A celestial navigation book unlike any other, including understanding lunar distances. This book is dedicated simply to removing the cloak of mystery, to teach the concepts, some interesting history, the techniques, and computational methods using the simple pocket scientific calculator. And yes, also how to build your own navigational tools. Included in the appendix are S-tables and work sheets to do your own sight reduction without computers or calculators. At my web site (http://www.teacupnavigation.net) is free celestial nav software to download. You will enjoy this software!