Dry welding is a specialized technique used to repair underwater structures without the need for a wet environment. This method involves creating a dry chamber around the area to be welded, allowing welders to work in a controlled atmosphere. It is particularly useful for fixing oil rigs, pipelines, and other marine installations. The process typically employs a combination of pressurized air and sealing materials to keep water out. Dry welding is advantageous because it maintains the integrity of the weld and reduces the risk of contamination, which can occur in traditional underwater welding methods.