Definition
An air traffic control facility that uses radar to provide approach control services to aircraft arriving at, departing from, or transiting the airspace surrounding one or more airports. It sequences and separates traffic in the terminal area, typically within roughly 30 to 50 nautical miles of the primary airport and up to about 10,000 feet, before handing aircraft off to the tower for landing or to a center for en route flight.
Plain English
A radar-equipped ATC facility that handles aircraft in the busy area around an airport — guiding them in for arrival, out after departure, and through nearby airspace.
Context Anchor
Seen in discussions of control towers, approach control, departure control, and instrument flying near airports.
Derivation
Terminal here means the end points of a flight — the airport area where flights begin and end — not a building. Radar comes from RAdio Detection And Ranging. So a terminal radar facility is the radar-based control facility serving the airport-area airspace.
Why Pilots Care
Pilots rely on terminal radar facilities for radar vectors, traffic advisories, and sequencing during arrivals and departures.
Intuition Check
Terminal does not mean the passenger terminal building here. It means the airport-area airspace where aircraft are arriving, departing, or passing nearby.
Example Sentence 1
After takeoff, the tower handed us off to the terminal radar facility, which gave us vectors on course and a climb to 6,000 feet.
Example Sentence 2
Terminal radar facilities often provide approach control services for multiple airports in a busy metropolitan area.