American Mariner

Identity & particulars

Name

American Mariner

IMO numberWhat is an IMO number?

7812567

MMSIWhat is an MMSI?

366938710

Call signWhat is a call sign?

WQZ7791

Flag

United States

Vessel type

WikidataDetailed type from WikidataBulk carrier

AIS ship type

Cargo

Gross tonnageGross tonnage vs deadweight

15,396

Length overall

222 m

Beam

23 m

Year built

1978

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.

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.

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.

Incidents & investigations Authority-reported

Accident and incident reports by national investigation boards, and casualty warnings, that concern this ship. Each links to the original.

• Occurred Mar 28, 2024Cargo, Dry BulkNTSB marine investigations (CAROL)Munuscong, MI, USAPossible match

  American Mariner, Munuscong, MI, USA (NTSB DCA24FM032)Report published May 13, 2025

  The National Transportation Safety Board determines that the probable cause of the contact of the bulk carrier American Mariner with the Munuscong Channel Junction Light was O-ring-type material debris in the steering gear system’s hydraulic oil becoming lodged within a control motor, which caused it to seize, resulting in the rudder locking at its last ordered position.

  The report names a ship "American Mariner" but prints no IMO number; the name matches this vessel only. It may be a different ship.

• Occurred Jan 7, 2023Cargo, Dry BulkNTSB marine investigations (CAROL)Sault Ste. Marie, CA

  American Mariner, Sault Ste. Marie, CA (NTSB DCA23FM013)Report published Jul 23, 2024

  The National Transportation Safety Board determines that the probable cause of the grounding of the bulk carrier American Mariner was the master maneuvering the vessel away from the dock and into the channel while alone on the bridge, which required him to multitask (navigation, steering, and lookout duties) and resulted in the vessel overshooting the turn into the channel and running aground on t

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.

About American Mariner

MV American Mariner is a diesel-powered lake freighter owned and operated by the American Steamship Company (ASC). This vessel was built in 1980 at Bay Shipbuilding Company, Sturgeon Bay, Wisconsin and included self-unloading technology. The ship is 730 feet (220 m) long and 78 feet (24 m) wide, with a carrying capacity of 37,300 tons (at midsummer draft), limestone, grain, coal or iron ore.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is American Mariner now?

American Mariner (Bulk carrier, United States flag) was last seen on AIS on Oct 6, 2026, 15:16 UTC, under way at 11.2 kn, near Windsor (Great Lakes). The crew-entered destination was CALCITE (voyage report via AISstream.io global terrestrial AIS, received Oct 6, 2026, 14:57 UTC). This report does not confirm the ship’s current route.

What kind of ship is American Mariner?

American Mariner is a bulk carrier sailing under the flag of United States, built in 1978 by Bay Shipbuilding Company. The vessel is 222 m long with a beam of 23 m and has a gross tonnage of 15,396.

Who is recorded as the owner or manager of American Mariner?

AMERICAN STEAMSHIP COMPANY is recorded as Managing owner (USCG) for American Mariner (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 American Mariner?

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