Definition
Terminal Automation Systems are the computer-based systems used by air traffic controllers in terminal radar facilities (such as TRACONs and approach control facilities) to track, display, and manage aircraft within terminal airspace. They process radar and surveillance data, present aircraft targets and flight data on controller displays, and provide automated tools for sequencing, spacing, conflict alerting, and handoffs between controllers.
Plain English
The computer systems that controllers near busy airports use to see aircraft on their screens and help manage traffic safely as planes arrive and depart.
Context Anchor
You may see TAS in AIM glossary or ATC equipment discussions involving approach control facilities, control towers, or traffic near busy airports.
Derivation
Terminal comes from a word meaning boundary or end point. In aviation, the terminal area is the area around an airport where flights are arriving, departing, or being handled close to the airport. Automation means machine assistance, so Terminal Automation Systems are the automated tools used for that airport-area traffic work.
Why Pilots Care
These systems give controllers faster, clearer information, which reduces delays and helps maintain safe spacing in high-traffic terminal airspace.
Intuition Check
Do not read “terminal” here as the passenger building at an airport. In this term, “terminal” means the airspace and control environment around an airport.
Example Sentence 1
The approach controller relied on the Terminal Automation System to sequence arriving traffic into the final approach course.
Example Sentence 2
TAS upgrades at the TRACON improved the accuracy of handoffs between approach control and the tower.