First light happens before dawn, before the highest point of the Sun achieves the skyline. Cosmic Dawn is the time when it ends up conceivable to identify light in the sky, when the sun is 18° beneath the skyline. Nautical Dawn happens at 12° beneath the skyline, when it winds up conceivable to see the skyline appropriately and recognize a few articles. Common Dawn happens when the sun is 6° beneath the skyline and there is sufficient light for exercises to occur without fake lighting.