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Class D Airspace. Class D airspace is generally from the surface to 4,000 ft. above the airport elevation (charted in MSL) surrounding those airports that have an operational control tower. The configuration of each Class D airspace area is individually tailored and when instrument procedures are published, the airspace is normally designed to contain the procedures.
AIRSPACE EXPLAINED. Airspace is an area of aeronautical knowledge that is commonly poorly demonstrated on airman. practical tests. Even when airman applicants demonstrate knowledge of the airspace system that. meets the minimum standard necessary for issuance on an airman certificate or rating, it is. usually clear that this knowledge level has been achieved as a result of rote learning (learning.