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On some charts you can find the following abbreviations: "RNP AR APCH". What does "AR" mean?
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RNP AR APCH is similar to RNP APCH and is used for approaches where greater accuracy for obstacle clearance and a specific operational approval is required. This includes aircraft meeting functionality and performance requirements, crew training and verification of database integrity and operational procedure.

RNP AR APCH can be used to increase safety and access where conventional approaches cannot be aligned to the runway, to improve safety and increase access in mountainous terrain and congested airspace .
The “AR” stands for “Authorization Required”.

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