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“PBN simply defines the aircraft navigation capabilities and required performance necessary to operate on a given air traffic route, instrument approach, or in a defined airspace.” Predefined performance requirements!The foundation concepts for PBN are Area Navigation (RNAV), and Required Navigation Performance (RNP).
Ground School 2017Created by Steve ReisserRNAV AND RNPRNAV provides flexibility. It can be used for station-based nav such as DME, orCoordinate-based systems such as GPS, or self-contained systems such as INS.It provides greater safety, more flexibility, shorter routes and reduced time enroute.REQUIRED PERFORMANCE NAVIGATIONRPN = RNAV + Navigation System Performance Monitoring and AlertingRPN is RNAV with enhanced knowledge of how the aircraft navigation system isperforming (RNAV on steroids). Onboard monitoring and alerting capabilityimprovespilot’s situational awareness, and can also enable reduced obstacle clearance or closerroute spacing without ATC surveillance. Like GPS RAIM (receiver autonomousintegrity monitoring), RPN monitors itself and is a safety critical characteristic.With regard to airspace or a specific operation, the associated RPN states theperformance navigation for the operation as a distance in NMs from the intendedcenterline of a procedure or route. To read more you may want to read the2006 FAA publication titled “Roadmap for Performance-Based Navigation.”The framework is GLOBAL and has the basis embodied in the International CivilAviation Organization (ICAO) setting criteria for RNAV 1 Departure and ArrivalProcedures, and RNAV 2 Q & T Routes. The U.S. implementation will also haveRPN and RPN-AR Approach procedures (Special Aircraft and AircrewAuthorization Required).
Ground School 2017Created by Steve ReisserRNAV procedures can provide benefit in all phases of flight, including departure, en route, arrival, approach, and transitioning airspace. For example, Standard Terminal Arrivals (STARs) can:Increase predictability of operationsReduce controller/aircraft communicationsReduce fuel burn with more continuous vertical descentsReduce miles flown in Terminal Radar Approach Control (TRACON) airspaceReduce interaction between dependent flows in multiplex airspace
Ground School 2017Created by Steve ReisserOptimized Profile Descent (OPD)As a component of its Trajectory-Based Operations NextGen initiative, FAA has authorized development of arrival procedures with vertical profiles optimized to facilitate a continuous descent from the top of descent to touchdown. OPD is designed to reduce fuel consumption, emissions, and noise during descent by allowing pilots to set aircraft engines near idle throttle while they descend.Utilizing RNAV, DFW implemented initially diverging, fanned routes in September 2005.