The FAA has released a road map for performance-based navigation that will enable pilots to use Rnav and RNP procedures in all phases of flight in the National Airspace System by 2020, leaving only a minimal network of ground-based navaids in place. In the near term (2003 to 2006), the first set of public Rnav and RNP guidelines will be implemented as the FAA continues to work on more widespread operations. The midterm (2007 to 2012) will see Rnav become the primary means of navigation in the NAS and the beginning of the end for ground-based navigation in 2010.