The Department of the Navy’s Naval Surface Warfare Center Carderock Division seeks the Environmental and Ship Motion Forecasting Follow-On program under a full and open competition. The Government intends to award one single-award, Cost-Plus-Fixed-Fee, indefinite-delivery/indefinite-quantity contract with a five-year ordering period. Attachments 01–06 are Distribution D and available only to DoD and U.S. DoD contractors with active SAM.gov registration and verified Joint Certification Program certification supported by an approved DD Form 2345. Prospective offerors must request those attachments by email from Joseph Estrella, copying Michael L. Jones and William Finke, and include the company CAGE Code and required subject line. Questions must be submitted through the PIEE Question and Answer Solicitation Module no later than 10 calendar days after solicitation issuance, and vendors should follow PIEE vendor access instructions for registration and access.