 1989-1990.[4]

Ships in classEdit

Ship Name Hull No. Commission–
Thomaston LSD-28 17 September 1954–28 September 1984 scrapped
Plymouth Rock LSD-29 29 November 1954–30 September 1983 scrapped
Fort Snelling LSD-30 24 January 1955–28 September 1984 scrapped
Point Defiance LSD-31 31 March 1955–30 September 1983 scrapped
Spiegel Grove LSD-32 8 June 1956–2 October 1989 Sunk in 2002 off Key Largo as an artificial reef
Alamo LSD-33 24 August 1956–28 September 1990 to Brazil as Rio de Janeiro (G31), decommissioned 15 June 2012
Hermitage LSD-34 14 December 1956–2 October 1989 to Brazil as Ceará (G30)
Monticello LSD-35 29 March 1957–1 October 1985 sunk as a target, 14 July 2010


  1. Bundschuh, Randy. "USS Thomaston (LSD-28) Characteristics". Retrieved 2007-12-15. 
  2. "Thomaston". Naval Historical Center. Retrieved 2007-12-15. 
  3. Paul H. Silverstone: U.S. Warships since 1945. Ian Allan Ltd. Shepperton, Surrey (UK), 1986, p. 98. ISBN 0-7110-1598-8
  4. Stefan Terzibaschitsch: 50 Jahre amphibische Schiffe der U.S. Navy, Leonberg, Germany 1995, p. 37.

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