FIELD: lake fish culture. SUBSTANCE: invention can be used for ripping lacustrine deposits in natural reservoirs. Proposed ripper consists of two self- propelled vessels with leader line featuring positive buoyancy secured between vessels. Guide with rippers are connected to leader line parallel to each other. Rippers are made in form of flat triangular metal bases with teeth at both sides to provide ripping irrespective of side of dipping into water. EFFECT: improved cleaning of water reservoirs. 2 dwg
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