David Burch – författare

This book has been used for 30 years, updated periodically as needed. More than 20,000 students have successfully learned ocean navigation from these materials and gone on to cross oceans or circumnavigate the globe. This book covers how to find position at sea from timed sextant sights of the sun, moon, stars, and planets plus other routine and special procedures of safe, efficient offshore navigation. No previous navigation experience is required. The only math involved is arithmetic (adding and subtracting angles and times). This is a practical, how-to-do-it book, which also includes clear explanations of how it works and how to do it well. Plus this book includes other crucial factors of ocean navigation besides just finding out where you are from the stars, such as logbook procedures, dead reckoning, error analysis, route planning, and more.

At the end of this book, you will be ready for ocean navigation. The book includes: text, practice problems, tables selections, detailed glossary, and full solutions. Printable work forms, plotting sheets, and other resources are available at no charge from www.starpath.com/celnavbook.

Our Fit-Slope Method presented in this textbook is cited in the latest (2017) edition of Bowditch:"The common method of averaging sights is the Fit-Slope Method, e.g. Burch, D. 2015, Celestial Navigation, Second Edition (Seattle, Starpath Publications) pp. 176-177."  —Bowditch, American Practical Navigator, NGA Pub 9. Section 1805.

Preface to the Second Edition:

We are pleased to say that after ten more years of using this text we do not find reason to change the basic approach and methods of the teaching. We still use most of the same examples, which are now quite old, but that is the beauty of celestial navigation. It has not changed, so we do not benefit in any way from making all new examples, which would bring with them more chance of error in a book of many numbers.

We have, however, notably improved and expanded the book. Each section has been updated and reformatted for a clearer presentation, often in response to student questions over the years. New graphics have been added and older ones all updated. There is much new content in the text, especially in the In-Depth chapter, including more detailed discussion of the sailings and more background on the principles. New sections were added on general ocean navigation and optimizing the fixes. We have also updated the electronic navigation section, as most ocean navigators will also be using other tools besides celestial.

Find Your Way at Sea, No Matter What

“Inherently interesting and fun to read . . . provides the clearest understanding of general navigation principles we've seen yet.”--BoatU.S.

“Thorough and authoritative.”--Sea Kayaker

“A definitive work of instant appeal to seamen of all levels of experience.”--The Navigation Foundation

Every sailor knows that instruments can fail. Things get wet, break, fall overboard. Whether you’re safe on your boat or drifting in a life raft, let David Burch show you how to find your way no matter what navigational equipment you have. Often relying on common materials like a small stick, a plastic bottle, even a pair of sunglasses, Burch explains how to make use of all available means--from the ancient skills of Polynesian navigators to the contrails of airliners overhead--to calculate speed, direction, latitude, and longitude and to perform all aspects of piloting and dead reckoning. Learn how to

Find Your Way at Sea, No Matter What

“Inherently interesting and fun to read . . . provides the clearest understanding of general navigation principles we''ve seen yet.”--BoatU.S.

“Thorough and authoritative.”--Sea Kayaker

“A definitive work of instant appeal to seamen of all levels of experience.”--The Navigation Foundation

Every sailor knows that instruments can fail. Things get wet, break, fall overboard. Whether you’re safe on your boat or drifting in a life raft, let David Burch show you how to find your way no matter what navigational equipment you have. Often relying on common materials like a small stick, a plastic bottle, even a pair of sunglasses, Burch explains how to make use of all available means--from the ancient skills of Polynesian navigators to the contrails of airliners overhead--to calculate speed, direction, latitude, and longitude and to perform all aspects of piloting and dead reckoning. Learn how to

Become an Expert Small-Craft Radar Operator

Nothing beats radar for guiding your boat through the darkest night or the thickest fog. Radar enables you to plot a fix from just a single buoy or landmark, and it is the only navigation tool that tells you not just where you are, but who else or what else is out there with you. Today's smaller, affordable, efficient radars make more sense than ever for sailors and powerboaters.

