Today travellers by land, sea and air take accurate navigation for
granted but it was not always thus. The author, a highly
experienced sailor, sets out to record the development of
navigational techniques from the earliest time, five millenniums
ago. As explorers started to venture offshore into the unknown they
had to rely on the sun and stars for direction. From this pioneers
turned to mathematics, astrolobes, sextants and increasing accurate
clocks to measure latitude and later longitude. More recently major
breakthroughs with electronic navigation, GPS and other satellite
systems have revolutionised travel. Focusing primarily but not
exclusively on marine navigation, the author weaves a fascinating
course through the successes and failures of mankind's quest to
explore his world. The result is a thoroughly entertaining and
informative work which has no rival.
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