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91-77 - General Aviation, Coded Departure Routes (CDR)

Date Issued
June 01, 2007
Responsible Office
AJR-1,  Air Traffic
Provides guidance to customers of the National Airspace System on the use of Coded Departure Routes. CDRs provide more flexibility for selecting an alternate departure for specific airport when traffic constraint such as thunderstorms, turbulence, and periods of excessive demand exist. Use of a CDR reduces key-entry inputs for controllers and minimizes read-back time between tower staff and pilots, which creates an abbreviated clearance. These abbreviated clearances provide an efficient means for air traffic control (ATC) to provide alternate routes if an airspace constraint occurs.