SIEM OPAL is an Offshore Tug/Supply Ship built in 2011 and flying the Norway flag, placing it in its 15th year of service. The vessel reports a deadweight tonnage of 4,250 metric tonnes, a gross tonnage of 7,473, and a length overall of 91 metres. This configuration is typical for specialized offshore support and towing operations. SIEM OPAL is classed by DNV-GL (ex DNV), which is a member of the International Association of Classification Societies. The vessel has been observed in West Europe and North Europe over recent periods. It has previously operated under one former name and one former flag. Over the last 36 months it has had 2 port state control (PSC) inspections and no detentions. The most recent inspection was on 28 August 2025.
The vessel has a length overall of 91 metres and a beam of 22 metres. It operates with a maximum draught of 7.97 metres.
SIEM OPAL has a deadweight tonnage of 4,250 metric tonnes. Its gross tonnage is recorded at 7,473.
The vessel is classed by DNV-GL (ex DNV), which is an IACS member. Its current class status is listed as Delivered.
The vessel has been observed in West Europe and North Europe. These regions represent its most recent recorded geographic areas of operation.
Over the last 36 months it has had 2 port state control (PSC) inspections and no detentions. The most recent inspection was on 28 August 2025. All-time records show 12 inspections since 2011 and no detentions.
Live AIS via Rynda — combined with classification, PSC, sanctions and ownership data.