Where is GSF Explorer now?

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

What kind of ship is GSF Explorer?

GSF Explorer is an offshore unit, built in 1973 by Sun Shipbuilding & Drydock Company. The vessel is 188.6 m long with a beam of 35.3 m and has a gross tonnage of 27,686.

What sanctions and inspection records does Voydar hold for GSF Explorer?

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

GSF Explorer

Offshore unit · built 1973

IMO7233292No AIS position on record

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In short

GSF Explorer (Offshore unit) has no AIS position on record with Voydar.

Vessel type: Offshore unit
Flag: —
Year built: 1973
Gross tonnage: 27,686
Size (length × beam): 189 m × 35 m
Registered owner: —

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Photo of GSF Explorer — Photo: U.S. Government · Licence: Public domain · via Wikimedia Commons

Last reported position

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

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Identity & particulars

Name: GSF Explorer
IMO numberWhat is an IMO number?: 7233292
MMSIWhat is an MMSI?: —
Call signWhat is a call sign?: —
Flag: —
Vessel type: Offshore unit
Gross tonnageGross tonnage vs deadweight: 27,686
Length overall: 188.6 m
Beam: 35.3 m
Year built: 1973

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: Sun Shipbuilding & Drydock 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
May 7, 2007	Reported departure from ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICOAuthority-reported	USACE foreign traffic vessel entrances & clearances
May 7, 2007	Reported arrival at ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICOAuthority-reported	USACE foreign traffic vessel entrances & clearances
Mar 18, 2006	Reported arrival at MobileAuthority-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
ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICO	Departure	May 7, 2007(date only)	—	USACE foreign traffic vessel entrances & clearances
ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICO	Arrival	May 7, 2007(date only)	—	USACE foreign traffic vessel entrances & clearances
Mobile USMOB	Arrival	Mar 18, 2006(date only)	—	USACE foreign traffic vessel entrances & clearances
ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICO	Departure	Apr 1, 2005(date only)	—	USACE foreign traffic vessel entrances & clearances
ATCHAFALAYA RIVER, LA MORGAN CITY TO GULF OF MEXICO	Arrival	Mar 31, 2005(date only)	—	USACE foreign traffic vessel entrances & clearances

Records published by the authority named on each row. Earliest record for this ship: March 31, 2005.

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

About GSF Explorer

GSF Explorer, formerly USNS Hughes Glomar Explorer (T-AG-193), was a deep-sea drillship platform built for Project Azorian, the secret 1974 effort by the Central Intelligence Agency's Special Activities Division to recover the Soviet submarine K-129.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is GSF Explorer now?: Voydar has no displayable AIS position for GSF Explorer in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.
What kind of ship is GSF Explorer?: GSF Explorer is an offshore unit, built in 1973 by Sun Shipbuilding & Drydock Company. The vessel is 188.6 m long with a beam of 35.3 m and has a gross tonnage of 27,686.
What sanctions and inspection records does Voydar hold for GSF Explorer?: Voydar has no matched sanctions record displayed for GSF Explorer from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels and the New Zealand Russia Sanctions Register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for GSF Explorer. Missing records do not establish whether the ship has been detained.

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