The process of calculating one’s position, especially at sea, by estimating the direction and distance travelled rather than by using landmarks or astronomical observations.
- In dead reckoning you estimate distance traveled along a given heading as a function of velocity and elapsed time.
- It was the Greeks who pioneered modern methods of navigating by calculation rather than by dead reckoning.
- At first, crews had to rely on dead reckoning - estimating position by speed, flying time and compass.
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