Here is the deal. Since the magnetic north pole and the geographical one are not co located we face a situation called magnetic variation. There are lines drawn on a chart that have either easterly or westerly variation. Now the reading on your compass as you see it is your magnetic heading but you need in most cases to apply the variation. West you add and east you subtract to get your magnetic course. For example you want to steer a 090 course and your line takes you through a area of 21West variation you would steer a magnetic heading of 111 degrees. Remember east is least and west is best. Hope that helps.
"Duty, that grim demanding bitch, come to call with all her nagsome sisters, would never give a man a moment of his own."
A Kings Trade
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