The most effective technique to use for detecting other aircraft at night is to
A
turn the head and sweep the eyes rapidly over the entire visible region.
B
avoid staring directly at the point where another aircraft is suspected to be flying.✓ Correct Answer
C
avoid scanning the region below the horizon so as to avoid the effect of ground lights on the eyes.
Explanation
At night the center of the eye has a blind spot for dim objects, so the FAA recommends not staring directly at where traffic is expected but looking slightly off center and scanning slowly. Rapid sweeping prevents detection, and the area below the horizon must still be scanned.
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