sensitive compass

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• Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …   Wikipedia

• mariner's compass — noun compass in the form of a card that rotates so that 0 degrees or North points to magnetic north • Syn: ↑compass card • Hypernyms: ↑magnetic compass * * * noun : a compass used in navigation consisting of two or more parallel magnetic needles… …   Useful english dictionary

• Inclinometer — Compass with inclinometer Military model An inclino …   Wikipedia

• Galvanometer — D Arsonval/Weston galvanometer movement with the moving coil shown in red. A galvanometer is a type of ammeter: an instrument for detecting and measuring electric current. It is an analog electromechanical transducer that produces a rotary… …   Wikipedia

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• Magnetometer — A magnetometer is a measuring instrument used to measure the strength or direction of a magnetic field either produced in the laboratory or existing in nature. Some countries such as the USA, Canada and Australia classify the more sensitive… …   Wikipedia

• Magnetoception — (or magnetoreception) is the ability to detect a magnetic field to perceive direction, altitude or location. This sense plays a role in the navigational abilities of several animal species and has been postulated as a method for animals to… …   Wikipedia

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• History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …   Wikipedia

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