A dangerous occurrence is something that happens which does not result in a reportable injury, but which clearly could have done. The main type of dangerous occurrence in the offshore industry is the release of hydrocarbons which can often, but not always, be prevented by an increased focus on asset integrity.
The Health & Safety Executive (HSE) publishes dangerous occurrences under the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations (RIDDOR) 1996.
RIDDOR does not apply to events that are reportable under the Air Navigation (Investigation of Air Accidents involving Civil and Military Aircraft or Installations) Regulations 1986; The Civil Aviation (Investigation of Air Accidents) Regulations 1989; The Merchant Shipping Act 1988, and Orders and Regulations made or to be made there under. Therefore, dangerous occurrences which are covered by any of the above regulations are not included in the RIDDOR-derived statistics.