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The Marine Accident Investigation Branch (MAIB) examines and investigates all types of marine accidents to or on board UK ships worldwide, and other ships in UK territorial waters.

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Arniston Accident Investigation Report

Published 27 January 2015

The safety issues identified are:

  • 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.

Read accident investigation report

Wacker Quacker 1 and Cleopatra Combined Accident Investigation Report

Published 17 December 2014

The safety issues identified are:

  • Wacker Quacker 1 sank because it did not contain sufficient buoyant material to remain afloat in the flooded condition.
  • The converted World War 2 amphibious passenger vehicles in Liverpool and London had been allowed to operate for over a decade without having met the UK’s mandated buoyancy standard.
  • When the London based operators inserted the required volume of buoyancy foam, it introduced the circumstances that led to the fire on board Cleopatra.
  • The confined nature of the amphibious vehicles made it extremely difficult for the crews to control and assist the passengers.
  • It was extremely fortunate that lives were not lost, as in both cases the passengers and crew had to act on instinct and evacuate into the water under their own initiative, many without personal floatation devices.

Read Combined Accident Investigation Report

Current investigations
This section contains a list of the investigations currently underway in the branch:

Current investigations

Publications and information
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For detailed MAIB reports including downloadable and printable documents go to:

MAIB Publications

MAIB Safety Digests

Investigation Reports by Year

Investigation Reports by Vessel Category

Investigation Reports by Incident

Reports Listed Alphabetically

MAIB Safety Flyers

MAIB Annual Reports

Any requests for information received by MAIB are answered in accordance with the Freedom of Information Act 2000 or the Environmental Information Regulations 2004.

Freedom of Information Act

How to report an accident
Accidents (including serious injuries) must by law be reported to the MAIB by the quickest possible means. This is so they can be investigated immediately before vital evidence decays, is removed or lost.

For further information go to the:

Report an accident section