Safety Flash
Recent DP incident onboard a DSV
Recent DP incident onboard a DSV
- IMCA
- Safety Flash
- IMCA SF 03/06
- DivingHuman FactorsManagement of ChangeMarine Operations
- Human factorsLoss of station keeping
- Diving operationsDynamic positioning
- Navigation and positioning equipment
- Management of changeOperating and work proceduresSafety communication
- Marine industry
- SubseaVessel
Summary
A diving support vessel lost position during open-water diving when exceptional wave action triggered rejection of all five DP position references. Investigation identified tighter prediction-error limits following a software upgrade and gaps in crew briefing and guidance. Recommendations address settings, reference reselection, operator familiarisation and fleet communication.
Classifications: Human factors; human performance; ergonomics.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Diving operations; diving; commercial diving.
Classifications: Dynamic positioning; DP; DP operations.
Classifications: Navigation and positioning equipment; ECDIS; AIS; chart plotters.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Subsea; underwater worksite.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
A software prediction feature rejected all vessel position references during rough-weather diving operations, causing substantial position loss.
IMCA SF 03/06. Themes: diving, human factors, management of change, marine operations.