What is the maximum working limit for the MK20 surface supplied diving system?

The maximum working limit for the MK20 surface supplied diving system is 60 feet of seawater (FSW). This limit is established based on the operational capabilities of the system, which include the dive team's health and safety protocols, decompression requirements, and the equipment's performance under pressure.

At 60 FSW, divers can effectively use the MK20 system while minimizing the risks associated with increased depths, such as nitrogen narcosis and oxygen toxicity, ensuring that divers can perform their tasks efficiently and safely. The design of the system and the training that divers undergo prepare them for operations at this specific working limit, providing a balance between maximum operational effectiveness and safety. Deviating from this limit would necessitate additional precautions and modifications to ensure the divers' safety.