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Median absolute proportional change when a containerised-weight figure is restated. Answers how big a typical restatement is, not merely how often one happens. A source that revises often but trivially is different from one that revises rarely but by a third.
STATUS: WITHDRAWN · SINCE 1970-01 · RETURNS WHEN THE CONDITION BELOW IS MET
NO OBSERVATIONS YET. The archive holds 20,618 entries and every one is a `backfill` — our own air_weight_kg column arriving for the first time — with zero genuine restatements. A revision can only be observed by re-fetching a month we already hold and finding it changed, and until 2026-07-30 nothing did that: the weekly timer ran a superseded collector that crashed against the migrated schema. It now re-syncs the last six months every Friday. Lift when the archive holds genuine `revision` or `withdrawn` entries across at least a few distinct months — not on the first one, which could be a one-off. We will not serve data we cannot stand behind, so this page stays up but the numbers do not.
More on the practice: withdrawn data.
We watched it happen: our own AIS receivers (via the aisstream.io terrestrial network), our timestamps, our archive.
This address is permanent. If this figure is revised or corrected, the change is printed here with its size.
query_series, describe_series