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]