USNS Sioux (T-ATF-171)

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USNS Sioux (T-ATF-171).jpg
USNS Sioux (T-ATF-171)
Name: USNS Sioux (T-ATF-171)
Namesake: The Sioux, a Native American people
Builder: Marinette Marine Corporation, Marinette, Wisconsin
Laid down: 22 March 1979
Launched: 15 November 1980
Acquired: 1 May 1981
In service: 1981
Status: Active
General characteristics
Class and type: Powhatan-class fleet ocean tug
Displacement: 1,387 long tons (1,409 t) light
2,000 long tons (2,032 t) full
Length: 226 ft (69 m)
Beam: 42 ft (13 m)
Draft: 15 ft (4.6 m)
Installed power: 5.73 megawatts (4,280 horsepower) sustained
Propulsion: 2 × General Motors EMD 20-645F7B diesel engines, two shafts; bow thruster, 300 hp (224 kW)
Speed: 14.5 knots (26.9 km/h; 16.7 mph)
Complement: 16 civilians plus 4 U.S. Navy personnel (communications unit)

USNS Sioux (T-ATF-171) is a United States Navy Powhatan-class fleet ocean tug in service since 1981.

Sioux was laid down on 22 March 1979 by the Marinette Marine Corporation at Marinette, Wisconsin. Launched on 15 November 1980, and delivered to the U.S. Navy on 1 May 1981, Sioux was assigned to the Military Sealift Command (MSC), and placed in non-commissioned service as USNS Sioux (T-ATF-171) in 1981.

Sioux is in active service.