| 摘要 |
PURPOSE:To prevent occurrence of rolling by employing a recessed bottom penetrating in the longitudinal direction while employing the inner face and the outer sideface inclining outwardly thereby producing the lift. CONSTITUTION:The bottom face of hull 1 is recessed 2 while penetrating longitudinally where the recess has a mountain-type cross-section. The outside face 3 of hull and the inner face of recess 2 are inclined outwardly. The projected bottom sections at the left and right will produce the lift for preventing rolling of hull under sailing.
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