When a control tower, located on an airport within class D airspace, ceases operation for the day, the airspace reverts to Class E or a combination of Class E and G airspace during the hours the tower is not in operation.
What is airport control tower?
Within five miles of the airport, these towers control takeoffs, landings, ground traffic, and airborne aircraft. Their main goals are to keep planes from colliding, to manage and speed up air traffic, and to give pilots information and other support. Control towers gather and utilise operational data that is nearly real-time from the whole company ecosystem to increase visibility and facilitate decision-making.
Air Traffic Control Towers are buildings tall enough to serve as a visual reference for controllers in the terminal environment. Air Traffic Controllers (ATC) for a local airport typically live there.
Hence, When a control tower, located on an airport within class D airspace, ceases operation for the day, the airspace reverts to Class E or a combination of Class E and G airspace during the hours the tower is not in operation.
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