Safety Flash
Close approach of AHTS vessel to offshore rig
Close approach of AHTS vessel to offshore rig
- IMCA
- Safety Flash
- IMCA SF 12/23
- Human FactorsMarine OperationsVessel and Mooring
- Human factorsLoss of station keeping
- Anchor handling
- Operator displays and control interfaces
- Functional testingOperating and work proceduresOperational supervision
- Marine industry
- Vessel
Summary
During anchor handling, a sliding chaser collar pulled an AHTS vessel towards a rig’s mooring line. A disabled bow thruster initially prevented corrective manoeuvring; restoring all thrusters enabled safe withdrawal. The flash identifies uncommunicated machinery shutdown and missing control-transfer checks, and describes propulsion checks, bridge approval requirements and revised work instructions.
Classifications: Human factors; human performance; ergonomics.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Anchor handling; anchor deployment.
Classifications: Operator displays and control interfaces.
Classifications: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Operational supervision.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
During anchor handling operations for an offshore rig, the stern of an Anchor Handling Tug Supply (AHTS) vessel was pulled to starboard, resulting in a bow side close approach to a mooring line
IMCA SF 12/23. Themes: human factors, marine operations, vessel and mooring.