Geometric approach for RNP transition to xLS procedure design

The required navigation performance (RNP) transition to a xLS (ILS/GLS) is expected to be a near future flight procedure to reduce flight time and fuel burn, and enable precision approach. However, for the development of this new procedure design criteria, there are some problems regarding the transition from RNP segment to the xLS precision approach segment. This paper reveals the requirements to allow an aircraft to smoothly fly on the intended path including the transition. Based on the obtained requirements, a full-flight simulator experiment was conducted, and the requirements were proven to be appropriate. Finally, based on these requirements, the RNP transition to xLS flight procedures design criteria was developed to enable a procedure designer to design a flyable RNP transition to xLS procedure.