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Electromagnetic log information


An Electromagnetic Log, sometimes called an "EM log", is an electronic sensor which measures the speed of a vessel through sea water. Like many other technologies, its name derives from the traditional chip log. It makes use of Faraday's law of induction by measuring the EMF induced in water moving through a magnetic field generated by the sensor.

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Electromagnetic log

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An Electromagnetic Log, sometimes called an "EM log", is an electronic sensor which measures the speed of a vessel through sea water. Like many other technologies...

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Chip log

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Most commonly used however (especially on merchant ships) is the electromagnetic log, more reliable as there is no mechanism subject to breakdown. In...

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Electromagnetic compatibility

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Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by...

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Pit sword

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part of the pitometer log, a device for measuring the ship's speed through the water. Electromagnetic log Pitot tube "Underwater Log Systems". USS Bowfin...

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Slovenian patrol boat Triglav

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Pastilshchik-D gyroazimuth/horizon compass KM-69M1 magnetic compass LEMM-2-2 electromagnetic log with echosounder functions AP-5 dead-reckoning tracer RN-1 radio...

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Project 10412 patrol boat

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Pastilshchik-D gyroazimuth/horizon compass KM-69M1 magnetic compass LEMM-2-2 electromagnetic log with echosounder functions AP-5 dead-reckoning tracer RN-1 radio...

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Well logging

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sensors. Logging tools developed over the years measure the natural gamma ray, electrical, acoustic, stimulated radioactive responses, electromagnetic, nuclear...

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Interior communications electrician

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indicator; Maintaining ship's anemometer system; Maintaining ship's electromagnetic log system; Maintaining ship's optical landing aid system on CVN platforms...

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Keystroke logging

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that a large enough sample is collected. Electromagnetic emissions: It is possible to capture the electromagnetic emissions of a wired keyboard from up to...

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Lambert W function

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{\displaystyle x\in (e,\infty )} : w 0 ( x ) = log ⁡ ( x ) − log ⁡ ( log ⁡ ( x ) ) , {\displaystyle w_{0}(x)=\log(x)-\log(\log(x)),} if x ∈ ( 0 , e ) : {\displaystyle...

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Schumann resonances

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low frequency portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, generated and excited by...

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Nuclear magnetic resonance

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instruments are typically low field NMR spectrometers. NMR logging, a subcategory of electromagnetic logging, measures the induced magnet moment of hydrogen nuclei...

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USS Hartford grounding

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the speed readouts of the Ring laser gyroscope navigator and the electromagnetic log, two other key pieces of navigation equipment. 12:22 The captain...

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List of abbreviations in oil and gas exploration and production

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gradient EMOP – EMOP well site processing log[clarification needed] EMP – electromagnetic propagation log EMR – electronic memory read-out EMS – environment...

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Electromagnetic Geoservices

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Electromagnetic Geoservices ASA (EMGS) is a Norwegian geophysical services company using proprietary marine electromagnetic technology to support oil...

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Black body

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blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. The radiation...

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Radio propagation

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vacuum, or into various parts of the atmosphere.: 26‑1  As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena...

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Attenuation

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relative to the solid frame. Attenuation decreases the intensity of electromagnetic radiation due to absorption or scattering of photons. Attenuation does...

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Electric guitar

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Rickenbacker, invented the electromagnetic pickups. Coils that were wrapped around a magnet would create an electromagnetic field that converted the vibrations...

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Radiation length

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It is also the appropriate length scale for describing high-energy electromagnetic cascades. The radiation length for a given material consisting of a...

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Les Paul

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Fir) was then equipped with a crude bridge and an electromagnetic pickup, neck and strings. The Log was constructed by Paul after-hours in the New York...

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Fractal antenna

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electrically small antennas they were compared to. Log periodics, a form of fractal antenna, have their electromagnetic characteristics uniquely determined by geometry...

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EMS

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Strasbourg, France Electromagnetic suspension, a method to suspend an object Electromagnetic spectrum, is the range of all possible electromagnetic radiation Ethyl...

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