Have you ever wondered how pilots know where they are going? Airplanes travel thousands of miles across the sky, and although the horizon looks the same everywhere, they still manage to reach their destination with precision. Piloting an airplane to its destination is more like sea navigation than driving a vehicle such as a car: …

Transponder for aircraft identification In aeronautics, planes have transponders to help with their identification by radars and also as a system of collision avoidance The first transponder systems were developed in aeronautics by the British army and by the American army during the Second World War under the name of Identification friend or foe (IFF) …