Investigation Report
Grounding of semi-submersible rig Transocean Winner after the loss of tow from tug ALP Forward
Grounding of semi-submersible rig Transocean Winner after the loss of tow from tug ALP Forward
- MAIB
- Investigation Report
- Marine OperationsVessel and Mooring
- CorrosionMaterial fatigueMechanical failureVessel grounding
- Inspection and maintenanceNavigationTowing
- WinchWire rope
- Emergency responseIndependent audit and verificationOperating and work proceduresSafety communication
- Marine industry
- Vessel
Summary
Investigation of Transocean Winner’s grounding off the Isle of Lewis after loss of tow from ALP Forward. Analysis examines weather-driven loss of control, deteriorated wire rope, catenary and shock loading, missing windage information, passage planning and emergency towing limitations. Recommendations address towing procedures, reporting and tow-line maintenance.
Classifications: Corrosion; corrosion damage.
Classifications: Material fatigue; metal fatigue.
Classifications: Mechanical failure; equipment failure.
Classifications: Vessel grounding.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Navigation; vessel navigation; passage planning.
Classifications: Towing; towage.
Classifications: Winch; winches.
Classifications: Wire rope; steel wire rope.
Classifications: Emergency response; emergency preparedness.
Classifications: Independent audit and verification.
Classifications: Operating and work procedures.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Themes: marine operations, vessel and mooring.