This is an unrestricted, full-and-open RFP to establish a Multiple Award Task Order Contract (MATOC). The objective is to augment ERDC’s ship simulation capabilities with specialized, independent maritime simulation and engineering support for technically rigorous, time-sensitive USACE navigation challenges. Contractors will independently execute designated simulation tasks, conduct technical analyses, and deliver finalized engineering reports under individual task orders, leveraging external maritime expertise. The ordering period is a 24-month base period plus three 12-month option periods, for a potential total of 60 months. Navigation study services not directly connected with project maintenance and operations are considered commercial activities and not inherently governmental under 33 U.S.C. 2321(b).