A usually triangular sail attached to the forestay or headstay of a sailboat.

一面通常是三角形的帆，安装在帆船的前桅支索或前支索上。

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This is popularly called sailing under “jib and jigger”—the jigger being an old square-rigger term for the aft-most mast flying a triangular sail.

这种航行法常被叫做“jib and jigger”——jigger是对于船尾桅杆上的三角帆的古老叫法。

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At the top of the sail is a short SPAR called the gaff, which allows the sail to extend back along a fourth side, gaining size over a triangular sail of the same height.

在帆面的上方是一根短的圆杆，称为斜桁(gaff)，使得帆面可以在第四条边上延长，因而比同等高度的三角帆面积更大。

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