magnetic compass
101magnetic pole — noun 1. either of two points where the lines of force of the Earth s magnetic field are vertical • Hypernyms: ↑geographic point, ↑geographical point 2. one of the two ends of a magnet where the magnetism seems to be concentrated • Syn: ↑pole •… …
102compass deviation card — a card, sheet, or the like, with two compass roses printed on it concentrically, for recording, on a given voyage, the amount of deviation for which the navigator must compensate in using the ship s compass to steer a magnetic course. * * * …
103compass deviation card — a card, sheet, or the like, with two compass roses printed on it concentrically, for recording, on a given voyage, the amount of deviation for which the navigator must compensate in using the ship s compass to steer a magnetic course …
104magnetic bearing — The direction of an object from a point, expressed as a horizontal angle, measured clockwise from magnetic north. It is the compass bearing corrected for deviation. See also magnetic azimuth. See bearing (i) …
105compass course — Naut. a course whose bearing is relative to the meridian as given by the navigator s compass, no compensation being made for variation or deviation. Cf. true course, magnetic course. [1850 55] * * * …
106compass north — Navig. magnetic north, as indicated on a particular compass at a given moment. * * * …
107compass rose — 1. Navig. a circle divided into 32 points or 360° numbered clockwise from true or magnetic north, printed on a chart or the like as a means of determining the course of a vessel or aircraft. 2. a similar design, often ornamented, used on maps to… …
108compass needle — noun A magnetized pointer (usually marked on the North end) within a compass, free to align itself with the Earths magnetic field …
109compass — [13] The notion underlying compass is of ‘measuring out with paces’. It originated as a verb, Vulgar Latin *compassāre ‘pace out’, a compound formed from the Latin intensive prefix com and passus (source of English pace). This passed into Old… …
110compass error — incorrect instruction regarding the exact direction of the magnetic north caused by a malfunction of the compass …
