[RhoTheta]

What bullshit. Magnetic compasses have been in use for 600 years and in that time the Earth's magnetic north pole has barely moved. By this "reasoning," magnetic north would have by now moved to Korea.

My reaction too. We do have to correct Magnetic North to True North (and visa versa), and the correction factor changes enough so that charts don't print the correction factor on them lest they become obsolete. So the field is changing, but massive projections as to when the field will reverse, when the change seems slow, irregular, and un-uniform seems unwise.

[Dog Gone]

See posts 10 and 11.