The Department of Defense, specifically the Department of the Army, is announcing an opportunity related to the Next Generation Mounted APNT Capability (NorthStar) program, seeking white papers from vendors under an Other Transaction Authority (OTA) contract. This initiative aims to enhance Positioning, Navigation, and Timing (PNT) capabilities in response to emerging adversarial GPS challenges, following previous requests for information that indicated a mature technology readiness level for PNT solutions. Interested vendors are required to submit a security questionnaire to access updated documentation, with a submission deadline of February 28, 2025; it is important to note that this announcement is for informational purposes only and does not constitute a formal solicitation. For further inquiries, vendors can contact Tom Korzon at thomas.w.korzon.mil@army.mil or Corrie James at corrie.l.james.ctr@army.mil.