如果需要，添加其他的基准线和标记也很方便。
If necessary, you can easily add extra guidelines and labels by dividing by other values.
澳大利亚海军已经派遣一架皇家空军C - 130大力神号飞机在该区域投下基准标记浮标。
RAAF C-130 Hercules aircraft has been tasked by RCC Australia to drop datum marker buoys.
确认完成后将基准标记去掉。
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