Longitudinal separation minima based on time (aircraft flying at the same cruising level on the same track) shall be _______ .a. 15 minutes; b. 10 minutes, if navigation aids. Permit frequent determination of position and speed;c. 5 minutes between aircra
发布于 2021-02-08 23:38:00
【单选题】
A a, c and d
B a and b
C a, b and c
D All above
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