Thx. Shore Guy.
The link makes all the difference.
According to it :
"
Three-bar VASI installations provide two visual glide paths. The lower glide path is provided by the near and middle bars and is normally set at 3 degrees while the upper glide path, provided by the middle and far bars, is normally 1/4 degree higher. This higher glide path is intended for use only by high cockpit aircraft to provide a sufficient threshold crossing height. "
X
Therefore my memory wasn,t so bad.
Nevertheless...
This is stated ONLY for the VASIS,as for the PAPI I haven´t found anything about the different pilot visual reference from the 2W-2R.
Should we assume then that this is only an improving feature of the VASIS that the PAPI cannot offer ?
Because, I think I will NOT place my wheels or boogey on the same spot if I am landing on the same airport with the same PAPI with a B737, than with a B744. ( or is it ? ).
Thx Richatom for your reply too.
Couldn,t agree more.
( we´re getting somewhere here... )