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Trapping incident related to mooring system - DEV imca
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Trapping incident related to mooring system

IMCA has received a report of an incident onboard a platform supply vessel which resulted in a member of the crew fracturing his forearm. This was the consequence of an event that happened during activity in which the crew engaged frequently – a ‘routine’ activity.

While the vessel was preparing to enter port, two crew members became engaged in recovering ropes from the enclosed foc’sle head space onto the upper foc’sle head in preparation for mooring alongside. This operation involved the transfer of mooring ropes from the starboard to the port side of the vessel’s foc’sle head, using the ships anchor/mooring windlass. Under-turns on the windlass drum were used to improve the rope lead towards the port drum on the windlass. One cre member was driving the windlass with the other engaged with the rope at the drum end.

While putting a third turn onto the drum end, the crew member in that position lost his footing and, while steadying himself, found that his glove end had become trapped between the mooring rope and the drum end, causing his forearm to be pulled into the drum end. As a result, he received a fracture to his arm and was unable to continue at work. The potential was even worse.

The company has advised each of its vessel crews to review the task-based risk assessment used for preparation and stowage of mooring systems in advance of entry into or after departure from port, in order to maintain focus on the potential hazards associated with this type of activity.

The type and fitting of hand gloves (PPE) used by vessel crews should be examined to ensure that gloves remain reasonably tight-fitting on the wearer and also to ensure that any looseness in the finger area does not comprise the safety of the wearer.


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.

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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.