1. Commercial Diving: Commercial divers are employed in a range of industries such as construction, oil and gas, marine salvage, underwater welding, and maintenance. They perform tasks such as underwater welding and cutting, inspection and maintenance of structures, installation of underwater equipment, and underwater construction.

2. Offshore Diving: Offshore diving involves working in the offshore oil and gas industry. Divers may be responsible for inspection and maintenance of offshore platforms, pipelines, and underwater structures. They may also assist with underwater construction and installation of equipment.

3. Scientific Diving: Scientific divers work in the field of marine research and study. They collect data, perform experiments, and carry out underwater research activities to study marine ecosystems, marine life, and underwater geological formations. They may also assist with the installation and maintenance of scientific instruments and equipment.

4. Military Diving: Military divers are trained to perform various underwater tasks in support of military operations. They may be involved in activities such as underwater reconnaissance, explosive ordnance disposal (EOD), salvage operations, and underwater construction.

5. Underwater Welding and Cutting: Underwater welders and cutters perform welding and cutting operations in underwater environments. They use specialized equipment and techniques to repair and maintain underwater structures such as pipelines, offshore platforms, and ships.

6. Underwater Inspection and Surveys: Divers conduct visual inspections and surveys of underwater structures, ships, and pipelines to assess their condition, identify potential issues, and collect data. They may use cameras, sonar, and other equipment to document and report their findings.

7. Search and Rescue Diving: Search and rescue divers are trained to locate and rescue individuals who are submerged or trapped underwater. They work closely with rescue teams and use specialized techniques and equipment to perform underwater search and recovery operations.

8. Underwater Photography and Filming: Underwater photographers and cinematographers capture images and footage in underwater environments for various purposes such as documentaries, films, advertisements, and scientific documentation.

It’s important to note that underwater diving work can be physically demanding and carries certain risks. Professional divers undergo specialized training and follow strict safety protocols to mitigate these risks and ensure their safety while working underwater.