With the exciting changes looming in the United States launch vehicle market, this is an appropriate time to examine the emerging needs of commercial crew and the evolution of range safety. This paper addresses the changing face of GN&C in the US Launch Vehicle Segment, addressing the impact of crewed vehicle operations on the architecture, systems and components of the Atlas and Delta launch vehicles, with special attention paid to those aspects driving evolution of the GN&C systems. It is also timely to address the integration of the GPS Metric Tracking effort into the fleet and assess the future impacts of this evolving system and the intersection with crewed launch vehicle operations. Consideration is also given to the evolving role of the FAA in launch vehicle operations and their intersection with fault tolerant GN&C. Given the increasing focus on affordability and the importance of maximizing the launch benefits, additional topics include the impacts of secondary mission's requirements on GN&C evolution. Finally, no assessment would be complete without touching on the challenges and opportunities afforded with the development of the SLS and reusable concepts like the fly-back booster efforts by the USAF and some of the new Launch Vehicle entrants.
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