Seawater entering cabin caused electrical fault

  • Safety Flash
  • Published on 12 August 2019
  • Generated on 20 May 2026
  • IMCA SF 19/19
  • 1 minute read

During vessel operations, a porthole in a passenger’s cabin was left untightened and slightly ajar.

What happened?

This allowed for seawater to enter the cabin and seep into the electrical socket under the porthole causing a short circuit resulting in burnt wiring and smoke in the cabin.

A passenger observed the smoke and raised the alarm; the response team attended the scene and immediately isolated the supply.

The Master subsequently held a time out for safety – involving all passengers and crew – to highlight the safety failings, potential outcomes and improvements required regarding this near miss.

a cabin porthole was left slightly ajar, allowing seawater to enter the cabin and seep into the electrical socket under the porthole causing a short circuit resulting in burnt wiring and smoke in the cabin
seawater to enter the cabin and seep into the electrical socket under the porthole causing a short circuit resulting in burnt wiring and smoke in the cabin

What went wrong?

Cabin occupants failed to ensure that portholes were closed during vessel transit.

What actions were taken?

  • Ensure all are given full and appropriate vessel induction when boarding, and that all are aware of the need to maintain watertight integrity at all times.

  • Ensure full and effective watertight integrity inspections are made and confirmed when leaving port.

Latest Safety Flashes:

Worker suffered crush injury while handling unstable steel plates

Steel plates suddenly toppled over to the side trapping a worker's left hand and wrist between a frame and an emergency stop pedestal.

Read more
High Potential Near Miss: Dropped object due to contact with crane sheave

A Dynamic Positioning (DP) beacon came into contact with sheave protection bars, resulting in the beacon and its holder assembly detaching and falling to the deck below.

Read more
Machinery damaged through improper maintenance technique

During an audit on an offshore vessel it was observed that the fuel oil purifier failed to self-discharge.

Read more
Shifting cargo and deck spill during heavy weather

A sodium chloride brine storage tank shifted approximately 0.5m during heavy weather conditions.

Read more
MSF: Fast Rescue craft (FRC) washed overboard and lost at sea

The Marine Safety Forum (MSF) has published Safety Alert 26-03 relating to the loss of a Fast Rescue Craft (FRC).

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.