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This document provides information on the principles and procedures of magnetic compass adjustment and compensation. It includes a check-off list, a table of compass deviations, and methods for correcting various errors.
Learn how to use a deviation table to correct for compass error and find true heading. See examples, diagrams and USCG navigation problem with solutions.
1 wrz 2018 · The magnetic compasses are a very important tool for the safety of navigation. Vessel owners and masters must ensure that magnetic compasses are maintained in good working order, adjusted and a table or curve of residual deviation is available.
Magnetic declination (variation) calculator based on the IGRF magnetic field model. Estimates magnetic delination world-wide from 1900 - present.
Variation compensates for the fact that the magnetic north pole moves around, while deviation compensates for local disturbance to the earth’s magnetic field caused by metallic objects close to the compass.
Calculate compass, magnetic and true direction by a given direction, magnetic declination and deviation. Find magnetic deviation table values for every course and learn how to correct or convert compass points.
Magnetic deviation is the angle from a given magnetic bearing to the related bearing mark of the compass. Deviation is positive if a compass bearing mark (e.g., compass north) is right of the related magnetic bearing (e.g., magnetic north) and vice versa.
