FE Hoppy:
PBN specifications don't match the descriptions you give. For example RNAV 1 can be GPS or DME/DME or DME/DME/IRS. Each state can declare which is acceptable. If DME/DME or DME/DME/IRS only then the critical DME assesment is required. If GPS then the older equipment won't be RNAV 1 certified.
I don't believe I said to the contrary for SIDs and STARs in the U.S.
Indeed, I stated the hierarchy incorrectly:
Dual GPS
GPS
Blended IRU updated by GPS (dual GPS for RNP AR IAPs)
DME/DME (must be excluded for RNP AR)
VOR/DME (must be excluded for RNP AR)
VOR/VOR (must be excluded for RNP AR)
There are additional requirements for RNP AR, depending upon the RNP value RNP 0.30 to as low as RNP 0.10:
Dual FMS
TWAS
and, other inputs that are beyond my domain.
