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A Civil Twilight

JSC BIZ, LLC

개발자: JSC BIZ, LLC요금제: 0지역: 0

A Civil Twilight shows the four solar times that define usable light: • First light — morning civil twilight begins • Sunrise — morning twilight ends • Sunset — evening twilight begins • Last light — evening civil twilight ends Glance at your watch or phone and know exactly how much light you have left — out hunting, on the water, flying, photographing, or just planning a dawn run. WHY CIVIL TWILIGHT? Civil twilig...