Ships crossing the world's maritime chokepoints
The mean number of vessels a day crossing each of 28 straits and canals in the latest week IMF PortWatch has published, against the 90 days before (a sudden change) and the same weeks a year earlier (a moved level). These are measurements, not warnings: a flagged strait is unusual against its own record, and the count is of ships visible on AIS.
Chokepoints
Flagged first. "Sudden": |z| of at least 3.5 and a change of at least 25% against the 90 days before. "Level": a change of at least 25% against the same weeks a year earlier, outside that window's 5th to 95th percentile range. A baseline under 5 a day is too thin to flag.
| Chokepoint | Ships a day | vs 90 days | vs a year earlier | Tankers a day | Reading |
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Not built yet
Vessels loitering or going dark over Baltic cables and pipelines (open AIS), vessels on sanctions lists, port throughput, piracy. Nothing on this page comes from them.