small sextant icon Sun Almanac

First of all let me say this is not a comprehensive Nautical Almanac. If you are the sort of navigator who shoots multiple starsights at dawn and dusk, and works out his Longitude from Lunar Distance, this is not the Almanac for you.

If however you are new to Astro Navigation, or are content to establish your position solely from the Sun, this Almanac and the associated Sight Reduction Tables will suffice.

To reduce a Sunsight the only things you need to know are the height of the Sun above the horizon, the precise time of your sight, plus the Greenwich Hour Angle (GHA) and Declination of the Sun. Your sextant, a decent watch, this Almanac and the correct Sight Reduction Tables for your Latitude will give you all information you need.

Be sure to download the Almanac for the correct year! I've left previous years available in case someone wants to re-work some old sights.
The files are <300KB each.


The Almanac now includes a table giving the Meridian Passage of the Sun for every day of the year. This table is only valid for one year.

The Almanac includes pages for GHA Interpolation, Declination Corrections and Sextant corrections. These pages do not go out of date.

I've also taken the opportunity to reformat the tables, hopefully making them a little easier to read.

2017 Sun Almanac
2016 Sun Almanac
2015 Sun Almanac
2014 Sun Almanac
2013 Sun Almanac
2012 Sun Almanac
2011 Sun Almanac
2010 Sun Almanac

If you require a more comprehensive Nautical Almanac have a look on the Links page where you will find a number of suggestions.

Finally, just in case you think astronavigation is too difficult, here's a picture of my son taken when he was 10. He's 'shooting the sun' with my 1939 Husun vernier sextant while his little sister looks on. We then went on to reduce the second sight of the day for our Sun-run-Sun fix.


shooting the sun