dead reckoningn.

Etymology: dead adj. V.

Nautical and Aeronautics.

The estimation of a ship's position from the distance run by the log and the courses steered by the compass, with corrections for current, leeway, etc., but without astronomical observations. Hence dead latitude n., that computed by dead reckoning.

ΘΚΠ

society > travel > travel by water > directing or managing a ship > [noun] > position > reckoning

reckoning1595

dead reckoning1613

1613 M. Ridley Short Treat. Magneticall Bodies 147 Keeping a true, not a dead reckoning of his course.

1761 H. Pemberton in Philos. Trans. 1760 (Royal Soc.) 51 911 The latitude exhibited by the dead reckoning of the ship.

1840 R. H. Dana Two Years before Mast xxxii. 124 We had drifted too much to allow of our dead reckoning being anywhere near the mark.

1891 Nature 3 Sept. The log, which for the first time enabled the mariner to carry out his dead-reckoning with confidence, is first described in Bourne's ‘Regiment for the Sea’, which was published in 1577.

1917 H. T. A. Bosanquet & G. R. C. Campbell Navig. for Aerial Navigators i. 4 In aerial navigation..Dead Reckoning is the position arrived at as calculated from the estimated track and the estimated speed made good over the ground.

1917 H. T. A. Bosanquet & G. R. C. Campbell Navig. for Aerial Navigators i. 5 These data enable us to find a Dead Reckoning position.

1935 C. G. Burge Compl. Bk. Aviation 477/1 Dead reckoning..is a compromise between pilotage and navigation.

figurative.1868 J. R. Lowell Witchcraft in Prose Wks. (1890) II. 372 The mind, when it sails by dead reckoning..will sometimes bring up in strange latitudes.

This entry has not yet been fully updated (first published 1894; most recently modified version published online December 2019).

单词	dead reckoning
释义	dead reckoningn. Etymology: dead adj. V. Nautical and Aeronautics. The estimation of a ship's position from the distance run by the log and the courses steered by the compass, with corrections for current, leeway, etc., but without astronomical observations. Hence dead latitude n., that computed by dead reckoning. ΘΚΠ society > travel > travel by water > directing or managing a ship > [noun] > position > reckoning reckoning1595 dead reckoning1613 1613 M. Ridley Short Treat. Magneticall Bodies 147 Keeping a true, not a dead reckoning of his course. 1761 H. Pemberton in Philos. Trans. 1760 (Royal Soc.) 51 911 The latitude exhibited by the dead reckoning of the ship. 1840 R. H. Dana Two Years before Mast xxxii. 124 We had drifted too much to allow of our dead reckoning being anywhere near the mark. 1891 Nature 3 Sept. The log, which for the first time enabled the mariner to carry out his dead-reckoning with confidence, is first described in Bourne's ‘Regiment for the Sea’, which was published in 1577. 1917 H. T. A. Bosanquet & G. R. C. Campbell Navig. for Aerial Navigators i. 4 In aerial navigation..Dead Reckoning is the position arrived at as calculated from the estimated track and the estimated speed made good over the ground. 1917 H. T. A. Bosanquet & G. R. C. Campbell Navig. for Aerial Navigators i. 5 These data enable us to find a Dead Reckoning position. 1935 C. G. Burge Compl. Bk. Aviation 477/1 Dead reckoning..is a compromise between pilotage and navigation. figurative.1868 J. R. Lowell Witchcraft in Prose Wks. (1890) II. 372 The mind, when it sails by dead reckoning..will sometimes bring up in strange latitudes. This entry has not yet been fully updated (first published 1894; most recently modified version published online December 2019). < n.1613
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