FIELD: floating lifting facilities used for hoisting, mounting and transfer jobs.
SUBSTANCE: lifting facility includes floating base (ship's hull) carrying several derricks mounted on swivel pillars balanced by means of externally-mounted varying counter-weights suspended from auxiliary derricks lifting the large-sized cargo during joint operation in synchronism; distance between points of suspension of cargo may be changed depending on length and distribution of mass of large-sized cargo being lifted; they move on carriages over rails mounted on keel piece along ship's hull; they may be stowed in transportation position.
EFFECT: extended technical capabilities.
5 cl, 4 dwg
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