The ICAO-GADSS initiative consists of three key elements: the aircraft equipment, such as the tracking device, flight data recorder (FDR) or cockpit voice recorder (CVR); the communications link between the aircraft and other flight control authorities, and the airline operations center. Furthermore, the GADSS concept focuses on components of flight tracking: normal aircraft tracking, which involves reporting the aircraft’s latitude, longitude, altitude and exact time of position at a minimum every 15 minutes; autonomous abnormal aircraft tracking, which is triggered by a specifically defined event/anomaly; and autonomous distress aircraft tracking, which increases positional reporting due to a defined state of distress.