Emergency Navigation: Improvised and No-Instrument Methods for the Prudent Mariner [Lingua inglese] - Brossura

Burch, David

Brossura

ISBN 10: 0071481842 ISBN 13: 9780071481847

Casa editrice: International Marine/Ragged Mountain Press, 2008

Riassunto

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

Su questo libro

L'autore

David Burch, the director of the Starpath School of Navigation in Seattle, Washington, has been teaching navigation and seamanship since 1977. He has logged more than 60,000 sea miles, including three wins in the trans-Pacific Victoria to Maui yacht race. He is the author of nine books on marine navigation, including Emergency Navigation (International Marine, 1984), and his magazine articles have appeared in Cruising World, Ocean Navigator, Sailing, and Sea Kayaker. He holds a U.S. Coast Guard Master's license (100 tons). He is also a past Fulbright Scholar and holds a PhD in physics. HOMETOWN: Seattle, WA

Contenuti

List of Figures and Tables

Foreword to the First Edition

Preface to the Second Edition

Acknowledgments

Chapter 1. Introduction

What Is Emergency Navigation?

The Scope of This Book

Preparation for Navigational Emergencies

Chapter 2. Time and Place at Sea

Latitude Regions and Seasons Defined

Time in Navigation

Finding Position versus Keeping Track of Position

Chapter 3. Directions at Sea

Choosing a Route

Compass Checks

Steering without a Compass

Chapter 4. Steering by Wind and Swells

Reading the Wind

Swells, Waves, and Ripples

Wind Shifts

Chapter 5. Steering by the Stars

Know the Whole Sky

How the Stars Move

Steering by the North Star

The Summer Triangle

The Great Square of Pegasus

Finding North without the North Star

Steering by Orion

Steering by Gemini and Procyon

Steering by Scorpio

Steering by the Southern Cross and the South Pole

Steering by Overhead Stars

Steering by Zenith Stars

Star Paths

Timing Low Stars

Chapter 6. Steering by the Sun

Sunrise and Sunset

Morning Sun and Afternoon Sun

Local Apparent Noon

Solar Time Method

The Shadow-Tip Method

The Tropics Rule for the Sun

Sun Crossing Due East or West

Sun Compasses

When the Sun Is Obscured

Chapter 7. Steering by Other Things in the Sky

The Moon

The Planets

Clouds, Birds, and Planes

Satellites

Chapter 8. Steering in Fog or Under Cloudy Skies

How to Make a Magnetic Compass

Direction Finding with a Portable Radio

Streaming a Line along the Centerline

Finding the Sun as a Viking Would

Chapter 9. Currents

Ocean Currents

Tidal Currents

Wind-Driven Currents

Coastal Currents

Chapter 10. Dead Reckoning

Emergency DR

Finding Boat Speed

DR Errors from Speed and Direction

DR Errors from Current and Leeway

Progress to Weather

Chapter 11. Latitude at Sea

Makeshift Altitude Measurements and Calibrations

Makeshift Altitude Corrections

Latitude from Polaris

Latitude from Zenith Stars

Latitude from Horizon-Grazing Stars

Latitude from Double Transits of Circumpolar Stars

Latitude from the Sun at LAN

Latitude from the Length of Day

Keeping Track of Latitude

Chapter 12. Longitude at Sea

Longitude from Sunrise or Sunset

Longitude from LAN (the Equation of Time)

Finding UTC from a Known Position

Keeping Track of Longitude

Chapter 13. Coastal Piloting without Instruments

Signs of Land at Sea

Visible Range of Lights and Land

Distance Off

Running Fix from Radio Bearings

Course Made Good in Current

Chapter 14. What to Do with What You’ve Got

Routine Navigation with Everything

Position by Radio Contact

Everything but UTC

Everything but a Sextant

Everything but Sight Reduction Tables

Everything but a Compass

Everything but an Almanac

Nothing but UTC

Annotated Bibliography

Basic Marine Navigation

Almanac Data

Stars and Star Identification

Finding Longitude without Time

No-Instrument Navigation

Emergency Seamanship

Periodicals of Interest to Emergency Navigation

Meteorology and Oceanography

Published Aids to Navigation

Index

Su questa edizione

• Editore: International Marine/Ragged Mountain Press
• Data di pubblicazione: 2008
• ISBN 10: 0071481842
• ISBN 13: 9780071481847
• Rilegatura: Copertina flessibile
• Numero edizione: 2
• Numero di pagine: 288