"Have a look at the front of the TEXT Jepp binder and you'll find ..."
Well, we don't carry a complete Jepp binder. We assemble a tripkit containing plates for dest+alternates. But anyway, thanx for the info. I have done alot of CATIIIa's and to my understanding the 50 RA is what we use. It has indeed puzzled me for a long time but I now understand that it is because of specific RYR ops...not having the complete binder onboard.