aeronautical radio navigation
aeronautical radio navigation land station
aeronautical radio navigation satellite service
aeronautical radio navigation service
航空无线电助航业务
航海无线电助航业务
航空助航业务
航空无线电导航服务
aids to navigation radio control
amplitude radio navigation system
auto-measurement instrument for AM radio transmitter
digital microwave radio transmitter-receiver equipment
Global Radio Navigation System
ground radio navigation aid
HFRT High Frequency Radio Transmitter
illegal radio transmitter equipment
marine radio navigation
maritime radio navigation land station
maritime radio navigation service
maritme radio navigation mobile station
miniature radio transmitter
portable radio transmitter