Is PDIS valuable to a no-deco Nitrox diver?
I'm looking for practical value; e.g. when the HRM causes an 'increased workload' warning I simply mellow out and it extends my RBT - sometimes by 30% - so I wear the HRM on every dive. I read the PDIS manual - twice - and either I'm missing something or PDIS is really only valuable in conjunction w/ PMG for the deco crowd. Per the manual under no-stop diving (see sample1), if I'm at 77' I ascend to 42' for 2min when I've got an RBT of 3min. I'm doing a 35' ascent @ <30'/min plus a 2min PDIS stop w/ 3min left at depth - why?? Or (sample2) if I'm at 100' I ascend to 30' for 2min when I've got an RBT of 3min - this makes even less sense. If there's a mid-dive component (e.g. PDIS stop at dive time of 20min w/ RBT of 15min) is it the same crazy depth delta?? Again, practically speaking, if I'm on a wreck at 100', am I gonna take a 6min (2min up, 2min stop, 2min down) break to off-gas a little bit??
If you have thoughts/experience other than my question/s above, or I've made it painfully clear I simply misunderstand PDIS, please post that also.
Tanks,
scuba.dude