Overflight permits are authorizations that allow an aircraft to fly over the airspace of a specific country. This process usually involves the submission of a flight plan and other documentation required by the civil aviation authorities of the country whose airspace will be overflown.
This includes the maintenance and repair of ground equipment such as towing tractors, stairs, and power supply systems.
Ensuring that the flight can follow the planned route without interruptions is vital for flight efficiency and safety.
To comply with international regulations and avoid penalties for unauthorized overflight, ensuring that the planned route can be followed smoothly.