Hi again,Maybe instead of a long message I should have posted a of screenshot from a commercial product called ultra-nav to better illustrate the complexity of the issue raised in first place.DISCLAIMER:The above reflects only a personal opinion and was written without any intend to offend, harm or criticize in any way or manner any individual, institution, association or company including PMDG.Michaelhttp://forums.avsim.net/user_files/70817.jpg

Thanks, Darren.It turned out to be a rather informative thread, didn't it.Thanks everybody for the useful information.Cheers,Henri

With the info from Don for the PMDG charts reading and Micheal for the "real part" I think I'll get to something useful.. :) Thank you, Luca