Plain English Meaning

Help that ATC can give you because they can see your aircraft on their radar screen. This includes telling you about other traffic, giving you headings to fly, fitting you into a flow of arrivals or departures, and keeping you safely separated from other aircraft.

Full Definition

Air traffic control services provided to a pilot through the use of radar, including traffic advisories, vectoring, sequencing, and separation from other aircraft. Radar services are provided by approach control, departure control, and air route traffic control centers (ARTCC) when the aircraft is identified on the 's .