Compass Variation Adjustment

Compass variance, also known as magnetic declination, is the difference in angle between magnetic north and true geographic north. In some geographic locations, the difference between magnetic and geographic north is great enough to cause the compass to give false readings.

If a customer moves, or drives across zones the compass variation will have to be reprogrammed so that the compass will display the correct readings. If problems like these occur, the compass variance must be set. Use the following procedure to program the compass zone variation.