It does seem archaic that true north isn't used. This NavCanada presentation - gives a good overview of the issues in changing. https://www.navcanada.ca/en/ma

It does seem archaic that true north isn't used. This NavCanada presentation - gives a good overview of the issues in changing. https://www.navcanada.ca/en/magnetic-north-vs-true-north.pdf https://www.navcanada.ca/en/magnetic-north-vs-true-north.pdf