Is the Sentinel rebreather safe?
The Sentinel is a tested modern electronic CCR design. One expert on recreational sport and technical diving has said closed-circuit rebreathers are safer than open-circuit for the diligent diver. No type of rebreather can be said to be categorically safer than another. The quality of training is a major factor affecting rebreather safety. No rebreather is foolproof, and the fact remains that compared to open-circuit there are a disproportionate number of rebreather fatalities; nearly all of which have been attributed to diver error. Your safety while diving is controlled by you, not by your rebreather.
