At what pressure should the first stage regulator for the EGS bottle be set?

The first stage regulator for the EGS (Emergency Gas Supply) bottle should be set to 135 psig to effectively balance the needs of the diver while ensuring safety. This pressure is optimal for delivering breathable gas to the diver under various operational conditions, providing a consistent and manageable gas flow, which is essential for underwater rescue operations.

Setting the pressure too low could lead to insufficient gas supply, particularly in emergency situations where every second counts. Conversely, setting it too high may overwhelm the diver or the delivery system, posing risks of complications such as hyperoxia or equipment failure. Therefore, 135 psig is chosen as it offers a practical balance between reliability and safety under operational pressures typically encountered in undersea rescue scenarios.