Portflow

Port Flow (portflow.uk) — Predictive tanker port-congestion and ETA dataset built on public AIS. Concretely: per-voyage predicted ETAs continuously refreshed for every trackable vessel (tanker, container, bulk, general, RoRo) approaching or anchoring at any of 51 digitised ports (including ARA, Hamburg, Algeciras, Fujairah, Singapore, Houston, Sabine Pass, Ras Laffan), scored against the crew-broadcast ETA with an open, published RMSE/MAE benchmark computed over exactly the same closed voyages for both series — the operator states the broadcast baseline excludes sentinel placeholder ETAs beyo…

Portflow offers (Alternative, Supply Chain, Price, Geospatial) — Compact, and the operator is explicit about how little history is kept. Live universe is 51 ports and 12-13 chokepoints, so per-closed-voyage records number in the low thousands per year. Published retention commitments cap the asset: 7 days of in-memory KPIs and SQLite storage with 90-day compaction, so recent detail is fine while older history is thinned. Position snapshots are written per vessel at a rate-limited cadence rather than full-resolution logging, and source AIS static messages arrive roughly every 6 minutes per vessel, so at best a partial position archive rather than a complete track history. Realistically megabytes to low gigabytes, with any deep-history claim explicitly unsupported..

Cargo-timing P&L for commodity traders, who use predicted ETA and congestion to price and position before the market moves; demurrage avoidance for charterers and forwarders who need to see a bottleneck days ahead and route around it; sanctions and dark-fleet exposure screening for P&I clubs and compliance teams that currently price that liability manually; delay attribution for contractual disputes. Two non-obvious buyer angles: (1) an evaluation corpus — the closed-voyage set of model-ETA, crew-ETA and actual-arrival triples is exactly the labelled benchmark an organisation building its own maritime ETA model needs, and a published open accuracy series is a rare independent yardstick for the whole category; (2) the hand-digitised geofence catalogue for 51 ports (berth, anchorage, channel polygons plus port centres) is reusable reference data that any vessel-geofencing product otherwise has to build by hand, port by port. Chokepoint transit-count and dwell series additionally serve as event inputs for freight and crude flow models.