Airway RNAV requirement
Its easy enough to check the RNAV requirements of a specific approach, but where can I check the RNAV requirement of an airway?
In the NAV GEN it states En-route continental as being RNAV 5, If I have an unable RNP alert for some reason I would need to tell ATC and get placed onto an airway without RNP alerting requirements.
How do I see it the airway has the requirement or not?