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[Choose #1] I normally don’t last as long as my tank on the first dive.
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[Choose #2] I haven’t reached either limit yet.
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[Choose #1] for a single tank, I use a steel 120 / 15 ltr tank. but NDL is usually not the limiting factor except on deeper dives.. I am an air hog.
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[Choose #2] I dive a 100cf tank in cold water, and when I started diving the air was the limiting factor without a doubt. At about dive 130 that flipped to bottom time being the constraining factor. I recognize that’s not answering the prompt. :-)
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joec1 - 9/16/2014 9:19 AM
[Choose #2] yes and No, depending on depth. I can do 65’ for 45 min and have half a tank. I think you might need to do graph or something to accurately answer this.
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[Choose #1] ...I mostly dive shallow, so the supply air is what limits the dive.
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[Choose #1] considering a 30’ you could stay there all day without NDL? you might need to re-think the question.
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Agojo - 9/10/2014 7:45 AM
[Choose #2] Occasionally use one tank for 2 dives due to deco times, just did Oriskany 126’ with AL80, 28%nitrox and surfaced after 1 min deep and 4 min safety stops with over 1200psi. Moderate current surface to 126’.
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[Choose #2] Of course, it depends on depth.. Best time so far is 87 minutes on an AL80. Started with 3000 came up with 380. Depth was 35-48 feet.
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[Choose #1] Regardless of depth really doesn’t make sense to me as it’s the #1 factor. Below 20’ has almost unlimited time. Unless your not going to count a dive that’s below 20’ as a dive.LOL
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[Choose #1] hardly! Give me another few years....or so.
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[Choose #2] Depending on depth of coarse, best bottom time yet 2.5 hrs
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[Choose #1] DCIEM gives me 150 mins at 40’ - I might get 60 mins of bottom time with an AL80 and exit with ~500 psi at that depth.
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[Choose #1] I use up that air !!!!
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Greg - 9/09/2014 12:50 PM
[Choose #1] On a single AL80 tank, I have always run out of air before I hit deco limits. On a 40’ dive, I can last about 60 minutes (NDL at that depth is 140 mins) with about 300 psi left.
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[Choose #1] I’m so confused on how everyone is saying "No". I find it unlikely at 40’ you guys are getting 130 minutes of air time on a single 80cf alum...
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[Choose #2] CC - so always run into deco way before running low on gas. Same always held true for OC, but that is because I plan my dives then dive my plan...
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[Choose #2] The last thing I’m worried about is running out of air.
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[Choose #2] Never except really deep dives but now I wouldn’t be using air at that depth
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