NAV/GPSRNAV VS PBN/RNP2 and you
Until July 13th, GPSRNAV is seen as equivalent to RNP2 as a navigational tolerance ATC can use for separation. Come July 14th, GPSRNAV is consigned to history - it is an extolerance, shuffled off this mortal plane, fallen off the navigational perch.
ATC use a screen based presentation of the separation tolerance we can apply between aircraft which is dependant on how the flight plan is filled out. At the moment when pilots flight plan GPSRNAV we get an indication that no GNSS gear is carried. When we open up our electronic copy of the flight plan and see GPSRNAV we know what separation standard we can apply and adjust your flight plan to get the right screen indication (GPSRNAV=RNP2)
Come July14, GPSRNAV ceases to exist and I'm betting the rule will be ATC can't make the substitution.
Upshot is to get your flight planning in order before July 14 (there is an AIP SUP) otherwise ATC will be forever asking "are you RNP2?" or using 30nm cross track as opposed to 7nm which won't help you or me...