Technology / Aviation / Controlled Airspace Class D: (formerly ATA - Airport Traffic Area and CZ - Control Zone) Generally, that airspace from the surface to 2,500' MSL above the airport elevation 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 will normally be designed to contain the procedures. Arrival extensions for instrument approach procedures may be Class D or E airspace. Unless otherwise authorized, each person must establish two-way radio communications with the ATC facility providing air traffic services prior to entering the airspace and thereafter maintain those communications while in the airspace. No separation services are provided to VFR aircraft.
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Class Verb Synonyms: classify, group, arrange, assort, type, categorize, rank, grade, rate, order
Class Noun Synonyms: rank, grade, level, order, stratum, caste, lineage, birth, pedigree, stock, extraction, descent
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