Safety Flash
Fatal accident in connection with the operation of an A-frame based launch and recovery system (LARS) used for ROV operations
Fatal accident in connection with the operation of an A-frame based launch and recovery system (LARS) used for ROV operations
- IMCA
- Safety Flash
- IMCA SF 07/08
- Lifting OperationsLine of FireMachinery and EquipmentMarine Operations
- Crushing and pinch pointsFunctional safetyMechanical failurePressure systems
- Inspection and maintenanceROV operations
- Remotely operated vehicleValveWinch
- Energy and process isolation
- Marine industry
- Vessel
Summary
A safety flash describes a fatal trapping incident during ROV umbilical maintenance aboard a vessel in a floating dock. A blackout coincided with uncontrolled winch spooling that lifted the tether management system. Analysis identifies six interacting technical mechanisms and details wiring, controller software and hydraulic isolation modifications to improve emergency stopping.
Classifications: Crushing and pinch points; crush hazards; pinch points.
Classifications: Functional safety; safety instrumented systems; SIS.
Classifications: Mechanical failure; equipment failure.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: ROV operations; remotely operated vehicle operations.
Classifications: Remotely operated vehicle; ROV; underwater robot.
Classifications: Valve; valves.
Classifications: Winch; winches.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
A power blackout caused uncontrolled winch movement, trapping and fatally injuring an ROV supervisor.
IMCA SF 07/08. Themes: lifting operations, line of fire, machinery and equipment, marine operations.