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Notice of proposed rulemaking (NPRM).
This action proposes to establish six low altitude United States Area Navigation (RNAV) routes (T-routes) in support of the VHF Omnidirectional Range (VOR) Minimum Operational Network (MON) Program. The purpose is to enhance the efficiency of the National Airspace System (NAS) by transitioning from a ground-based to a satellite-based navigation system.