Dead Reckoning: Memories of the 1971 Bangladesh War is a controversial book on the Bangladesh Liberation War written by Sarmila Bose.
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Before the 18th-century development of the marine chronometer by John Harrison and the lunar distance method, dead reckoning was the primary method of determining longitude available to mariners such as Christopher Columbus and John Cabot on their trans-Atlantic voyages.
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On May 21, 1927 Charles Lindbergh landed in Paris, France after a successful non-stop flight from the United States in the single-engined Spirit of St. Louis.
Much of Ramsayer's research on navigation concerned dead reckoning, automatic navigation maps based on Doppler radar, and improvements in astro navigation.