The Department of Defense, through the Army Combat Capabilities Development Command (DEVCOM) C5ISR Center, is issuing a Request for Information (RFI) focused on Navigation Warfare (NAVWAR) Electromagnetic Support. This RFI aims to identify advanced techniques and technologies that enhance navigation warfare capabilities in a complex, multi-domain battlefield environment, specifically targeting systems at Technology Readiness Level (TRL) 4 and above that utilize radio frequency (RF) techniques for detecting and protecting positioning, navigation, and timing (PNT) systems. The insights gathered will inform future research and development efforts, emphasizing the importance of robust NAVWAR capabilities in modern military operations. Interested parties are encouraged to submit their responses, which may include classified information, to the designated email address by the revised closing date of December 15, 2024. For further inquiries, contact the C5ISR Center Strategic Engagements Team at usarmy.apg.devcom-c5isr.mbx.rti-industry-engagement@army.mil.