737 CAT II

[nitpicker330]

Answer:---NO you don't wait. ( unless visual reference is established. )

In our mob ( A330 2 A/P's )
Any equipment degradation ( Aircraft or Ground ) the approach may not commence OR continue ( even if below 1000' ) unless the weather conditions are suitable for the new degraded approach capability.

So, using your Cat 2 if something required fails on a Cat 2 approach and the Vis is not suitable for Cat 1 then you MUST go around now unless already visual.


To quote our books----

Equipment Deterioration---
If an aircraft or airport systems failure necessitates a reversion to a degraded approach category, the approach may not commence (i.e. descend below 1,000 FT AAL) or continue, if already below 1,000 FT AAL, unless the reported RVR readings are at, or above, the minima for the degraded approach category