| 单词 |
dead reckoning |
| 释义 |
dead reckoning Naut. and Aeronaut.
[dead a. V.]
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 (q.v.), that computed by dead reckoning.
1613M. Ridley Magn. Bodies 147 Keeping a true, not a dead reckoning of his course. 1760Pemberton in Phil. Trans. LI. 911 The latitude exhibited by the dead reckoning of the ship. 1840R. H. Dana Bef. Mast xxxii. 124 We had drifted too much to allow of our dead reckoning being anywhere near the mark. 1891Nature 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. 1917Bosanquet & Campbell Navigation 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. Ibid. 5 These data enable us to find a Dead Reckoning position. 1935C. G. Burge Compl. Bk. Aviation 477/1 Dead reckoning..is a compromise between pilotage and navigation.
fig.1868Lowell Witchcraft Prose Wks. 1890 II. 372 The mind, when it sails by dead reckoning..will sometimes bring up in strange latitudes. |
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