.jpg) USNS Sioux (T-ATF-171) entering Yokosuka Naval Base, 1984
| |
| History | |
|---|---|
 United States | |
| Name | USNS Sioux |
| 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 |
| Out of service | 2021 |
| Stricken | 30 September 2021 |
| Identification |
|
| Status | Stricken, Final Disposition Pending |
| General characteristics | |
| Class and type | Powhatan-class tugboat |
| Displacement | 2,260 long tons (2,296 t) fully loaded |
| Length | 226 ft (69 m) |
| Beam | 42 ft (13 m) |
| Draft | 15 ft (4.6 m) |
| Installed power | 5.73 megawatts (7,680 hp) sustained |
| Propulsion | 2 × General Motors EMD 20-645F7B diesel engines, two shafts with hydraulic adjustable pitch props ; Brunvoll bow thruster, 224 kW (300 hp) |
| Speed | 15 knots (28 km/h; 17 mph) |
| Complement | 16 civilians plus 4 U.S. Navy personnel (communications unit) |
USNS Sioux (T-ATF-171) was a United States Navy Powhatan-class tugboat operated by the Military Sealift Command (MSC). She was in service from 1981 to 2021 and spent the bulk of this time supporting the Pacific Fleet.