The Nautical Almanac
The free online Nautical Almanac
The world's most complete source of free celestial navigation information

The Nautical Almanac
1911, 1981 & 2000 through 2020
All Almanacs were generated by Pyalmanac on March 2016

Everything you need
for 2017

click here

The Sun only Almanac
2015 through 2020
All Almanacs were generated by Pyalmanac on March 2016

Astronomical Phenomena
2015 through 2017

Essential Celestial Navigation downloads

Increments & Corrections for the Sun (on 2 pages)
Increments & Corrections for Sun, Planets, Aries, Moon (the "yellow pages")

Explanation of The Nautical Almanac Daily pages

PUB. NO. 249 Vol. 1- 2015
   (size- 180 meg)  (courtesy of Celestaire)
PUB. NO. 249 Vol. 2
PUB. NO. 249 Vol. 3

PUB. NO. 229

Altitude Correction Tables for the Moon
Polaris- Correction for (Q) (2017)

TABLE 4- GHA and Declination of the Sun for the Years 2001 to 2036
TABLE 4- Long Term GHA Aries

TABLE 5- Correction to Tabulated Altitude for Minutes of Declination
TABLE 3- Conversion of Arc to Time

Navigational Star Chart

2016 Navigational Stars SHA & Dec
2017 Navigational Stars SHA & Dec

The Air Almanac- 2016 (be patient- it's 900 pages)
The Air Almanac- 2017

Universal Plotting Sheet

Celestial Navigation Forum
Discuss and learn about Celestial Navigation.
All are welcome!

    Complete Sun & Star sight reduction Procedure

‣  Methods & Forms

‣  Celestial Navigation Formulas

‣  Useful Links

‣  Sun Sight Reduction Excel Spreadsheet
            A Sun sight reduction program!  From

Complete Celestial Sight Reduction Excel Spreadsheet
            Covers all navigational bodies. 

Complete Celestial Sight Reduction Spreadsheet in ODS format
            Covers all navigational bodies.  Can be used in LibreOffice Calc.

American Practical Navigator
The complete work & various selections

Disclaimer and Warning
Prior to use verify the accuracy of The Nautical Almanac or data you download from this site.  They SHOULD NOT and MUST NOT be relied upon for celestial navigation work of any sorts or any purpose whatsoever.  You use them at your own risk or peril.

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Notice to any government agency or government ogranization. is exclusively an archival and educational website and derives no remuneration from anything presented on the site. The site's sole purpose is to preserve and disseminate information about the art and science of celestial navigation.

Before contacting be aware that we may disclose and publish all communication between us and you without redaction of content. By communcating with you acknowledge that you have no right or expectation of privacy both in content, substance or method nor will be bound or obligated to regard any notice from you ordering us not to disclose such content.

The Nautical Almanacs and Sun Almanacs listed at the top of our site were created or derived from a program written by the great Norwegian sailor Enno Rodegerdts.  Without his work this site wouldn't exist.

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