B747 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 108; Flight Crew Total 14047; Flight Crew Type 3781
Situational Awareness; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types
General None Reported / Taken
Aircraft; Human Factors
EPLED intersection:  10 degrees east variation on map and flight plan; IRS steering the plane has 29 degrees east variation - 19 degree navigation display error checking course number to be flown crossing EPLED.BITTE intersection; Alaska ADIZ report:   23 degree east variation on map and flight plan; IRS steering the plane has 39 degree east variation--16 degree navigation display error checking course number to be flown crossing BITTE.Unable to comply with standard world aviation navigation auditing standards; compass has 900 percent more error than design build of a long range class 2 navigation system.
A B747 Captain reported his aircraft's navigation system is unable to comply with navigation standards.