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[1] [2] In the United States, a nautical almanac has been published annually by the US Naval Observatory since 1852. [2] It was originally titled American Ephemeris and Nautical Almanac. Since 1958, the USNO and HMNAO have jointly published a unified nautical almanac, The Astronomical Almanac for use by the navies of both countries. [2]
The United States Naval Observatory (USNO) ... In 1849, the Nautical Almanac Office (NAO) was established in Cambridge, Massachusetts as a separate organization.
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.
References like the Nautical Almanac and The American Practical Navigator provide four star charts, covering different portions of the celestial sphere. Two of these charts are azimuthal equidistant projections of the north and south poles. The other two cover the equatorial region of the celestial sphere, from the declination of 30° south to ...
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]
The new Bureau was initially responsible for providing nautical charts and instruments and for supervising the US Naval Observatory, the Hydrographic Office, and the Nautical Almanac Office. It also had responsibility for the United States Naval Academy , which previously under been under the jurisdiction of the Bureau of Ordnance and Hydrography.
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 ...