dead reckoning

EnglishEdit

 
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EtymologyEdit

Uncertain. Not short for deduced or deductive, but this belief explains the alternative spelling ded reckoning (which actually originated centuries later).

NounEdit

dead reckoning (countable and uncountable, plural dead reckonings)

  1. A method of estimating the position of a ship or aircraft by applying estimates of the distance and direction travelled to a previously known position. In respect to ships/boats, it excludes the effect of wind and current on the vessel. Compare with estimated position. Abbreviation: DR

TranslationsEdit