dead reckoningdead reckoning
Origin of dead reckoning; from ded. reckoning, abbreviation, abbreviated of deduced reckoning
- 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 of dead reckoningPossibly alteration of ded., abbr. of deduced, from deduce, to trace from the beginning; see deduce.