Lockheed Martin Mission Systems and Sensors, Manassas, Virginia, is being awarded a $161,267,324 cost-plus-incentive-fee modification to previously awarded contract for Acoustic Rapid Commercial Off-The-Shelf Insertion (A-RCI) engineering services. This contract is being incrementally funded. The contract provides funding for the design and development of A-RCI and common acoustics processing for the United States submarine fleet and for foreign military sales. A-RCI is a sonar system that integrates and improves towed array, hull array, sphere array, and other ship sensor processing. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.