> > We all know of many "near-misses" and a couple of fatalities that > > could have been avoided had a dual-outlet manifold been > > properly used. > > backups. In my opinion, the only clear disadvantage of independant doubles is > the increase in task loading. Those were the "near-misses" that I was talking about, the ones due to task loading. Monitoring another gauge does increase task loading, and might have been a contributing factor in the cases where someone ran their indepentant doubles "dry". There is no excuse for running out of breathing gas, of course. -dan
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