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The automatic identification system (AIS) is an automatic tracking system that uses transponders on ships to track them and provide information about them.

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Free source of AIS data (API)

AIS data for the USA is available from https://marinecadastre.gov/ais/. I don't know about an API, but the site offers a variety of Arc Python-based tools that may lead you to a solution. …
Stu Smith's user avatar
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