What does the term "SSD" refer to in diving practices?

The term "SSD" in diving practices refers to surface-supplied diving. This method involves divers receiving their breathing gas from the surface through a hose, which allows for a continuous supply of air while they operate underwater. This practice is crucial in deep-sea diving and situations where long durations underwater are required, as it mitigates the risks associated with using self-contained diving equipment, such as limited air supply.

Surface-supplied diving offers several advantages, including the ability to provide divers with a constant and ample air supply, enhanced safety through direct communication with surface personnel, and the option to integrate additional tools and equipment. This approach is particularly effective for commercial diving operations, underwater construction, and rescue missions, where maintaining a safe and controlled environment is essential.