The Department of Defense, specifically the U.S. Marine Corps, is seeking information from vendors for the MARNAV Block 2 project, which focuses on advanced Positioning, Navigation, and Timing (PNT) solutions as replacements for the Defense Advanced GPS Receiver (DAGR). This Request for Information (RFI) aims to gather insights on potential commercial sources and is intended to shape future acquisition strategies while enhancing PNT capabilities through the use of Military Code (M-Code) GPS satellite signals and alternative sensors. Interested vendors are invited to participate in Vendor Demonstrations scheduled from February to May 2025, where they can showcase direct, drop-in alternatives to the DAGR. Vendors must submit their company information by May 15, 2025, to coordinate their demonstrations, and the acquisition strategy is expected to lead to a full and open competition for an Indefinite Delivery, Indefinite Quantity (IDIQ) contract. For further inquiries, vendors can contact Valeria Page at valeria.page@usmc.mil or 703-432-8739, or Leigh Anne Romo at leigh.a.romo.civ@usmc.mil.