An underwater diver is a skilled individual who is trained to explore and work beneath the surface of water bodies. This profession encompasses a range of activities, from scientific research to commercial operations such as salvage and construction. There are several synonyms for the term "underwater diver," including: scuba diver, dive specialist, deep-sea diver, commercial diver, technical diver, and saturation diver. Scuba diving involves the use of self-contained underwater breathing apparatus to explore and perform tasks underwater, while commercial divers are trained to execute underwater construction, maintenance, inspection, and repair work. Deep-sea divers are specially trained to explore depths of up to 300 meters. Technical divers and saturation divers undergo significant training and utilize specialized equipment to carry out complex underwater tasks.