Discussion and case analysis of PBN barometric vertical navigation flight procedure criteria

PBN Vertical Navigation (VNAV) flight procedure refers to 3D RNP approach with vertical guidance, while Lateral Navigation (LNAV) refers to 2D RNP approach without vertical guidance. According to the relevant requirements of RNAV (GPS) approach procedures in ICAO PANS-OPS and USA FAA TERPS criteria for PBN instrumentation procedure design (8260.58A chg1 and 2), the impact of the two specifications on the key design parameters and vertical path angle of VNAV procedures, especially the horizontal protection area and vertical obstacle clearance margin in OAS surface(ICAO) and OCS surface(FAA) is discussed in this paper. Taking runway 06 of an airport as a case analysis, this paper designs VNAV procedures of two specifications when RNP values are 1 and 0.3(only the final segment), evaluates and determines key obstacles, and gives suggestions for PBN in Barometric Vertical Navigation specification.