Long Term Almanac 2000-2050: For the Sun and Selected Stars With Concise Sight Reduction Tables, 2nd Edition (Hardcover)Nautical almanac data for the sun and selected stars valid until 2050, plus easy to use, concise sight reduction and altitude correction tables. Plus work forms to make the process even easier. A concise one book solution for celestial navigation. It takes a few extra steps to get GHA and dec with the Long Term Almanac, since it does it without the usual 10 pounds of reference books, but with practice it takes just a few minutes longer than normal