NDB approaches really can't be obsolete can they? There are many published NDB approaches throughout Europe and the rest of the world. If they were obsolete don't you think we would have been told to stop using them?
Cirrus like many aircraft manufacturers have decided to do away with the ADF as many approaches in the USA can now be GPS where they were previously NDB only. That is not the case in Europe surely?
Regards,
Chopperpilot 47