Hi, Thanx for the input.
Click on the following links to see some examples that might help to explain my query.
1) Abu Dhabi STAR - 10-2
http://64.176.58.144/omaa10-2.pdf
2) Abu Dhabi STAR - 10-2H
http://64.176.58.144/omaa10-2H.pdf
Above mentioned chart 10-2 says RNAV 1 (GNSS) and 10-2H says RNAV 5.
It gives an impression that even if your A/C is RNAV1 certified, you still need to have a GPS input to your RNAV system in order to fly the approach of 10-2 otherwise you go for RNAV 5 procedure mentioned in 10-2H.
See this now:
3) Frankfurt STAR - 10-2
http://64.176.58.144/eddf10-2.pdf
4) Frankfurt STAR - 10-2E
http://64.176.58.144/eddf10-2E.pdf
10-2 for Frankfurt says:
"Procedures should be used ... by all RNAV (GPS) equipped a/c"
whereas 10-2E says:
"RNAV Transitions for GPS or FMS Equipped A/C"
Instructions in 10-2E are more precise and clear giving an indication that RNAV (GNSS) does not necessarily mean that GPS is required to an other wise sound RNAV system.
Please correct me if I am wrong, according to my understanding GPS input is not necessary for P-RNAV certification or for an aircraft to fly an RNAV 1 procedure. However a local area procedure can make it necessary.
There is no ambiguity if the statement is like "RNAV 1, GPS REQUIRED, RADAR REQUIRED" as mentioned in Catia's example.
But regarding the examples I have given, I am just interested to know if there is some standard phraseology and interpretation about this issue which I have addressed.
Thanks for your time.