Aircraft on the same flying track and at the same altitude under VFR should maintain a longitudinal separation of at least _______ m when cruising above 250km/h.
A.2000
B.3000
C.4000
D.5000
正确答案是D
Aircraft on the same flying track and at the same altitude under VFR should maintain a longitudinal separation of at least _______ m when cruising above 250km/h.
A.2000
B.3000
C.4000
D.5000
正确答案是D