What it is
RFID, radio-frequency identification, uses tags that readers detect wirelessly. Passive tags need no battery, while active tags carry their own power for longer range.
How it works in logistics
Readers at gates and in yards identify containers and assets instantly, allowing bulk inventory checks without line of sight to each item.
Where it fits
RFID suits terminals, yards and warehouses, complementing GPS tracking by providing identity at checkpoints rather than continuous location.