Nautical Almanac 1
Description from the publisher
Complete 2009 Nautical Almanac in pdf format complete with monthly star charts.
Includes a crib sheet of the basic formulae to complete a sight and the parallax corrections for the planets which are not normally available.
Other products of this publisher
Combine multiple sights on different tracks. Data available for 9999BC to 9999AD including a Star Atlas, twilights and eclipses. It will print conventional Nautical Almanac pages while the voyage plan is a sophisticated tool in its own right.
Complete 2011 Nautical Almanac in pdf format. Includes monthly star charts with the planet's positions.