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Sentences with phrase «civil twilight hours»
However, if the sUAS has appropriate anti-collision lighting visible for at least 3 statute miles, the sUAS may operate during
civil twilight hours
.
https://www.nar.realtor/
Civil twilight hours
are defined as the period of time that begins 30 minutes before official sunrise and 30 minutes after official sunset.
https://www.nar.realtor/
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