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
Evidence
EVIDENCE: OBSERVED
Tempo
TEMPO: SHORT
Covers
2026-07 → 2026-08

We watched it happen: our own AIS receivers (via the aisstream.io terrestrial network), our timestamps, our archive.

The numbers · 2 rows

Periodmetres/month
2026-08645.2
2026-07326.4

Cite this

In print: Draught change worked at US gateways, per the Trimtab US Trade Ledger, an independent mirror of AISstream.io → own recorder (retrieved 2026-08-06) — trimtabist.com/series/tt001.us-gateways.cargo-worked
For the record: 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

This address is permanent. If this figure is revised or corrected, the change is printed here with its size.

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