We know that when someone is speaking on the radio with ATC, he tells his call sign. But is there any other system that verifies the identity of the person speaking besides
VHF Airband FlightStick - AirNav RadarBox - Global Flight Tracking Intelligence | Live Flight Tracker and Airport Status
![Frankfurt Main, Germany. 26th Oct, 2018. Loading master Marko Klaus (below) has pushed an Airbus to its position at the edge of the runway at Frankfurt Airport with the help of his Frankfurt Main, Germany. 26th Oct, 2018. Loading master Marko Klaus (below) has pushed an Airbus to its position at the edge of the runway at Frankfurt Airport with the help of his](https://l450v.alamy.com/450v/py5yyb/frankfurt-main-germany-26th-oct-2018-loading-master-marko-klaus-u-has-pushed-an-airbus-to-its-position-at-the-edge-of-the-runway-at-frankfurt-airport-with-the-help-of-his-radio-remote-control-and-the-novel-aircraft-tow-tractor-u-the-purely-electrically-powered-vehicle-manufactured-by-mototok-is-currently-being-tested-jointly-by-airport-operator-fraport-and-lufthansa-it-should-be-more-environmentally-friendly-less-maintenance-intensive-and-more-space-saving-than-a-conventional-diesel-tractor-credit-frank-rumpenhorstdpaalamy-live-news-py5yyb.jpg)
Frankfurt Main, Germany. 26th Oct, 2018. Loading master Marko Klaus (below) has pushed an Airbus to its position at the edge of the runway at Frankfurt Airport with the help of his
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