When is an Emergency Gas Supply (EGS) required with the MK20 system?

An Emergency Gas Supply (EGS) is crucial when using the MK20 system, particularly in enclosed space diving. This requirement stems from the inherent risks associated with such environments, where divers may be exposed to challenging conditions that can restrict their ability to ascend to the surface safely. In confined spaces, factors like limited visibility, reduced mobility, and the potential for entrapment can dramatically increase the risks of a dive. An EGS provides a supplemental air supply that ensures divers have access to breathing gas in case of equipment failure or other emergencies, allowing them to safely manage unexpected situations.

The EGS is a safety measure designed to enhance the overall safety of divers, particularly in scenarios where they may not immediately have a clear path to exit. In enclosed spaces, having this backup supply can prevent potentially life-threatening situations. While it is good practice to consider possible emergencies in all diving scenarios, the necessity for an EGS is heightened specifically in enclosed spaces due to the additional risks involved.