有了脚本，船壳、鳍龙骨和艇舵就像三种外观一样可以被设计出来。

With it, a hull, fin keel and a rudder, as the three surfaces can be designed.

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帆船有许多种不同类型的固定龙骨，例如全龙骨(见上图)及鳍板。

Sailboats have many different types of fixed keels, such as full keels (see photo) and fin keels.

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龙骨，小鳍和盔甲帮助引导水流流过身体表面，他们用这种方式来降低水的阻力（看图示）。

The keels, finlets, and corselet help direct the flow of water over the body surface in such as way as to reduce resistance (see the figure).

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