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90-50D - Requirements for 760-Channel VHF Radio for Aeronautical Operations

Date Issued
April 09, 1992
Responsible Office
Encourages aircraft owners to upgrade their air-ground radio communication systems. Describes and upgrades civil air traffic control frequencies in the very high frequency (118.000 to 136.975 MHz) band. The 136.000 to 136.975 MHz band became available for aeronautical use on January 1, 1990.