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Compasses in Small Craft, 3rd Edition Revised 1983

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By Cdr. C.A. Lund
ISBN:978-0-85174-453-7
Published date:First published 1948-3rd edition revised 1983

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Compasses in Small Craft By Cdr. C.A. Lund

Written to enable the owner or skipper of a small vessel to ascertain the deviation of his compass and correct it. Principal causes of deviation are described. Methods shown are simple and have been used by the author in correcting the compasses of small craft up to 70 tons. Correction of a compass in a large steel vessel is a more complicated business, and needs the services of a professional Compass Adjuster.

CHAPTER CONTENTS:
• Description of a Liquid Compass
• Removing a Bubble
• Taking a Bearing
• Pelorus
• Earth's Magnetism, Lines of Force, etc.
• Permanent Magnetism
• How Deviation is Caused, etc.
• Induced Magnetism
• Quadrantal Correction Heeling Error, etc.
• Precautions before Swinging Ship
• Swinging Ship
• Finding Deviation Under Weigh, etc.
• Correcting the Compass Finding Positions by Two Horizontal Angles, etc.
• Deviation by the Sun
• Amplitude.

This book is also of value to yachting men.

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