What is purpose of mixing LOC/VNAV in this landing method?
$\begingroup$
$\endgroup$
2
-
4$\begingroup$ The purpose is landing, could you be a bit more specific with your question? $\endgroup$– GdDAug 3, 2017 at 7:48
-
$\begingroup$ There are many landing modes (FLS, ILS, MLS etc..) but when will we use Mix LOC/VNAV landing method ? $\endgroup$– Hosakoti SanthoshaAug 3, 2017 at 9:04
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
A VNAV with localiser approach is normally a backup to a regular ILS should there be a glide slope unserviceability. The use of VNAV to manage the vertical portion of the approach would allow the use of APV minima which are normally lower than using a vertical speed mode.
VNAV is a better mode when conducting non-precision approaches as the aircraft is still following a defined glideslope - albeit derived from a database - which is more accurate than trying to follow a tabled set of heights and distances using vertical speed.
