The research on the coverage area of multistatic sonar under various work modes

Absorption loss, which is an important characteristic in the field of underwater acoustic, caused by sea water is often neglected in the research on the coverage area of bistatic sonar. In this article, the coverage area of bistatic sonar considering absorption loss is studied. The change of coverage area caused by absorption loss and the approximation are discussed. When multistatic sonar works in different modes, detection criterion varies, and the coverage area cannot be simply considered as the union set or the intersection of coverage area of each bistatic sonar unit. The definition of multistatic coverage area is discussed, and the coverage area respect to the most relaxed criterion and the strictest criterion is studied.