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单词 Lowest Astronomical Tide
释义

Lowest Astronomical Tide

英语百科

Chart datum

US civil and maritime uses of tidal data

A chart datum is the level of water that charted depths displayed on a nautical chart are measured from. A chart datum is generally a tidal datum; that is, a datum derived from some phase of the tide. Common chart datums are lowest astronomical tide and mean lower low water.

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更新时间:2025/6/22 2:18:06