What kind of ship is ATB LIBERTY?

ATB LIBERTY is a tug sailing under the flag of United States, built in 2012. The vessel is 214 m long with a beam of 32 m and has a gross tonnage of 2,164.

What sanctions and inspection records does Voydar hold for ATB LIBERTY?

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

ATB LIBERTY

Tug · United States · built 2012 · AIS Class A

IMO9601821MMSI369109000Call signWDG3575Last AIS position Oct 3, 2026, 01:56 UTC

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In short

ATB LIBERTY (Tug, United States flag) was last seen on AIS on Oct 3, 2026, 01:56 UTC, under way at 12.8 kn, in the North Atlantic Ocean. Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. Its last detected port call was at Tampa: arrived Sep 25, 2026, left Sep 26, 2026. Managing owner (USCG): MARATHON BLUE WATER HOLDINGS LLC (source: US Coast Guard — Merchant Vessels of the United States (documented vessels)).

Vessel type: Tug
Flag: United States
Year built: 2012
Gross tonnage: 2,164
Size (length × beam): 214 m × 32 m
Managing owner (USCG): MARATHON BLUE WATER HOLDINGS LLC

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Last reported position

received Oct 3, 2026, 01:56 UTC

Position: 25.7491° N, 79.8656° W
Area: North Atlantic Ocean
StatusWhat do AIS statuses mean?: Under way using engine
Speed: 12.8 kn
Course: 4°
Heading: 5°

25.7491° N, 79.8656° W

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Last 30 days: 2 port calls (Tampa and Port Manatee).

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: ATB LIBERTY
IMO numberWhat is an IMO number?: 9601821
MMSIWhat is an MMSI?: 369109000
Call signWhat is a call sign?: WDG3575
Flag: United States
Vessel type: Tug
AIS ship type: Towing
Gross tonnageGross tonnage vs deadweight: 2,164
Deadweight (DWT): Source: Wikidata, record Q104515626. Added to Voydar on September 23, 2026. Licence: CC0 1.0.2,366 t
Length overall: 214 m
Beam: 32 m
Year built: 2012

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.

Managing owner (USCG): MARATHON BLUE WATER HOLDINGS LLC(not linked to a company record)
Source: US Coast Guard — Merchant Vessels of the United States (documented vessels) · reported · confidence 0.9 · retrieved Oct 6, 2026Coast Guard documentation record (2026-09 file) matched to this ship by IMO number and call sign. The managing owner is the company the Coast Guard has on record for the ship's certificate of documentation.
Ship radio licensee (FCC): FAIRWATER TANKER MANAGEMENT LLC(not linked to a company record)
Source: FCC Universal Licensing System — ship station licences · since 2022 · reported · confidence 0.9 · retrieved Oct 6, 2026Licence matched to this ship by MMSI and call sign. The licensee holds the radio licence; it is not necessarily the owner.

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
Sep 26, 2026, 02:39 UTC	Left TampaAIS-detected	Voydar port-call detector (AIS geofence)
Sep 25, 2026, 02:54 UTC	Arrived at TampaAIS-detected	Voydar port-call detector (AIS geofence)
Sep 25, 2026, 00:24 UTC	Left Port ManateeAIS-detected	Voydar port-call detector (AIS geofence)
Sep 24, 2026, 00:26 UTC	Arrived at Port ManateeAIS-detected	Voydar port-call detector (AIS geofence)

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.

Detected from AIS AIS-detected

Port	Arrived	Departed	Time in port
Tampa USTPA	Sep 25, 2026, 02:54 UTC	Sep 26, 2026, 02:39 UTC	23 h 45 min
Port Manatee USPME	Sep 24, 2026, 00:26 UTC	Sep 25, 2026, 00:24 UTC	23 h 58 min

Detected by Voydar when the ship's AIS positions stayed slow inside a harbour area. Calls shorter than 30 minutes are not shown. Depends on AIS reception; detection started on June 8, 2026.

Behaviour at sea Voydar-derived

Patterns Voydar derived from this ship's AIS broadcasts. They are inferences, not reports: each one shows how it was computed and how confident we are, and none of them says why a ship behaved this way.

When	What we observed	Confidence
Sep 24, 2026, 12:56 UTC	Draught change Reported draught went from 11.6 m to 8.5 m while in port at Port Manatee. Voydar infers the ship probably discharged cargo. Method seadar.behaviour.draught_change v1	High (75%)

When

What we observed

Confidence

Sep 24, 2026, 12:56 UTC

Draught change

Reported draught went from 11.6 m to 8.5 m while in port at Port Manatee. Voydar infers the ship probably discharged cargo.

Method seadar.behaviour.draught_change v1

High (75%)

Source: AISstream.io global terrestrial AIS. AIS data: AISstream.io. Licence: none published.

Derived from AIS positions of feeds whose terms allow display on Voydar. Coverage is terrestrial: gaps are reported only where our receivers kept hearing other ships. Detections below medium confidence are not shown.

How these are computed →

Frequently asked questions

Where is ATB LIBERTY now?: ATB LIBERTY (Tug, United States flag) was last seen on AIS on Oct 3, 2026, 01:56 UTC, under way at 12.8 kn, in the North Atlantic Ocean. Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report.
What kind of ship is ATB LIBERTY?: ATB LIBERTY is a tug sailing under the flag of United States, built in 2012. The vessel is 214 m long with a beam of 32 m and has a gross tonnage of 2,164.
Who is recorded as the owner or manager of ATB LIBERTY?: MARATHON BLUE WATER HOLDINGS LLC is recorded as Managing owner (USCG) for ATB LIBERTY (source: US Coast Guard — Merchant Vessels of the United States (documented vessels)). This source record does not independently confirm today’s ownership or management.
What sanctions and inspection records does Voydar hold for ATB LIBERTY?: Voydar has no matched sanctions record displayed for ATB LIBERTY 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 ATB LIBERTY. Missing records do not establish whether the ship has been detained.

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