PBN aims to make certain worldwide standardisation of RNAV and RNP specs and to limit the proliferation of navigation technical specs in use world-wide.Angular techniques, while more exact, do call for SBAS and that is both equally a gain but also an additional limitation for us.Hồ Kym Thanh Hương Bình Lưu Luyến Hoàng Oanh PBN seventy seve