FIELD: shipbuilding. SUBSTANCE: device has fore and aft envelopes provided with jackets for putting them on extremities of lighter. Fore envelope gas hole in the bow and is provided with attachment unit in form of flexible capron tapes connected to the towing rope. The hole in fore envelope is formed by the ring to which four flexible couplings are connected; two flexible couplings are made in form of set of buoyancies strung on capron halyards belayed on bits and other two are made in form of metal chains belayed on other bits by means of rope shots. Jacket of aft envelope is put on the aft extremity of lighter and is secured by means of rope shots belayed on bits and capron halyards belayed on other bits. Buoyancies are strung on halyards. Aft envelope is provided with intake holes formed by pockets. EFFECT: enhanced reliability. 3 dwg
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