ATC and RNP

[wof]

What does it mean when ATC ask about RNP? I suppose they already know the RNP at the area we are flying on. Or they only need to know the aircraft certified RNP?

[Amadis of Gaul]

The answer to your question is yes.

[BOAC]

When and where are they asking?

[wof]

UAE FIR during cruise (landing Abu dhabi)