Tables for Azimuths, Great-Circle Sailing, and Reduction to the Meridian (Classic Reprint): With a New and Improved "Sumner" Method - Couverture souple

Blackburne, H. S.

Couverture souple

ISBN 10 : 0365642215 ISBN 13 : 9780365642213

Editeur : Forgotten Books, 2018

Synopsis

Precise azimuths and practical ship positioning for seafarers

Discover how to determine azimuths and latitude with greater accuracy using the Sumner method, supported by compact, ready-to-use tables and plane-chart techniques.

This nonfiction guide presents a streamlined approach to solving the Sumner and double-altitude problems on a single chart. It emphasizes practical accuracy, minimizes interpolation, and shows how to combine ex-meridian observations with chronometer data for reliable results. The text explains the rationale for updated, independently published tables and demonstrates how these methods improve on traditional procedures, especially in low latitudes and near the meridian.

• Learn how to work the Sumner problem on a plane chart with the new methods.
• See how to use small, focused tables (A–D) for quick, accurate azimuths.
• Understand why these updates can reduce errors in position fixes during examinations or real voyages.
• Follow clearly worked examples that illustrate potential errors and how to avoid them.

Ideal for readers of professional navigation references, master mariners, and anyone seeking practical, field-ready techniques for celestial navigation at sea.

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 0365642215
• ISBN 13: 9780365642213
• Reliure: Broché
• Nombre de pages: 205
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