The next page has data about refractional corrections.The page after that provides tables for low altitudes of observations for the same The inside of the front cover has tables for the correction of altitudes of Sun, stars and planets.The position of the sun, the moon, the other planets and 57 main stars are also used along with the GMT and the earth’s position to calculate the potential navigational routes. Reading the bullet points will be easier if one has the almanac open in front for easy reference.Ī nautical almanac uses the time position as per the GMT (Greenwich Meridian Time) along with the position of the earth to calculate and predict the sea-routes. The nautical almanac contains astronomical data for the entire year which assists the navigator in making astronomical calculations on ship. Nautical Almanac is a type of navigation aid, which describes the position of celestial bodies to assist navigators at sea to determine their ship’s position using celestial navigation.
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