Quentinb (South Africa)
Anti Shark Surfboards
Was watching Discovery channel last night and again they showed surfers being attacked by sharks.

I don't know if something like this already exists as I am not a surfer, but I was thinking why not put something on the surfboard to warn the surfer that a large fish/shark is close or even better to repel the shark.

Some small sensor based thing with a rechargeable battery.

Reward: Whatever you feel like giving me, I really don't care. I am not a surfer so a device will not benefit me.

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