A red and white indication on a standard VASI defines which condition?
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On the glide slope
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Below Glide slope
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Above glide slope
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None of these
A
Correct answer
Explanation
In a standard VASI, when you see red lights on the far bar and white lights on the near bar (red-on-white), you're precisely on the correct glide slope. This configuration indicates you're at the proper descent angle for landing. Deviations from this pattern signal that you need to adjust your pitch: more white means climb, more red means descend.