The Department of the Navy, Naval Information Warfare Center Pacific (NIWC Pacific) hereby publicizes its intention to solicit, negotiate, and award an Indefinite Delivery/Indefinite Quantity (IDIQ) contract on a non-competitive basis to W.S. Darley and Co. (CAGE Code 15852) located at 325 Spring Lake Drive, Itasca, IL 60143-2072. The requirement is for the purchase of Nautical Control Solutions (NCS) FuelTrax Portable Measurement Units (PMUs) supporting the Marine Corps with a system to monitor fuel in near real-time, enabling better-informed decisions in contested and austere environments. Based on the approved Justification and Approval (JA), the agency has identified only one responsible source and no other supplier will satisfy agency requirements. The applicable NAICS code is 334514, Totalizing Fluid Meter and Counting Device Manufacturing and the business size standard is 850 employees. This notice is not a request for competitive quotes; however, interested parties may identify their interest and capabilities in response to this notice, and must clearly show the ability of the firm to be responsive without compromising quality, accuracy, and reliability. Capability statements, comments, questions, or concerns regarding this notice shall be submitted via e-mail. A determination by the Government not to compete the requirement based on responses to this notice is solely within the discretion of the Government. All responding vendors must be registered to the System for Award Management (SAM). Information can be found at https://www.sam.gov. Complete SAM registration means a registered UEI and CAGE Code. It is the responsibility of interested vendors to monitor https://sam.gov for any amendments, which may be issued to this announcement. To respond to this announcement, any comments, questions or concerns may be submitted via e-mail to trinity.l.anglo.civ@us.navy.mil by 4 March 2026 at 1100 Pacific. In your inquiry, please reference N66001-26-R-0035 in the subject line. Questions by phone or fax will not be considered. Be advised that the aforementioned information is anticipatory in nature and is not binding.