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)^[1] – 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 article relies excessively on references to primary sources. (April 2023)

This service is a so-called safety-of-life service, must be protected for interferences, and is an essential part of air traffic control.

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

• Aeronautical mobile service (article 1.32)
  • Aeronautical mobile (R)° service (article 1.33)
  • Aeronautical mobile (OR)°° (article 1.34)
  • Aeronautical mobile-satellite service (article 1.35)
    • Aeronautical mobile-satellite (R)° service (article 1.36)
    • 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 within 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

• Radio station
• VHF Data Link