[eli5] How vessel tracking work ? Who provide the data to them ?
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There are many ways that vessel tracking companies collect data on ship movements. One common method is through the use of Automatic Identification System (AIS) data. AIS is a system that is required by most large commercial vessels to broadcast their position, course, and speed periodically. This data can be picked up by AIS receivers, which are then used to track ship movements. Other methods for collecting vessel tracking data include using satellite imagery, radar, and human observers.
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