The discussion is not about P-RNAV, it is about RNP-AR...
The difference, among other things, is coded turns...
There are many recommended functions, virtually none of which have been implemented...
DH,
I look at it this way, one is either authorized or not....sure, one can look at a chart, and fly the procedure, but there are many variables, one just may not be aware of...
Even with coded procedures, the different configurations act differently, and are coded differently...the 424 code for a honeywell box on a 737-800, is not the same 424 code for a Thales box on a A320.
While the procedure waypoint may have an altitude at or above, it is working with the other waypoints, and the way the individual box interprets waypoint...this is why public procedures and the coding is having such a tough time, between the rounding up/down, waypoint and other resolution values, they can all act different...that is why when a procedure is designed, is it desktop simmed, full motion simmed, and flight validated PER the specific ac type...
It is very, very difficult to code a multi-variant RNP procedure....
Last edited by FlightPathOBN; 12th July 2012 at 21:55.