The Air Almanac
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Picture of the 2019 Air Almanac box and CD The Air Almanac contains the astronomical data required for air celestial navigation. The book 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 Air Almanac is available nine months in advance of its edition date.

Beginning with the 2008 edition, The Air Almanac is available only in PDF format. It is expected that those requiring a paper copy of certain pages will have access to a printer. Starting with the 2015 edition, users may download the entire almanac free of charge, although the CD is still available for purchase through the Government Printing Office (GPO). Two versions are available. The file airaYY_all.pdf is the entire publication in one large PDF file. The file also contains the entire publication in PDF format, but uses your web browser to navigate through the pages. The .zip file is virtually identical to the CD sold by GPO.

Editions of The Air Almanac Available for Download
Year Title Link File Size
2019 aira19_all.pdf 43 MBytes
2019 46 MBytes
2018 aira18_all.pdf 36 MBytes
2018 49 MBytes
2017 aira17_all.pdf 37 MBytes
2017 48 MBytes
2016 aira16_all.pdf 54 MBytes
2016 48 MBytes
2015 aira15_all.pdf 59.5 MBytes
2015 49.5 MBytes

Some links of interest for The Air Almanac: