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Aeronautical mobile service

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Aeronautical station of the Aeronautical mobile (OR) service in Afghanistan
Aeronautical mobile (R) service in the Washington ARTCC
US Airways Flight 1549 record (ATC) during the emergency landing in the Hudson River
Britische VOLMET-record on HF

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.»

See also
Main articles: Radio station and Radiocommunication service

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)
2 850 - 3 025 kHz 3 025 - 3 155 kHz
3 400 - 3 500 kHz 3 500 - 3 950 kHz
4 650 - 4 700 kHz 4 700 - 4 850 kHz
5 450 - 5 480 kHz 5 450 - 5 480 kHz
5 480 - 5 680 kHz 5 480 - 5 730 kHz
6 525 - 6 685 kHz 6 685 - 6 765 kHz
8 815 - 8 965 kHz 8 965 - 9 040 kHz
10 005 - 10 100 kHz 11 175 - 11 275 kHz
11 275 - 11 400 kHz 13 200 - 13 260 kHz
13 260 - 13 360 kHz 15 010 - 15 100 kHz
17 900 - 17 970 kHz 17 970 - 18 030 kHz
21 924 - 22 000 kHz 23 200 - 23 350 kHz

References / 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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