What is the normal upper limit for Class D airspace?

The normal upper limit for Class D airspace is typically 2,500 feet above ground level (AGL). Class D airspace generally extends from the surface up to a specified upper limit, which is often set at this altitude. This allows for the safe integration of various types of air traffic, including small general aviation aircraft, while still maintaining sufficient separation from higher altitude operations.

The designation of 2,500 feet AGL is designed to ensure that aircraft operating within this airspace remain at a safe distance from those operating in surrounding airspace classes, particularly Class C and Class B airspace, which have higher upper limits. By recognizing this limit, pilots can better plan their flights and adhere to the necessary regulatory guidelines that govern operations within Class D airspace. This knowledge is crucial for ensuring compliance with airspace regulations and for maintaining safety and efficiency in the aviation system.