Automatic boresighting of head-worn display

A system and method for automatic boresighting of a head-tracking system for a HWD or HUD accesses georeferenced pose (position/orientation) data of an aircraft or other mobile platform from a georeferenced head-tracker and platform-referenced head pose data (based on fiducial markers within the aircraft cockpit) from the inertial measurement units of an optical, magnetic, or optical/magnetic platform-referenced head tracker (PRHT) and determines misalignments of the PRHT relative to the boresighted inertial reference system (IRS) of the aircraft. Based on the determined misalignments and accessed data, the IMUs of the PRHT may be updated and aligned with the aircraft boresight. Misalignments of head-mounted fiducial markers with the boresighted IRS may be determined for updating the alignment of an optical head-tracker fixed relative to the aircraft cockpit.