This guide to celestial navigation has been popular ever since it first appeared in 1969. Revised in 1982, Celestial Navigation is intended to answer the need for a quick, easy, and thorough explanation (with realistically worked problems) of the practice of celestial navigation at sea, using simple and inexpensive equipment. Extracts from the Nautical Almanac and Pub. No. 249, as well as some blank workforms, are included.

This book is written for the mariner who wants to learn the concepts of piloting and navigation, and do more than merely follow a closely prescribed set of rules. While the authors have supplied guidance in the practical matters, such as reading the Almanac and carrying out sight reductions (there are reduction forms in the appendices), they have also provided an understanding of the principles so the sailor can invent new methods when required. Readers are expected to be active participants, and there are many exercises designed to help them along the way. What makes this book different from...