There are two opinions. (both my company colleagues and PPRuNe forums)
1. RVR is observation, not forecast.
so I have to compare TAF visibility 600m and appraoch minima's visibility 800m (not RVR 550m)
and It should be considered WX below minima
2. TAF visibility 600m is above appraoch minima's RVR 550m
so there is no problem, dispatch with 1 alternate
I'm not sure which is right.
It is not clear in my company regulation.
and I just wonder what ICAO/FAA/EASA ruels and others aviation workers opinion.
Thank you for many reply.
and please give us more other thinks.
many thks.