第 1/1 張圖片
History of the Navigator's Sextant by Charles H. Cotter (Hardback, 1985)
狀況：
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eBay 物品編號：402588558014
物品細節
- 物品狀況
- Topic
- Sextant, Navigation, Maritime
- Publication Year
- 1985
- Special Attributes
- 1st Edition
- ISBN
- 9780851744278
- Subject Area
- Marine Science
- Publication Name
- History of the Navigator's Sextant
- Publisher
- Brown, Son & Ferguson LTD
- Subject
- Engineering & Technology
- Type
- Textbook
- Format
- Hardcover
- Language
- English
- Item Height
- 245mm
- Item Width
- 185mm
- Item Weight
- 911g
- Number of Pages
- 236 Pages
關於產品
Product Information
This pre-history of the sextant, as we might call it, will emphasize the problems that were to be overcome in leading up to the invention, or rather evolution, of an instrument that has for long been the very symbol of the navigator's art, and an instrument the simple scientific principles of which have so beautifully been adapted to allow the navigator to measure accurately the altitude of a heavenly body from the deck of a ship at sea. Following the brief opening introductory chapter the second chapter examines the instruments used by land-based astronomers for measuring the heavens, some of which instruments appear to have been adapted for sea use. The succeeding chapters deal, in turn with each class of instrument designed specifically for use at sea, starting with the Seamen's Quadrant, followed by the Mariner's Astrolabe, the various Shadow Staffs and the early reflecting instruments, to the Hadley Quadrant, the immediate ancestor of the modern sextant. Although the sextant is essentially an instrument for the nautical astronomer, its use in surveying and coastal navigation is important: Chapter 11 is devoted to this aspect of the sextant. The following chapter describes the several attempts that have been made to provide an artificial horizon for marine use. The application of nautical astronomy to the navigation of aircraft led to rapid improvements to the marine sextant which was adapted for use in the air. But soon specially-designed altitude measuring instruments were produced to meet the specific needs of airmen. These instruments are described in the closing chapter of the book. Astronomical navigation in the air was but short-lived a matter of three or four decades at most. Nautical astronomy for air navigation became obsolete when aircraft speeds became so great that new powerful radio and electronic techniques were developed for air navigation. Many of these techniques are now being used by marine navigators, so that it is unlikely that we shall witness any significant advances in nautical astronomy. The sextant, thus, appears to have reached the acme of its perfection: what better time, therefore, to set down its long and fascinating history?
Product Identifiers
Publisher
Brown, Son & Ferguson LTD
ISBN-13
9780851744278
eBay Product ID (ePID)
91545484
Product Key Features
Subject Area
Marine Science
Publication Name
History of the Navigator's Sextant
Format
Hardcover
Language
English
Subject
Engineering & Technology
Publication Year
1985
Type
Textbook
Number of Pages
236 Pages
Dimensions
Item Height
245mm
Item Width
185mm
Item Weight
911g
Additional Product Features
Country/Region of Manufacture
United Kingdom
賣家提供的物品說明
賣家必須承擔此刊登物品的所有責任。
eBay 物品編號：402588558014
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亞洲, 南非, 埃及, 歐洲, 澳洲, 留尼汪島, 紐西蘭, 美洲
排除：
也門, 俄羅斯聯邦, 利比亞, 烏克蘭, 瑙魯, 索馬里, 阿富汗
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