Emergency Navigation, 2nd Edition: Improvised and No-Instrument Methods for the Prudent Mariner

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McGraw Hill Professional, May 14, 2008 - Sports & Recreation - 288 pages

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

  • Steer by sun, stars, wind, and swells
  • Estimate current and leeway
  • Improvise your own knotmeter or plumb-bob sextant
  • Find the sun in a fogbank
  • Estimate latitude with a plate and a knotted string
  • And more vital information

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Chapter 1 Introduction
Chapter 2 Time and Place at Sea
Chapter 3 Directions at Sea
Chapter 4 Steering by Wind and Swells
Chapter 5 Steering by the Stars
Chapter 6 Steering by the Sun
Chapter 7 Steering by Other Things in the Sky
Chapter 8 Steering in Fog or Under Cloudy Skies
Chapter 10 Dead Reckoning
Chapter 11 Latitude at Sea
Chapter 12 Longitude at Sea
Chapter 13 Coastal Piloting without Instruments
Chapter 14 What to Do with What Youve Got
Annotated Bibliography

Chapter 9 Currents

Common terms and phrases

Popular passages

Page 123 - ... is clockwise in the Northern Hemisphere and counterclock-wise in the Southern Hemisphere.
Page 3 - However, as primary government agencies that produce and distribute geospatial data and information, the National GeospatialIntelligence Agency (NGA, formerly the National Imagery and Mapping Agency...
Page 257 - OII 8875 7 4 25.00 UK Air Almanac for the Year 2004 This annual volume contains data for the times of rising and setting of the Sun and Moon, as well as the twilight times for latitudes between N72 degrees and S60 degrees.
Page 129 - These winds are generally from the north in the summer and from the south in the winter.
Page 186 - ... divided into 24 hours with each arc further divided into minutes and seconds of time. When an arc is so divided time units may be used as a measure of arc. Useful equivalents of identical arcs measured in degrees and minutes of arc or by units of time may be expressed in these ways: 360 = 24 hours 15 = 1 hour 1 ~ 4 minutes 15' = 1 minute 1' = 4 seconds MEASURED by the MEAN SUN I9398.W.MIXTER Fia.
Page 238 - This concept is inherently different now than it was at the time of the first edition of this book.
Page 8 - ... to the plane of its orbit around the sun. Because of this tilt, the...
Page 73 - The precise direction of sunrise depends on your latitude and the time of year. During fall and winter...
Page 257 - Each volume contains lights and other aids to navigation that are maintained by or under the authority of foreign governments.
Page 44 - Southern stars always rise south of due east and set south of due west, and northern stars always rise north of due east and set north of due west (see Figure 5-4).

About the author (2008)

David Burch is a renowned expert on navigation with several successful titles and a high profile in the boating community. The founder and director of the Starpath School of Navigation, Burch holds a Ph.D. in physics and has more than 60,000 miles of ocean sailing experience.

Bibliographic information