BRP Sierra Madre

USS LST-821, renamed USS Harnett County (LST-821/AGP-281), is an LST-542-class tank landing ship built for the United States Navy during World War II. She was named for Harnett County, North Carolina and was the only U.S. Naval vessel to bear the name. She served the United States Navy in World War II and the Vietnam War. She was transferred to South Vietnam's Republic of Vietnam Navy, which named her RVNS My Tho (HQ-800).

USS Harnett County (AGP-821) in South Vietnamese waters, c. 1967–1970. Atop her flight deck is a Sikorsky H-34 Choctaw helicopter (left) and a Navy Helicopter Attack (Light) Squadron Three (HAL-3) "Seawolf" UH-1B Huey gunship.
History
United States
NameUSS LST-821
BuilderMissouri Valley Bridge & Iron Company, Evansville, Indiana
Laid down19 September 1944
Launched27 October 1944
Commissioned14 November 1944
DecommissionedMarch 1946
RenamedUSS Harnett County (LST-821), 1 July 1955
NamesakeHarnett County, North Carolina
Recommissioned20 August 1966
Decommissioned12 October 1970
ReclassifiedAGP-821, 1970
Honors and
awards
  • 1 battle star (World War II)
  • 9 battle stars, 2 Presidential Unit Citations, 3 Navy Unit Commendations (Vietnam)
FateTransferred to South Vietnam, 12 October 1970
South Vietnam
NameRVNS My Tho
NamesakeMỹ Tho
Acquired12 October 1970
IdentificationHQ-800
FateTransferred to the Philippines, 5 April 1976
Philippines
NameBRP Sierra Madre
NamesakeSierra Madre
Acquired5 April 1976
IdentificationLT-57
Fate
  • Deliberately grounded 1999 at Second Thomas Shoal (South China Sea). Remains in commission as a forward outport.
  • 9°47′27.4″N 115°51′23.7″E
General characteristics
Class and typeLST-542-class tank landing ship
Displacement
  • 1,625 long tons (1,651 t) light
  • 4,080 long tons (4,145 t) full
Length328 ft (100 m)
Beam50 ft (15 m)
Draft
  • Unloaded :
  • 2 ft 4 in (0.71 m) forward
  • 7 ft 6 in (2.29 m) aft
  • Loaded :
  • 8 ft 2 in (2.49 m) forward
  • 14 ft 1 in (4.29 m) aft
Propulsion2 × General Motors 12-567 diesel engines, two shafts, twin rudders
Speed12 knots (22 km/h; 14 mph)
Boats & landing
craft carried
2 LCVPs
Troops16 officers, 147 enlisted men
Complement7 officers, 104 enlisted men
Armament

After the Vietnam War, Harnett County was transferred to the Philippine Navy, which named her BRP Sierra Madre (LT-57). In 1999, the Philippine government deliberately had her run aground on Second Thomas Shoal in the Spratly Islands to serve as an outpost of the Philippine Marine Corps to assert Philippine sovereignty in the country's dispute with China over the ownership of the Spratly Islands. She still serves that function as of 2024.

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