My understanding is that the change in magnetic declination (caused by the change in magnetic north) is predictable in the short term (this is why maps state th

My understanding is that the change in magnetic declination (caused by the change in magnetic north) is predictable in the short term (this is why maps state the rate of change but only for a certain time period) but is not predictable over the long term. Ref: https://www.sco.wisc.edu/learning-center/magnetic-declination/ https://www.sco.wisc.edu/learning-center/magnetic-declinatio...