Commercial diving may be considered an application of professional diving where the diver engages in underwater work for industrial, construction, engineering, maintenance or other commercial purposes which are similar to work done out of the water, and where the diving is usually secondary to the work.
Surface supplied commercial diving equipment on display at a trade show
Inshore diving commonly includes underwater work in support of construction projects
US Navy Diver being decontaminated after a dive. If the contamination was serious, the decontamination team would have been wearing hazmat gear
Inspection of the interior of a municipal water tower requires specialized training and safety equipment.
Professional diving is underwater diving where the divers are paid for their work. Occupational diving has a similar meaning and applications. The procedures are often regulated by legislation and codes of practice as it is an inherently hazardous occupation and the diver works as a member of a team. Due to the dangerous nature of some professional diving operations, specialized equipment such as an on-site hyperbaric chamber and diver-to-surface communication system is often required by law, and the mode of diving for some applications may be regulated.
A US Navy diver at work. The umbilical supplying air from the surface is clearly visible.
Surface supplied commercial diving equipment on display at a trade show
A scientific diver at work
US Navy Clearance Divers defusing a MK17 Buoyant Mine