| Hi John,
yes that is how it works. You may also need to switch drive gases on the ascent too as some gases will not be breathable in the loop even with regular flushes in shallow water but the same problem exists with hypoxic gases on open circuit, it's just on a passive SCR it amplifies the problem. The other alternative that some people do is ascend on open circuit but I don't know if that is what GUE teaches though. |