Vibal?

[Olympic260]

Goodmorning,


Yesterday I come across the airport chart of NANTES (LFRS), at the rnw 21 informations it has

HIRL CL REIL PAPI-L VIBAL,

The last one "VIBAL" what exactly is? I have never seen this before in any airpot. Anyone have any clue?

Regards

Chris

[Pub User]

From the French AIP:

Visbilité balise

Runway-marker visibility



I confess, I'm no wiser. Anyone seen this thing?