Dme Arc Tolerance
We have instrument rating tolerances published for ILS, VOR, NDB tracking etc but I cannot find any reference to the allowable tolerance when flying a DME ARC approach.
The A320/A330 FMGC does a pretty good job of flying these approaches but if it is not in the data base then what is the tolerance allowed either side of the ARC, +/- 1 nm, 2nm?