The "fast" tissues also tolerate much greater supersaturation, and when you combine that with their rapid off-gassing, they aren't going to force you into a decompression stop . . . which is the essence of exceeding your NDL's, right?
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meekal:- that's why you do your homework (like me!) and get a SUUNTO (like me!) - even the lowest priced MOSQUITO uses the RGBM model. when you download the data to your PC and make all dem purty graphs you can play the dive like a VCR where on the NITROGEN loading graph; yes, it DOES show you offgassing as you come up from depth - but only in certain 'compartments' - [as noted elsewhere] - some of the "deeper" compartments continue to ON-gas.
TSandM:The "fast" tissues also tolerate much greater supersaturation, and when you combine that with their rapid off-gassing, they aren't going to force you into a decompression stop . . . which is the essence of exceeding your NDL's, right?
However, there were references to 'recreational dive profiles' which would be different than 'decompression obligation incurred' dives - which are indicated when saturation is reached in a compartment.
Here's another way of analyzing your observations. Again, instead of saying that the first compartment gets to 50% saturation, this way of looking at it says that the first compartment, even when approaching saturation at the inspired pressure of N2, it will only get to about 50% of maximum allowable compartment pressure / M-value.WarmWaterDiver:Download the software and run the dive simulator using EAN32 and a 60 FSW square profile dive. Run the time at 60 FSW to 50 minutes at the bottom, and watch the 12 bar graphs in the lower right hand corner, as well as the display for NDL time remaining. The fastest compartment will get to about 50% saturation and hold there. The third, fourth, and fifth compartments will all be right at 77% or so, all togetrher ( which says to me this could be cut to one compartment here - why three with values all right together? - and explains why the Dive Rite model with 9 compartments parallels this model with 12 compartments so closely). Now on the simulator, make an ascent to 30 FSW and hold there for 1 minute. Note that no compartment starts to drop in % saturation until you start the ascent. Then ascend for a three minute safety stop at 15 FSW, then surface. watch the bar graphs and NDL times through this process. Once you see it graphically, it should make more sense.