离场航线 meaning in English

departure route
outbound route

Such research can lead to a new flight procedure design methodology , which copes with these problems and makes strong economical senses . under the guidance of aviation safety , efficiency , regularity and economy , this thesis applies the principle of the instrument flight procedure , firstly , to research the current vor / dme instrument flight procedure , namely the vor / dme instrument flight procedure ( vor / dmf . ifp ) , its holding procedures , departure routes , arrival routes , and approach procedures , cor the terminal airspace
本文在安全、效率、正常和经济的原则下，运用仪表飞行程序设计的思想和原则，首先对在vor / dme导航台上建立仪表进场航线、等待程序、仪表进近程序和仪表离场航线等机场空域内的飞行程序的设计方法进行了研究，总结出不同位置的vor / dme仪表飞行程序的布局形式、适用情况及其优缺点，并首次提出了以vor / dme为基准的封闭圆弧进近程序；其次，研究了基于vor / dme导航台的区域导航飞行程序的设计方法；最后，研究了在现有的vor / dme仪表飞行程序上建立区域导航飞行程序的设计方法。