Baro-VNAV
Operational approval must also be obtained for Baro−VNAV systems to operate to the LNAV/VNAV minimums.
- may not be authorized on some approaches due to other factors, such as no local altimeter source being available.
- not authorized (NA) on LPV procedures.
cold temperature effects
Baro-VNAV is not authorized to fly the LPV line of minimums on a RNAV (GPS) procedure since it uses an internally generated descent path that is subject to cold temperature effects and incorrect altimeter settings.
...a minimum temperature limitation is published for each procedure for which BARO-VNAV minimums are published. The note...implies that the approach may not be be flown using BARO-VNAV when the temperature is below -23°C. However, BARO-VNAV may be used for approach guidance down to the published LNAV MDA.
—Test Prep 2026 4764.1
BARO-VNAV must be flown using the local altimeter setting only
reliance on barometric pressure for vertical guidance is not authorized near hazardous terrain