Pivoting on a pin inside the hull, it swings down to provide ballast and resistance against sideways motion of the boat caused by the wind blowing from one side.
它围绕船底的一个钉子旋转，放下时提供压载力，以抵抗由于单侧风导致的船只侧向摆动。
2
It also explores concepts of intact and damaged stability, hull structure strength calculations and ship resistance.
本课程还对完整及破舱稳定性、船体结构强度计算和船舶阻力的概念给予介绍。
3
In designing the hull form, the main point is the influence of ship type change on resistance and lines optimization.