AIS-gap dark-fleet event dataset

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AIS-gap dark-fleet event dataset: hourly polls of every oil tanker and LNG carrier broadcasting AIS inside monitored energy-port zones, differenced poll-to-poll so that a vessel present in one poll and absent in the next without a logged departure becomes a timestamped dark-vessel event. Each event carries MMSI and vessel identity, port zone, last-seen timestamp, last-known speed and movement state (at anchor / underway), AIS identity-quality grade, port sanctions-risk tier per zone, and a 0-10 composite sanctions-risk score built from port risk, last-contact behaviour and identity quality. Latent value: an hourly vessel-presence panel across a curated port set (Ras Tanura, Singapore, Houston, Sabine Pass) plus the scored gap-event log — a labelled sanctions-evasion event series, not a raw AIS dump. Adjacent byproduct series on the same domain: a Hormuz chokepoint page, a crude-flow page, a signal feed and a live Persian Gulf vessel map.