Which term refers to the management of aircraft operating under specific agreements regarding control?

The term that refers to the management of aircraft operating under specific agreements regarding control is "preventive control." This term emphasizes the proactive measures taken to ensure that aircraft operations remain safe and efficient within the bounds of established protocols and agreements. In an air traffic control context, preventive control involves guiding aircraft to prevent conflicts, ensuring safe separation, and maintaining overall airspace efficiency.

Using preventive control allows air traffic controllers to implement strategies that preemptively address potential issues, thus enhancing safety and operational efficiency. The focus on the word "control" signifies the authority and responsibility of air traffic management in overseeing aircraft movements based on predefined agreements, particularly in busy or complex airspace environments.

Other options, while related to the theme of management and safety, do not correctly convey the specific context of operational air traffic management. Instead, they might suggest different aspects or approaches that are not directly tied to the management of aircraft under specified agreements.