What type of airspace does KPAE become after the tower closes?

When the air traffic control tower at an airport like KPAE (Paine Field) closes, the classification of the airspace changes based on the rules governing different types of airspaces and their operational requirements.

In this scenario, KPAE transitions to Class E airspace once the control tower is no longer in operation. Class E airspace is defined as controlled airspace that is not classified as Class A, B, or C. It typically exists at higher altitudes and can also cover certain surface areas around airports, particularly when the tower is closed. This classification allows for certain types of operations, including VFR (Visual Flight Rules), while also providing ATC services where needed.

Class E airspace usually does not have the same level of restrictions as Class A, B, or C airspace, allowing for the freedom of operations that pilots may require, especially for general aviation and private pilot activities. Understanding this transition is vital for pilots to ensure compliance with airspace regulations and to maintain safety during their operations.

The other types of airspace mentioned—Class A, Class B, and Class G—serve different functions and have different requirements, which is why they do not apply to this scenario. Class A airspace is typically above