This book is a practical and useful guide for maritime navigation with the purpose of finding the longitude at sea without a chronometer. It contains accurate tables and methods that were used by mariners before the advent of modern navigation tools. The book is a valuable historical record of how navigation was carried out in the past. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

"[A historical study that] breaks down the history of marine navigation in Canada into three broad categories of technology: shipboard navigation, charting, and shore-based navigational aids"--Page v.

This basic reference is filled with practical advise, step-by-step calculations, diagrams, and lots of helpful illustrations. It also introduces the reader to the increasingly sophisticated, satellite-monitoring navigational aids that have become more widely available in recent years.

Provides astronomical data for air navigation. Contains ephemeral data for the year, together with auxiliary tables and graphs, and a brief explanation of the use of the volume. Presents data for the Sun, Moon, Aries, planets, and stars. Includes a CD-ROM in a pocket which contains the same information as found on the printed publication in Portable Document Format (PDF). Requires Adobe Acrobat Reader or similar product to view and print.