Adopted by the American Sailing Association for their radar course and used by professional and recreational radar training schools around the world, this complete, in-depth manual shows you how to:

"This book will turn you into an expert on small-craft radar operations. It covers everything--radar choice, installation, use, and how to interface with your electronics. Very comprehensive!" -- Boat Books

"Stands out among other books on the subject . . . an excellent introduction to radar." -- Power Cruising

"Radar is an electronic tool, the operation of which takes much more interpretation than any other--too little knowledge can be just as dangerous as none. Radar for Mariners helps you understand how radar works, explains its limitations, and shows you how to get the full use of radar's functions. This book should show up on the radar screen of anyone with radar--or contemplating getting one. I can't wait to go to my boat and stop playing with my radar and start using it." -- Good Old Boat

Become an Expert Small-Craft Radar Operator

Nothing beats radar for guiding your boat through the darkest night or the thickest fog. Radar enables you to plot a fix from just a single buoy or landmark, and it is the only navigation tool that tells you not just where you are, but who else or what else is out there with you. Today''s smaller, affordable, efficient radars make more sense than ever for sailors and powerboaters.

Adopted by the American Sailing Association for their radar course and used by professional and recreational radar training schools around the world, this complete, in-depth manual shows you how to:

"This book will turn you into an expert on small-craft radar operations. It covers everything--radar choice, installation, use, and how to interface with your electronics. Very comprehensive!" -- Boat Books

"Stands out among other books on the subject . . . an excellent introduction to radar." -- Power Cruising

"Radar is an electronic tool, the operation of which takes much more interpretation than any other--too little knowledge can be just as dangerous as none. Radar for Mariners helps you understand how radar works, explains its limitations, and shows you how to get the full use of radar''s functions. This book should show up on the radar screen of anyone with radar--or contemplating getting one. I can''t wait to go to my boat and stop playing with my radar and start using it." -- Good Old Boat

First published in 1999, this collection of papers represents the latest thinking on the effects of globalisation and agri-food restructuring from a regional and peripheral perspective. The book breaks new ground in our understanding of the relationship between the global, regional and local levels in the sphere of agri-food production. While Australia and New Zealand are important components of the agri-food system, the economic and political decisions which impact at the regional and local level are usually made elsewhere - often in the boardrooms of global companies and the political institutions of Europe and North America. At the same time, however, Australia and New Zealand have sought to establish some independent room for manoeuvre. In Australia this can be seen in the targeting of consumers in South East Asia, and New Zealand has experienced both sweeping deregulation and niche marketing of goods such as organic produce. The success or failure of these strategies cannot currently be determined, but this invaluable collection presents and discusses some possible future scenarios. Featuring 31 specialists in sociology, geography, social anthropology, veterinary science, environmental studies and sustainable development, it is a product of the Agri-Food Research Network. The volume includes 19 essays which attempt to conceptualise a series of global trends and their local ramifications, explore Australian and New Zealand experiences of agri-food restructuring in historic, ideological and discursive terms, and analyse local policy and politics and the influence on rural producers, along with studying four key concepts underpinning agri-food research and the possibilities for their application in new areas.

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First published in 1999, this collection of papers represents the latest thinking on the effects of globalisation and agri-food restructuring from a regional and peripheral perspective. The book breaks new ground in our understanding of the relationship between the global, regional and local levels in the sphere of agri-food production. While Australia and New Zealand are important components of the agri-food system, the economic and political decisions which impact at the regional and local level are usually made elsewhere - often in the boardrooms of global companies and the political institutions of Europe and North America. At the same time, however, Australia and New Zealand have sought to establish some independent room for manoeuvre. In Australia this can be seen in the targeting of consumers in South East Asia, and New Zealand has experienced both sweeping deregulation and niche marketing of goods such as organic produce. The success or failure of these strategies cannot currently be determined, but this invaluable collection presents and discusses some possible future scenarios. Featuring 31 specialists in sociology, geography, social anthropology, veterinary science, environmental studies and sustainable development, it is a product of the Agri-Food Research Network. The volume includes 19 essays which attempt to conceptualise a series of global trends and their local ramifications, explore Australian and New Zealand experiences of agri-food restructuring in historic, ideological and discursive terms, and analyse local policy and politics and the influence on rural producers, along with studying four key concepts underpinning agri-food research and the possibilities for their application in new areas.

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