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Two sample pages of the 2002 Nautical Almanac published by the U.S. Naval Observatory. 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.
NAVEPHM implements a procedure for the determination of the position of the Sun, Moon and navigational planets that reproduce 'The Nautical Almanac' and 'The Air Almanac' to within 0.2'. Keywords include: Navigation, Air Almanac, Ephemeris, Spheroid Earth, Spherical Triangle, Almanac, Nautical Almanac, Great Circle, Rhumb Line, and General ...
Two sample pages of the 2002 Nautical Almanac. The Nautical Almanac has been the familiar name for a series of official British almanacs published under various titles since the first issue of The Nautical Almanac and Astronomical Ephemeris, for 1767: [1] this was the first nautical almanac to contain data dedicated to the convenient determination of longitude at sea.
The American Ephemeris and Nautical Almanac was published for the years 1855 to 1980, containing information necessary for astronomers, surveyors, and navigators. It was based on the original British publication, The Nautical Almanac and Astronomical Ephemeris, with which it merged to form The Astronomical Almanac, published from the year 1981 to the present.
The selection of the stars is made by His Majesty's Nautical Almanac Office and the US Naval Observatory, in the production of the yearly Nautical Almanac which the two organizations have published jointly since 1958. [2] Criteria in the choice of stars includes their distribution across the celestial sphere, brightness, and ease of ...
As of 2019 it is still published by the U.S. Government and is available free online from the National Geospatial-Intelligence Agency (NGA), the modern successor agency to the 19th Century Hydrographic Office. The publication is considered one of America's nautical institutions. [citation needed]
Air Almanac [11] Astronomical Almanac; Astronomical Phenomena [12] The Astronomical Pocket Diary (1987–present) Multiyear Interactive Computer Almanac [13] The Nautical Almanac (1767–present under various titles; prepared by U.S. Naval Observatory and Her Majesty's Nautical Almanac Office since 1958) Star Almanac for Land Surveyors [14]