Cat II/IIIa and Visual Aids

[gnss]

I have couple of questions for Cat II/III qualified pilots:

i) What use (if any) do you make of PAPI/VASI at decision height when undertaking a Cat II/IIIa approach? I.e. is it an input when you make the decision to land.

ii) If you use the PAPI/VASI at DH would a high or low indication cause you to initiate a go-around?

Many thanks in advance.