I understand that approaches with LNAV/VNAV minimums may be flown by two types of systems, one is a TSO C145A/146A WAAS GPS and the other is a Baro VNAV system.
Could somebody kindly answer the following questions:
- Why a pilot of a WAAS GPS equipped airplane would choose to fly an LNAV/VNAV approach instead of an LPV approach? Are there perhaps airports that have LNAV/VNAV approaches, but don’t have LPV approaches? If that is the case, what is the reason for not having LPV approaches, considering that ground equipment is not necessary for both types of approaches?
- Are all the ‘non WAAS’ Garmin 430 ‘Baro’ equipped?
- I would imagine that even in a small airplane the altimeter that provides altitude information to the ‘Baro’ GPS is a separate altimeter from the altimeter in the panel of the airplane and has to be adjusted by the pilot as the panel altimeter. And the corrections required for very cold temperature are inputted from a table in a similar way. Could you please confirm?
Thanks
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