C'est pas le P.A.P.I. Cela s'appelle ILS
PAPI (Precision Approach Path Indicator) is a visual glide slope indicator. There are normally four lights to the left of the touch down point and sometimes also four lights to the right.
The lights show red or white depending on your altitude. Standing on the ground you woud see only red lights.
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Photo taken in Chassieu, France
Misplaced? Suggest new location