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Though contemporary sailors generally use electronic systems to orient themselves, the sextant is far from redundant. This purest of all nautical instruments, which allows seafarers to accurately determine their global position alone and without the aid of modern technology, is still required equipment on all commercial trading vessels; should electronic systems fail, a sextant can make the difference between disaster and survival.
In this invaluable tutorial for beginning navigators, Dag Pike clearly and efficiently explains the care and use of this ingenious tool which so many generations of seamen and airmen have relied upon and treasured.
Содержание
Introduction
Chapter One
Description of the Sextant
Chapter Two
The Principle of the Sextant
Chapter Three
How to Take Sights
Chapter Four
Practical Hints on Taking Sights
Chapter Five
How to Read the Sextant
Chapter Six
Errors and Adjustments
Chapter Seven
Sextant Telescopes and Other Accessories
Chapter Eight
Practical Notes on the Care of the Sextant
Chapter Nine
The Sextant and Coastal Navigation
Index