Where is Transocean Marianas now?

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

What kind of ship is Transocean Marianas?

Transocean Marianas is a ship, built in 1979 by Mitsubishi Heavy Industries. The vessel is 91.4 m long and has a gross tonnage of 20,461.

What sanctions and inspection records does Voydar hold for Transocean Marianas?

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

Transocean Marianas

ship · built 1979

IMO8757960No AIS position on record

Open in Terminal

In short

Transocean Marianas (ship) has no AIS position on record with Voydar.

Vessel type: ship
Flag: —
Year built: 1979
Gross tonnage: 20,461
Size (length × beam): 91 m
Registered owner: —

Watch this ship

Transocean Marianas has not been received for a while. Follow it and we will email you as soon as it is heard again, then when it reaches or leaves port.

Free forever. No card. A free account follows up to 5 ships and ports.

Last reported position

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

A year of history in the Terminal (Plus) · the full archive since June 1, 2026 (Pro)Free forever. No card. New accounts include 14 days of Pro.

Try the live demo, no sign-up

Identity & particulars

Name: Transocean Marianas
IMO numberWhat is an IMO number?: 8757960
MMSIWhat is an MMSI?: —
Call signWhat is a call sign?: —
Flag: —
Vessel type: ship
Gross tonnageGross tonnage vs deadweight: 20,461
Length overall: 91.4 m
Beam: —
Year built: 1979

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.

Builder: Mitsubishi Heavy Industries
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
Aug 13, 2010	Reported departure from PASCAGOULA HARBOR, MSAuthority-reported	USACE foreign traffic vessel entrances & clearances
Jun 23, 2010	Reported arrival at PASCAGOULA HARBOR, MSAuthority-reported	USACE foreign traffic vessel entrances & clearances
Dec 20, 2009	Reported departure from PASCAGOULA HARBOR, MSAuthority-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
PASCAGOULA HARBOR, MS	Departure	Aug 13, 2010(date only)	—	USACE foreign traffic vessel entrances & clearances
PASCAGOULA HARBOR, MS	Arrival	Jun 23, 2010(date only)	—	USACE foreign traffic vessel entrances & clearances
PASCAGOULA HARBOR, MS	Departure	Dec 20, 2009(date only)	—	USACE foreign traffic vessel entrances & clearances
PASCAGOULA HARBOR, MS	Arrival	Nov 28, 2009(date only)	—	USACE foreign traffic vessel entrances & clearances
Galveston USGLS	Departure	Sep 29, 2009(date only)	—	USACE foreign traffic vessel entrances & clearances
Galveston USGLS	Arrival	Aug 12, 2009(date only)	—	USACE foreign traffic vessel entrances & clearances
PASCAGOULA HARBOR, MS	Departure	Oct 31, 2008(date only)	—	USACE foreign traffic vessel entrances & clearances
PASCAGOULA HARBOR, MS	Arrival	Sep 21, 2008(date only)	—	USACE foreign traffic vessel entrances & clearances
Corpus Christi USCRP	Departure	Sep 1, 2006(date only)	—	USACE foreign traffic vessel entrances & clearances
Corpus Christi USCRP	Arrival	Aug 24, 2006(date only)	—	USACE foreign traffic vessel entrances & clearances
Brownsville USBRO	Departure	Apr 2, 2006(date only)	—	USACE foreign traffic vessel entrances & clearances

Records published by the authority named on each row. Earliest record for this ship: April 2, 2006.

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

About Transocean Marianas

Transocean Marianas was an Earl & Wright Sedco 700 design semi-submersible platform drilling unit capable of operating in harsh environments and water depths up to 7,000 feet (2,100 m) using a 47.6 cm (18.75 in), 15,000 psi blowout preventer (BOP), and a 53 cm (21 in) outside diameter (OD) marine riser. Transocean Marianas has operated under several names: Tharos from 1979 to 1994, Polyportia from 1994 to 1996, and P. Portia from 1996 to 1998. On October 7, 2009, it began drilling on the Macondo well in the Gulf of Mexico. On November 9, 2009. it was damaged by Hurricane Ida. It was subsequently replaced by the Deepwater Horizon, which was responsible for the Deepwater Horizon oil spill when that rig exploded on April 20, 2010.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is Transocean Marianas now?: Voydar has no displayable AIS position for Transocean Marianas in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.
What kind of ship is Transocean Marianas?: Transocean Marianas is a ship, built in 1979 by Mitsubishi Heavy Industries. The vessel is 91.4 m long and has a gross tonnage of 20,461.
What sanctions and inspection records does Voydar hold for Transocean Marianas?: Voydar has no matched sanctions record displayed for Transocean Marianas 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 Transocean Marianas. Missing records do not establish whether the ship has been detained.

Use this data

This page is also available as JSON, free, with the source and licence of every section. Sections whose sources do not permit redistribution are listed as withheld.

GET /api/v1/vessels/8757960

View JSON API documentationFree without a key for occasional use; use an API key for more.

Follow by RSS Open data

Using this data in code?

Every account gets a personal API allowance: 2,500 credits a month free, 25,000 with Pro. Pro adds internal business use; API plans add building the data into your own products.

See plans