Those were the designations for the custom RNP approaches. You must be flying QANTAS?
In AUS, they were a bit more creative, (so was the guy naming waypoints) with the letters more or less designating the direction the procedure was coming from...even though we had to name them that way, I was still never sure how the got to M,P,U, and others...
Suffice to say, the public RNP procedures are w,y,z,etc but not according to minima..
Addition: The letter designations are used for the transition designation, so the RW19 RNAV-M, will be a different procedure that the RW19-RNAV-P. The straight in segment will be the same, but the letters designate the different transitions....
Last edited by FlightPathOBN; 17th Mar 2012 at 00:11.