If navigating by gyrocompass, the reference direction is true north, in which case the terms true bearing and geodetic bearing are used. In stellar navigation, the reference direction is that of the North Star, Polaris. Generalizing this to two angular dimensions, a bearing is the combination of antenna azimuth and elevation required to point (aim) an antenna in a given direction. The bearing for geostationary satellites is constant. The bearing for polar-orbiting satellites varies continuously.
Moving from A to B along a great circle can be considered as always going in the same direction (the direction of B), but not in the sense of keeping the same bearing, which applies when following a rhumb line. Accordingly, the direction at A of B, expressed as a bearing, is not in general the opposite of the direction at B of A (when traveling on the great circle formed by A and B). For example, assume A and B in the northern hemisphere have the same latitude, and at A the direction to B is eastnortheast. Then going from A to B, one arrives at B with the direction eastsoutheast, and conversely, the direction at B of A is westnorthwest.
Bearings can also be trasmited in to NNE-North North East NNNE-North North North east and ENNE-East North North East.
Other articles related to "usage":
... meanings, it has also acquired "a widespread current usage" amongst young people, as a general term of disparagement ... This pejorative usage has its origins in the late 1970s ... Beginning in the 1980s and especially in the late 1990s, the usage as a generic insult became common among young people ...
... For Wikipedia's own standards for hyphen usage, see WikipediaManual of Style#Hyphens Hyphens are mostly used to break single words into parts, or to join ordinarily separate words into single words ... does not exist rather, different manuals of style prescribe different usage guidelines ...
... which helped to popularise the "U", or upper-class, and "non-U" classification of linguistic usage and behaviour (see U and non-U English) — although this is something she saw as a tease and she certainly never took ... her as the snobbish inventor and main preserver of this usage ... the phrase, as an example of upper-class linguistic usage ...
... In older Javanese usage and in modern Balinese usage, gong is used to identify an ensemble of instruments ... In contemporary central Javanese usage, the term gamelan is preferred and the term gong is reserved for the gong ageng, the largest instrument of the type, or for surrogate instruments such ... In Balinese usage, gong refers to Gamelan Gong Kebyar ...
... "The first person we know of who made usage refer to language was Daniel Defoe, at the end of the seventeenth century" ...
Famous quotes containing the word usage:
“Girls who put out are tramps. Girls who dont are ladies. This is, however, a rather archaic usage of the word. Should one of you boys happen upon a girl who doesnt put out, do not jump to the conclusion that you have found a lady. What you have probably found is a lesbian.”
—Fran Lebowitz (b. 1951)
“...Often the accurate answer to a usage question begins, It depends. And what it depends on most often is where you are, who you are, who your listeners or readers are, and what your purpose in speaking or writing is.”
—Kenneth G. Wilson (b. 1923)
“Pythagoras, Locke, Socratesbut pages
Might be filled up, as vainly as before,
With the sad usage of all sorts of sages,
Who in his life-time, each was deemed a bore!
The loftiest minds outrun their tardy ages.”
—George Gordon Noel Byron (17881824)