Synonyms: dead reckoning
Definition: navigation without the aid of celestial observations
Similar words: pilotage, piloting, navigation
Definition: the guidance of ships or airplanes from place to place
Synonyms: dead reckoning, shot, guess, guessing, guesswork
Definition: an estimate based on little or no information
Similar words: idea, estimate, estimation, approximation
Definition: an approximate calculation of quantity or degree or worth
Usage: an estimate of what it would cost; a rough idea how long it would take