The emergence of performance-based navigation (PBN) is having a major impact on all aspects of the aviation industry. However, inconsistencies with the aeronautical charts, the PBN operational approvals and the avionics displays have created confusion for pilots and air traffic controllers.

As a result, ICAO has decided to rationalize the chart-naming convention in order to remove the inconsistencies and align the aeronautical approach charts with the PBN operations approval. This will reduce the confusion and provide a simpler and clearer method for procedure naming and a standardized approach to aeronautical charting.

It will take time for States to convert all of their existing area navigation (RNAV) procedures to required navigation performance (RNP) in order to transition from the current naming convention to the new designation. States therefore need to develop a transition plan that addresses all stakeholder needs, issues and concerns. This circular provides the necessary guidance to States on how to make that transition.

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