very high frequency

(redirected from 87.9 MHz)
Also found in: Dictionary, Thesaurus, Financial, Wikipedia.

very high frequency

[¦ver·ē ¦hī ′frē·kwən·sē]
(communications)
The band of frequencies from 30 to 300 megahertz in the radio spectrum, corresponding to wavelengths of 1 to 10 meters. Abbreviated VHF.

very high frequency (VHF)

very high frequency (VHF)click for a larger image
Typical line-of-sight distances for VHF reception.
The range of radio frequencies between 30 and 300 MHz. Portions of this band, 108 to 118 MHz, are used for certain NAVAIDs (navigational aids); 118 to 136 MHz are used for civil air-to-ground voice communications. Other frequencies in this band are used for purposes not related to air traffic control. Very high frequencies are line-of-sight frequencies with practically no ground-wave element. The VHF range increases with height. The maximum ranges for voice communication are about 185 miles (300 km). Communication systems operating VHF bands provide high-quality communications between aircraft and ground stations. In spite of being line-of-sight communication, long-range communications using VHF are possible through repeater stations and satellite links.