What is the primary condition for transferring control of an airplane in air traffic management?

The primary condition for transferring control of an airplane in air traffic management is that any potential conflict with other aircraft has been eliminated. This ensures the safety and efficiency of air traffic operations. Before control can be handed over from one controller to another or from one phase of flight to another, it is essential to assess and resolve any potential conflicts that may arise due to the flight paths, altitudes, or speeds of nearby aircraft.

By confirming that conflicts have been addressed, air traffic controllers can maintain safe separation and prevent misunderstandings or accidents during the transfer of control. In the context of air traffic management, ensuring that no conflicts exist is fundamental to maintaining safety in the increasingly complex airspace system.

While other options touch on important aspects of communication and operational protocols, they do not prioritize the critical factor of ensuring that conflicts are resolved before control is transferred, which is central to effective and safe air traffic control operations.