At 1 atm gauge the salt, fresh, and EN13319 depths are: 33, 34, 33.5. At 2 atm: 66, 68, 67.
Not to be that guy, but 33' -- ten meters is two atmospheres, including pressure at sea level; and 66' -- three, not two . . .
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At 1 atm gauge the salt, fresh, and EN13319 depths are: 33, 34, 33.5. At 2 atm: 66, 68, 67.
Right, that's exactly what I think. From an educational point of view, it doesn't make sense to try to get people to think about diving to "atmospheres".
I guess the basic issue is that the salt/fresh setting on your DC is a fudge factor that will make - for example - your MOD alerts accurate in terms of actual depth under water, even though we have no way of detecting our linear depth under water, so that's really irrelevant. All we can do is detect ambient pressure. If we set the setting wrong, the linear depth will be wrong, but that wouldn't change the MOD or N2 loading calculations.
EFX:At 1 atm gauge the salt, fresh, and EN13319 depths are: 33, 34, 33.5. At 2 atm: 66, 68, 67.
Not to be that guy, but 33' -- ten meters is two atmospheres, including pressure at sea level, in terms of absolute pressure; and 66' -- three, not two . . .
This is why I said gauge pressure. Gauge pressure is only the pressure of the water column. You are referring to absolute pressure where atmospheric pressure at the surface is added to the gauge pressure.
Hey, don't get upset! It was a joke!I said half a joke, not 100%. Now, if you want to erect yourself as the Grand Master, bring it on. I believe that a dry suit does not give as much as freedom of movement than a wet suit. And it even have some additional training and safety constraints. You do question that? Fine. Then, I am sure that you will explain to us how a dry suit is much more convenient and has less safety requirement than a wet suit. I am waiting.
That’s not true. The computer doesn’t really care what type of water it is in. It only cares about the pressure. In MOD, that’s all that really matters as well. The formulas for calculating MOD are translated to distance so that they will be more meaningful to us. Pressure isn’t really a measure we can visualize well.If you don't set your DC correctly for water type it will give you a MOD alarm at the wrong depth.
I like that one .Hey, don't get upset! It was a joke!