The Sumner Line (Classic Reprint): Or Line of Position as an Aid to Navigation - Couverture souple

George C. Comstock

9780282679101: The Sumner Line (Classic Reprint): Or Line of Position as an Aid to Navigation

Couverture souple

ISBN 10 : 0282679103 ISBN 13 : 9780282679101

Editeur : Forgotten Books, 2018

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Master the Sumner line method to fix a ship’s position at sea with confidence. This practical guide shows how to reduce observations of the sun, moon, and stars into reliable lines of position, using standard forms, tables, and example problems.

This edition explains the core ideas behind the Sumner line, discusses how to use spherical traverse tables, and compares different reduction methods. It emphasizes practical steps, clear notation, and hands-on exercises that help navigators apply the method at sea or in training.

How to convert celestial observations into a line of position with step-by-step reductions

How to use form templates and computing aids to organize data quickly

How to interpret tables and interpolate accurately for common navigational scenarios

How to check results and reconcile with dead reckoning for improved accuracy

Ideal for readers with some navigation knowledge who want to expand their tools for fixing a ship’s position at sea, including those studying traditional methods and modern sailors seeking historical perspective.

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�diteur: Forgotten Books
Date d'�dition: 2018
Langue: anglais
ISBN 10: 0282679103
ISBN 13: 9780282679101
Reliure: Broch�
Nombre de pages: 88
Coordonn�es du fabricant: Copytech (UK) Ltd, Trading as Printondemand-worldwide.com
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The Sumner Line: Or Line of Position as an Aid to Navigation (Classic Reprint)

George C. Comstock

Edit� par Forgotten Books, 2018

ISBN 10 : 0282679103 ISBN 13 : 9780282679101

Neuf Paperback

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Vendeur : Forgotten Books, London, Royaume-Uni

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Paperback. Etat : New. Print on Demand. This book is a guide to using the Sumner line method, a technique for determining a ship's position at sea. Developed in the 19th century, this method revolutionized nautical navigation by offering a more accurate alternative to traditional dead reckoning. The author explains the fundamentals of the Sumner line, which relies on celestial observations and calculations to determine a ship's location, focusing on the principles of astronomy and spherical trigonometry. The book provides a clear and concise explanation of the Sumner line, breaking down the complex calculations into manageable steps and incorporating numerous illustrative examples. It delves into the various methods of utilizing the Sumner line, including the Marc St. Hilaire technique, and examines the use of the Spherical Traverse Table, a tool crucial for solving spherical triangles. Through its comprehensive approach, the book equips readers with the practical skills and knowledge necessary to master the Sumner line method, empowering them to navigate the vast expanse of the ocean with confidence. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. N� de r�f. du vendeur 9780282679101_0

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