Re FAa rules
Aterpster - As I implied it was never easy for us foreigners to understand fully the FAA's position on some of these points , and I understand that individual operators can negotiate variations with their principal inspector, but some of the arguments I recall with the FAA didn't make much sense unless you assumed that they assumed (still with me?) that the pilots would seek some reference before landing, albeit not at a predetermined height. I am happy to accept that this was another misundertanding (one of many!). I am surprised though that in RVR 600 (ft) the ground wasn't visible until after nosewheel lowering, In our simulations it was visibile in RVR > 125m, say 400 ft.