I beg to differ, engfireleft, if the approach is on a ground-based navaid (for the pendants: VOR, VOR/DME, TACAN, NDB, that is non-LOC) it is an FMS approach flying an overlay. The approach is drawn to TERPS, PANS-OPS standards for the terrestrial navaid, not to RNAV or RNP standards. There is no specified RNP because it is a conventional approach flown on the FMS. the crew must be trained appropriately, the database current and used. The Canadian-built and trained business aircraft is flown and trained thusly.
GF