UHF Ultra Hight Frequency 300-3000 MHz
Mostly used by Military Radio and Navigation Aids. Also used for TV sound.
SHF Special High Frequency 3000 kHz and up
Used for microwave links and satellite communication.
Radio plays one of the most important roles in aviation. It is used for communication and navigation. Radio waves are also used in Radar. Without radio, aviation as it is today, would be impossible.