This book has been used for 30 years updated periodically as needed. More than 20000 students have successfully learned ocean navigation from these materials and gone on to cross oceans or circumnavigate the globe. This book covers how to find position at sea from timed sextant sights of the sun moon stars and planets plus other routine and special procedures of safe efficient offshore navigation. No previous navigation experience is required. The only math involved is arithmetic adding and subtracting angles and times. This is a practical howtodoit book which also includes clear explanations of how it works and how to do it well. Plus this book includes other crucial factors of ocean navigation besides just finding out where you are from the stars such as logbook procedures dead reckoning error analysis route planning and more.At the end of this book you will be ready for ocean navigation. The book includes text practice problems tables selections detailed glossary and full solutions. Printable work forms plotting sheets and other resources are available at no charge from celnavbook.Our FitSlope Method presented in this textbook is cited in the latest 2017 edition of Bowditch ampquotThe common method of averaging sights is the FitSlope Method e.g. Burch D. 2015ampnbspCelestial Navigation Second EditionampnbspSeattle Starpath Publications pp. 176177.ampquot ampnbsp ampmdashBowditch American Practical Navigator NGA Pub 9.ampnbspSection 1805.Preface to the Second EditionWe are pleased to say that after ten more years of using this text we do not find reason to change the basic approach and methods of the teaching. We still use most of the same examples which are now quite old but that is the beauty of celestial navigation. It has not changed so we do not benefit in any way from making all new examples which would bring with them more chance of error in a book of many numbers.We have however notably improved and expanded the book. Each section has been updated and refo