FltPathOBN:
The pole is currently moving at 50 km/year...and this is the basis for navigation?
About 10 years ago one of the Flight Standards Aces at the FAA floated a proposal to converted to a true north system in the U.S. We asked, "What about the 10's of thousands of aircraft with only magnetic compasses and a DG or only a flux gate DG/HSI?"