Originally Posted by
extricate
Hi there,
Let’s say an airport reported METAR visibility 0200, RVR 750. The requirements to shoot the ILS approach requires CAT 1 of Visibility 800m / RVR550m, The airport only has CAT 1 landing. I’m able to meet the RVR criteria but not the Visibility criteria, am I able to shoot the approach?
Yes, the RVR is controlling.
Originally Posted by
extricate
How about dispatch stage? Do we need both the vis and RVR?
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).