The first three sections of this more than 300-page book are a complete and accurate duplication from the official Nautical Almanac produced jointly by Her Majesty’s Nautical Almanac Office and the Nautical Almanac Office of the U.S. Naval Observatory.
The main contents of this Almanac consist of data from which the Greenwich Hour Angle (GHA) and the Declination (Dec) of all the bodies used for navigation can be obtained for any instant of Universal Time (UT), or Greenwich Mean Time (GMT).
This publication contains the full information for celestial body location from the 28th of October of one year, through the 31st of December of the following year. It also lists the Standard Times around the world, Star Charts, Polaris (Pole Star) Tables, Sight Reduction Procedures, Sight Reduction Table, Increments & Corrections, Altitude Correction Tables, Conversion of Arc to Time