end of evening nautical twilight

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0.03 sec.

Occurs when the sun has dropped 12 degrees below the western horizon, and is the instant of last available daylight for the visual control of limited ground operations. At end of evening nautical twilight there is no further sunlight available.See also horizon.

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The event must be at night beyond the end of evening nautical twilight and prior to begin morning nautical twilight.

2nd IBCT, 2nd ID, qualifies JFOs by Wendland, Christopher W. / FA Journal

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