New and Accurate Method of Finding a Ship's Position at Sea (Classic Reprint)

Thomas H. Sumner

ISBN 10: 1331996627 / ISBN 13: 9781331996620

Published by Forgotten Books Apr 2018, 2018

About this Item

Neuware.

Seller Inventory # 9781331996620

Bibliographic Details

• Title: New and Accurate Method of Finding a Ship's Position at Sea (Classic Reprint)
• Publisher: Forgotten Books Apr 2018
• Publication Date: 2018
• Language: English
• ISBN 10: 1331996627
• ISBN 13: 9781331996620
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 229W x 152H x 5D millimeters 229 millimeters width by 152 millimeters height by 5 millimeters depth
• Weight: 273 grams

About this title

Synopsis

This book unlocks a method developed by the author to accurately determine a ship's position at sea, even when critical information such as latitude or time is uncertain. The author explains this method, using principles of spherical trigonometry, to project parallels of equal altitude on a nautical chart. He demonstrates how using two altitudes, observed at any hour and at any angle from the meridian, makes it possible to obtain both the true latitude and longitude of the ship, an innovation that greatly enhances the accuracy of celestial navigation and makes utilizing a single altitude a viable option when necessary. Throughout the book, the author provides examples and detailed instructions for practical application. The method presented in this book greatly facilitates the use of double altitudes and elevates the accuracy of single-altitude observations, a technique that remains as relevant today as when it was first developed.