What is the prescribed phraseology to initiate a manual handoff?

The prescribed phraseology to initiate a manual handoff in air traffic control is the term "Handoff." This term is specifically used to inform pilots and other controllers that control responsibility for the aircraft is being shifted from one controller to another. Using standardized phraseology helps to ensure clarity and understanding in communication, which is crucial for maintaining safety in an environment where multiple aircraft are being managed.

In contrast, while position relative to a fix, aircraft identification, and assigned altitude are all vital pieces of information that may be included in various communications regarding an aircraft’s status or instructions, none of these directly serve as the initiating term for a manual handoff. Each of these pieces of information may be critical in operations but are typically conveyed during the handoff process rather than as the initiation itself. Thus, the term "Handoff" is the precise language required to effectively commence this essential procedure.