Signal tag detection components, devices, and systems

A system comprising:

• a) a tag, said tag comprising a radio-frequency identification (RFID) chip, wherein said tag emits a sideband at a defined frequency upon activation by a magnetic field;
• b) a component that is attachable to a medical device, wherein said component comprises:
• i) at least two medical device location emitters, and
• ii) an indicator comprising a visual display that presents distance to tag information, and spatial orientation, for said medical device;
• c) a remote activation device that generates a magnetic field within a region of the tag and the at least two medical device location emitters;
• and
• d) a plurality of witness stations, each said witness station comprising an antenna configured to detect said sideband:
• i) emitted from said tag or changes in a magnetic field generated by said remote activating device in response to said tag;
• and
• ii) emitted from said at least two medical device location emitters or changes in the magnetic field generated by said remote activation device in response to said at least two medical location device emitters.