True North - Magnetic North, what's the captain going on about?

Found this wonderful little article that explains in practical terms what is True North and what is Magnetic North. Plus how to calculate it. No they are not created equal and vary around the globe.  Always advisable to get it right because for example New Zealand's magnetic north is 20 degrees east of true north where LA is just 12 degrees east of true north, so might be the different between hitting that reef or not.  Anyway check out link below if I have just totally confused you :)


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