Air Route Traffic Control Center (ARTCC) provides ATC service to aircraft operating on IFR flight plans within controlled airspace and principally during which phase of flight?

• A. Takeoff phase
• B. Final approach
• C. En route
• D. Landing phase

Answer: (C)

Artccs focus on the middle part of the flight: the en route phase. They provide ATC services for IFR flights as you climb out and head toward your destination, coordinating between radar sectors and centers to keep you safely separated at cruising altitudes while you follow your assigned route. The initial takeoff and climb are handled by departure control and the tower, while the approach and landing phases are managed by approach control (TRACON) and the tower near the airport. That’s why the en route phase is the best fit for where ARTCCs primarily operate.