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Nautical Almanac 2018

Nautical Almanac 2018
This is a complete copy of the official government edition. This book lists the "locations" of the sun, moon, stars, and planets for every day, hour, minute, and second of the year. Location, as used here, means the latitude (called declination) and longitude (called Greenwich Hour Angle) of the point on earth that is directly below these objects in the sky — this point is called the Geographic Position of the object. The almanac also includes several other tables needed for the practice of celestial navigation. The almanac is an annual publication. The volume for the following year is usually available sometime between late August and late October. Once available, we stock both the present year and the next (200X and 200X+1).
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