Which terms can be used to issue departure clearances when required?

The correct choice is founded on the standard terminology used in air traffic control for issuing departure clearances. The use of the terms "Depart," "Fly," or "Departure" aligns with the established communication protocols that ensure clarity and precision in the instructions given to pilots.

"Depart" conveys a clear instruction for the aircraft to leave the ground and initiate its flight path. "Fly" can refer to the act of taking off or following a specific course, thereby maintaining an understanding that the aircraft is cleared for its intended flight. The term "Departure" is commonly used to refer to the overall context of leaving the airport, facilitating effective communication between controllers and pilots.

This choice emphasizes vocabulary that is concise and universally understood within aviation operations, particularly during departure phases. The other options present terms that may not be standardized or widely recognized as formal instructions in an air traffic control context.