Underwater construction involves building and repairing structures beneath the water's surface. This field is essential for creating and maintaining bridges, dams, and pipelines, as well as for underwater habitats and marine research facilities. Specialized equipment and techniques, such as diving and remotely operated vehicles (ROVs), are used to perform these tasks safely and effectively. The process requires skilled professionals, including divers, marine engineers, and construction workers, who are trained to work in challenging underwater environments. Safety is a top priority, as workers must manage risks like strong currents, low visibility, and pressure changes while ensuring the integrity of the structures being built or repaired.