Sec.  87.471   Scope of service.

   Stations   in  the  aeronautical  radiodetermination  service  provide
   radionavigation and radiolocation services.

   (a)  Transmission  by radionavigation land stations must be limited to
   aeronautical navigation, including obstruction warning.

   (b)  Radionavigation  land  test stations are used for the testing and
   calibration of aircraft navigational aids and associated equipment. When
   used as radionavigation land test stations (MTF) signal generators must be
   licensed as radionavigation land test stations (MTF). Transmission must be
   limited to cases when radiation is necessary and there is no alternative.

   (c) Transmissions by emergency locator transmitter (ELT) test stations must
   be limited to necessary testing of ELTs and to training operations related
   to the use of such transmitters.

   [ 53 FR 28940 , Aug. 1, 1988, as amended at  58 FR 67696 , Dec. 22, 1993]