Marine Operations Safety Analysis

Incident Overview: PSV Operational Issues

• Sudden winds of 40 knots created strong external forces affecting PSV (Platform Supply Vessel) stability.
• PSV lost position due to increased thruster wash and lost its dynamic positioning (DP) signal.
• Operating procedures violated; PSV functioning outside its Activity Specific Operation Guidelines (ASOG).
• Critical alarms were ignored, leading to continuation of operations despite the PSV being out of operational limits.

Lessons Learned: PSV Incident

• Need to review ASOG to account for the effects of thruster wash during vessel-to-vessel operations.
• Procedures for lifting cargo to/from PSVs must be updated to prevent loss of position.
• Empower DP operations personnel to thoroughly review and document compliance with ASOG.

Incident Overview: Dropped Extraction Hood

• A 215 kg welding fume extraction hood fell onto a work station, striking a crew member from behind.
• Impact could have caused serious injuries or fatalities if positioned differently.
• In-house modifications led to non-compliance with company procedures regarding the hood's design and securing methods.

Lessons Learned: Extraction Hood Incident

• Fume extraction design flaws demonstrated the need for strict adherence to safety protocols in modifications.
• Importance of ensuring correct securing methods to prevent equipment collapse during operations.

Incident Overview: Methanol Carrying on Workboats

• Vessel carried over 700 liters of methanol without possessing the required Dangerous Goods Document of Compliance (DG DOC).
• Lack of risk assessment and method statement regarding methanol transport raised safety concerns.
• Industry revealed a trend of using smaller vessels for transporting hazardous materials, indicating a broader issue with compliance and awareness.

Lessons Learned: Methanol Transport Incident

• Strict regulatory compliance required for transporting Methanol and other Dangerous Goods.
• Raise awareness within marine and offshore renewable sectors about the proper handling of Dangerous Goods.

Incident Overview: Hydrogen Sulphide Exposure

• Subcontractors were exposed to high concentrations of Hydrogen Sulphide (H₂S) during maintenance in the Well Treatment System room.
• An unexpected pressure release from an acid filter unit triggered an H₂S alarm; personnel evacuated without immediate health impacts.
• Broken pressure gauges and chemical residues allowed H₂S to form, despite pre-work safety checks.

Lessons Learned: H₂S Exposure Incident

• Regularly assess and monitor potential H₂S exposure sources in workplaces, particularly with chemical and sewage systems.
• Ensure all personnel are trained in H₂S hazards and response protocols.
• Implement clear signage and training to prevent unauthorized re-entry into H₂S-threatened areas.