Own AIS receivers at eight US container gateways. Every berthing, anchoring and departure as the radio saw it.
Anchorage wait before berthing — SUPERSEDED. Computed from the crew-set NavigationalStatus field and the old event state machine, both disproven 2026-07-30: the status field recorded 153 anchor events against 3,273 berth events because crews rarely set it, and the state machine split single calls into fragments on speed noise. Replaced by position-based detection in berthing.db — see tt001.gateway.* and berthing/METHOD.md.
· from 1970-01-01, open-ended
Berthings per day at US gateways — SUPERSEDED. Computed from the crew-set NavigationalStatus field and the old event state machine, both disproven 2026-07-30: the status field recorded 153 anchor events against 3,273 berth events because crews rarely set it, and the state machine split single calls into fragments on speed noise. Replaced by position-based detection in berthing.db — see tt001.gateway.* and berthing/METHOD.md.
· from 1970-01-01, open-ended
Median berth stay at US gateways — SUPERSEDED. Computed from the crew-set NavigationalStatus field and the old event state machine, both disproven 2026-07-30: the status field recorded 153 anchor events against 3,273 berth events because crews rarely set it, and the state machine split single calls into fragments on speed noise. Replaced by position-based detection in berthing.db — see tt001.gateway.* and berthing/METHOD.md.
· from 1970-01-01, open-ended
Their pages stay up and their data is not served. A correction is worth publishing.
Source: AISstream.io → own recorder. The full method — what is measured, what is inferred, and what can mislead — is published as TT-001 method.
describe_series, query_series, check_agreementtrimtab://method/TT-001