Investigation Report
Parting of mooring line between shuttle tanker Randgrid and monobuoy resulting in discharge of 12 tonnes of crude oil
Parting of mooring line between shuttle tanker Randgrid and monobuoy resulting in discharge of 12 tonnes of crude oil
- MAIB
- Investigation Report
- Unknown
- Hydrocarbon ReleaseMarine OperationsVessel and Mooring
- Human factorsHydrocarbon releaseLoss of station keeping
- Cargo transferDynamic positioningMooring operations
- HoseMooring fittingsMooring linesOperator displays and control interfaces
- Emergency responseHuman-centred designOperating and work procedures
- Marine industry
- Vessel
Summary
Investigation of Randgrid’s mooring release at the Tetney monobuoy during cargo discharge. Accidental operation of chain stopper controls released the chafing chain; the pickup-rope lashing subsequently failed and discharge hoses broke away. An estimated spill of about 12 tonnes occurred without injury. Recommendations address control design, alarms and bridge procedures.
Classifications: Human factors; human performance; ergonomics.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Cargo transfer; cargo handling.
Classifications: Dynamic positioning; DP; DP operations.
Classifications: Mooring operations; berthing; unmooring.
Classifications: Hose; flexible hose.
Classifications: Mooring fittings; cleats; bollards.
Classifications: Mooring lines; mooring rope; mooring wire.
Classifications: Operator displays and control interfaces.
Classifications: Emergency response; emergency preparedness.
Classifications: Human-centred design.
Classifications: Operating and work procedures.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Themes: hydrocarbon release, marine operations, vessel and mooring.