Since when does heavy iron have anything but a slaved HSI, a non-adjustable
flux gate and/or glass tube EFIS, along with dual instruments? Setting a DG
is for the rest of us spam can drivers who don't have a flux gate or HSI. I
doubt a whiskey compass is even included on most of their panels.

Besides, at that time of the morning, they could have taken the runway on
the roll, the markings could have been worn down, etc? It's all speculation
without the data.

The analysis of the FDR and CVR should prove useful.