This talk, presented at the ION GNSS+ 2025 conference, focuses on a Collins PNT architecture that addresses the communication and navigation needs of the NASA LunaNet program, a program conceived to enable manned exploration and base construction on the lunar surface. Speaker(s): Michael Armatys Room: Beems Auditorium A, Bldg: Downtown, Cedar Rapids Public Library, 450 Fifth Ave. SE, Cedar Rapids, Iowa, United States, 52401