Safety Flash
Surface decompression near-miss
Surface decompression near-miss
- IMCA
- Safety Flash
- IMCA SF 13/22
- Competence and TrainingDivingHuman Factors
- Human factorsPressure systems
- Diving operations
- Operator displays and control interfacesPressure vesselValve
- Alarm managementOperating and work proceduresOperational supervision
Summary
A surface decompression near-miss involved an unintended chamber depth reduction from 12msw to 5msw following a SURDO2 dive. Divers remained symptom-free. The account identifies an incompletely closed exhaust valve and supervisor distraction, and describes revised operating responsibilities, venting and depth alarms, and camera monitoring.
Classifications: Human factors; human performance; ergonomics.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Diving operations; diving; commercial diving.
Classifications: Operator displays and control interfaces.
Classifications: Pressure vessel; pressure vessels.
Classifications: Valve; valves.
Classifications: Alarm management.
Classifications: Operating and work procedures.
Classifications: Operational supervision.
Summary
Following a SURDO2 42msw/40min dive, the depth of the chamber was unintentionally decreased from 12msw to 5msw.
IMCA SF 13/22. Themes: competence and training, diving, human factors.