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Civil Twilight
The period after sunset or before sunrise when the sun is no more than 6 degrees below the horizon. The FAA defines night for logging purposes as the time between the end of evening civil twilight and the beginning of morning civil twilight.
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Learn more in Private Pilot License→Related Terms
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- CTAF (Common Traffic Advisory Frequency)The frequency used by pilots to announce position and intentions at nontowered airports. CTAF communications help aircraft maintain traffic awareness in the pattern and on the ground when no control tower is operating.