Definition
Services provided by an air traffic controller using radar to help a pilot navigate, maintain separation from other aircraft and terrain, or recover from a difficult situation. This can include radar vectors (heading instructions), traffic advisories, position information, and guidance back on course or to an airport.
Plain English
Help from a controller who is watching your aircraft on a radar screen and giving you instructions or information to keep you safe and on track.
Context Anchor
You will encounter this term when studying how air traffic control can help an aircraft that is lost, in weather, near traffic, or needing guidance while flying on instruments.
Derivation
From radar (originally an acronym for Radio Detection And Ranging) plus assistance (help). The phrase simply names the service: help provided by means of radar.
Why Pilots Care
Allows continued flight in low visibility by supplying separation and course guidance without relying on visual references.
Intuition Check
Do not read “assistance” as “ATC takes over.” Radar assistance means the controller helps using radar information; the pilot still flies the aircraft and remains responsible for safe operation.
Example Sentence 1
Unsure of his position in deteriorating visibility, the pilot contacted approach control and requested radar assistance to the nearest airport.
Example Sentence 2
Radar assistance kept the flight on course when the pilot could not see the ground.