“…Recently, box-type floating breakwaters have been constructed in many sea areas because of their simple structure. Ohkusu et al (1991) investigated the performance of a floating breakwater utilizing inside water and concluded that the proper mode of water behavior could effectively reduce transmitted waves. Mcdougal and Williams (1996) analyzed the behavior of a submerged moored breakwater of rectangular cross section and reported the surge, heave, and pitch responses of the structure.…”