Discuss the critical nature that Performance Based Navigation plays in Global ATM. Consider legacy ground-based navigational aids such as VOR, TACAN, NDB, etc., vs. RNP and RNP-AR in your discussion. Additionally, the following concerns should also be addressed in your discussion.

Is government regulation needed to further the transition to PBN?
What guidance do member states receive from ICAO to help the transition?
What areas of concern do you see in your selected region that you have selected for your research paper?