Originally Posted by
FlyingStone
The old 737 EFIS classics had this (optionally, I believe). With the world going towards PBN and curved (RF) procedures, this wouldn't be particularly useful.
I've flown curved legs without a FD. The aircraft had a CDI. It was a complete non-event. As
pineteam said earlier, had Boeing and Airbus installed a CDI on the nav display, we could easily do "raw data" RNAV procedures.