This is a sole-source solicitation for the procurement of one SP245-05 software maintenance item from the OEM, Advanced Simulation Technologies Inc. The Naval Surface Warfare Center Dahlgren Division in Dahlgren, Virginia, requires the software to maintain compatibility with an existing system. The order will be issued on a firm fixed-price basis, and all shipping costs to Dahlgren, VA, must be included in the quoted price. Award will be made on a Lowest Price Technically Acceptable basis, and quotations will only be accepted from authorized resellers who provide a Letter of Authorization. The anticipated award date is by March 2026.