Originally Posted by
KingAir1978
SonicBum (nice nickname!), In EASA land when you're at the planning stage, you cannot apply the conversion, because of point (3), when you're in flight and the visibility drops below 800m and you want to shoot an ILS approach, RVR is required. Therefore point (1) prohibits you from doing the conversion.
Hi King,
guess I have spent too much time in the SIM and not enough on the line in the past couple of years.
Here is an answer I gave to a similar question a couple of years ago.
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).
in
THIS thread.