Question re. RNP APCH on B737 NG
To all RNP APCH experts on B737 -
to fly a BARO-VNAV RNP APCH (using LNAV/VNAV) minimums, regulations (EASA AMC 20-27 and ICAO PBN Manual) require that both the lateral and vertical path deviation must be monitored throughout the approach. If Navigation Performance Scales (NPS) are not installed, this must be done by monitoring the numerical value of deviation, i.e. how many feet high or low, how much track deviation in NM.
Is it possible to do this operationally on B737 which are not equipped with NPS? You could monitor the lateral deviation using the legs page, and the vertical deviation using the descent page, but not both at the same time on the same FMC, as far as I know?
Any ideas on whether this would be possible on a non-NPS equipped B737 NG, or on how to monitor both on traditional B737?