Question: what is rnav 1 and rnav 2?
Answer: RNAV 2 supports navigation in en-route continental airspace in the United States. RNAV 1 is the RNAV specification for Precision Area Navigation (P-RNAV). ... P-RNAV is used to provide more routes and terminal area procedures and may be used down to the final approach fix (FAF) on designated approach procedures.