This book has been used for 30 years, updated periodically as needed. More than 20,000 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, m...

"Secrets' is the modern Bowditch, written so clearly that navigation and seamanship will be comprehensible to anyone . . ."-- Dave and Jaja Martin, circumnavigators and authors of Into the Light: A Family's Epic Journey "It's a great book. The prose is simple and clear . . ." --John Vigor, author of...

Nathanial Bowditch first published this encyclopedic work in 1802. During the last two centuries over 75 editions, almost 1,000,000 copies, of Bowditch have been published by the US Government. It has lived because it has combined the best technologies of each generation of navigator. This Edition i...

The American Practical Navigator, first published in 1802, was billed as the “epitome of navigation” by its original author, Nathaniel Bowditch, an early American mathematician who is often considered the founder of modern maritime navigation. The text, often colloquially referred to simply as “Bowd...