How Does The Simple Flying Flight Tracker Actually Know Where A Plane Is?

Flight trackers display aircraft locations through a complex network relying on Automatic Dependent Surveillance–Broadcast (ADS-B) technology. ADS-B systems transmit an aircraft’s precise location and altitude information via radio signals to ground stations. These ground stations then relay this data to tracking services which ultimately update the displayed maps. Aircraft equipped with ADS-B Out transponders are responsible for sending these continuous position reports. The accuracy of flight tracking depends heavily on the density and coverage of these strategically placed ground receiving stations worldwide.