The Nautical Sextant

Autor: W. J. Morris
ISBN: 9780939837892
File Size: 47,43 MB
Format: PDF, Mobi
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The Nautical Sextant reveals in pictures, prose, and perspective the experience and knowledge gained by the author from years of acquiring, studying, and restoring sextants from earlier times and from around the world. This fascinating book owes much of its attraction to the expert description and photos of the mechanics of the sextants and their subassemblies. It is also the story of how different manufacturers, in different times and places, solved the same mechanical problems in different ways in order to perfect one of the most accurate mechanical devices ever produced by man. All of this is complemented by an historical overview to the current day, an overview which has never been published until now. The Nautical Sextant will be of particular value not only to navigators, but also to restorers, collectors, students of technology, curators, and sextant dealers. With its bibliography and extensive use of footnotes, this book will certainly become a classic in its field.

Reed S Sextant Simplified

Autor: Dag Pike
Publisher: Sheridan House, Inc.
ISBN: 9781574091687
File Size: 18,72 MB
Format: PDF, Mobi
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Though contemporary sailors generally use electronic systems to orient themselves, the sextant is far from redundant. This purest of all nautical instruments, which allows seafarers to accurately determine their global position alone and without the aid of modern technology, is still required equipment on all commercial trading vessels; should electronic systems fail, a sextant can make the difference between disaster and survival. In this invaluable tutorial for beginning navigators, Pike clearly and efficiently explains the use and care of the sextant.


Autor: David Barrie
Publisher: Harper Collins
ISBN: 006227936X
File Size: 11,74 MB
Format: PDF, ePub, Docs
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In the tradition of Dava Sobel's Longitude comes sailing expert David Barrie's compelling and dramatic tale of invention and discovery—an eloquent elegy to one of the most important navigational instruments ever created, and the daring mariners who used it to explore, conquer, and map the world. Since its invention in 1759, a mariner's most prized possession has been the sextant. A navigation tool that measures the angle between a celestial object and the horizon, the sextant allowed sailors to pinpoint their exact location at sea. David Barrie chronicles the sextant's development and shows how it not only saved the lives of navigators in wild and dangerous seas, but played a pivotal role in their ability to map the globe. He synthesizes centuries of seafaring history and the daring sailors who have become legend, including James Cook, Matthew Flinders, Robert Fitz-Roy, Frank Worsley of the Endurance, and Joshua Slocum, the redoubtable old "lunarian" and first single-handed-round-the-world yachtsman. He also recounts his own maiden voyage, and insights gleaned from his experiences as a practiced seaman and navigator. Full of heroism, danger, and excitement, told with an infectious sense of wonder, Sextant offers a new look at a masterful achievement that changed the course of history.

Sextants At Greenwich

Autor: W.F.J. Mörzer Bruyns
Publisher: Oxford University Press
ISBN: 0199532540
File Size: 43,76 MB
Format: PDF
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In Sextants at Greenwich the history and development of navigating instruments is described. Before satellite navigation these were used to measure the altitude of the sun and stars above the horizon, to determine the ship's position at sea. The book also contains a catalogue of 347 mariner's astrolabes, cross-staffs, backstaffs, and octants, sextants and artificial horizons preserved in the National Maritime Museum, Greenwich.

The Nautical Almanac 2005

Autor: Great Britain: H.M. Nautical Almanac Office
Publisher: The Stationery Office
ISBN: 9780118873291
File Size: 65,11 MB
Format: PDF, ePub
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The Almanac provides key astronomical information for every kind of sea-going vessel, from cruise liners to fishing boats. It contains tabulations for the Sun, Moon, planets and stars, for use in the determination of position at sea from sextant observations. It also gives details of: times of sunrise, sunset, twilights, moonrise and moonset for use in the planning of observations; interpolation and altitude correction tables; the phases of the Moon; a pole-star table; diagrams and notes for the identification of stars and planets; information on eclipses of the Sun and Moon; and the standard times of most countries. It is prepared jointly by H.M. Nautical Almanac Office and the US Naval Observatory, to meet the requirements of the Royal Navy and the US Navy.

