Safety Flash
Unexpected descent and ascent of mattress lifting frame
Unexpected descent and ascent of mattress lifting frame
- IMCA
- Safety Flash
- IMCA SF 19/23
- Competence and TrainingCrane and RiggingLifting OperationsMachinery and Equipment
- Human factorsLine of fire
- Diving operationsLifting operations
- CraneLifting accessoriesOperator displays and control interfaces
- Competence and trainingHuman-centred designOperating and work proceduresSafety communication
- Marine industry
- Subsea
Summary
A mattress handling frame descended and abruptly ascended near divers during crane operations in active heave compensation mode. No injuries or damage occurred. The flash identifies controller-lock software interactions, obsolete operating manuals and inadequate familiarisation, with actions addressing revision control, operator briefings and protection of the controller-lock button.
Classifications: Human factors; human performance; ergonomics.
Classifications: Line of fire; struck-by hazards.
Classifications: Diving operations; diving; commercial diving.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Operator displays and control interfaces.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Human-centred design.
Classifications: Operating and work procedures.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Subsea; underwater worksite.
Summary
While concrete mattresses were being moved using a mattress handling frame and the main crane, the frame began moving close to working divers with no intervention from the crane operator
IMCA SF 19/23. Themes: competence and training, crane and rigging, lifting operations, machinery and equipment.