When should you assume control of an aircraft?

Assuming control of an aircraft is primarily based on the area of jurisdiction. When an aircraft enters your area of responsibility, it indicates that you are responsible for the safe and effective management of that flight within the specified airspace. This transition allows you to coordinate with the pilot, provide instructions, and ensure the aircraft is safely navigated through your control zone.

Establishing control upon entering your area also means that you have the necessary situational awareness and information about that airspace, which is crucial for making informed decisions. It aligns with air traffic control protocols, which emphasize effective communication and situational awareness among controllers to ensure safety and efficiency in the airspace system.