Submerged breakwater is an off shore breakwater, with its crest at or below the SWL, used for creation of protected area of water or for protection of coastal structures and beaches from damage of erosion caused by wave action. Reef breakwaters are coast parallel structures built with an objective of reducing the wave action on the beach by forcing wave breaking over the reef. The present work involves the experimental study on submerged breakwater made of concrete cube armour of varying sizes. A stable trapezoidal submerges breakwater having a slope of 1V:1.75H with a crest width (B) of...