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October 2013    Download the Entire Issue (PDF) Vol. 28, No. 10   RSS Feed for Undercurrent Issues
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When Shark Shields and Great Whites Collide

from the October, 2013 issue of Undercurrent   Subscribe Now

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After a spate of shark attacks in the New South Wales region of Australia a few years ago, sales of the electronic repellant device known as Shark Shield skyrocketed all over Australia ( they're sold online at www.sharkshield.com ). Shark Shields generates an electrical field, or a "shark-safe zone," 25 feet in diameter around the diver. Electrodes generate a pulsing sensation detected by the shark through its sensory receptors, and create muscular spasms that send the shark fleeing but cause no lasting effect. The latest iteration is Shark Shield Freedom7, which differs from previous models in that the electrodes trail behind the leg of the diver, instead of one electrode placed on the tank and the other on the diver's ankle. As a result, the electric field source of is located behind the diver instead of being centered on him....


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