scope:

This Standard specifies the technical performance characteristics, test methods and minimum requirements for radiocommunications equipment operating in the aeronautical radio service in the frequency range 118 MHz to 137 MHz using amplitude modulation and 25 kHz channel spacing.

This Standard specifies the requirements for land-based base stations, mobiles, and personal mobile equipment and equipment used in conjunction with activities such as aviation sport and as otherwise specified by the appropriate aviation regulatory authority. The Standard does not apply to fixed equipment installations in aircraft.