This is a market research notice for the procurement of the AN/APN-241 Low Power Color Radar Electrical Equipment Mounting Base for C-130 aircraft. The government intends to award a sole-source contract to the original equipment manufacturer, Northrop Grumman Services Corporation, as proprietary data rights are held exclusively by them and their vendors. Other interested parties must identify their interest and capability by 26 December 2025. The notice clarifies this is not a formal solicitation or request for proposal. No budget, performance location, or sample availability is specified.