Aeronautical mobile (R) service
Aeronautical mobile (R) service (AM(R)S; or aeronautical mobile radiocommunication (R) service) is – according to Article 1.33 of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as "An aeronautical mobile service reserved for communications relating to safety and regularity of flight, primarily along national or international civil air routes."
This service is a so-called safety-of-life service, must be protected for interferences, and is an essential part of air traffic control.
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