The most effective method of scanning for other aircraft for collision avoidance during nighttime hours is to use
A
regularly spaced concentration on the 3-, 9-, and 12-o'clock positions.
B
a series of short, regularly spaced eye movements to search each 30-degree sector.
C
peripheral vision by scanning small sectors and utilizing offcenter viewing.✓ Correct Answer
Explanation
At night the center of the eye is nearly blind to dim objects, so the FAA recommends using peripheral vision: scan small sectors and look slightly off center so the rod cells detect the traffic. Short, regularly spaced eye movements through sectors is the daytime technique, and concentrating on a few clock positions leaves most of the sky unchecked.
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