1.
maritime radionavigation-satellite service
卫星水上无线电导航业务
2.
radionavigation-satellite service
卫星无线电导航业务
3.
aeronautical radionavigation-satellite service
卫星航空无线电导航业务
4.
earth station in the radio navigation-satellite service
无线电导航卫星业务的地面站
5.
maritime radio navigation service
海上无线电导航业务
6.
aeronautical radionavigation service
航空无线电导航业务
7.
radiodetermination-satellite service
卫星无线电测定业务
8.
aeronautical fixed radio service
固定无线电导航业务
9.
mobile earth station in the radio determination-satellite service
无线电定位卫星业务的移动地面站
10.
fixed earth station in the radiodetermination satellite service
无线电定位卫星业务地面站
11.
Marine Radio Navigation
船舶无线电导航海上无线电导航
12.
maritime radio navigation land station
水上无线电导航陆地电台
13.
orbiting satellites carrying amateur radio
业余无线电用轨道卫星
14.
A transmission path by which radio or other signals are sent to an aircraft or a communications satellite.
上行路线，向上传输传向航天器或通讯卫星的无线电或其他信号的传输路线
15.
four-course radio range station
四航道无线电导航台
16.
aeronautical radio aids
航空无线电导航设备
17.
maritime radio navigation mobile station
海上无线电导航移动电台
18.
Radio and satellite-based navigation systems have greatly reduced the need for large lighthouses in sighting land.
无线电和卫星导航系统已大为降低了对在可视陆地范围内建大型灯塔的需要。