Originally Posted by
Capn Bloggs
No; read what Mansfield said. "As accurately as it can" is FTE. The ANP can be 0.02, but the aeroplane can be off track for a number of reasons, including hand-flying Bloggs making a hash of his RNP approach when the AP is out of action.
Yes granted, in my attempt to simplify I probably used rubbish terminology. What I meant to say was "to the highest navigation performance it can, regardless of airspace".