These are things you learn by doing in-depth analysis of AIS and related data sources. As far as I know, no one writes about it. Physical world data sources are full of interesting patterns and anomalies. Few people ever look because the data sources are challenging to work with and very different from Internet data, which is the only kind of data most people are used to.

Much of this kind of thing is written up in pretty terribly-written documents that come from government/law enforcement. Here's [0] a report I helped to put together which circles around some of these issues.

[0]: https://ocean.csis.org/spotlights/illuminating-the-south-chi...