引言在运行理念和技术还不够成熟的情况下,各国使用的引导飞机进近的主要方式是非精密进近导航方式,它们只为飞机提供航道信息,而不能提供下滑道信息。航空器在进近过程中,容易使得航空器转向目视飞行的时机过早或者过晚,以至于航空器不能进行着陆,从而复飞或 INTRODUCTION Where operational concepts and techniques are not yet mature enough, the primary method used by States for guiding aircraft approaches is the non-precision approach navigation, which provides only information on the flight path for the aircraft and does not provide information on the glideslope. Aircraft are apt to make the transition of the aircraft to visual flight too early or too late during the approach process so that the aircraft can not make a landing and thus make a go-around or