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。
Each section's marker and heading form one line .
每个章节的标记与标题独为一行。
Each section's marker and heading form one line .
每个章节的标记与标题独为一行。
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