aerobat77,
I'd suggest you re-read the 14 pages of
Appendix 1 (New) to OPS 1.430 - Aerodrome operating minima in the EU-OPS1 regulation document.
page 70-84, available here:
http://eur-lex.europa.eu/LexUriServ/...01:0238:EN:PDF
These pages are quite clear : all limits on horizontal visibility are expressed in RVR/CMV.
(“Converted meteorological visibility (CMV)”. A value (equivalent to an RVR) which is derived from the reported meteorological visibility, as converted in accordance with the requirements in this subpart)
The conditions for using Reported Meteorological Visibility after converting it to RVR/CMV is explained and constrained by the paragraph:
(l) Conversion of reported meteorological visibility to RVR/CMV.
1. An operator must ensure that a meteorological visibility to RVR/CMV conversion is not used for takeoff, for calculating
any other required RVR minimum less than 800 m, or when reported RVR is available.
Note: If the RVR is reported as being above the maximum value assessed by the aerodrome operator, e.g. “RVR more than 1 500 metres”, it is not considered to be a reported value for the purpose of this paragraph.
2. When converting meteorological visibility to RVR in all other circumstances than those in subparagraph (l)1. above, an operator must ensure that the following Table is used:
Table 11
Conversion of met visibility to RVR/CMV
Lighting elements in operation RVR/CMV = Reported met. Visibility ×
Day Night
HI approach and runway lighting 1,5 2,0
Any type of lighting installation other than above 1,0 1,5
No lighting 1,0 Not applicable
In short : limitations are in RVR.
In specific conditions, reported meteorological visibility can be used as a surrogate for RVR after conversion.
Luc