Aeronautical mobile-satellite (R)° service (short: AMS(R)S;  | also: aeronautical mobile-satellite (R) radiocommunication service) is – according to Article 1.36 of the International Telecommunication Union's (ITU) Radio Regulations (RR)^[1] – defined as «An aeronautical mobile-satellite service reserved for communications relating to safety and regularity of flights, primarily along national or international civil air routes.»

See also

Main articles: Radio station and Radiocommunication service

This radiocommunication service is classified in accordance with ITU Radio Regulations (article 1) as follows:
Mobile service (article 1.24)

• Aeronautical mobile service (article 1.32)
  • Aeronautical mobile-satellite service (article 1.35)
    • Aeronautical mobile-satellite (R)° service
    • Aeronautical mobile-satellite (OR)°° service (article 1.37)

(R)° – abbreviation to route flights (route)
(OR)°° – abbreviation to flights others than on routes (off-route)

The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012).^[2]

In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.

• primary allocation: is indicated by writing in capital letters (see example below)
• secondary allocation: is indicated by small letters
• exclusive or shared utilization: is within the responsibility of administrations

Example of frequency allocation