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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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Norman Arrow

MAIB Investigation report - Norman Arrow

Published 19 May 2011

Key issues:

  • The HSC was involved in two accidents which resulted from the vessel's inability to manoeuvre in a confined area in strong wind conditions without tug assistance;
  • The assessment of the vessel's operating limitations did not indicate the potential difficulty of manoeuvring such light-displacement, high-sided craft at slow speed in strong winds, or identified when tugs must be used;
  • The ability of the vessel to manoeuvre safely in confined areas was hampered by the poor near-field visibility from the bridge, inadequate communications and poor bridge ergonomics;
  • The CCTV system provided did not adequately mitigate the limited visibility from the bridge, which prevented the bridge team from seeing objects in close proximity to the vessel.

Read investigation report

MAIB Safety Bulletin 2/2011

Issued 12 May 2011

A second Safety Bulletin is issued following the death of a seafarer in Royal Portbury Docks, Bristol when a rescue boat fell almost 29m when its fall wire parted. The Bulletin highlights a Product Awareness Notice issued by Umoe Schat-Harding Equipment A.S. regarding the testing and periodic replacement of an inductive proximity switch that did not operate.

Read safety bulletin

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:

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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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