Definition
TRACONs are FAA air traffic control facilities that use radar to manage aircraft arriving at, departing from, and transiting through the airspace surrounding one or more busy airports, typically out to about 30–50 nautical miles and up to around 10,000 feet. They sit between the tower (which handles aircraft on or close to the runway) and the en route center (which handles aircraft cruising at higher altitudes over longer distances).
Plain English
TRACONs are the radar control rooms that handle aircraft in the busy airspace around major airports — after they leave the tower's area but before they reach the high-altitude cruise controllers.
Context Anchor
Seen in instrument procedures, NextGen discussions, and air traffic control descriptions for busy airport areas.
Derivation
Terminal refers to the airspace at the ends of a flight (around the airport), as opposed to en route (the cruise portion). Radar Approach Control describes the function: using radar to sequence and separate aircraft as they approach or leave the terminal area.
Why Pilots Care
Pilots receive vectors, altitude assignments, and sequencing instructions from TRACON controllers during arrivals and departures at major airports.
Intuition Check
Do not read “terminal” as the airport building. In TRACON, it means the airport-area airspace where arrivals and departures are being controlled.
Example Sentence 1
After takeoff, the tower handed us off to the TRACON, where Departure gave us a vector and a climb to 8,000 feet.
Example Sentence 2
During busy periods, multiple TRACONs coordinate to maintain safe spacing between arriving aircraft.