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Dead reckoning

noun

Definitions

Noun
  1. 1
    A method of estimating the position of a ship or aircraft by applying estimates of the distance and direction travelled from 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 countable, uncountable
  2. 2
    navigation without the aid of celestial observations wordnet
  3. 3
    an estimate based on little or no information wordnet

Etymology

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

See also for "dead reckoning"

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