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ritchienavigation.com
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Definitions (15)
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glossary adjustment
The process of eliminating compass error sometimes called Compensation.
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athwartship
Across the ship from side to side or, in other words perpendicular to the centerline of the vessel.
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card
The compass part imprinted with the heading graduations, commonly referred to as the dial.
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built-in correctors
An assembly of two brass or aluminum rods with magnets that can be rotated to create a magnetic field, equal in strength but opposite in polarity to the boat’s disturbing magnetic field, thereby elimi [..]
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cardinal points
N 000°, S 180°, E 090° and W 270°
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course over ground
The track over ground of the vessel’s course vector combined with leeway and drift vectors.
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dead reckoning
Determining the position of a vessel by adding to last fix the vessel’s surface course and speed for a given time.
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deviation
The angle between the compass heading and the corresponding magnetic direction. The differences caused by magnetic influences onboard the boat, and the change in the boat’s heading.
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intercardinal points
NE 045°, SE 135°, SW 225° and NW 315°
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