dead reckoning

2 ENTRIES FOUND:

dead reckoning

noun

Definition of DEAD RECKONING

1
:  the determination without the aid of celestial observations of the position of a ship or aircraft from the record of the courses sailed or flown, the distance made, and the known or estimated drift
2
:  guesswork
dead reckon verb

First Known Use of DEAD RECKONING

1613

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