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Types of Recreational Underwater Diving. Recreational diving or sport diving is a type of diving that uses SCUBA equipment for the purpose of leisure and enjoyment. There are many types of scuba diving and Philippines is blessed to have the great places for almost all of them. Cavern diving â diving within the entrance of a cave, where light is still visible.
Wet underwater welding. In âwetâ underwater welding, MMA, or manual arc welding is the most common method. This is a variation of shielded metal arc welding, which employs a waterproof electrode. The other common processes in use are friction welding and flux-cored arc welding.