What are the normal lateral limits for Class D airspace?

The normal lateral limits for Class D airspace, as defined by the Federal Aviation Administration (FAA), typically extend for a radius of up to 4 nautical miles from the center of the primary airport. This kind of airspace is designed to manage traffic around airports that have operational control towers, and the 4 NM radius allows for effective communication and coordination between air traffic control and pilots.

Class D airspace is established to maintain safety and order in the vicinity of an airport and usually extends vertically from the surface up to a specific altitude, generally 2,500 feet above ground level. The size and configuration of Class D airspace can sometimes be tailored to the needs of the surrounding airspace or airport operations, but the standard lateral limit of 4 NM is a key characteristic.

Understanding this limit is crucial for pilots to ensure compliance with airspace regulations and to maintain safe distances from other aircraft operating in the area.