What is the definition of an ARTCC?

The definition of an ARTCC, or Air Route Traffic Control Center, is that it provides air traffic control services primarily to IFR (Instrument Flight Rules) flights during the en route phase of their flights. ARTCCs are essential components of the National Airspace System, responsible for managing and coordinating air traffic over designated regions of the airspace, ensuring safe and efficient flight operations.

They employ radar and other advanced technologies to track aircraft, provide essential separation between flights, and assist pilots with navigation and traffic advisories. This capability is particularly critical in the en route phase when aircraft are cruising at altitudes that are typically higher, away from the congested airspaces near airports.

The other options do not accurately reflect the primary function of an ARTCC. While some facilities are designated for VFR flights, handle emergencies, or focus on military operations, ARTCCs are specifically built to manage IFR traffic over large distances, showcasing their unique role in the air traffic control system.