Underwater welding is a unique job skill requiring intensive and specific job training, so prospective workers' classes prepare them for potentially hazardous working conditions involved in repairing underwater structures. Classes cover commercial diving techniques, cutting, welding and underwater safety procedures, Holland College reports. Students also learn to perform other diving tasks, including underwater repair work or construction, as welding alone generally does not produce enough work to make a living, notes the College Foundation of North Carolina.

Diving

Students must first gain experience as a diver before beginning their career as an underwater welder. The American Welding Society recommends attending a recognized diving school for approximately two years to ensure a safe and thorough diving education. Students learn to safely dive to different depths, according to Holland College. Underwater welding classes cover the physics and physiology of diving, decompression and emergency management techniques, CDA Technical Institute reports.

Equipment

Students learn to operate underwater welding and cutting machinery and equipment during training classes. Prospective underwater welders work with industry experts as they practice using equipment in different environment, such as in low visibility conditions or very deep water. Students learn to use hand and power tools, rigging equipment and even underwater explosives, according to CDA Technical Institute.

Safety and Technique

Underwater welding training prepares students to weld during courses covering safe underwater welding procedures and techniques, according to the CDA Technical Institute. Cutting and welding underwater are generally the main focus of classes, Divers Academy International reports. However, students also learn to safely use explosives or other related equipment that might be needed during underwater work.

Real-World Simulations

Underwater welding classes generally require students learn the skills to handle the rigorous job conditions of underwater welding by simulating long work hours. Many schools include physical strength and endurance training into their programs, CDA Technical Institute reports. Most schools require an intensive and extensive training period to ensure students are prepared to handle unforeseen complications or difficult working conditions, Divers Academy International states.