Fatality: Crew member crushed between TMS and snubber ring

  • Safety Flash
  • Published on 19 October 2017
  • Generated on 4 August 2026
  • IMCA SF 25/17
  • 1 minute read

During a maintenance operation, a member of an ROV crew sustained fatal injuries when he was trapped between the top of the tether management system (TMS) and the snubber ring.

a member of an ROV crew sustained fatal injuries when he was trapped between the top of the tether management system (TMS) and the snubber ring

What went wrong? What were the causes?

It should be noted that this incident remains under investigation.

Additional information will be provided in due course.

What lessons were learnt? What actions were taken?

  • Maintenance activities should be properly risk assessed and undertaken in accordance with company procedures.

  • Maintenance activities often introduce additional hazards into the workplace; these should be fully understood, assessed and managed.

  • There should be a documented safe system of work, for example, a maintenance manual and/or work instruction.

  • If activation of the equipment is necessary to complete the maintenance activity, for example for testing purposes, extreme care needs to be taken which includes removing all personnel from any danger zone.

  • Avoid undertaking a maintenance activity under a load or between a load and fixed point.

  • Equipment must be turned off and isolated when being worked on.

  • The incident highlights the need for strict compliance with the ‘golden’ or ‘life-saving’ rules used by all contractors and clients.

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.