Aeronautical mobile service

Aeronautical mobile service (short: AMS; also: aeronautical mobile radiocommunication service') is – according to Article 1.32 of the International Telecommunication Union's (ITU) Radio Regulations (RR)[1] – defined as "A mobile service between aeronautical stations and aircraft stations, or between aircraft stations, in which survival craft stations may participate; emergency position-indicating radiobeacon stations may also participate in this service on designated distress and emergency frequencies."

Aeronautical station of the Aeronautical mobile (OR) service in Afghanistan
Aeronautical mobile (R) service in the Washington ARTCC

Classification

Variations of this radiocommunication service in line to the ITU Radio Regulations article 1 are as follows :
Mobile service (article 1.24)

(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).[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

However, military usage, in bands where there is civil usage, will be in accordance with the ITU Radio Regulations. In NATO countries military utilizations will be in accordance with the NATO Joint Civil/Military Frequency Agreement (NJFA).

Example of frequency allocation
Allocation to services
     Region 1           Region 2           Region 3     
2 850–3 155 MHz
AERONAUTICAL MOBILE (R)
3 025–3 025
AERONAUTICAL MOBILE (OR)


Frequency range (shortwave)
On-Route (R)       Off-Route (OR)
2850–3025 kHz 3025–3155 kHz
3400–3500 kHz 3500–3950 kHz
4650–4700 kHz 4700–4850 kHz
5450–5480 kHz 5450–5480 kHz
5480–5680 kHz 5480–5730 kHz
6525–6685 kHz 6685–6765 kHz
8815–8965 kHz 8965–9040 kHz
10005–10100 kHz 11175–11275 kHz
11275–11400 kHz 13200–13260 kHz
13260–13360 kHz 15010–15100 kHz
17900–17970 kHz 17970–18030 kHz
21924–22000 kHz 23200–23350 kHz

See also

Sources
  1. ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.32, definition: aeronautical mobile service / aeronautical mobile radiocommunication service
  2. ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations
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