Definition
The procedure by which one radar controller transfers radar identification and control responsibility for an aircraft to another radar controller, typically when the aircraft is about to cross from one controller's airspace or sector into another's. The receiving controller accepts the aircraft, after which the pilot is instructed to contact the new controller on a new frequency.
Plain English
When you're being watched and directed by one air traffic controller on radar, and you're about to move into another controller's area, the two controllers pass you between them. You'll then be told to switch to a new radio frequency and check in with the next controller.
Context Anchor
Encountered during instrument approaches when an aircraft is being guided by approach control, tower, or another air traffic control facility near the airport.
Derivation
Hand-off comes from the everyday sense of physically passing something from one person to another. In radar work, what's being passed is the responsibility for tracking and directing the aircraft.
Why Pilots Care
Keeps the aircraft under continuous radar surveillance and coordinated control, avoiding any loss of tracking or communication.
Intuition Check
A radar hand-off does not mean the pilot hands anything over, and it does not mean radar service stops. It means controllers transfer responsibility for the aircraft while keeping its radar identity clear.
Example Sentence 1
After the hand-off from Center, the pilot contacted Approach Control and was given vectors to the final approach course.
Example Sentence 2
Multiple radar hand-offs occurred between sectors to maintain continuous coverage throughout the arrival.