glendalegoon said;
I can't speak for southwest airlines. But with our HUD equipped planes the HUD is only used for CATll/CATlll ILS approaches.
The SWA HGS has flight path vector information, which will show where you will touch down at the input gpa.
So your HUD won't show this? The SWA HGS also warns of an impending tailstrike, and offers windshear avoidance and TCAS RA information. It can be used for low vis takeoffs, or regular takeoffs.
It seems odd that yours is only used for lower than CATI approaches.