Safety Flash
Uncontrolled ascent of spool and diver during a lifting bag operation
Uncontrolled ascent of spool and diver during a lifting bag operation
- IMCA
- Safety Flash
- IMCA SF 15/08
- Control of WorkDivingLifting OperationsLine of Fire
- Line of fire
- Diving operationsLifting operationsRigging
- Diver umbilical
- Evacuation, escape and rescueOperating and work proceduresPositive retention and reliable securing
- Subsea
Summary
A diver became entangled in an air lift bag inverter line as a pipe spool ascended uncontrollably. Umbilical damage restricted gas flow and severed communications. He used emergency gas and cut himself free; no injuries were sustained. The investigation identified missing hold-back rigging and unclear sequencing in the dive plan.
Classifications: Line of fire; struck-by hazards.
Classifications: Diving operations; diving; commercial diving.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Diver umbilical; diving umbilical.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Subsea; underwater worksite.
Summary
An inadequately restrained spool and lift bags ascended unexpectedly, entangling a diver and damaging his umbilical.
IMCA SF 15/08. Themes: control of work, diving, lifting operations, line of fire.