its not necessary.
I've had three encounters with white sharks while kayaking. one, just as big as the PA, was within arms reach In La Jolla.
its the ones you don't see you should be aware of. and they don't care about any shark shield.
out here, if you don't want to see the sharks, kill and bleed out a blacktip. but know there are bigger sharks looking for that blacktip.
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MLPA- My Largest Poaching Area
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