Technology / Aviation / Class B Airspace: Airspace area around the busiest U.S. hub airports (i.e. Chicago O’Hare), typically to a radius of 20 nautical miles and up to 10,000 feet AGL (Above Ground Level). Operations within Class B airspace require an ATC clearance (Air Traffic Control) and at least a Private Pilot certificate (local waivers are available), radio communications, and an altitude-reporting transponder (Mode C).
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
Technology / Aviation / Controlled Airspace Class B: (formerly TCA - Terminal Control Area) Generally, that airspace from the surface to 10,000' MSL surrounding the nation's busiest airports in terms of airport operations or passenger enplanements. The MORE
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