B. Right Post

MX Rebreather - Right Post

The right post of the Diluent/Bailout doubles is fitted with a first stage that can accommodate the standard UTD/DIR configured hoses, as well as the MX rebreather diluent feed hose. The first stage has a standard 7ft/2m donate-able long hose attached to an open circuit second stage, that is worn exactly the same way as in the open circuit UTD/DIR configuration - tucked under the light canister, looped around the neck, and clipped off to the right chest D-ring. The hose is then stored underneath the MX breathing loop. It is stowed under the loop as it is uncomfortable if worn on top, and is only used during an out of gas (OOG) situation, which is a rare occurrence.

If donation is needed, the diver will come off the closed circuit loop by closing the mouthpiece using the lever on the BOV, raise the loop while simultaneously unclipping the long hose, donate the long hose, and then return to the BOV open circuit second stage. This puts the whole team on the familiar open circuit system, reducing stress and the need to monitor the rebreather during the emergency situation. Once emergency needs are met, the donor has the ability to return to closed circuit prior to exit or ascent.

Also attached to this first stage are two more hoses – the BCD inflation hose, same as in the standard UTD/DIR configuration, and the primary diluent feed hose. The right post was chosen to attach the “primary” diluent feed hose as this first stage is attached to the non roll-off post, which ensures “primary” functionality while diving under normal operations and facilitates the non roll-off potential during OC and CC during air sharing emergencies. It is also on the opposite post of the OC second stage on the bailout valve, or BOV. This allows the BOV to be used to add diluent directly to the loop in the event the diluent injector fails.