aeronautical radio navigation land station
maritime radio navigation land station
radio navigation station
maritime radio navigation land
aerodrome control radio station
aeronautical ground radio station
aeronautical radio navigation
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
aeronautical radio station
aids to navigation radio control
air force radio station
aircraft radio station certificate
air-ground control radio station
amplitude radio navigation system