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The PBN specifications are described in the ICAO PBN Manual, Doc 9613, where safety assessment considerations and implementation guidance for the identified navigation specifications are considered together with the background and purpose for each specification.
The implementation considerations for the ANSP, the approval processes, the detailed aircraft requirements and operating procedures are identified along with specific pilot knowledge and training where applicable. The navigation specification also details any requirements for control of navigation database and oversight of operators.
The ambition for deployment of PBN in UK airspace is the utilisation of the most relevant PBN specification for the intended operation. Although RNAV 1 is the basis of future terminal airspace developments, this does not preclude the use of RNP 1 or Advanced RNP performance and functionality where appropriate. As airspace redesign developments are introduced, choice of navigation specification will need to have regard to the aircraft fleet capability.
RNAV is a method of navigation which permits the operation of an aircraft on any desired flight path; it allows its position to be continuously determined wherever it is rather than only along tracks between individual ground navigation aids.
RNP specifications have an additional requirement for on-board performance monitoring and alerting. This means that if the RNP system does not perform the way it should then an alert should be provided to the flight crew.
In practical terms what this means is that ATC can have greater confidence in the track keeping performance of the aircraft and this greater confidence translates into being able to place routes closer together.
Repeatable and predictable turn performance:
Both functionalities are associated only with RNP specifications. RF is a path terminator used for SIDs, STARs and Approach. FRT is a leg transition used when the FMS is in the en-route mode.
A PinS approach is an instrument RNP APCH procedure flown to a point-in-space from which a Missed approach or visual approach to land can be instigated. It may be published with LNAV and/or LPV minima.
Comprises various elements outlined in this RNP approach overview.
The International Civil Aviation Organization’s (ICAO) PBN Manual (Doc 9613) identifies three RNAV navigation specifications with their intended applications:
Doc 9613 identifies seven RNP navigation specifications with their intended applications:
The ICAO PBN Manual (ICAO Doc 9613 Edition 4) consists of two volumes:
ICAO Manual on the use of Performance-based Navigation (PBN) in Airspace Design (ICAO Doc 9992 Edition 1)
Performance-based Navigation (PBN) Operational Approval Manual (ICAO Doc 9997 Edition 2).
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