Safety Flash
Unexpected movement of conductor during diver dredging operations
Unexpected movement of conductor during diver dredging operations
- IMCA
- Safety Flash
- IMCA SF 29/21
- Control of WorkDivingManagement of ChangeMarine Operations
- Line of fireRisk management
- Diving operations
- Diver umbilicalLifting accessories
- Management of changePositive retention and reliable securingRisk assessment
- Upstream oil and gas
- Subsea
Summary
During diver dredging before conductor cutting, a conductor toppled at a severance point, leaving an umbilical spanning between conductors. Crane restraint and vessel manoeuvring enabled release without injury or damage. The flash identifies incomplete task information and recommends conductor restraint, data verification, revised risk assessment and improved change management.
Classifications: Line of fire; struck-by hazards.
Classifications: Risk management; risk evaluation.
Classifications: Diving operations; diving; commercial diving.
Classifications: Diver umbilical; diving umbilical.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Management of change; MOC; change management.
Classifications: Positive retention and reliable securing.
Classifications: Risk assessment; hazard assessment.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Subsea; underwater worksite.
Summary
An unexpectedly moving conductor threatened a diver’s umbilical during dredging, exposing gaps in task information and change management.
IMCA SF 29/21. Themes: control of work, diving, management of change, marine operations.