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• Nautical_almanac abstract "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 Almanac specifies for each whole hour of the year the position on the Earth's surface (in declination and Greenwich hour angle) at which the sun, moon, planets and first point of Aries is directly overhead. The positions of 57 selected stars are specified relative to the first point of Aries.In Great Britain, The Nautical Almanac has been published annually by HM Nautical Almanac Office, ever since the first edition was published in 1767.In the United States of America, a nautical almanac has been published annually by the US Naval Observatory since 1852. Since 1958, the USNO and HMNAO have jointly published a unified nautical almanac, for use by the navies of both countries. Almanac data is now available online from the US Naval Observatory.Also commercial almanacs were produced that combined other information. A good example would be Brown's — which commenced in 1877 – and is still produced annually, its early twentieth century subtitle being \"Harbour and Dock Guide and Advertiser and Daily Tide Tables\". This combination of trade advertising, and information \"by permission... of the Hydrographic Department of the Admiralty\" provided a useful compendium of information. More recent editions have kept up with the changes in technology – the 1924 edition for instance had extensive advertisements for coaling stations. Meanwhile the Reeds Nautical Almanac, published by Adlard Coles Nautical, has been in print since 1932, and in 1944 was used by landing craft involved in the Normandy landings.The \"Air Almanac\" of the United States and Great Britain tabulates celestial coordinates for 10-minute intervals for the use in aerial navigation. The Sokkia Corporation's annual \"Celestial Observation Handbook and Ephemeris\" tabulated daily celestial coordinates (to a tenth of an arcsecond) for the Sun and nine stars; it was last published for 2008.To find the position of a ship or aircraft by celestial navigation, the navigator measures with a sextant the apparent height of a celestial body above the horizon, and notes the time from a marine chronometer. That height is compared with the height predicted for a trial position; the arcminutes of height difference is how many nautical miles the position line is from the trial position.".
• Nautical_almanac thumbnail Nautical_almanac_01.png?width=300.
• Nautical_almanac wikiPageExternalLink hist-naut-almanac.
• Nautical_almanac wikiPageExternalLink the-nautical-almanac.
• Nautical_almanac wikiPageExternalLink almanac_data.html.
• Nautical_almanac wikiPageExternalLink AlmanacPagesISAPI.dll.
• Nautical_almanac wikiPageExternalLink Home.aspx.
• Nautical_almanac wikiPageExternalLink history.aspx.
• Nautical_almanac wikiPageID "899067".
• Nautical_almanac wikiPageLength "5141".
• Nautical_almanac wikiPageOutDegree "31".
• Nautical_almanac wikiPageRevisionID "704242320".
• Nautical_almanac wikiPageWikiLink Adlard_Coles_Nautical.
• Nautical_almanac wikiPageWikiLink Almanac.
• Nautical_almanac wikiPageWikiLink Astronomical_object.
• Nautical_almanac wikiPageWikiLink Bowditchs_American_Practical_Navigator.
• Nautical_almanac wikiPageWikiLink Category:Astronomical_almanacs.
• Nautical_almanac wikiPageWikiLink Category:Maritime_books.
• Nautical_almanac wikiPageWikiLink Category:Sailing_books.
• Nautical_almanac wikiPageWikiLink Celestial_navigation.
• Nautical_almanac wikiPageWikiLink Declination.
• Nautical_almanac wikiPageWikiLink Equinox.
• Nautical_almanac wikiPageWikiLink Great_Britain.
• Nautical_almanac wikiPageWikiLink HM_Nautical_Almanac_Office.
• Nautical_almanac wikiPageWikiLink Hour_angle.
• Nautical_almanac wikiPageWikiLink Marine_chronometer.
• Nautical_almanac wikiPageWikiLink Moon.
• Nautical_almanac wikiPageWikiLink Navigation.
• Nautical_almanac wikiPageWikiLink Normandy_landings.
• Nautical_almanac wikiPageWikiLink Planet.
• Nautical_almanac wikiPageWikiLink Prime_meridian_(Greenwich).
• Nautical_almanac wikiPageWikiLink Sextant.
• Nautical_almanac wikiPageWikiLink Sokkia.
• Nautical_almanac wikiPageWikiLink Star.
• Nautical_almanac wikiPageWikiLink Sun.
• Nautical_almanac wikiPageWikiLink The_Nautical_Almanac.
• Nautical_almanac wikiPageWikiLink United_Kingdom_Hydrographic_Office.
• Nautical_almanac wikiPageWikiLink United_States.
• Nautical_almanac wikiPageWikiLink United_States_Naval_Observatory.
• Nautical_almanac wikiPageWikiLink File:Nautical_almanac_01.png.
• Nautical_almanac wikiPageWikiLinkText "Nautical Almanac".
• Nautical_almanac wikiPageWikiLinkText "Nautical almanac".
• Nautical_almanac wikiPageWikiLinkText "Navigational ephemeris tables".
• Nautical_almanac wikiPageWikiLinkText "almanac".
• Nautical_almanac wikiPageWikiLinkText "almanacs".
• Nautical_almanac wikiPageWikiLinkText "nautical almanac".
• Nautical_almanac wikiPageWikiLinkText "navigation stars".
• Nautical_almanac wikiPageWikiLinkText "navigational almanacs".
• Nautical_almanac wikiPageUsesTemplate Template:About.
• Nautical_almanac wikiPageUsesTemplate Template:Navigation_publications.
• Nautical_almanac wikiPageUsesTemplate Template:Portal.
• Nautical_almanac wikiPageUsesTemplate Template:Reflist.
• Nautical_almanac wikiPageUsesTemplate Template:Works_about_sailing.
• Nautical_almanac subject Category:Astronomical_almanacs.
• Nautical_almanac subject Category:Maritime_books.
• Nautical_almanac subject Category:Sailing_books.
• Nautical_almanac hypernym Publication.
• Nautical_almanac type Book.
• Nautical_almanac type PeriodicalLiterature.
• Nautical_almanac type Work.
• Nautical_almanac type Book.
• Nautical_almanac type Work.
• Nautical_almanac comment "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 Almanac specifies for each whole hour of the year the position on the Earth's surface (in declination and Greenwich hour angle) at which the sun, moon, planets and first point of Aries is directly overhead.".
• Nautical_almanac label "Nautical almanac".
• Nautical_almanac sameAs Q752001.
• Nautical_almanac sameAs Almanac_nàutic.
• Nautical_almanac sameAs Astronomisches_Jahrbuch.
• Nautical_almanac sameAs Αστρονομικές_εφημερίδες.
• Nautical_almanac sameAs Almanaque_náutico.
• Nautical_almanac sameAs אלמנך_(ניווט).
• Nautical_almanac sameAs Astronomescht_Joerbuch.
• Nautical_almanac sameAs Nautische_almanak.
• Nautical_almanac sameAs m.03m_ql.
• Nautical_almanac sameAs Nautisk_almanacka.
• Nautical_almanac sameAs Q752001.
• Nautical_almanac wasDerivedFrom Nautical_almanac?oldid=704242320.
• Nautical_almanac depiction Nautical_almanac_01.png.
• Nautical_almanac isPrimaryTopicOf Nautical_almanac.