An article on the Windward website on 20th November discusses the central role the Automatic identification System (AIS) plays in tracking ship movements. It looks at AIS Transmission Gaps, a period of time during which a vessel‘s movements are unknown, and explains the 2 types of gaps – AIS Lost Signal and Dark Activity – and why only one of these constitutes a red flag. Subsequent Parts 2 and 3 of the series of articles will cover how to quickly filter out these false red flags during vessel screening, and how to then investigate the high-risk gaps for potential illicit activity. The article helpfully starts by explaining how AIS works, then what causes transmission gaps.
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