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Compass
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== External links == {{Commons and category|Compass|Compasses}} {{Wikiquote}} * {{cite EB9 |wstitle = Compass, Mariner's |volume= VI | pages=225-228 |short=1}} * [http://msi.nga.mil/MSISiteContent/StaticFiles/HoMCA.pdf Handbook of Magnetic Compass Adjustment] {{Webarchive|url=https://web.archive.org/web/20190529102504/http://msi.nga.mil/MSISiteContent/StaticFiles/HoMCA.pdf |date=2019-05-29 }} * Paul J. Gans, [https://web.archive.org/web/20031216131745/http://scholar.chem.nyu.edu/tekpages/compass.html The Medieval Technology Pages: Compass] * [http://zapatopi.net/kelvin/papers/the_tides.html Evening Lecture To The British Association At The Southampton Meeting on Friday, August 25, 1882]. Refers to compass correction by [[Fourier series]]. {{Flight instruments}} {{Aircraft components}} {{Orienteering|type=collapsed}} {{Authority control}} [[Category:Chinese inventions]] [[Category:Magnetic devices]] [[Category:Navigational equipment]] [[Category:Ancient inventions]]
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