Originally Posted by
usedtobeATC
PAPI aren`t approach lights, they are glide slope lights
.
Uh....no.
Precision Approach
PATH Indicator.
They are a Visual Glide Slope Indicator which can be VASI or PAPI systems.
Important to get your nomenclature right.
Often a VGSI is not coincident with an ILS glideslope and is marked as such on the approach plate.