Abstract: An offshore reef assembly includes semi-cylindrical reef members extending generally perpendicular to the shore line and arranged in upper and lower tiers so that the open side of the upper tier faces downwardly and the open side of the lower tier faces upwardly. The semi-cylindrical members in the upper tier are offset from those of the lower tier to divide and deflect vertically moving water laterally through an ogee curvature from one reef member to a laterally offset and inverted reef member, thus dividing and dissipating the kinetic energy of the water to cause the deposition of sand and particulates on the bottom around the reef assembly. The reef assembly is inexpensive both to construct and install.

Abstract: An offshore reef assembly having rows of reef members of concrete or similar material with the configuration of each of the reef members providing inclined side faces arranged in grooves and ribs. The reef members may be formed by stacking blocks in the form of frustums of pyramids or cones. The interaction of the inclined side faces of the adjacent reef members with the vertically moving water caused by waves dissipates kinetic energy of the water and results in the deposition of sand and particulates on the bottom around the reef assembly.