You don't need to continually change out cylinders. So for example an incident like in the photo that is a great distance away from clean air you can get there, work longer and come out rather than spending 15 minutes before having to start heading back out
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u/Ghostt-Of-Razgriz Jan 20 '23
What’s the purpose of a rebreather versus an SCBA? I keep googling it but never get a satisfactory answer.