New and Accurate Method of Finding a Ship's Position at Sea (Classic Reprint)
Language: English
Published by Forgotten Books, 2024
- Softcover
- New
Seller: Forgotten Books, London, United KingdomForgotten Books
AbeBooks seller since June 2, 2021
Condition: New
£ 14.10
Quantity: Over 20 available
Add to basketItem description from seller
Print on Demand. 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. 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.…
Seller Inventory # 9781331996620_0
- Title
- New and Accurate Method of Finding a Ship's Position at Sea (Classic Reprint)
- Author
- Thomas H. Sumner
- Publisher
- Forgotten Books
- Publication year
- 2024
- Condition
- New
- Book Type
- print-on-demand item
- Binding
- Paperback
- Language
- English
- ISBN 10
- 1331996627
- ISBN 13
- 9781331996620
- Seller catalogs
- Astronomy
Gentlemen: Agreeably to promise, Inow write my brother, G. B. Well man, to pay you one dollar for the work of Captain Sumner, and never have I spent a. Dollar with more satisfaction, or ever got more value received for the money. I have now given the work a fair trial and am perfectly satisfied that it ist e greatest discovery in the art of Navigation since the discovery of the longitude by chronometer, by Harrison, almost a century ago, and places Capt. Sumner, if not equal, certainly only second, to Nathl. Bowditch, and I look upon it as what has been for a long time among the desiderata of Navigation. It has been a source of anxiety to the Navigator, to ascertain his latitude when meridian altitudes could not be got. The ordinary modes of double altitudes for that purpose, published in most works on Navigation, have not always ah swered the purpose sufficiently to entitle them to implicit confidence. The work of Capt. Sumner has supplied a remedy; for any one with a reasonable knowl edge of the rules and art of Navigation, can ascertain his latitude by following Capt. Sumner's rules, whether he has a chronometer or not; and if he has one, he can ascertain his latitude and longitude at any time when the sun, moon, or stars are visible, and there is a clear horizon. At the present time but few vessels are navigated without a chronometer, and Capt. Sumner has contributed to increase the value of that instrument fourfold.
I have not the honor of a personal acquaintance with Capt. Sumner, but he is one of those web-foots whose acquaintance I should feel an edifying pleas ure in cultivating; at the same time, I am proud to see ahd acknowledge that this discovery has been made by an. American Ship Master. This work should be in the hand of every master of a vessel, aye, and mate too, and should be the never-failing accompaniment of Bowditch's great work on navigation.
Wishing you and Capt. Sumner every success in the sale of this work which its merits entitle it to.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
"Synopsis" may belong to another edition of this title.
Product Description
This Method consists in a new use or application of a single altitude, observed for the longitude by chronometer; and as the suggestion is highly ingenious and very useful when the ship is near the land, it will be rendering a service to our sea men, few Of whom can yet have heard of it, to make it known to them in the pages of the Nautical Magazine.
As this Method arises out Of the employment Of the chronometer, it may be said greatly to enhance the utility of that instrument.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
"About the title" may belong to another edition of this title.
Forgotten Books
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Forgotten Books’ Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the quality of the aged text.
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FB &c Ltd
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London, United Kingdom SW19 2RR
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Forgotten Books publishes hundreds of thousands of rare and classic books.
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value.
The digital edition of all books may be viewed before purchase if you request a sample.
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