Amphidromic points stay nearly tideless while coasts rise and fall
Ocean tides are not a simple global seesaw. Rotating amphidromic systems spin high and low water around nodes where tidal range shrinks toward zero.
Coasts far from those nodes can see multi-meter swings, while nearby amphidromic points barely wet a dock differently between hours.
Tide tables map spinning basins, not just the Moon overhead. Where the amphidromic calm sits, the ocean’s pulse nearly vanishes even as shores elsewhere flood.
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