Join Date: Jan 2013
Location: Montreal, QC, Canada
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Re: Magnetic Variance
Dean I'll give you some easy rules to burn in your brain.
Up north the true north and magnetic north sit beside each other. From where you are, the difference is in degrees on the heading..
A saying is: "East is least. West is best." (least=minus) (best = add) on any map with true long. and lat. lines.
So "True heading and variance = magnetic heading."
If variance is east, you subtract the number from the true heading to get magnetic heading.