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As I mentioned a couple of days ago, I tried out twin 12's for the first time this week.

When diving with a single, my SAC averages 23 l/min. My first two twin 12 dives (at similar levels of exertion), I was at 19 l/min. Why might this be - has anyone else experienced something similar?

Cheers
Gary

PS - happy new year to all on YD
 

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Nothing else changed..... and using a bunch of similar dives as Horsea as a sensible benchmark.

Just using the standard formula, plugging in the average depth for the dive.
 

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It's highly likely that, because you knew you had shedloads of gas with the twinset, you were more relaxed for the dive and therefore breathed less.
 

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I'm thinking better trim as well.  When diving with my twins, I'm a little head heavy because of the manifold which puts me in a very horizontal position.  With a single, it feels like I have nothing on so I find that many times I'm actually a little head up.
 

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"Three sheds"
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What Dom said.

It happened to me when I switched to twins a couple of months ago. I always used to be, well not worried, but watching my air and now I don't have to.

Laters,
   Janos

PS - I do still monitor my air, but you know what I mean
 

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<font color='#000080'>I dont think i have ever come up with less than about 75 bar in each 10 (including to 45m and about 15 mins deco).  But then im a girl (breathe less) and i swear someone way back in my ancestry got a bit funny with a dolphin.
 

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<font color='#000080'>So Porg where is you blowhole then
? ? ? ?
 
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