What is a TRACON?
A TRACON (Terminal Radar Approach Control) is the ATC facility responsible for aircraft in the airspace immediately surrounding one or more airports. Think of it as the middle layer between tower controllers (who handle the runway) and center controllers (who handle high-altitude cruising traffic).
TRACONs typically control a radius of 30-50 nautical miles around their airport group, from the surface up to around 10,000-15,000 feet.
What TRACON controllers do
TRACON controllers manage the messiest part of a flight. Aircraft are descending, slowing down, turning, merging into sequences, or climbing out after departure. Everyone's changing altitude and speed at the same time.
The core job breaks down into a few pieces:
- Sequence arrivals onto final approach, spacing them 3 nautical miles apart
- Vector aircraft to intercept the ILS localizer at the right angle and altitude
- Climb departures up and hand them off to the center controller above
- Keep everyone separated while they're all converging on the same runways
It's the highest-workload position in ATC. A busy TRACON like New York handles over a million operations per year.
Major US TRACONs
Not all TRACONs are created equal. The big ones serve multiple airports and handle staggering traffic volumes.
New York TRACON (N90) covers JFK, LaGuardia, Newark, Teterboro, Westchester, and Long Island MacArthur. Six airports sharing overlapping airspace. It's routinely ranked as the busiest, most complex approach control in the country.
Southern California TRACON (SCT) handles LAX, Burbank, Long Beach, John Wayne, Ontario, and more. Seven airports packed into the LA basin.
Atlanta TRACON (A80) manages the world's busiest airport by movements, Hartsfield-Jackson Atlanta, plus surrounding fields.
TRACON vs tower vs center
These three facility types form a chain:
- Tower controls aircraft on the ground and on the runway
- TRACON controls the terminal airspace around the airport (roughly 5-50nm, surface to ~15,000ft)
- Center (ARTCC) controls the high-altitude en-route airspace above and between TRACONs
An arriving flight gets handed from center to TRACON to tower. A departure goes tower to TRACON to center. The handoffs happen continuously.
How separation works in a TRACON
TRACON controllers use 3 nautical mile lateral separation (tighter than the 5nm standard used by centers). That's because they have better radar resolution at close range, and they need the tighter spacing to fit more aircraft onto final approach.
Vertical separation stays the same everywhere: 1,000 feet.
The tighter lateral standard means less margin for error. You have to be precise with your vectors and timing.
In radarcontrol.io
radarcontrol.io includes 12 US TRACON airspaces with real waypoints, entry/exit points, and procedure data. You control arrival sequencing, ILS vectoring, and departure climbs with text commands or JavaScript automation.
Try these TRACONs:
- New York TRACON (N90) - 6 airports, 30 entry/exit points. The ultimate challenge.
- Southern California TRACON (SCT) - 7 airports across the LA basin.
- Atlanta TRACON (A80) - Funnel traffic into the world's busiest airport.
Related: What is an ARTCC? | How does ATC separation work? | What is a handoff?
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