A commercial diver is a professional who performs underwater tasks for various industries, including construction, maintenance, and inspection. They often work in environments such as oceans, rivers, and lakes, using specialized equipment to ensure safety and efficiency. Their tasks may include repairing underwater structures, conducting surveys, or installing equipment. To become a commercial diver, individuals typically undergo training and certification programs that teach them diving techniques, safety protocols, and the use of diving gear. They may also need to learn about underwater welding, underwater photography, or marine biology, depending on their specific job requirements.