What happens to Class D airspace when the control tower is not active?

What happens to Class D airspace when the control tower is not active?

• A. It becomes Class E airspace
• B. It remains Class D airspace
• C. It turns into Class G airspace
• D. It automatically closes

Answer: (A)

When the control tower is not active at an airport that is designated as Class D airspace, the airspace transitions to Class E airspace. This change occurs because Class D airspace is specifically characterized by the presence of an operational control tower. Once the control tower is closed, the airspace no longer has the same operational structure and procedural requirements associated with Class D. Class E airspace does not have a control tower, and it usually extends to the minimum altitudes needed for en route air traffic or to the floor of the Class A airspace that begins at 18,000 feet MSL. Therefore, when the control tower is not in operation, pilots must adjust to the lighter traffic and different communication requirements associated with Class E airspace. Understanding this transition is crucial for pilots, as it affects their communication, navigation, and operational procedures in the vicinity of the airport.

When the control tower is not active at an airport that is designated as Class D airspace, the airspace transitions to Class E airspace. This change occurs because Class D airspace is specifically characterized by the presence of an operational control tower. Once the control tower is closed, the airspace no longer has the same operational structure and procedural requirements associated with Class D.

Class E airspace does not have a control tower, and it usually extends to the minimum altitudes needed for en route air traffic or to the floor of the Class A airspace that begins at 18,000 feet MSL. Therefore, when the control tower is not in operation, pilots must adjust to the lighter traffic and different communication requirements associated with Class E airspace.

Understanding this transition is crucial for pilots, as it affects their communication, navigation, and operational procedures in the vicinity of the airport.