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Compass Reference library
The Oxford Companion to World Exploration
... . See Compass, Magnetic and Navigational Techniques...
Compass Reference library
Brewer's Dictionary of Phrase & Fable (19 ed.)
... Box the compass, To See under box . Goat and Compasses See under goat . Mariner’s compass See under mariner...
compass Quick reference
The Concise Oxford Dictionary of Mathematics (6 ed.)
...compass A compass, or pair of compasses, is a hinged drawing instrument used for drawing circles or arcs of circles. See ruler and compass construction...
compass Quick reference
The Oxford Companion to Ships and the Sea (2 ed.)
... , in present parlance the instrument by means of which a ship may be steered on a course and by means of which bearings may be taken to fix the ship's position on the chart . For the different types of maritime compasses see azimuth compass ; gyroscopic compass ; hand-bearing compass ; magnetic compass . See also viking compass...
compass Quick reference
A Dictionary of Construction, Surveying and Civil Engineering (2 ed.)
... ( magnetic compass ) A device that has a magnetized pointer, which swings to always point to Magnetic North. Used as a navigational aid or in surveys such as a compass traverse , where horizontal angles are determined by magnetic bearings...
compass Reference library
The Oxford Companion to Music
...compass (Fr.: étendue ; Ger.: Umfang ). The range of pitches obtainable from an instrument or...
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A Dictionary of Travel and Tourism
... Device for determining direction; a magnetic compass uses the earth’s magnetic field—a magnetized bar or needle aligning itself along the north–south...
compass Reference library
The Oxford Dictionary of the Renaissance
... . The simplest form of compass was a magnetized needle lodged in a straw or piece of cork and floating in a basin of water. From the twelfth century compass needles were placed on a pivot above a card on which the compass points were marked. In the late fifteenth century mariners discovered that the compass needle did not point to true astronomical north. The problem of compensating for varying magnetic declination was addressed with the azimuth compass, which was first described in 1514 in João de Lisboa's Livro de Marinharia ; the azimuth compass...
compass Quick reference
A Dictionary of Physics (8 ed.)
...compass A small magnet pivoted at its central point to revolve in a horizontal plane. In the earth’s magnetic field the magnet (called the compass needle) aligns itself so that its north-seeking end points to the earth’s magnetic north pole. A scale (called a compass card) is placed below the needle for use in navigation. In some navigation compasses the entire card is pivoted, indicating direction by a fixed mark on the casing. Such compasses are often filled with alcohol to provide damping. Magnetic compasses suffer from being affected by magnetic metals...
compass Quick reference
World Encyclopedia
... Direction-finding instrument also used to show direction of a magnetic field . It is a horizontal magnetic needle on a vertical pivot whose north-seeking end can turn to point towards the Earth's magnetic n . Adjustments can be made to give true n . The compass has been used in Europe since the 12th century when the ‘needle’ was a piece of lodestone. A compass, however, can give an incorrect reading if magnetic metals are nearby. In navigation today, the magnetic compass is often replaced by the motor-driven gyrocompass...
Compass Reference library
The Oxford Companion to Australian Literature (2 ed.)
... , the journal of the Melbourne University literature club, was published irregularly 1956–63 . Originally intended as a workshop journal publishing experimental undergraduate creative writing, Compass included among its early contributors now-established figures such as Chris Wallace-Crabbe and Bruce Dawe . Among its editors have been the poets Wallace-Crabbe , Clive Faust and Andrew Taylor...
compass Quick reference
The Oxford Dictionary of Music (6 ed.)
... The range of a v. or instr from the highest to the lowest note obtainable; or the extreme limit of the notes obtainable. The usual classification of vv. according to compass takes account of 6 ranges, with their distinctive qualities, the average vv. in these ranges having the following compasses: soprano c′–c‴ mezzo‐soprano b–b″ contralto g–g″ (male alto a note or two less) tenor c–c″ baritone A–F♯ Bass...
Compass Reference library
Petra G. Schmidl
The Oxford Encyclopedia of Philosophy, Science, and Technology in Islam
... Summary. The premodern Islamic sources on the magnetic compass suggest that the floating compass presents an earlier stage than the dry compass, although there are only about fifty years between their first descriptions. Similarly, it appears that the application of the magnetic compass in navigation antedates its use in religion, a specifically Islamic use of magnetic directive power—although the earliest reference to a dry compass concerns a qiblah indicator and not a nautical compass. Bibliography King, David A. World Maps for Finding the Direction...
compass Quick reference
A Dictionary of Animal Behaviour (2 ed.)
... An aspect of orientation, denoting the ability to head in a particular compass direction, without reference to landmarks. Animals are known to possess compasses of various types. These are based upon features of the geophysical environment, including the magnetic field of the Earth, the pattern of stars, the position of the sun, and the pattern of polarization of sunlight. These compasses are often used in conjunction with the animal's * biological clock , thus enabling compensation for the passage of time. Such time-compensated compasses play an...
compass orientation Quick reference
A Dictionary of Zoology (5 ed.)
... orientation The ability to head in a particular compass direction without reference to...
compass point Quick reference
A Dictionary of Weights, Measures, and Units
... point plane angle . 1 / 32 revolution (= , 11° 15′); see point...
compass points Quick reference
A Dictionary of Travel and Tourism
... points 1. Specific compass bearings, e.g. north-east. 2. Also name of UK frequent traveller programme promoted by Stena...
compass error Quick reference
The Oxford Companion to Ships and the Sea (2 ed.)
... error , the amount by which the magnetic compass direction differs from the true direction, the sum of variation and deviation . It is named east or west according to whether the compass points to the right or left of the true direction. Compass error with westerly (above) and easterly (below)...
Compass Berg (Eastern Cape/South Africa) Quick reference
Concise Oxford Dictionary of World Place Names (6 ed.)
...Compass Berg , Eastern Cape/South Africa A mountain from Berg and so-called in 1778 because it has a wonderful view from the summit over all points of the compass...
