The utility model refers to protective devices for protection of water areas from unauthorized penetration of small-sized water and submarine water crafts of small displacement of swimmers, etc. The technical problem, the solution of which is ensured by using the proposed design, is the possibility of unauthorized overcoming of the barrage network. In order to solve this technical problem, the underwater and above-water parts of the barrier are equipped with signaling means in the bon-zone boom, in contrast to the prototype. Thus, the underwater barrier network is made of cables of the detection device for detecting an interruption principle of operation, and the above-ground fence contains several levels of cables of the signaling means for detecting an interruption principle of operation. Additionally,
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