Airport Signage: General
Airport markings, signs, and lights (PA.II.D.K3)
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1. Which of the signs in the figure is a mandatory instruction sign? (Refer to Figure 65: U.S. Airport Signs)
Answer (A) is correct. (AIM Para 2-3-8) Mandatory signs have a red background with a white inscription and are used to denote an entrance to a runway or critical area and areas where an aircraft is prohibited from entering. “D” is a “No Entry” sign.
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