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Welcome to the website of the MAIB

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.

MAIB Noticeboard
Ben-My-Chree report

MAIB Investigation Report & Flyer

Ben-My-Chree - published 21 December 2010

Key issues:

  • While embarking passengers and loading vehicles, ferry surged ahead due to unintentional engine movement.
  • Five out of six lines including the forward spring were held on autotension winches and offered little resistance to the vessel’s movement.
  • Passenger access structure had not been inspected or maintained. It could not accommodate any vessel movement and a 20 meter long passenger walkway section collapsed; fortunately there were no injuries.

Read full report & flyer


MAIB Safety Bulletin 4/2010

Catastrophic failure of a capacitor and explosion in an 11kV harmonic filter on board the passenger cruise vessel RMS Queen Mary 2. Issued 3 December 2010.

Read safety bulletin


Safety Bulletins are produced when urgent safety issues emerge during the course of an investigation and the Chief Inspector decides to disseminate this important information in advance of the main investigation report being produced.


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

Current investigations

Publications and information
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 Accident 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
By law accidents, including major injuries, must 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 is lost.

For further information go to the:


Report an accident section

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