What does the term 'handoff' refer to in air traffic control?

The term 'handoff' in air traffic control specifically refers to the transfer of control of an aircraft from one air traffic controller to another. This process is crucial in maintaining a safe and efficient flow of air traffic, especially as aircraft move from one airspace sector to another. When a controller sees that an aircraft is approaching the boundary of their airspace, they will coordinate with the controller in the next sector to ensure a seamless transition. This involves the original controller providing pertinent information about the aircraft, such as its current altitude, heading, and any other critical data, to ensure that the new controller can take over with full situational awareness.

In this context, the other choices do not align with the specific definition of 'handoff'. While logging flight data and safety procedures are essential components of an air traffic controller's responsibilities, they do not pertain to the process of transferring control between controllers. Similarly, communicating a flight's departure time relates more to coordination and scheduling rather than the specific action of handing off control of an aircraft. Therefore, the option that accurately captures the essence of what a 'handoff' entails in air traffic control is the transfer of control from one controller to another.