9 Grammatical Pitfalls

dead reckoning

noun, Navigation
calculation of one's position on the basis of distance run on various headings since the last precisely observed position, with as accurate allowance as possible being made for wind, currents, compass errors, etc.
one's position as so calculated.
Origin of dead reckoning


[ded-rek-uh n] /ˈdɛdˈrɛk ən/
verb (used with object), Navigation
to calculate (one's position) by means of dead reckoning.
by back formation
Related forms
dead-reckoner, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dead reckoning
  • His dead reckoning with his scope is pretty impressive.
  • The crew had navigated solely on dead reckoning for the past three days because of persistent fog.
  • Most autonomous systems use dead reckoning to track the distance and angles traveled.
  • Navigation was by dead reckoning and solar observations.
  • The actual platform uses dead reckoning and wall locations to identify its location in the characterization area.
British Dictionary definitions for dead reckoning

dead reckoning

a method of establishing one's position using the distance and direction travelled rather than astronomical observations
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for dead reckoning

might be from nautical abbreviation ded. ("deduced") in log books, but it also fits dead (adj.) in the sense of "unrelieved, absolute."

Online Etymology Dictionary, © 2010 Douglas Harper
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