What indicates a successful transfer of control between air traffic controllers?

A successful transfer of control between air traffic controllers is indicated by a successful handoff. This involves the coordinated exchange of responsibility for an aircraft from one controller to another, ensuring continuous and safe operation. During this process, the current controller provides the necessary information regarding the aircraft's position, intentions, and any pertinent updates to the next controller. A proper handoff not only confirms that the new controller has assumed responsibility for the aircraft but also verifies that the pilot has received the appropriate instructions.

While clarity of communication, confirmation of receipt, and radio silence are related aspects of air traffic control, they do not singularly encapsulate the complete process of transferring control. Clarity of communication is vital throughout the task, but without the actual handoff, the transfer is not completed. Similarly, a confirmation of receipt is part of the communication process but does not inherently ensure that control has been successfully transferred. Radio silence is generally not a positive indicator in this context, as it may suggest a breakdown in communication rather than a successful transition. Thus, the successful handoff stands out as the clear indicator of a successful transfer of control between controllers.