Plain English Meaning
A very precise GPS-based approach that an operator and crew must be specifically approved to fly. The aircraft must have the right equipment, the pilots must have the right training, and the operation must hold a written authorization from the FAA.
Full Definition
A high-precision category of RNP instrument approach procedure that requires special aircraft equipment, specific aircrew training, and explicit operational authorization from the FAA before it may be flown. RNP AR procedures use lateral accuracy values as low as 0.10 NM on final and 1.00 NM on , may include (RF) curved path segments, and are designed for use in -challenged or -rich environments where conventional are not feasible.