Where is USNS Sioux now?

Voydar has no displayable AIS position for USNS Sioux in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.

What kind of ship is USNS Sioux?

USNS Sioux is a tug, built in 1981 by Marinette Marine. The vessel is 59.4 m long.

What sanctions and inspection records does Voydar hold for USNS Sioux?

Voydar has no matched sanctions record displayed for USNS Sioux from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels, the New Zealand Russia Sanctions Register and the French national asset-freeze register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for USNS Sioux. Missing records do not establish whether the ship has been detained.

USNS Sioux

Tug · built 1981

IMO8835475No AIS position on record

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In short

USNS Sioux (Tug) has no AIS position on record with Voydar.

Vessel type: Tug
Flag: —
Year built: 1981
Gross tonnage: —
Size (length × beam): 59 m
Registered owner: —

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Last reported position

No AIS position on record for this vessel. Identity and particulars are below.

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Identity & particulars

Name: USNS Sioux
IMO numberWhat is an IMO number?: 8835475
MMSIWhat is an MMSI?: —
Call signWhat is a call sign?: —
Flag: —
Vessel type: Tug
Gross tonnageGross tonnage vs deadweight: —
Length overall: 59.4 m
Beam: —
Year built: 1981

A tag next to a value names the register that supplied it (hover or tap it for the record and date). Values without a tag come from the ship's own AIS broadcasts or from Wikidata. Position and identity are derived live from AIS.

Ownership & management

Each line shows where the fact comes from. Links backed by an identifier point to the company page.

Operator: United States Navy
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026
Builder: Marinette Marine
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026

About USNS Sioux

USNS Sioux (T-ATF-171) is a United States Navy Powhatan-class tugboat formerly 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.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is USNS Sioux now?: Voydar has no displayable AIS position for USNS Sioux in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.
What kind of ship is USNS Sioux?: USNS Sioux is a tug, built in 1981 by Marinette Marine. The vessel is 59.4 m long.
What sanctions and inspection records does Voydar hold for USNS Sioux?: Voydar has no matched sanctions record displayed for USNS Sioux from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels, the New Zealand Russia Sanctions Register and the French national asset-freeze register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for USNS Sioux. Missing records do not establish whether the ship has been detained.

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