Airband
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- This article is about the radio spectrum used in aviation. An "air band" is a musical group which plays imaginary instruments, notably the air guitar. AirBand is a company which sells wireless networking equipment.
The airband or air band is the band of frequencies used for radio communication in aviation. Airband is used to mean the VHF band between 108 MHz and 137 MHz, which covers its use for commercial and general aviation, radionavigational aids, air traffic control and other uses. Military aircraft also operate using additional frequencies (225 - 400 MHz) which are not part of the airband.
The lower part of the band, from 108 to 117.975 MHz, is reserved for navigational aids such as VOR beacons, ATIS and ASOS messages, and precision approach systems such as ILS. Some types of aviation-related stations, such as NDBs and DMEs, do not operate on these frequencies; in the case of NDBs the longwave frequency band is used. The rest of the airband is allocated to voice communications using amplitude modulation.
Channel spacing on the airband has been 25 kHz, but increasing congestion has led to further subdivision into 8.33 kHz channels in some areas. A switch to digital radios has been contemplated, as this would greatly increase capacity by reducing bandwidth. However, this has yet to happen, partly because the mobility of aircraft necessitates complete international coordination.
Amateur and hobbyist
Amateur radio • Citizens' band radio • Family Radio Service
General Mobile Radio Service • Multi-Use Radio Service • UHF CB (Australia) • PMR446
Aviation (aeronautical mobile)
Airband • UNICOM
Land-based commercial and government mobile
Business band • Base station • Mobile radio • Radio repeater • Trunked radio system • Walkie talkie
Marine (shipboard)
2182 kHz • Coast radio station • Marine VHF radio • Maritime mobile amateur radio
Signaling / Selective calling
CTCSS • MDC-1200 • Push to talk • Quik Call I • Selcall