A Survey and Preliminary Study of Worldwide USAF Aircraft Operations and Air Traffic Control
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First part of a report on USAF aircraft operations and civil and military air control. Problems of incapacity and congestion plague most freeworld navigable airspace. Three levels of air traffic control facilitation exist: highest — VHF/UHF navigation aids, communications, and radar surveillance or control; lowest — low-medium frequency beacons with sparse VHF/UHF navigation aids and communications; and a combination of these.