Sec.  87.323   Frequencies.

   (a) 121.500 MHz: Emergency and distress only.

   (b) The frequencies 121.950, 123.300 and 123.500 MHz are available for
   assignment to aviation support stations used for pilot training,
   coordination of lighter-than-air aircraft operations, or coordination of
   soaring or free ballooning activities. Applicants for 121.950 MHz must
   coordinate their proposal with the appropriate FAA Regional Spectrum
   Management Office. The application must specify the FAA Region notified and
   the date notified. Applicants for aviation support land stations may request
   frequency(ies) based upon their eligibility although the Commission reserves
   the right to specify the frequency of assignment. Aviation support mobile
   stations will be assigned 123.300 and 123.500 MHz. However, aviation support
   mobile stations must operate only on a noninterference basis to
   communications between aircraft and aviation support land stations.

   (c) The frequency 122.775 MHz and, secondary to aeronautical multicom
   stations, the frequency 122.850 MHz are available for assignment to aviation
   support stations. These frequencies may be used for communications between
   aviation service organizations and aircraft in the airport area. These
   frequencies must not be used for air traffic control purposes or to transmit
   information pertaining to runway, wind or weather conditions.

   (d) The frequency 3281.0 kHz is available for assignment to aviation support
   stations used for coordination of lighter-than-air aircraft operations.

   [ 53 FR 28940 , Aug. 1, 1988, as amended at  63 FR 68958 , Dec. 14, 1998]

Subpart L—Aeronautical Utility Mobile Stations