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The Lo-Tech Navigator


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Table of Contents

Introduction 1. Three compasses for the price of one 2. A sailing personality quiz 3. Gone with the wind - a handheld anemometer 4. Test your knowledge of the wind 5. A tide table holder 6. McGrath's revenge 7. A tide abacus 8. A fatal flaw 9. A handy sun compass 10. Rope trick 11. A drogue log 12. Singlehander--a protractor for knee top navigation 13. The magic of 6 degrees 14. Alcor--the mariner's eyesight test 15. Spice jar navigation lights 16. A ready-made heliograph 17. A weekend sailor's logbook 18. Four moorings and a fiasco 19. Threefold puzzle 20.A hand leadline 21. Reading the sea 22. Self-steering 23. 1912 24. Sun navigation in a nutshell 25. A mariner's quadrant 26. The cross-staff 27. A hi-tech back-staff 28. Henry the octant 29. Dire straits navigation 30. The moon as your compass 31. Survive! 32. Killorain's treasure island 33. A seafarer's sundial 34. Latitude and longitude by compass 35. Where the sky is blue 36. The longitude game 37. Polarum 38. A trick with Kochab 39. I want to be Captain 40. Steering by the stars 41. Plumb-line navigation Appendix 1. Tide abacus scale Appendix 2. Almanac data for use with sundial Appendix 3. Vernier scales Appendix 4. GHA Aries without an almanac References

About the Author

Tony Crowley, a former merchant navy officer, learned to sail as a boy in Egypt using an abandoned seaplane float. He is the author of The Sailing Quiz Book and various magazine and journal articles, in Britain and the USA, on emergency and traditional navigation.


In an age when Global Positioning Systems, fluxgate compasses, radar and sonar depth sounders can interface with laptop computers, Tony Crowley's The Lo-Tech Navigator is a refreshing return to basics. Without oversimplifying, this book explains the principles behind how navigational instruments work. Readers learn how to construct equipment as simple as a compass using a dish of water and a tin can lid, or as complex as a working octant. The book explains sun navigation and the tools used to practice it. Would you believe an empty audiocassette case can function as your sextant or that you can use your finders to determine the exact points of a compass? Also included are interesting stories and quizzes that test your knowledge of boating, sailing and navigation. Filled with practical knowledge and ingenuity, The Lo-Tech Navigator is a great book to have in your ship's library. * The Ensign *
The Lo-Tech Navigator is a straightforward and practical guide to navigating at sea without the use of modern computers and advanced navigational devices. Such devices are useful, but sometimes they fail; and sometimes sailors can't afford such roots to begin with. The Lo-Tech Navigator discusses how to build and use simple compasses, sextants, and other simple tools that can cultivate navigational skills while saving hundreds of dollars. The basic mathematical formulas for calculating such things as longitude are described with examples. Color photographs and poetry related to seafaring sprinkle amid this superb resource, recommended for all sea voyagers - it's always good to back up one's aids and gadgets with good old-fashioned knowledge. * Library Bookwatch *

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