Halcyon's extremely intuitive and reliable, patented RB80™ operating system eliminates distractions and reduces failures that can mean the difference between a mission's success or failure. The Halcyon rebreather supplies breathing gas as required by the diver's respiratory rate, providing less oxygen variation and better predictability. Gas replenishment is mechanically triggered by the diver's breathing cycle so that a compromise in supply is obvious and immediate. This mechanical system is less prone to failure and easier to operate as compared to complex, electronically controlled rebreathers.
