BISON (IMO 9724271)
BISON is an Offshore Supply Ship built in 2015 and flying the United States of America flag, placing it in its 11th year of service. The vessel reports a deadweight tonnage of 1,608 metric tonnes, a gross tonnage of 1,170, and a length overall of 60 metres. This vessel is configured for offshore support operations. BISON is classed by the American Bureau of Shipping, which is an IACS member. The vessel has been observed in the Middle America and Gulf of Mexico region. It has previously operated under one former name and one former flag. Over the last 36 months it has had 1 port state control (PSC) inspection and no detentions. The most recent inspection was on 17 April 2026.
- Type: Offshore Supply Ship
- Flag: United States of America
- Year built: 2015
- MMSI: 367668680
- Call sign: WDH9496
- Gross tonnage: 1170
- Deadweight: 1608 t
- Length overall: 60 m
- Beam: 14 m
- Port State Control (PSC) inspections: 1 since 2026
- PSC detentions in the last 36 months: 0
- Last PSC inspection: 17/04/2026
- Registered owner · Ship manager · ISM manager: ADRIATIC MARINE LLC (USA)
- Last AIS position: 28°50.2′N · 089°24.0′W · Speed 0.2 kn · under way · received 14 October 2026 at 09:56 UTC
- Destination: SP-58.
Frequently asked questions
What is the vessel type of BISON?
BISON is an Offshore Supply Ship. It was built in 2015 and is currently in its 11th year of service.
What are the dimensions of BISON?
The vessel has a length overall of 60 metres and a beam of 14 metres. It has a gross tonnage of 1,170 and a deadweight tonnage of 1,608 metric tonnes.
Which classification society manages BISON?
BISON is classed by the American Bureau of Shipping. This society is an IACS member and the vessel's current status is Reinstated.
Where has BISON been operating recently?
The vessel has been observed in the Middle America and Gulf of Mexico regions. It currently flies the flag of the United States of America.
How many PSC inspections has BISON undergone?
Over the last 36 months it has had 1 port state control (PSC) inspection and no detentions, with no deficiencies recorded. The most recent inspection was on 17 April 2026. All-time records show 1 inspection since 2026 and no detentions.
Live AIS via Rynda — combined with classification, PSC, sanctions and ownership data.