Definition
The transfer of radar identification and control of an aircraft from one air traffic controller to another, accomplished through coordination so that the receiving controller assumes responsibility for separation and communication as the aircraft crosses into a new sector or facility's airspace.
Plain English
When you fly from one controller's area into another's, the first controller passes you to the next one. They coordinate behind the scenes, then tell you to switch to the new frequency.
Context Anchor
Seen in instrument flying when a pilot must keep the airplane steady while moving a hand between the flight controls, throttle, trim, or other cockpit controls.
Why Pilots Care
A smooth hand-off keeps radar separation and communication uninterrupted; a missed hand-off can create a loss of separation or require the pilot to re-establish contact.
Analogy
It is like passing a full cup from one hand to the other without spilling it; the movement matters because the thing you are controlling needs to stay steady.
Intuition Check
Do not read hand-offs here as only an air traffic control transfer from one controller to another. In this control-sequence context, it means the pilot’s smooth transfer of hand position or pressure while maintaining control of the airplane.
Example Sentence 1
After the hand-off from Departure to Center, the pilot checked in at 8,000 feet climbing to 12,000.
Example Sentence 2
The pilot was told to contact the new frequency after the hand-off had been accepted.