Aeronautical mobile-satellite (OR)°° service (short: AMS(R)S; | also: ''aeronautical mobile-satellite (R) radiocommunication service'') is – according to ''Article 1.37'' of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «''An aeronautical mobile-satellite service reserved for communications relating to safety and regularity of flights, primarily outside national or international civil air routes''.» ;See also:

Classification

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 (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)

Frequency allocation

The allocation of radio frequencies is provided according to ''Article 5'' of the ITU Radio Regulations (edition 2012).''ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations'' 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 *secondary allocation: is indicated by small letters *exclusive or shared utilization: is within the responsibility of administrations

References / sources

International Telecommunication Union (ITU)
Mobile services ITU Airbands Air traffic control {{radio-comm-stub