Shark Shield (originally known as "Protective Oceanic Device" or simply "POD") is a portable electronic device that emits an electromagnetic field and is used by scuba divers, spearfishing, ocean kayak fishing and surfers to repel sharks.
The SHARK POD generates an electrical field that is detected by the shark through its sensory receptors, known as the Ampullae of Lorenzini, found on the snouts of all predator sharks.
Once detected by the sharks' sensors, the field causes muscular spasms that result in the shark being repelled from the area.
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