A nautical almanac is a publication describing the positions of a selection of celestial bodies for the purpose of enabling navigators to use celestial navigation to determine the position of their ship while at sea. The positions of 57 selected stars are specified relative to the first point of Aries. The Nautical Almanac contains tabulations of the Sun, Moon, navigational planets and stars for use in the determination of position at sea from sextant observations.
In addition, it gives times of sunrise, sunset, twilights, moonrise and moonset, phases of the Moon and eclipses of the Sun and Moon for use in the planning of observations. Results 1 to 7 of 7.
Thread Tools Show Printable Version. Nautical Almanac: Perpetual or 'Long Term'? Perpetual Nautical Almanac: Sources for?? I am interested in simple long term or perpetual nautical almanacs, understanding that is is likely only the sun and stars Aries that will be so regular that their tables may be simplified. Letcher , contains an 'long term' almanac for Join Date May Posts Uhm, OK, surveying but same problem azimuth and altitudes calculated using spherical trig and the to us so familiar P-Z-X triangle, discussion on precission and formulas Nautical almanac data for the sun and selected stars valid until , plus easy to use, concise sight reduction and altitude correction tables.
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Namespaces Article Talk. Views Read Edit View history.earlier in the "American Nautical Almanac". [7,3] The list of 57 navigational stars in the "American Nautical Almanac" and the "Abridged Nautical Almanac" (the list of "selected stars") reaches its final modern form. The earlier list included a half-dozen different stars. Polaris and Dschubba, for example, previously on the.