1. From RNP Divergence to Performance Based Navigation Convergence
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 problem Current 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 problem Developments 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. F U T R E RNP Divergence P R E S RNP N T Europe B-RNAV US Boeing
Australia
Canada
South
America
China
Japan
Airbus
B-RNAV
P-RNAV
US-RNAV
RNP10
RNP 4
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 SORSG Main 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. RNPSORSG RNP 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. RNPSORSG RNP 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. Agreeing PBN
PBN specifies RNAV system performance i.e. accuracy, integrity, continuity, availability + functionality; - written up in navigation 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 performance and functionality requirements.
RNP X specifications
RNAV X specifications
Require on-board
performance monitoring
+ alerting
Do not require on-board
performance monitoring
+ alering

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

13. RNP SORSG - Harmonization
RNP SORSG - Harmonization
Area of Application
Nav accuracy
Designation of navigation standard:
Current situation
Designation of navigation specification: PBN concept (new)
Simplification results in
Lower costs for
Operators and ANSP
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

14. RNP SORSG Terminal 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 SORSG RNP 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 SORSG Approach 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 SORSG Approach 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 SORSG Performance Based Navigation Concept
No perf. monitor and alerting
Perf. Monitor and alerting
RNP 4, Basic RNP 1
RNP APP, RNP AR APP

20. Overview of Navigation Specifications

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

22. Through implementation to PBN convergence
Need for Global integrated implementation 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 SORSG Provisions
From concept to ICAO provisions …

24. ICAO Provisions Performance 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
RNAV 10
RNAV 1
RNP APP
RNAV 5
RNP 4
RNP AR APP
RNAV 2
Basic RNP 1
Advanced RNP1*
RNP 2*
* 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. Thank you for your attention!
END
Thank you for your attention!