Is there a note on how to use this feature properly? Ama complete novice on this vnav stuff. But I wd like to undertsand how it is supposed to work. One thing, how do you specify the runway, circuit and circuit dimensions at the destination airfield? Or is this not the intention?

D

Data from the vertical navigation model is not currently used in in-flight mode. In a future version it will be used to provide such alerts as you mentioned, "time to start your descent" etc.

SkyDemon does not currently support the notion of multiple sectors in one route file, but this is a feature that we are hoping will make the next version (after the forthcoming one).