bulwark, raised side wall of a ship
砰的一声巨响，一架梯子从外面撞上了舷墙。
With a loud bang, a ladder slammed into the ship’s bulwark from the outside.
我们有舷墙可以躲，你们只有栏杆。
We have a bulwark to hide behind; all you have is a railing.