Originally Posted by
sonicbum
Yes, the RVR is controlling.
At dispatch You will only have the forecasted visibility issued by the TAF. In Your example a RVR reading is available at destination so You are not allowed to use the conversion of reported meteorological visibility to RVR, hence if forecast vis +/- 1 hour is less than the required one for the approach You are considered below minima and need 2 suitable alternates to dispatch (EASA land).
thanks for this. I've noticed during dispatch that both taf and metar were given. Metar has both rvr and viz. Understand we should look at taf to decide whether the aerodrome is below landing minima since metar' validity is shorter. Taf only has viz.