The Department of Defense, specifically the Department of the Navy, is seeking information regarding the Over-the-Horizon Sensor (OTH-S) as part of a Request for Information (RFI) issued by the Program Executive Officer Land Systems (PEO LS) Program Manager Intelligence and Cyberspace Operations (PM ICO). The objective of this RFI is to gather insights on advanced stage Technology Readiness Level (TRL) OTH-S technologies that can provide Maritime Domain Awareness (MDA) and Intelligence, Surveillance, and Reconnaissance (ISR) capabilities, particularly for detecting adversary surface targets at extended ranges. This initiative is crucial for enhancing the Marine Corps' operational capabilities without reliance on national or theater assets. Interested parties are encouraged to submit detailed responses showcasing their capabilities, with specific submission instructions outlined in the attached documents. For further inquiries, respondents may contact Brittney Moore at brittney.moore@usmc.mil or Morgan Carey at morgan.carey@usmc.mil.