This interactive site allows you to obtain all the astronomical information necessary to plot navigational lines of position from observations of the altitudes of celestial bodies. A table of data is provided giving both almanac data and altitude corrections for each celestial body that is above the horizon at the place and time that you specify all care of the US Navy ..
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HMNAO also produces astronomical data suitable for a wide range of users, including professional and amateur astronomers, mariners, aviators, surveyors, the armed forces, lawyers, religious groups, architects, schools, diary and calendar publishers, photographers and film crews. This information can be accessed via the web by using Websurf. This facility is in a beta test phase and the data produced by this service are for personal use only. Those without web access should contact the Astronomy Information Service of the Royal Observatory, Greenwich. All commercial users should contact HMNAO directly |
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