PAPI
The other day, doing a visual app. , I rememberer ( hazily of course ) something about the visual approach vertical aid 3º glideslope being , not of 2 whites- two reds meaning ON G/S, but for a wide-bodied a/c , this reference being 3 WHITES - 1 RED.
Am I remembering correctly ?
( If so, I,ve been doing most of my approaches wrong for a loooong time )
Where can I check this doc. ? ( forgot most about the air law subject for ATPL )
THX .