| 释义 |
dead reckoning
dead reckoningn.1. A method of estimating the position of a vehicle such as an aircraft or a ship based on its previous position and its course and speed over a known interval of time.2. Predictive calculation based on inference; guesswork.
[Possibly alteration of ded., abbr. of deduced, from deduce, to trace from the beginning; see deduce.]dead reckoning n (Navigation) a method of establishing one's position using the distance and direction travelled rather than astronomical observations dead′ reck′oning
n. Navig. calculation of one's position on the basis of compass readings, speed, and distance run from a known point, with allowances for drift from wind, currents, etc. [1605–15] dead′-reck′on, v.t. dead′-reck′on•er, n. dead reckoning - A calculation based on guesswork.See also related terms for reckoning.Thesaurus| Noun | 1. |  dead reckoning - an estimate based on little or no informationguessing, guesswork, guess, shotapproximation, estimate, estimation, idea - an approximate calculation of quantity or degree or worth; "an estimate of what it would cost"; "a rough idea how long it would take" | | 2. | dead reckoning - navigation without the aid of celestial observationsnavigation, pilotage, piloting - the guidance of ships or airplanes from place to place |
dead reckoning
dead reckoning: see navigationnavigation,
science and technology of finding the position and directing the course of vessels and aircraft. Early Navigational Techniques
In ancient times, mariners navigated by the guidance of the sun and stars and landmarks along the coast.
..... Click the link for more information. .Dead Reckoning the continuous calculation of the elements of a vessel’s course, such as speed and direction, and the effects of external forces in order to determine the vessel’s coordinates without observation of orientation points on shore or of heavenly bodies. The accuracy of dead reckoning is sufficient for keeping a vessel on the course set and for ensuring navigational safety. The quantities used are the ship’s heading and speed and the drift vector. When dead reckoning is performed on a map, the true course, distances traveled, and the ship’s turning trajectory and drift are calculated and plotted. The use of automatic position plotters in such dead reckoning permits continuous calculation of the vessel’s position; when dead reckoning is done by hand, positions are calculated sequentially at discrete time intervals. Analytic techniques for dead reckoning require the use of calculators. dead reckoning[¦ded ′rek·ən·iŋ] (navigation) Determination of position of a craft by advancing a previous position to a new one on the basis of assumed distance and direction traveled. dead reckoning (DR) In navigation, determination of position by advancing a previous known position using courses and distances. This navigational technique employs direct computation, using the triangle of velocities, from which the ground speed can be calculated and the course to steer can be determined. It is also a method of finding one's position by means of a compass and calculations based on speed, time elapsed, effects of wind, and direction from a known position.dead reckoning a method of establishing one's position using the distance and direction travelled rather than astronomical observations LegalSeenavigationSee DREK
See DREKdead reckoning
Synonyms for dead reckoningnoun an estimate based on little or no informationSynonyms- guessing
- guesswork
- guess
- shot
Related Words- approximation
- estimate
- estimation
- idea
noun navigation without the aid of celestial observationsRelated Words- navigation
- pilotage
- piloting
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