airport operationsFAA-published sample question (FIA, Aug 2021)
The visual glidepath of a 2-bar VASI provides safe obstruction clearance within plus or minus 10° of the extended runway centerline and to a distance of how many miles from the runway threshold?
A
4 NM.✓ Correct Answer
B
6 NM.
C
10 NM.
Explanation
AIM 2-1-2 says the VASI visual glide path provides safe obstruction clearance within plus or minus 10 degrees of the extended runway centerline and to 4 NM from the runway threshold. 6 and 10 NM overstate the protected distance.
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