Dynamic simulation by digital computer of undersea towed systems

A three dimensional dynamic simulation of an underwater towed system has been developed which can be used to address many of the important questions connected with the deployment and towing of underwater sonar devices. Evolving from an original analog computer simulation, it exists now in digital computer form and provides the flexibility needed for model expansion and portability of analysis. Data from the performance studies of two basic types of towed sonar systems (variable depth and linear array) are presented to demonstrate the usefulness of and the range of information available from the simulation prior to the conduct of sea trials, and the correlation that is possible between predictive computer data and trials data after the conduct of sea trials.