Definition
An air traffic control facility that uses radar to manage aircraft arriving at, departing from, and transiting the airspace around one or more busy airports, typically within about 30–50 nautical miles of the primary airport and up to around 10,000 feet. A TRACON sequences and separates traffic between the en route Center environment and the airport tower.
Plain English
A radar-equipped control room that handles airplanes coming into and leaving the airspace surrounding a busy airport. It takes over from the high-altitude controllers and hands aircraft off to the airport tower, and vice versa.
Context Anchor
You will encounter TRACON when discussing air traffic control services near airports, especially during instrument departures, arrivals, and radar vectors.
Derivation
Built from Terminal (the airspace around a terminal airport, as opposed to en route) + Radar Approach Control. 'Terminal' here means the end-points of a flight — the airspace near the airport — not a passenger terminal building.
Why Pilots Care
Knowing you are talking to TRACON helps you understand the controller's scope and procedures for your arrival or departure.
Intuition Check
Do not read “terminal” as the passenger building at the airport. In this term, it means the airport-area airspace where aircraft are arriving and departing.
Example Sentence 1
After leaving the Center's frequency, we checked in with the TRACON controller working SoCal Approach for vectors to the ILS.
Example Sentence 2
TRACON coordinated the handoff from center to the tower.