page_title: Air-to-ground communication
hierarchical_section_title: Air-to-ground communication
caption_attribution_description: Deutsch: Am 13. Januar 1908 gewann Henri Farman mit seiner Voisin-Farman I den Grand Prix d´Aviation für den ersten geschlossenen Flug über 1 Kilometer (0,6 Meilen). English: On Jan. 13, 1908, French aviator Henri Farman won with his Voisin-Farman I the Grand Prix d’Aviation for the first circular flight of more than 1 km (0.6 mile).
context_page_description: Air-to-ground communication was first made possible by the development of two-way aerial telegraphy in 1912, soon followed by two-way radio. By World War II, radar had become the chief medium of air-to-ground and air-to-air communication. Since then, transponders have enabled pilots and controllers to identify planes automatically, greatly improving air security. Most recently, in addition to sophisticated radio and GPS systems, the unmanned aerial vehicle, or drone, has revolutionised aerial surveillance and combat.
context_section_description: Air-to-ground communication was first made possible by the development of two-way aerial telegraphy in 1912, soon followed by two-way radio. By World War II, radar had become the chief medium of air-to-ground and air-to-air communication. Since then, transponders have enabled pilots and controllers to identify planes automatically, greatly improving air security. Most recently, in addition to sophisticated radio and GPS systems, the unmanned aerial vehicle, or drone, has revolutionised aerial surveillance and combat.
caption: The earliest communication with aircraft was by visual signalling, ground-to-air only
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