下列哪种进近不适用CDFA技术？which of the following is not suitable for CDFA？
A.VOR进近。VOR approach
B.NDB进近。NDB approach
C.目视盘旋进近。visual circling approach
正确答案是C
下列哪种进近不适用CDFA技术？which of the following is not suitable for CDFA？
A.VOR进近。VOR approach
B.NDB进近。NDB approach
C.目视盘旋进近。visual circling approach
正确答案是C