Abstract: A wave-absorbing breakwater is a structure assembled of prefabricated blocks of concrete (or some other material) resting upon immovable bottom supports and having a sloping jumping-off site undercutting a wave, separating it from the water surface and guiding it onto a sloping superstructure made of blocks with through catch drains therein, where the energy of the waves is either dissipated or, if needed, utilized by means of conversion into another kind of energy.