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An airport's rotating beacon operated during daylight hours indicates

A

there are obstructions on the airport.

B

that weather at the airport located in Class D airspace is below basic VFR weather minimums.✓ Correct Answer

C

the Air Traffic Control tower is not in operation.

Explanation

AIM 2-1-9 explains that in Class B, C, D and E surface areas, operation of the airport beacon during daylight often indicates that the ground visibility is less than 3 miles and/or the ceiling is less than 1,000 feet, below basic VFR minimums, though pilots should not rely on the beacon alone. It is not an obstruction warning and does not signal that the tower is closed.

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