Trimtabist
The US Trade Ledger — every US container gateway, every partner country, every month. Census-recorded, AIS-verified.
TT-001 · Gateway watch

Draught change worked at US gateways

tt001.us-gateways.cargo-worked observed

Total absolute draught change reported by merchant vessels while inside a US gateway, per month. A proxy for cargo worked: a ship that arrives deep and leaves shallow has discharged. It is a proxy and not a measurement — draught is crew-entered, so a ship that works cargo and never updates is missed. This undercounts and never invents.

Unit
metres/month
Grade
observed
Horizon
short
Covers
2026-07 → now

Own-recorded live from terrestrial AIS (aisstream.io receiver network); the recording, timestamps and event derivation are ours. Source: undefined.

The numbers · 2 rows

Periodmetres/month
2026-08645.2
2026-07326.4

Cite this

Trimtab TT-001 Gateway watch, "Draught change worked at US gateways" (retrieved 2026-08-06).
Trimtab TT-001 Gateway watch, own-recorded AIS static messages.
Licence CC BY 4.0

Machine readable

Updated: 2026-08-06 (regenerated on every request from the live registry)
/series/tt001.us-gateways.cargo-worked.csv — tidy long format
/series/tt001.us-gateways.cargo-worked.metadata.json — provenance, coverage, citation
POST /mcp — query_series, describe_series