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dead reckoning

Definitions of dead reckoning
  1. noun
    navigation without the aid of celestial observations
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    type of:
    navigation, pilotage, piloting
    the guidance of ships or airplanes from place to place
  2. noun
    an estimate based on little or no information
    synonyms: guess, guessing, guesswork, shot
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    type of:
    approximation, estimate, estimation, idea
    an approximate calculation of quantity or degree or worth
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