High potential near-miss: Mooring rope parted

  • Safety Flash
  • Published on 15 June 2017
  • Generated on 23 July 2026
  • IMCA SF 15/17
  • 2 minute read

Mooring buoy rope parted while a vessel was moored. 

What happened?

The potential severity of the incident was categorised as “high” owing to the potential injuries that could have arisen had someone been in the snap back zone.

No injuries or damage to the vessel occurred apart from the parted mooring rope.

What was the cause?

Equipment failure following from wear & tear, in turn following from inadequate or insufficient routine inspection.

It was evident from inspection after the fact that the condition of the mooring rope was bad.

It was evident from inspection after the fact that the condition of the mooring rope was bad.
Equipment failure following from wear & tear, in turn following from inadequate or insufficient routine inspection.

What lessons were learned? And what were the actions?

  • Planned and regular inspection of mooring ropes.

  • If mooring ropes are found in poor condition, they should be taken out of use.

  • All crew associated with mooring operations should be properly informed and fully briefed with regard to:
    • the mooring operation in general

    • checking for defects with the ropes

    • proper precautions relating to keeping out of the snap back zone.

Members may wish to review a list of mooring-related incidents – this can be done by visiting IMCA's Safety Flashes webpage and entering the appropriate search text (e.g. parted mooring) in the Search box.

Members should be aware of existing IMCA documentation as follows:

Latest Safety Flashes:

MAIB: Catastrophic engine failure and subsequent fire

MAIB has published Accident Investigation Report 10/2026 into a catastrophic failure of a diesel generator engine on board the vessel Kommandor Susan.

Read more
BSEE: Compressed gas cylinder hazards

BSEE has published Safety Alert 516, relating to potential risks involving compressed gas cylinders.

Read more
MSF: dropped object inside vessel tank

MSF have published Safety Alert 26-05 relating to a tank cleaning machine coming lose and falling within a tank on a vessel.

Read more
Uncontrolled movement of cargo

During offshore cargo operations alongside a rig, a single pipe loaded on deck shifted due to vessel motion and swell conditions.

Read more
Positives – rubber seals on hatches, securing of shackle pins, fuel sample box

A Member reports a few positive findings.

Read more

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of the entire offshore industry.

The effectiveness of the IMCA Safety Flash system depends on the industry sharing information and so avoiding repeat incidents. Incidents are classified according to IOGP's Life Saving Rules.

All information is anonymised or sanitised, as appropriate, and warnings for graphic content included where possible.

IMCA makes every effort to ensure both the accuracy and reliability of the information shared, but is 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.

Share your safety incidents with IMCA online. Sign-up to receive Safety Flashes straight to your email.