单词	grid variation
释义	grid variation grid variation n (Navigation) nautical the angle between grid north and magnetic north at a point on a map or chart. Also called: grivation grid variation See: grid magnetic angle. grid variation grid variation [′grid ‚ver·ē¦ā·shən] (navigation) In grid navigation, the angular difference between grid north and magnetic north. grid variation The angular difference between grid north and magnetic north. It is measured east or west from grid north and is also called a grivation or grid magnetic angle. AcronymsSeegate valve
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