The Department of the Navy intends to award a non-competitive, sole-source IDIQ contract to W.S. Darley and Co. for the purchase of Nautical Control Solutions FuelTrax Portable Measurement Units to monitor fuel for the Marine Corps. The agency has determined there is only one responsible source to satisfy its requirements. Interested parties may submit capability statements via email to demonstrate their ability to meet the requirement, though the Government's decision not to compete is discretionary. All responding vendors must be registered in the System for Award Management (SAM).