MSF: Watertight door fatality

  • Safety Flash
  • Published on 4 September 2025
  • Generated on 19 January 2026
  • IMCA SF 16/25
  • 2 minute read

The Marine Safety Forum (MSF) has published Safety Alert 25-09 relating to a watertight door fatality.

What happened?

An individual at a marine worksite was found in between the sliding hydraulic watertight door and the door frame. He was found unconscious and not breathing. He was brought to sick bay and assessed with no signs of life. Although actual causes have yet to be determined since the investigation is still ongoing, the purpose of sharing this alert is to facilitate reflective discussions with vessel marine crews and interested parties on the dangers posed by watertight doors.

Watertight Door safety awareness

  • What are watertight doors for?
    • Watertight doors are there to prevent water passage between compartments, maintain buoyancy and stability; and enhance safety by limited water movement during emergencies. 
  • Where are they found?
    • Watertight doors are typically located in underdeck areas prone to water ingress and commonly found on various types of ships and vessels, including container ships, offshore vessels, etc. 

  • Types of watertight door
    • Two main types of doors: hinged and sliding doors.
    • Powered watertight doors can be operated locally, remotely from the bridge or have a form of automatic closure mechanism.
    • Powered watertight doors are extremely heavy and powerful. 

Lessons to learn

  • How aware are you of the operation of power-operated doors/equipment at your work locations, and their associated risks?
  • What control measures and safeguards are in place at your worksite to prevent this type of incident?
  • Are they sufficient?

Members may wish to refer to:

·       UK MCA (Maritime & Coastguard Agency):

Latest Safety Flashes:

High potential dropped object - cradle falls from trailer

A large “cradle insert” weighing many tonnes fell off a trailer during a lifting operation.

Read more
LTI – back injury

A member of the crew of a crew transfer vessel (CTV) badly pulled their back whilst helping with mooring operations.

Read more
NTSB: Engine room fire – put things back properly after maintenance

The National Transportation Safety Board of the United States (NTSB) has published report MIR 25-29.

Read more
BSEE: arc flash incident – is the wire still live?

The United States Bureau of Safety and Environmental Protection (BSEE) has published Safety Alert 506 relating to an arc flash incident.

Read more
Spontaneous explosion of a plastic ruler

There was a spontaneous brittle failure of a 30cm clear plastic ruler stored in an office drawer on a DSV.

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.