Definition
One-way or two-way voice transmission from a ground-based facility to an aircraft in flight, used to deliver instructions, advisories, weather, or navigation information. In the VOR context, ground-to-air communication is provided by transmitting voice over the VOR frequency, allowing a controller or Flight Service specialist to speak to the pilot through the same receiver the pilot is using for navigation.
Plain English
Someone on the ground talking to the pilot in the air by radio. With a VOR, the station can send a voice message over the same signal the pilot is using to navigate.
Context Anchor
Seen in discussions of VOR stations that can send voice information to pilots on the station frequency.
Why Pilots Care
Pilots rely on it to receive navigation signals, clearances, and weather updates needed for safe instrument flight.
Intuition Check
Do not assume this means any radio conversation involving an airplane. Here, ground-to-air points to the direction of the message: from the ground up to the aircraft.
Example Sentence 1
The Flight Service specialist used ground-to-air communication over the VOR frequency to pass along an updated altimeter setting.
Example Sentence 2
Ground-to-air communication from the tower provided the updated altimeter setting.