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BRUNTON

COMPASS TERMS

azimuth ring
The rotating part of the compass that holds the damping fluid and the magnetic needle and has degrees engraved around its edge from 1 to 360. Also known as housing. <
graduations
The series of degree markings on the azimuth ring used for taking bearings.
bearing
The direction of travel from your current position to a landmark or destination expressed in degrees from 1 to 360. Same as azimuth.
declination
The difference in degrees between magnetic north (the direction the magnetic needle on a compass points) and true or geographical north (the direction maps are printed toward).
baseplate
The see-through plate of an orienteering compass onto which the compass housing is mounted.
lensatic compass
A compass which uses a retractable lens to read the bearing while simultaneously sighting an object.
scale
The distance between two points on a map as they relate to the distance between those two points on the earth.
protractor
Sometimes built into a compass, this instrument allows you to determine and measure angles in degrees and is most useful when projecting magnetic lines across your map.
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