What kind of ship is USNS Impeccable?

USNS Impeccable is a research vessel sailing under the flag of United States, built in 2001 by American Ship Building Company. The vessel is 85.8 m long and has a gross tonnage of 5,484.

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

Voydar has no matched sanctions record displayed for USNS Impeccable 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 Impeccable. Missing records do not establish whether the ship has been detained.

USNS Impeccable

Research vessel · United States · built 2001 · AIS Class A

IMO9249647MMSI338823000Call signNINTLast AIS position Sep 30, 2026, 01:22 UTC

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In short

USNS Impeccable (Research vessel, United States flag) was last seen on AIS on Sep 30, 2026, 01:22 UTC, moored, near Yokohama (North Pacific Ocean). Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. Its crew-entered AIS destination is JP Y0K OS; its reported draught is 8.1 m (voyage report via AISstream.io global terrestrial AIS, received Sep 30, 2026, 01:36 UTC).

Vessel type: Research vessel
Flag: United States
Year built: 2001
Gross tonnage: 5,484
Size (length × beam): 86 m
Registered owner: —

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Photo of USNS Impeccable — Photo: US Navy, Military Sealift Command · Licence: Public domain · via Wikimedia Commons

Last reported position

received Sep 30, 2026, 01:22 UTC

Position: 35.4607° N, 139.6494° E
Area: North Pacific Ocean
StatusWhat do AIS statuses mean?: Moored
Speed: 0.4 kn
Course: 191°
Heading: 177°

35.4607° N, 139.6494° E

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Voydar detected no port call in the last 30 days.

Port calls are detected by Voydar from AIS (at least 30 minutes slow inside a harbour area); see Port calls below.

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Identity & particulars

Name: USNS Impeccable
IMO numberWhat is an IMO number?: 9249647
MMSIWhat is an MMSI?: 338823000
Call signWhat is a call sign?: NINT
Flag: United States
Vessel type: Research vessel
AIS ship type: Reserved
Gross tonnageGross tonnage vs deadweight: 5,484
Length overall: 85.8 m
Beam: —
Year built: 2001

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: American Ship Building Company
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026

Timeline

Dated events for this ship from every source Voydar holds, newest first. Each line names its source; derived items say how they were derived.

Date	Event	Source
Mar 3, 2004	Reported departure from HonoluluAuthority-reported	USACE foreign traffic vessel entrances & clearances

Owner, operator and manager changes found by comparing yearly EU MRV reports are dated to the reporting year ("during 2025"), not to a day. Port calls here are the most recent only; the full lists are further down.

Port calls

Two kinds of evidence, kept apart: calls Voydar detected from the ship's AIS positions, and arrivals and departures published by port authorities and customs records.

Reported by authorities Authority-reported

Port	Record	Date (UTC)	Berth	Source
Honolulu USHNL	Departure	Mar 3, 2004(date only)	—	USACE foreign traffic vessel entrances & clearances

Records published by the authority named on each row. Earliest record for this ship: March 3, 2004.

Source: US Army Corps of Engineers, Waterborne Commerce Statistics Center (US CBP entrance/clearance records). Licence: US Government work — public domain.

About USNS Impeccable

USNS Impeccable (T-AGOS-23) is an Impeccable-class ocean surveillance ship acquired by the U.S. Navy in 2001 and assigned to Military Sealift Command's Special Missions Program.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is USNS Impeccable now?: USNS Impeccable (Research vessel, United States flag) was last seen on AIS on Sep 30, 2026, 01:22 UTC, moored, near Yokohama (North Pacific Ocean). Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. The crew-entered destination was JP Y0K OS (voyage report via AISstream.io global terrestrial AIS, received Sep 30, 2026, 01:36 UTC). This report does not confirm the ship’s current route.
What kind of ship is USNS Impeccable?: USNS Impeccable is a research vessel sailing under the flag of United States, built in 2001 by American Ship Building Company. The vessel is 85.8 m long and has a gross tonnage of 5,484.
What sanctions and inspection records does Voydar hold for USNS Impeccable?: Voydar has no matched sanctions record displayed for USNS Impeccable 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 Impeccable. Missing records do not establish whether the ship has been detained.

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