The Air Almanac for the Year 2018

The Air Almanac for the Year 2018
The Air Almanac for the Year 2018
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The Air Almanac contains the astronomical data required for air celestial navigation. The download-version contains the same data found on the CD-ROM, but in a single bookmarked PDF.  It provides the following data tabulated at 10-minute intervals to a precision of 1 arcminute: the Greenwich hour angle and declination of the Sun, Moon, and three navigational planets; the Greenwich hour angle of Aries; rise and set times of the Moon for a range of latitudes; and other data. Each edition also contains sky diagrams for each month; sunrise, sunset, and twilight tables; and positions of the navigational stars.  The data are produced in collaboration between The U.S. Naval Observatory in the U.S. and Her Majesty's Nautical Almanac Office (HMNAO) in the UK. HMNAO maintains the copyright on the material it produces.

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Table of Contents

1 – 734 “Daily Pages”, tabulated in 10 minute intervals, for edition year
F1 – F2 Navigational Star Chart
F3 – F4 Star index, Interpolation of GHA chart, for edition year
Title  Title page
A1  Preface
A2 – A17 Explanation of use of book
A18 – A19 Symbols and Abbreviations
A20 – A23 Standard Times of Many Countries
A24 – A25 Explanation of Sky Diagrams
A26 – A121 Sky Diagrams for Air Celestial Navigation, for edition year
A122 – A124  Planet Location Diagrams, for edition year
A125 – A129 Star Recognition Diagrams
A130 – A145 Sunrise, Sunset and Civil Twilight, for edition year
A146 – A152 Rising, Setting, and Depression Graphs
A153  Sunlight and Twilight at Polar Regions
A154 – A156 Semi-duration of Moonlight at Polar Regions, for edition year
A157 – A163 Stellar data, for edition year
A164  Interpolation of G.H.A. of the Sun
A165  Interpolation of G.H.A. of Aries
A166  Conversion of arc to time
A167  Corrections to Sextant Altitude
Insert  CD-ROM, PDF page images of current edition
Cover 3 Dome refraction, Corrections to Marine Sextant, Contents


Flyers and flight instructors serving in the U.S. and U.K military forces. Commercial flyers and instructors seeking information about air nautical issues.

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