Civil, Astronomical and Nautical Twilight Magic
Civil twilight is defined when the sun is 6 degrees below the horizon. In the morning this is known as dawn, in the evening it is called dusk.
Astronomical twilight is defined when the sun is 18 degrees below the horizon. Before the beginning of astronomical twilight in the morning and after the end of astronomical twilight in the evening the sun does not contribute to sky illumination; for a considerable interval after the beginning of morning twilight and before the end of evening twilight, sky illumination is so faint that it is practically imperceptible.
Nautical twilight is defined to begin in the morning, and to end in the evening, when the center of the sun is geometrically 12 degrees below the horizon. At the beginning or end of nautical twilight, under good atmospheric conditions and in the absence of other illumination, general outlines of ground objects may be distinguishable, but detailed outdoor operations are not possible. During nautical twilight the illumination level is such that the horizon is still visible even on a Moonless night allowing mariners to take reliable star sights for navigational purposes, hence the name.
My favorite * False dawn
During certain times of the year, the horizon near the rising sun will begin to glow unusually early. This early glow does not originate directly from the Sun, but rather from sunlight reflected by interplanetary dust. Called zodiac light, the glowing triangle of light may be mistaken, for a while, for a sunrise, and so may be called a false dawn.
Most people just see it as a sunrise but for many of us who fish it is a magic time on the water. As you head out with the moon and stars and that first glimmer of light your inside stirs with excitement. What will water the produce. It’s all magic.
Adrenaline is running seeing the boards on the water already–> dedication to the wave people! Beautiful to see!
I have thrown out the first cast already in an attempt to experience a glimmer of what I was able to do this past fall. Always the fish that saves me.
Next blog… a fantastic Rod Builder and worthy cause!