Kathmandu airport implements new RNP AR procedures by NAVBLUE
Surrounded by mountains with a very challenging operating environment, Required Navigation Performance with Authorisation Required (RNP AR), a Performance Based Navigation (PBN) navigation specification, is the ideal solution for this type of airport. RNP AR allows navigation accuracy down to 0.3NM and below, and performing turns after the final approach point: trajectories can fit better in the obstacle landscape, reducing minimas whilst maintaining safety.
Source: timesaerospace.aero