§  87.185   Scope of service.

   (a) Aircraft stations must limit their communications to the
   necessities of safe, efficient, and economic operation of aircraft and
   the protection of life and property in the air, except as otherwise
   specifically provided in this part. Contact with an aeronautical land
   station must only be attempted when the aircraft is within the serivce
   area of the land station. however, aircraft stations may transmit
   advisory information on air traffic control, unicom or aeronautical
   multicom frequencies for the benefit and use of other stations
   monitoring these frequencies in accordance with FAA recommended traffic
   advisory practices.

   (b) Aircraft public correspondence service must be made available to
   all persons without discrimination and on reasonable demand, and must
   communicate without discrimination with any public coast station or
   mobile-satellite earth station authorized to provide aircraft public
   correspondence service.

   (c) Aircraft public correspondence service on maritime mobile
   frequencies may only be carried by aircraft stations licensed to use
   maritime mobile frequencies and must follow the rules for public
   correspondence in part 80.

   (d) Aircraft public correspondence service on Aeronautical
   Mobile-Satellite (R) Service frequencies may only be carried on
   aircraft earth stations licensed to use Aeronautical Mobile-Satellite
   (R) frequencies and are subject to the rules for public correspondence
   in this part. Aircraft public correspondence service on Maritime
   Mobile-Satellite Service frequencies may only be carried by aircraft
   earth stations licensed to use Maritime Mobile-Satellite frequencies
   and are subject to the rules for public correspondence in part 80.

   [ 53 FR 28940 , Aug. 1, 1988, as amended at  57 FR 45750 , Oct. 5, 1992]