Ocean acoustic problems are very complicated by nature and require large scale computations. Recent computer technology advances have produced very fast, inexpensive pipelined array processors. These processors allow the efficient, cost effective solution of complicated problems. This presentation begins with a demonstration of a two‐dimensional model ocean acoustic long range propagation problem and discusses its solution on both a conventional sequential computer and a pipelined array processor. The next step of the application of multi‐array processors is presented. A three‐dimensional model ocean acoustics problem is chosen as a sample problem for such multiprocessors. [Work supported by ONR.]