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2019
Discover the surprising connection between timekeeping and determining one's location. This book, a companion to the National Air and Space Museum exhibition, traces the history of navigation from early methods to modern technology. It explores how ancient observers used celestial changes and how mariners like the Vikings navigated without clocks. The evolution continued through the Age of Exploration with dead reckoning and celestial navigation, refined by instruments like sextants and marine chronometers.