Method of estimating ship's or plane's location

Wikipedia Word definitions in Wikipedia
Dead Reckoning was a 1990 television film , directed by Robert Michael Lewis, starring Cliff Robertson , Rick Springfield , and Susan Blakely . The film score was composed by Mark Snow . The film was featured on USA Up All Night .

Wiktionary Word definitions in Wiktionary
n. A method of estimating the position of a ship or aircraft by applying estimates of the distance and direction travelled to a previously known position. In respect to ships/boats, it excludes the effect of wind and current on the vessel. Compare with ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"ascertaining the position of a ship by measurement of the distance run," 1610s, might be from nautical abbreviation ded. ("deduced") in log books, but it also fits dead (adj.) in the sense of "unrelieved, absolute."

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Most of our navigation was pure pilotage and dead reckoning over unfamiliar, sometimes hostile territory and some very bad weather.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Reckoning \Reck"on*ing\, n. The act of one who reckons, counts, or computes; the result of reckoning or counting; calculation. Specifically: An account of time. --Sandys. Adjustment of claims and accounts; settlement of obligations, liabilities, etc. Even ...