Last Updated：2025/11/20

The nominal height of the surface of the oceans above which heights of geographical features and aircraft flight levels are measured.

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sea level

Source Word

sea level

countable uncountable

Japanese Meaning

海面水準 / 海面高度 / 海面基準面

Surveyors adjusted all elevation measurements relative to sea level to ensure consistency across maps and flight charts.

測量士は地図や航空チャートの整合性を保つため、すべての標高を平均海面を基準に調整した。

Sense（1）

sea levels

（ plural ）