The Apollo Guidance Computer

Autor: Frank O'Brien
Publisher: Springer Science & Business Media
ISBN: 1441908773
File Size: 25,34 MB
Format: PDF, Docs
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The technological marvel that facilitated the Apollo missions to the Moon was the on-board computer. In the 1960s most computers filled an entire room, but the spacecraft’s computer was required to be compact and low power. Although people today find it difficult to accept that it was possible to control a spacecraft using such a ‘primitive’ computer, it nevertheless had capabilities that are advanced even by today’s standards. This is the first book to fully describe the Apollo guidance computer’s architecture, instruction format and programs used by the astronauts. As a comprehensive account, it will span the disciplines of computer science, electrical and aerospace engineering. However, it will also be accessible to the ‘space enthusiast’. In short, the intention is for this to be the definitive account of the Apollo guidance computer. Frank O’Brien’s interest in the Apollo program began as a serious amateur historian. About 12 years ago, he began performing research and writing essays for the Apollo Lunar Surface Journal, and the Apollo Flight Journal. Much of this work centered on his primary interests, the Apollo Guidance Computer (AGC) and the Lunar Module. These Journals are generally considered the canonical online reference on the flights to the Moon. He was then asked to assist the curatorial staff in the creation of the Cradle of Aviation Museum, on Long Island, New York, where he helped prepare the Lunar Module simulator, a LM procedure trainer and an Apollo space suit for display. He regularly lectures on the Apollo computer and related topics to diverse groups, from NASA's computer engineering conferences, the IEEE/ACM, computer festivals and university student groups.

Celestial Navigation In The Gps Age

Autor: John Karl
Publisher: Paradise Cay Publications
ISBN: 9780939837755
File Size: 75,79 MB
Format: PDF, Mobi
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Many books on celestial navigation take shortcuts in explaining concepts; incorrect diagrams and discussion are often used for the sake of moving the student along quickly. This book tells the true story-and the whole story. It conveys celestial navigation concepts clearly and in the shortest possible time.It's tailored for navigation in the GPS age-a time of computers, calculators, and web resources. Although it covers all of the traditional methods of 'working a sight, ' the primary thrust is using the (under $10) scientific calculator. By using equations that you key into your calculator, this book guides you toward a better understanding of the concepts of celestial navigation.You will learn novel ways to plot lines of position, ways to check your sextant accurately by star sights, and how to tell what time it is from a moon sight. The many appendices are a treasure of references and explanations of abstract ideas. Celestial Navigation is a crucial skill for the offshore navigator to know, this book provides the shortest path to that knowledge.

The Sextant Handbook

Autor: Bruce Bauer
Publisher: McGraw Hill Professional
ISBN: 9780070052192
File Size: 26,83 MB
Format: PDF
Read: 5196
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Loran and GPS notwithstanding, there will always be a place for the sextant aboard any blue-water boat, if for no other reason than the thrill and mystery of finding one's position on earth by gazing at the heavens. Here is the indispensable reference that should accompany the instrument aboard. Cmdr. Bruce Bauer, a professional navigator and master mariner with the U.S. Merchant Marine, has distilled years of hands-on experience into an eminently readable guide to buying, adjusting, using, and repairing sextants. The Sextant Handbook is dedicated to the premise that electronic navigation devices, while too convenient to disregard, are too vulnerable to rely on exclusively. The book is designed to make beginner and expert alike conversant with this most beautiful and functional of the navigator's tools. Topics include: Assembly and Disassembly Vital Adjustments Avoiding Problems Rough Weather Sightings Oiling and Cleaning Immersion Baths Emergency Silvering Finding and Buying Used Sextants And Much More You'll also find a list of distributors, manufacturers, and dealers worldwide, a discussion of future trends, and numerous helpful hints, including sighting with eyeglasses and using a Rude starfinder. All in a thoroughly revised edition of a book acclaimed by navigation professionals.