Parabellum:-- nope no confusion mate. CAT 3B at KJFK still requires at least 600' RVR to "commence the approach" you cannot commence any approach on the planet in zero zero.!!
Any approach below 1000' can be continued to minima for a look see if the RVR falls below minima. CAT 3B on the other hand can continue to land as visual ref is not needed until after nose wheel touchdown.
Although you'd be pretty brave to land in zero zero CAT 3B...
Last edited by nitpicker330; 12th July 2012 at 10:26.