Underwater welding is a specialized technique used to join metal parts while submerged in water. This process is essential for repairing ships, pipelines, and offshore structures. It combines traditional welding methods with the unique challenges of working underwater, such as pressure and visibility. There are two main types of underwater welding: wet welding and dry welding. Wet welding involves using a waterproof electrode directly in the water, while dry welding takes place in a controlled environment, often using a chamber to keep water out. Both methods require skilled welders who are trained in both welding and scuba diving safety.