Yes, it's one of the greatest innovations, I think, that we'll see, particularly as it pertains to safety, noise and carbon footprints.
RNP approaches are unique in many ways. The first thing is, of course, that it utilizes the satellite constellation, the navigation capability of the aircraft and the training of the pilots. There are no ground-based requirements whatsoever. It allows you to basically use different separation for terrain, and Calgary is quite unique. We actually have the first approaches in the world that have been qualified to do what's called RNP on arrival, which allows us to basically do the curved approaches and have reduced separation that way.
What it also allows us to do is either avoid terrain or avoid noise-sensitive areas. The benefit, of course, is that you not only are always in constant descent, which keeps the thrust back and the noise down, but you also can basically curve the path as required. Straight-in approaches are required when you have, say, ground-based navigation systems such as an ILS, an instrument landing system. The benefit of RNP is that we can tailor it uniquely to the situation that we're working in—the airport environment, the communities, etc.—while gaining greater efficiency and safety, and the smallest noise footprint possible.