EN ROUTE AUTOMATION SYSTEM (EAS)

The complex integrated environment consisting of situation display systems, surveillance systems and flight data processing, remote devices, decision support tools, and the related communications equipment that form the heart of the automated IFR air traffic control system. It interfaces with automated terminal systems and is used in the control of en route IFR aircraft.

Listed in the Pilot/Controller Glossary as a cross-reference to EN ROUTE AUTOMATION SYSTEM (EAS), whose text is shown above.

Source FAA Pilot/Controller Glossary↗ · checked 2026-08-25