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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.
Types of underwater welding. 1  Pressure welding: the work is done by the welder in a pressure vessel measuring 1 atmospheric unit of pressure. 2  Habitat welding: Chamber in used in ambient pressure ,approximately the size of a small room to weld. Before entering, the chamber displaces its water into ocean or lake. more information...