Selected heading. A heading marker, located adjacent to and read against the outer edge of the azimuth dial, indicates the selected heading.

临近方位标度盘有一个方向标志，需要对着方位标度盘外部边缘来读取所指示的选定航向。

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Dr. Dial says some of his most important observations have been made watching a bird glide by while he is fly fishing, and then heading back to the lab with a new theory to test.

戴尔表示，一些最重要的观测结果是他在飞蝇钓时通过观察鸟类滑翔得到的，因此，当钓鱼活动结束后，他就带着要试验的新理论返回实验室了。

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