The FAA plans to transition the U.S. National Airspace System (NAS) navigation infrastructure to enable performance-based navigation (PBN) as part of the Next Generation Air Transportation System (NextGen). The FAA plans to transition from defining airways, routes and procedures using VHF Omni-directional Range (VOR) and other legacy navigation aids towards a NAS based on Area Navigation (RNAV) everywhere and Required Navigation Performance (RNP) where ben-eficial. Such capabilities will be enabled largely by the Global Positioning System (GPS) and its augmentations such as the Wide Area Augmentation System (WAAS) and Ground Based Aug-mentation System (GBAS). As a result of this transition, the need for ground-based navigation services will diminish, and the number of federally provided ground-based facilities will be re-duced accordingly, but with sufficient time for users to equip with SATNAV avionics.

Type of Operation Guidance Materials Overview Presentations Approval Mechanism Additional Information
GLS Ground Based Augmenta-tion System (GBAS) Landing System AC-120-29A   OPSEC / MSPEC / LOA Guidance C052 Engineering Development Services Group LAAS
FAA GBAS

NAS RNP Resource Guide (PDF)
RNAV Visual Flight Procedure Order 8260.55 RVFP (SWF)   NAS RNP Resource Guide (PDF)
RNAV Systems on Conventional Routes AC 90-108   OPSPEC / MSPEC / LOA guidance B034 NAS RNP Resource Guide (PDF)
B-RNAV and P-RNAV AC 90-96A   OPSPEC / MSPEC / LOA guidance B034 NAS RNP Resource Guide (PDF)

Navigation Programs – Satellite Navigation