[covert]

The theory behind the attraction as far as i understand works like this.

Sharks have receptors that can pickup minute electronic signals. a sixth sense if you will. Apparently this is so sensative they can pickup the movement of blood through your organs.

So the theory goes that if you throw a device in the water that generates allot of current, the shark will pick this up where it would normally just swim past if it could not see or smell you. The current interests the shark and it comes in close to investigate. Then obviously it enters the radius of the shield and then gets scared off.

Well in theory at least.