Here is base point where "GLOBAL BEARING" is installed.
Base point is in Yamaguchi Japan in this case.
This base point is defined by latitude and longitude so that "GLOBAL BEARING" is able to be installed anywhere on the Earth.

Audience move the shaft as they wanna do.

Extending the vector of the shaft to the ground like the red line on left figure.

The vector of shaft breaks-through the ground, and reaches to the opposite side of the Earth.

On the screen, the virtual-looking Earth and the white big line which is traced with red on left figure are synchronized with the actual Earth and the shaft.
The original program processes this task without delay at all.