|Quoting YYZatcboy (Thread starter):|
I am probably very confused, but can anyone explain the difference between an RNAV STAR (Approach) and a GPS Star?
I think your basic understanding of the difference between a STAR and an Approach is the first thing that needs to be addressed and IAHFLYR did a pretty good job of that.
Now there are a few different types of RNAV approaches.
RNAV(GPS)(GNSS), RNAV(RNP), VOR/DME
RNAV, GPS, and RNAV(DME
/DME). Maybe you meant the RNAV(GPS) v. standalone GPS approach? If so here is the very basic info you need to know right now.......
RNAV(GPS) approaches are all RNP0.3 or GPS, DME
/DME updating to RNP0.3 is not allowed hence (GPS). That also serves a purpose of letting pilots with just GPS units know they can shoot this approach (as long as the unit comply s with the proper TSO requirements). RNAV(GPS) approaches are basically redesigned stand alone GPS approaches that allow multi mode FMS systems (what you would find on a 777) along with GPS units to shoot these approaches.
Standalone GPS approaches were part of the original concept along with VOR/DME
RNAV approaches. Only airplanes with a actual GPS unit can shot standalone GPS approaches. IE
a 777 cannot shot GPS17
into KVCV. Its weird though that somehow this approach found its way into few UA
As we speak stand alone GPS approaches, along with VOR/DME
RNAV approaches, are being converted to RNAV(GPS) at a very fast rate and all should be gone sometime soon.
[Edited 2009-01-06 20:20:34]