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Lectures in Navigation

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About This Book

A practical course of navigation lectures presents elementary and applied seamanship for junior deck officers, pairing concise explanations with worked examples and exercises. Early lessons cover piloting and instruments, including compass use and errors, pelorus, parallel rulers, sounding gear, charts, protractors and sextant adjustments. Dead reckoning and sailing methods—plane, traverse, Mercator and great-circle—are developed with useful tables and example problems alongside chronometer and timekeeping instruction. Celestial navigation chapters explain celestial coordinates, almanac use, sight reduction and correction, line-of-position techniques, latitude and longitude by sun and star sights, and basic star identification methods. Final lectures outline routine shipboard navigation, compass deviation and adjustment, and a navigator’s day work practice.

About the Author

Draper, Ernest Gallaudet portrait

Ernest Gallaudet Draper

Ernest Gallaudet Draper was an American author and educator, primarily recognized for his contributions to the field of navigation. His notable work, "Lectures in Navigation," reflects his expertise and dedication to teaching the principles of navigation. Draper's writings are characterized by their clarity and practical approach, making complex concepts accessible to learners. His work has been influential in maritime education, contributing to the understanding of navigation techniques and practices.

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