[3-LEG] Shipping chokepoint chain, one chokepoint or port (?loc=malacca): leading sea state and wind against operating thresholds -> current wave decomposition, local storm against distant swell -> realized AIS transit throughput (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: IMF PortWatch, NOAA, Open-Meteo Marine. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call.

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