In relation to GPS, what is the difference between B-RNAV and P-RNAV?
B-RNAV or Basic Area Navigation was the original RNAV implementation in Europe. RNAV refers to the method of navigation which allows aircraft operation on a certain flight path in any airspace without the use of ground based aids. B-RNAV requires track accuracy of ±5NM for at least 95% of flight time for En Route navigation. B -RNAV is achieved using inputs from VOR/DME, DME/DME or GNSS and/or INS. Precision Area Navigation (P-RNAV) is being introduced for RNAV applications for Terminal navigation. P-RNAV requires track accuracy of ±1NM for at least 95% of flight with advanced functionality and a high integrity navigation databases. P-RNAV capability is achieved using inputs from DME/DME or GNSS and/or INS. P-RNAV procedures are designed, validated and flight checked to a common standard.
