Longitudinal separation based on time for the aircraft flying on

分类: 执照英语题 发布时间: 2023-12-01 12:13 浏览量: 0

Longitudinal separation based on time for the aircraft flying on crossing track shall be _______ a. 15 minutes;b. 10 minutes if navigation aids permit frequent determination of position and speed.

A.a

B.b

C.a and b

D.a or b

正确答案是D