Welcome to the asylum
Only yesterday I tried to figure out where the current RVR requirements are for various Low Vis operations. Our company manuals have recently been amended so I thought I'd check the source. Well the 2008 EU OPS Subpart E has the old data and the new 2012 EASA Subpart E is paper thin and lists no RVR requirements. So right now I have no idea where it's is coming from
