History
United States
Name	USS LST-550
Builder	Missouri Valley Bridge and Iron Company, Evansville, Indiana
Laid down	13 November 1943
Launched	9 March 1944
Sponsored by	Mrs. Henry D. Hoover
Commissioned	10 April 1944
Decommissioned	13 January 1946
In service	In non-commissioned service with Military Sea Transportation Service as USNS LST-550 (T-LST-550) from 31 March 1952
Stricken	1 November 1973
Honors and awards	Two battle stars for World War II
General characteristics
Class and type	LST-542-class tank landing ship
Displacement	1,780 long tons (1,809 t) light 3,640 long tons (3,698 t) full
Length	328 ft (100 m)
Beam	50 ft (15 m)
Draft	Unloaded 2 ft 4 in (0.71 m) bow; 7 ft 6 in (2.29 m) stern Full load: 8 ft 2 in (2.49 m) forward; 14 ft 1 in (4.29 m) aft
Installed power	1,800 horsepower (1.34 megawatts)
Propulsion	Two 900-horsepower (0.67-megawatt) General Motors 12-567 diesel engines, two shafts, twin rudders
Speed	12 knots (22 km/h; 14 mph)
Boats & landing craft carried	2 x LCVPs
Troops	Approximately 130 officers and enlisted men
Complement	8-10 officers, 89-100 enlisted men
Armament	2 × twin 40 mm gun mounts 4 × single 40-millimeter gun mounts 12 × 20 mm guns

USS LST-550 was a United States Navy LST-542-class tank landing ship in commission from 1944 to 1946. She also served in a non-commissioned status with the Military Sea Transportation Service as USNS LST-550 (T-LST-550) from 1952.

LST-550 was laid down on 13 November 1943 at Evansville, Indiana, by the Missouri Valley Bridge and Iron Company. She was launched on 9 March 1944, sponsored by Mrs. Henry D. Hoover, and commissioned on 10 April 1944.

During World War II, LST-550 initially was assigned to the European Theater of Operations. She participated in Operation Dragoon, the invasion of southern France, in August and September 1944.

LST-550 subsequently was assigned to the Pacific Theater of Operations, where she took part in the assault on and occupation of Okinawa Gunto in June 1945.

Following the war, LST-550 performed occupation duty in the Far East until late December 1945, when she returned to the United States.

LST-550 was decommissioned on 13 January 1946.

On 31 March 1952, LST-550 was transferred to the Military Sea Transportation Service, where she served in a non-commissioned status as USNS LST-550 (T-LST-550).

USNS LST-550 was stricken from the Navy List on 1 November 1973. Her ultimate fate awaits further research.

LST-550 earned two battle stars for World War II service.

•  This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
• NavSource Online: Amphibious Photo Archive USS LST-550