Could somebody please explain to me the comma seperated values in these files. What does each one control? I can create sids and stars now but if I had knowledge of this I might be able to do a little extra tweaking.Cheers

I don't remember the details, but if you create an "interesting" SID/STAR with speed constraints, altitude constraints (with and without A/:(, etc., and then look at the produced file you will probably figure out most of the important fields.Lee Hetherington (KBED)

Thanks Lee. It's mostly that first number I don't get. Most times it's zero sometimes 2 and some 25. Its function is unknown to me.Regards ikat