Definition
The radar flight-following service provided by ATC to observe the progress of an aircraft along its assigned route, with the controller issuing advisories to the pilot when the aircraft is observed to deviate from that route or to be heading toward terrain or obstructions. The pilot remains responsible for navigation; the controller watches and warns.
Plain English
ATC keeps an eye on you on radar as you fly your route and speaks up if you start to drift off course or appear to be heading toward terrain or an obstacle. You're still the one navigating — they're just watching out for you.
Context Anchor
Seen in air traffic control and instrument flight discussions when a controller is watching an aircraft’s progress on radar while the aircraft follows its own assigned route or path.
Derivation
Radar comes from “radio detection and ranging,” meaning using radio waves to find where something is and how far away it is. Monitoring comes from an older word meaning “to watch or warn.” Together, the term points to radar being used as a watching tool, not necessarily as the aircraft’s source of guidance.
Why Pilots Care
It enables controllers to detect deviations early and issue corrective instructions, adding a safety layer especially when weather or traffic density increases workload.
Intuition Check
Do not assume Radar Monitoring means the controller is navigating the aircraft for you. It means the controller is watching your aircraft on radar while you continue to fly the assigned path.
Example Sentence 1
While flying the published route, the pilot received radar monitoring from the center controller, who advised when the aircraft began drifting south of the assigned track.
Example Sentence 2
We requested radar monitoring while flying VFR through Class C airspace to receive traffic advisories.