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Cornelia Windiate by Thunder Bay National Marine Sanctuary on Sketchfab

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From its humble beginning in 1994 to today, the group of training agencies Scuba Diving International (SDI), Technical Diving International (TDI), and Emergency Response Diving International (ERDI) form one of the largest diving certification agencies in the World – International Training.

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When making your mask, the manufacturer sprays the mold for the mask skirt with what is known as a releasing agent. This helps prevent the skirt from tearing when removed from the mold. The problem is, despite the manufacturer’s best efforts to prevent it, some […]

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