Flight Regularity Messages and Flight Safety Messages

Flight Regularity Messages

They include the messages that require immediate action on the part of flight crews, aircraft operators, or agencies acting for aircraft operators for the efficient and expeditious utilization of aircraft to avoid serious delays or travel interruptions to passengers and/or cargo, or to avoid situations that could cause the aircraft operator to suffer significant economic penalties.

Flight Safety Messages

They include the messages concerning air traffic control and meteorological data for international flights and are usually handled on ICAO Major World Air Route Area (MWARA) high frequency and VHF Enroute Radio Telephone Networks or VHF ATS facilities.