A surface longitudinally centered on the extended runway centre line and extending outward and upward from each end of the primary surface is known as

A surface longitudinally centered on the extended runway centre line a

1.	A surface longitudinally centered on the extended runway centre line and extending outward and upward from each end of the primary surface is known as
A.	conical surface
B.	transition surface
C.	approach surface
D.	horizontal surface
Answer» D. horizontal surface

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A surface longitudinally centered on the extended runway centre line and extending outward and upward from each end of the primary surface is known as

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