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。
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。
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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