Carbon monoxide poisoning on motor cruiser Arniston with loss of 2 lives

Location: Windermere, England.

Accident Investigation Report 2/2015

Investigation report into marine accident including what happened, safety lessons and recommendations made:

MAIB investigation report 2-2015: Arniston

Annexes to MAIB investigation report 2-2015

Photograph of motor cruiser Arniston

Summary

Report on the investigation of the two fatalities due to carbon monoxide poisoning on board the Bayliner 285 motor cruiser Arniston on Windermere on 1 April 2013.

This reports the MAIB’s investigation into two fatalities due to carbon monoxide poisoning on board the motor cruiser Arniston on Windermere on 1 April 2013. A mother and her daughter were overcome by fumes from a portable generator which had been installed in the engine bay and modified by the addition of an exhaust which subsequently failed allowing the small sleeping area to fill with lethal carbon monoxide.

The report found that:

  • The installation of the portable air-cooled petrol generator in the enclosed engine bay was against the advice provided by the manufacturer.
  • The improvised exhaust system fitted to the generator was not fit for purpose.
  • All safety critical work on boats should be undertaken by a competent marine engineer using the correct materials.
  • The boats occupants were not alerted to the presence of CO because the alarms fitted on board were not working.

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