Hi,
All correct...in EU world.
In some States, you can find a separate minimums listing. For the same RWY, you can have different minimum values. One for RVR (noted Rxxx), one for visibility (Vxxx) and in some cases one for converted met vis (Cxxx).
If those values are all identical, no prefix is attached to the value and then VIS has to be used without conversion if RVR is not reported.
If those values differ (R, V charted together), VIS has to be used without conversion if RVR not reported.
Hope it's clear
