FIELD: shipbuilding; construction of singlehulled ships; performing drilling and production work. SUBSTANCE: hull includes at least one open trunk running through hull for admitting water flow. At least one wall of trunk includes members for entrapping water flow with convexity or projection extending outside; wall has narrowing section of trunk and hollow spaces for entrapping water flow and communicating with hollow space of trunk through holes. Outer side of hull has longitudinal convexity or longitudinal projection extending horizontally outside and located below waterline. EFFECT: reduced heaving motion in conducting drilling or production work. 11 cl, 7 dwg
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