What must an air traffic controller do before issuing a clearance for an aircraft departing Class E airspace?

Before issuing a clearance for an aircraft departing Class E airspace, it is crucial for an air traffic controller to obtain the pilot's concurrence. This step is essential because the controller needs to ensure that the pilot is aware of and agrees with the instructions provided, which may include details such as the intended flight path, altitude, and any airspace restrictions. This communication helps establish a mutual understanding of the flight operation, ensuring safety and compliance with air traffic procedures.

While it may seem necessary to inform all nearby pilots or specify altitude and approach directions, these actions typically happen within the context of the overall flight operation and after obtaining the pilot's agreement to proceed. The pilot's concurrence is the foundation that supports safe and efficient air traffic management, emphasizing the importance of clear communication and shared situational awareness between the controller and pilot.