The minimum safety altitude for IFR flight refers to the highest point 25km along each side of the airway. MSA should not be below _______ m in hilly or mountainous areas.
A.300
B.400
C.500
D.600
正确答案是D
The minimum safety altitude for IFR flight refers to the highest point 25km along each side of the airway. MSA should not be below _______ m in hilly or mountainous areas.
A.300
B.400
C.500
D.600
正确答案是D