Definition
Short-range radar systems located at or near busier airports, used by approach and departure controllers to track aircraft within roughly 40 to 60 nautical miles of the airport and below about 10,000 feet. Terminal radars provide the higher-resolution, close-in coverage needed to sequence arrivals, separate departures, and guide aircraft during the transition between en route airspace and the airport environment.
Plain English
Radars that watch the airspace close to a busy airport, so controllers can see and direct aircraft as they arrive, depart, or fly nearby.
Context Anchor
Seen in discussions of Air Route Traffic Control Centers and how controllers get radar information for aircraft moving between the airport area and the wider en route system.
Derivation
‘Terminal’ comes from the Latin terminus, meaning ‘end’ or ‘boundary.’ In aviation, the terminal area is the airspace at the end of a flight (or the start) — close to the airport. So a terminal radar is one that covers that airport-end airspace, as opposed to the en route airspace between airports.
Why Pilots Care
When you’re being vectored for an approach, sequenced behind traffic, or handed off as you depart, it’s a terminal radar facility (like a TRACON or tower with radar) watching you. Knowing this helps you understand why service quality, frequencies, and controller workload change as you transition between en route and terminal airspace.
Intuition Check
Terminal does not mean the passenger building here. It means the controlled airport area where aircraft are arriving, departing, and being sequenced by controllers.
Example Sentence 1
After Center handed us off, the terminal radar facility began vectoring us for the ILS.
Example Sentence 2
Terminal radars provide tighter spacing than the wider coverage used on airways.