Plain English Meaning

It means the aircraft has a radio that can talk to controllers using the higher-frequency band that the military uses for voice calls.

Full Definition

A voice radio communication capability operating in the Ultra High Frequency band (300 MHz to 3 GHz). On an ICAO flight plan, it is indicated by the equipment code letter that tells ATC the aircraft can transmit and receive voice on UHF frequencies, which are used primarily by military aircraft and some specialized civil operations.

Context Anchor

Seen in flight plan equipment codes, where the pilot lists what communication and navigation equipment the aircraft can use.

Derivation

Ultra High Frequency refers to the radio band above 300 MHz, named simply for being a higher slice of the radio spectrum than . combines 'radio' with the Greek 'tele' () and 'phone' (sound, voice) — literally 'voice radio at a distance.' Together the term means 'voice communication on UHF frequencies.'