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 course, which includes clear explanations of how it works and how to do it well. Plus this course 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, etc. At the end of this course, you will be ready for ocean navigation. Thousands of mariners have successfully learned celestial from these materials and gone on to cross oceans and circumnavigate the globe. The course is designed around a unique work form that makes all sextant sights essentially the same. The form and procedures have been developed and tested with the help of tens of thousands of students over the past 25 years. You will soon be doing the sextant-sight reductions of the sun, moon, stars, and planets, with little more than a glance at the work form. It reminds you what to do at each step, and then carries you on to the next.