Definition
A service operated by a governing aviation authority to promote the safe, orderly, and expeditious flow of air traffic. Controllers working from facilities on the ground issue instructions, clearances, and information to pilots by radio to keep aircraft separated from one another and from terrain or obstacles, and to organize the sequence of arrivals, departures, and en route movements.
Plain English
Air Traffic Control is the ground-based team that talks to pilots over the radio, tells them where and when they can fly, and keeps aircraft safely apart from each other.
Context Anchor
Pilots encounter Air Traffic Control on the radio when taxiing, taking off, landing, flying near busy airports, or receiving help from controllers during flight.
Why Pilots Care
ATC provides essential traffic separation, route clearances, and safety advisories that prevent collisions and organize flight in busy or complex airspace.
Intuition Check
Air Traffic Control does not mean controllers fly the airplane for you. The pilot still flies the aircraft; controllers manage traffic by issuing clearances, instructions, and information.
Example Sentence 1
Before entering Class C airspace, the pilot established two-way radio communication with Air Traffic Control.
Example Sentence 2
Air Traffic Control issued a vector to avoid traffic and then cleared the approach.