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。
The plan, methods and principle of azimuth survey was introduced for Urumqi geomagnetic station marker.
介绍了乌鲁木齐地磁台测量标志方位角的方案、测量方法、原理。
The plan, methods and principle of azimuth survey was introduced for Urumqi geomagnetic station marker.
介绍了乌鲁木齐地磁台测量标志方位角的方案、测量方法、原理。
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