The North Pole moves as ice sheets melt (Greenland is losing mass)

[defacto7]

12. Interesting...

Yes, but that magnetic variation is a moving target. Not by much but changes happen and the global variation just increases the calculated differences. So pilots are using celestial navigation? That messes up my whole pilot training. (Which ain't all that much really) But talking to commercial pilots in the 90s, they were complaining about a 2 percent movement of the magnetic pole in a couple days which caused them to shift their charts to accommodate. The only celestial navigation I am acquainted with deals with the celestial or the ecliptic equators. Would charts actually have to define new coordinates simply because there is a .05 to .1 shift in the geo. axis? Why wouldn't the change be sufficient with a slight calculation alteration? We are not talking about the earth sliding 30 degrees, at least not in the next half millennium. And why would that effect the celestial coordinates? Is that directly connected to the earths lat/long grid? I'm rusty on this. Glad to hear input.