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| -rw-r--r-- | Documentation/user-manual.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt index 269edcb8a..262edd637 100644 --- a/Documentation/user-manual.txt +++ b/Documentation/user-manual.txt @@ -1954,7 +1954,7 @@ image::images/sidemount1.jpg["FIGURE: Sidemount profile",align="center"] Passive semi-closed rebreathers (pSCR) are a technical advance in diving equipment that recirculates the breathing gas a diver uses, while removing carbon dioxide from the exhaled gas. While a small amount (typically a tenth) of the exhaled breathing gas is released into the water, -a small amount of fresh gas is released from the back gas cylinder (typically containing nitrox). +a small amount of fresh gas is released from the back gas cylinder. A diver using a single cylinder of breathing gas can therefore dive for much longer periods than using a recreational open-circuit configuration. With pSCR equipment, a very small amount of breathing gas is released every time the diver inhales. With active SCR (aSCR) equipment, in contrast, a small amount of |