Aeronautical mobile service

Aeronautical station of the Aeronautical mobile (R) service near Hannover, Germany
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 a form of aviation communication conducted through radio. The ITU Radio Regulations divide AMS into communication used for civil air route flights (R) and off-route flights (OR). Aeronautical mobile (R) service is a so-called safety-of-life service, must be protected for interferences, and is an essential part of air traffic control. Communication occurs between radio stations onboard aircraft, termed aircraft stations, and terrestrial stations that are sometimes termed "aeronautical stations". Communication can also occur between aircraft.[1] AMS is commonly used in air traffic control.

Aeronautical mobile satellite service

Principle of aeronautical mobile satellite service

Aeronautical mobile satellite service (AMSS) is a form of AMS where an aircraft station is connected to a communications satellite. It is useful in situations where the aircraft is far away from any radio station on land.[2]

Frequency allocation

The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012).[3]

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. ^ Rigley, Jack R. (October 1992). "Aeronautical mobile satellite services: The launching of a new era in mobile communications". Canadian Journal of Electrical and Computer Engineering. 17 (4): 156–159. doi:10.1109/CJECE.1992.6592501. ISSN 0840-8688.
  3. ^ ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations
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