Hi again Skyjob
Thanks for the detailed explanation, very useful..
Excuse me for appearing dull, but where did you get the following info from?
An RVR of less than 750 m may be used For Category 1 approach operations to runways with FALS (Full Approach Lighting System) (see below), Runway Touchdown Zone Lights (RTZL) and Runway Centreline Lights (RCLL) provided that the DH is not more than 200 ft.
Cat 1 with a DA between 200-210 ft, requires an RVR of:
550m FALS*
750m IALS
1000m BALS
1200m NALS
I can't find a reference for these values anywhere, but you obviously have.
Cheers