Which ways North?
“Grid to Mag, Add – Mag to Grid get rid”
I’m going to have to readjust my Navigation courses a little.
Have a read of the article from Grough, for the first time in 200 years the Magnetic variation is nil or even slightly east, depending on where you are.
Mainly affecting the far west of Cornwall at the moment.
Another useful website allows you to calculate the magnetic variation for your location: