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Diver entrapment - DEV imca
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Diver entrapment

A member has reported an incident wherein a diver became trapped by a water jet weight coat removal (WCR) tool, which he was attempting to secure to a twenty inch subsea pipeline.

The WCR tool had been landed directly onto the pipeline, rather than the seabed as had been originally planned. During operations to secure the WCR tool, the tool moved on the pipeline, trapping the diver.

An airbag was attached to the WCR tool and inflated to allow the WCR tool to rotate on the pipeline and free the diver.

The diver was freed without sustaining any injury.

The resulting investigation identified the immediate cause of the incident being the failure to adhere to the prescribed task plan/operational risk assessment, with underlying causes identified as follows:

  • The management of change procedure was not followed;
  • There was a lack of understanding of possible hazards related to positioning of the WCR tool;
  • The task plan was not followed;
  • The risk was not fully assessed.

Members are reminded of the importance of following procedures; taking time out for safety and following management of change procedures.

Safety Event

Published: 5 March 2009
Download: IMCA SF 03/09

IMCA Safety Flashes
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IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding safetyreports@imca-int.com to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.

IMCA’s store terms and conditions (https://www.imca-int.com/legal-notices/terms/) apply to all downloads from IMCA’s website, including this document.

IMCA makes every effort to ensure the accuracy and reliability of the data contained in the documents it publishes, but IMCA shall not be liable for any guidance and/or recommendation and/or statement herein contained. The information contained in this document does not fulfil or replace any individual’s or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.