Greetings
I agree partially, (on the NAV DISPLAY the range marks are curved,no?)
The limitation as I posted before comes from the inability of the processor used in the early FMS to process ARINC 424-10 and beyong curved leg types such as Radius form FIX, Dme Arc and so on.
The curved line, the old system could draw was a fake circle composed of zillions of waypointsone next to the other, these waypoints are called "Fantom Waypoint" because just like Gasper you know they exist but you cannot see them.
I suppose that the computor reset on the graphic generator side)was triggered by too namy waypoints to process
