First Stage

• Over-balanced diaphragm design — As the diver descends, the over-balancing feature allows the medium-pressure gas in the hose to increase at a rate faster than ambient pressure, delivering superior performance at depth.
• Rotating turret with 2 high-pressure (HP) ports and 4 medium-pressure (MP) ports, each angled for optimum hose routing.
• Environmental dry system — Keeps water out of the main spring chamber to help prevent ice buildup and to keep silt and contamination out.