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From RNP Divergence to Performance Based Navigation Convergence

Learn about the evolution of RNP towards a harmonized global standard in this informative presentation by ICAO's Erwin Lassooij. Explore the need for Performance-Based Navigation, status updates, provisions, and implementation solutions.

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From RNP Divergence to Performance Based Navigation Convergence

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  1. From RNP Divergenceto Performance Based NavigationConvergence Presented by Erwin Lassooij Manager Performance Based Navigation Programme (ICAO, Montreal)

  2. Goal of presentation To update participants about: • Need for Performance Based Navigation • The activities in ICAO on PBN • To inform on the status of the concept of RNAV and RNP in relation to PBN • To inform about other provisions to be delivered by ICAO • To inform on the envisaged timeline • Explain details on the PBN manual • Awareness an implementation • Actions proposed by COSCAP-NA

  3. PBN solution to modern navigation implementations Performance based navigation allows: • Predictable, flexible flight paths (through prescribed navigation specification) • Performance requirements that addresses the continuous growing number and combination of navigation sensors • Optimum use of existing capabilities in modern type of aircraft Solution for: Safety, efficiency, capacity, fuel efficiency and noise problems

  4. The problemCurrent ICAO RNP concept Current applications: • RNP 10 • RNP 4 • RNP 0.3 Containment based on: • Accuracy • Integrity • Continuity • Availability ICAO RNP provisions insufficient to meet terminal airspace and approach requirements

  5. The problemDevelopments outside ICAO • RNP concept has continued to evolve • RTCA/EUROCAE defined performance and functional requirements • Aircraft manufacturers deliver “RNP” based on different versions of requirements Confusion in implementation!

  6. Europe B-RNAV US P-RNAV Australia US-RNAV China Airbus RNP10 Canada Japan RNP 4 South America RNP Divergence F U T U R E P R E S E N T Boeing RNP RNP/RNAV

  7. ICAO Assessment • Individual ANC Panels unable to address the problem • Need for focal point in ICAO to address problems experienced with RNP Concept (GNSSP/4 recommendation 1/1) • ANC (163/9) approves establishment of Required Navigation Performance Special operations requirements Study Group (RNPSORSG) as coordinating group

  8. RNP SORSGMain Goals • Common understanding of the RNP concept and the relationship between RNP and RNAV functionality; • Harmonize use of RNP and RNAV functionality on global basis, for benefit of operators. • Identify operational requirements for RNP and RNAV

  9. RNPSORSGRNP Concept issues Main issues: • On-board performance monitoring and alerting • ICAO does not currently specify this • RTCA does specify, consistent with cockpit terminology • Addition of functionality requirements

  10. RNPSORSGRNP Concept issues • On-board performance monitoring and alerting function. A function on board the aircraft that detects and informs the crew when the RNAV system is unable to satisfy the performance prescribed in the navigation specification. • The required level of on board monitoring and alerting is stipulated in each RNP specification.

  11. Require on-board performance monitoring + alerting Do not require on-board performance monitoring + alering Agreeing PBN • PBN specifies RNAV system performance i.e. accuracy, integrity, continuity, availability + functionality; - written up innavigation specifications This is different than the RNP concept, which stressed navigation accuracy and ‘stopped’ at required performance.However, PBN is anchored in detailed navigation specifications, which contain performanceand functionality requirements. RNAV X specifications RNP X specifications

  12. Harmonizing PBN • Common understanding of the performance based navigation concept and the relationship between RNP and RNAV functionality • Harmonization between States

  13. Area of Application Nav accuracy Designation of navigation standard: Current situation Designation of navigation specification: PBN concept (new) Oceanic/ Remote 10 RNP 10 RNAV 10 (RNP 10 label) 4 RNP 4 RNP 4 EnRoute- Continental 5 RNP 5 Basic RNAV RNAV 5 En Route - Continental and Terminal 2 USRNAV type A RNAV 2 Terminal 1 USRNAV type B and P-RNAV RNAV 1 RNP SORSG - Harmonization Simplification results in Lower costs for Operators and ANSP

  14. RNP SORSGTerminal airspace • Common understanding of the performance based navigation concept and the relationship between RNP and RNAV functionality • Harmonization between States • Development of RNP 1 and 2

  15. RNP SORSGRNP 1 and 2 Work in progress • RNP 1 requires on board performance monitoring and alerting • Basic RNP 1 • Advanced RNP 1 (work in progress) • RNP 2 (work in progress)

  16. RNP SORSGApproach concept • Common understanding of the performance based navigation concept and the relationship between RNP and RNAV functionality • Harmonization between States • Development of RNP 1 and 2 • Development of RNP for approach

  17. RNP SORSGApproach Concept On-board performance monitoring and alerting required • RNP APP: RNP approach for lowest common denominator • Meets RNP0.3 in final segment • Basic GNSS/SBAS • Functionalities: VNAV optional • No Special authorization required • RNP AR APP (Authorization Required): Scaleable RNP (0.3 – 0.1NM) • Functionalities: VNAV, RF legs • Authorization required (small protection area) • Operational approval • Aircraft qualification

  18. RNP AR approach-example

  19. RNP SORSGPerformance Based Navigation Concept Perf. Monitor and alerting No perf. monitor and alerting RNP 4, Basic RNP 1 RNP APP, RNP AR APP

  20. Overview of Navigation Specifications

  21. EUROPE B-RNAV US Boeing P-RNAV Australia US-RNAV China Airbus RNP10 Canada Japan RNP 4 South America PBN Convergence…. F U T U R E P R E S E N T PBN PBN RNPSORSG initiatives

  22. Need for Global integratedimplementation programme“ICAO PBN programme” • Development/maintenance of provisions • Create awareness and acceptance • Training and awareness material • Ensure Implementation Through implementation to PBN convergence

  23. RNP SORSGProvisions From concept to ICAOprovisions …

  24. ICAO ProvisionsPerformance Based Navigation Manual • PBN Manual to provide a “one-stop shop” for States on how to implement RNAV and RNP in their airspace • PBN Manual being developed: Two Volumes: • Volume I – An Application of RNP and RNAV • Concept of PBN and how it is used • Implementation Guidance to States / Regions • Volume II – Compendium of Navigation Specifications * Work in progress

  25. ICAO provisions Standards Annex 2, 4, 6, 10, 11 and 15 Procedures PANS-ATM, PANS-OPS, regional SUPPS Manuals Manual on Performance based navigation Manual on RNP/AR procedure design Manual on Quality Assurance in Procedure Design • Ensure centralised maintenance of the concept • Gap analysis • Future expansion based on ops needs

  26. END Thank you for your attention!

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