| 2. | In the communication system of cns / atm , vhf data communication is used in busy air space , and aeronautical mobile - satellite service ( amss ) is used in other air spaces , such as ocean and desert , but can improve the flight safety greatly in the navigation system of the cns / atm , global navigation satellite system ( gnss ) is the main elements
在新航行的通信系统中，主要发展数据通信， vhf通信用在繁忙的空域， amss主要用在海洋、荒漠空域，但都能极大地提高飞行安全。 |
