随着全球航空业的飞速发展,空中交通流量急剧增加,基于传统运行方式的航路结构难以满足航班量增加的要求,航路和终端区空中交通拥堵的现象时有发生,影响了飞行安全,降低了运行效益。为此,国际民航组织提出了必备导航性能的概念,在这个概念的影响下,全球航空运输发生了巨大变化, With the rapid development of the global aviation industry, the air traffic flow has dramatically increased. The route structure based on the traditional operation mode can hardly meet the requirement of increasing the flight volume. The phenomenon of air traffic congestion in the route and terminal areas has occurred from time to time, affecting flight safety and reducing Operating efficiency. To this end, ICAO has put forward the concept of essential navigation performance, under the influence of which the global air transport has undergone tremendous changes,