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MHWS (Mean High Water Springs)

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MHWS (Mean High Water Springs) refers to the average highest level that spring tides reach, calculated over a long period. It represents the highest tide level during periods of greatest tidal range (new and full moons). This level is used in navigation charts to determine bridge clearances and coastal property lines.

Definition: The average of two successive high waters during 24-hour periods when the tidal range is at its maximum.

Significance: It indicates the average high-tide mark during spring tides, which happens approximately every 14 days.

Context: Unlike MHWN (Mean High Water Neaps) which represents lower high tides, MHWS shows the highest typical tidal extent.

Use Case: Mariners and coastal planners use MHWS for tidal height estimations, particularly for identifying areas regularly submerged by high water.