ICAO audits countries on their level of aviation safety utilising eight parameters; Legislation, Organization, Licensing, Operations, Airworthiness, Accident Investigation, Air Navigation Service and Aerodromes.  At AirlineRatings.com, any airline that meets the global average for all eight parameters gets two stars towards the seven star total available. If 5-7 of these parameters are met they are awarded one star. If less than 5 of the parameters are met no stars are awarded. Qatar now meets the global average for 5 of the criteria whereas before it met only 4. As a result, the airline has been awarded one extra star towards its safety rating at AirlineRatings.com to give an overall score of 6 out of 7. It is a similar story for Oman Air who after a significant improvement in their aviation safety levels now meet 7 of the 8 criteria set out by ICAO. Oman previously met less than 5 of the criteria.  As a result of these changes Oman Air are now rated a 6 out of 7 for their overall safety rating on Airlineratings.com For detailed information on our safety rating criteria please click here or for the individual safety breakdown for any airline click here.