Question
Shipping containers are tracked using GPS or satellite devices attached to the container or its cargo. The tracker sends location data to a cloud platform every few minutes. Some carriers also use RFID tags scanned at port gates. Each container has a unique 11-character ISO identifier code for global tracking.
Did you know?
Modern tracking systems can monitor far more than location. Some units also record door openings, temperature changes, vibration and other events during transit. 
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