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An '''electromagnetic tracking system''' is a system that tracks an object in a three-dimensional space using electromagnets. It is also called a magnetic tracking system.
+An '''electromagnetic tracking system''' is a system that tracks an object in a three-dimensional space using [[electromagnet]]s. It is also called a magnetic tracking system.
Electromagnetic tracking systems must be calibrated before they can be used.
Electromagnetic tracking systems must be calibrated before they can be used.