![]() The aviation VHF communication band ranges from 118.000 MHz to 136.995 MHz. Military aircraft can use the ultra high frequency band (UHF). On oceanic flight, with the long distance involved between ATC and pilots, the High frequency (HF) communication band is selected by using the long range communication property of this frequency.Įxample of a VHF/HF communication panel in a 737 aircraft: In the real world, the pilot uses mainly radio communication in the very high frequency band (VHF) in order to use voice communication. ![]() The frequency band definition: Frequency band The term may refer to a radio band or an interval of some other spectrum. The radio spectrum of frequencies is divided into bands with conventional names designated by the International Telecommunications Union (ITU): A frequency band is an interval in the frequency domain, delimited by a lower frequency and an upper frequency. In half-duplex communication, each party can communicate to the other, but not simultaneously the communication has one direction at a time : ATC to pilot(s), or Pilot to ATC. The radio transmitter can be tuned to the selected frequency manually by its user. In real aviation, all aircraft and all air traffic controllers are equipped with radio transmitters and antennas.Įach radio transmitter uses one unique frequency at a time and performs half duplex communication (this frequency is sometimes also called a radio channel). An air traffic controller shall communicate with pilots in command of all aircraft in his airspace.
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