dead reckoning definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the finding of a ship's position by an estimate based on data recorded in the log, as speed and the time spent on a certain course, rather than by more precise means, as astronomical observations or Loran
dead reckoning definition by American Heritage Dictionary
- A method of estimating the position of an aircraft or a ship without astronomical observations, as by applying to a previously determined position the course and distance traveled since.
- Predictive calculation based on inference; guesswork.
Origin: Possibly alteration of ded., abbr. of deduced, from deduce, to trace from the beginning; see deduce.