Divers Supply Indy What Kind Of Air Supply Is This Diver Using ? How Come He Does Not Have A Regulator Mouth Piece ?

What kind of air supply is this diver using ? How come he does not have a regulator mouth piece ? - divers supply indy

I have this picture of my philiphine friend who said it was a fisher of pearls and I represent one of those photos of him diving by e-mail. Now I know that all diving equipment air, must be a spokesperson, the regulator, but as he did not endorse? What kind of diving air supply system is used?

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