AOPA Position AOPA encourages licensed Unicom operators to consider changing an overloaded Unicom frequency to a frequency unique to your area, thus avoiding congestion and improving safety. A minimum of 60 statute miles is desirable, although not possible in most high density locations, between airports with the same frequency. Select from the 7 frequencies mentioned above after review of frequencies used in your area. The FCC database may also be used to identify frequencies assigned by the FCC and are accessed from the FCC web site. Stations licensed to a government agency need only file form 406.
Government agencies are exempt from the fee requirements.
Both the forms and instructions are available on the FCC web site. After the FCC has approved a frequency change, the station operator must notify the FAA to issue a Notam and NOAA to update the charts and facilities directory. Associated links and related documents 47CFR Ch. 1, Par.