Originally Posted by Cave Diver
To answer that question, look at this: 8 seconds into the video the computer shows a depth of 71' and 24 minutes no stop time. The rest of the dive goes like this:
Time...Depth...No Stop Time
0:08.......71........24........2370 psi
1:19.......111.......5........ 2045 psi
1:41.......113.......5.........2145 psi
1:52.......128.......0
2:34.......141.......4........16?? psi
2:54.......144.......5........1640 psi
Interesting that there is more no stop time at 144' than there was at 128'. I think this was either multiple dives spliced together, or a bounce dive was done and the shots were put together out of sequence. PSI at 111' seems to support this.
I believe that your computer tracks no stop time until you go into deco, and then it switches to show the total time to surface (deco obligation) in the main time display. That's why the time is increasing at video time 2:34 and 2:54. There are also smaller icons showing the next stop depth and time, just above the main time (but hard to see).
I admire you for helping out in this situation- I don't know if I could have done the same, unless I had really seen signs of distress in the other divers. For me a no deco dive means a hard bottom at 120 fsw, period (unless maybe for a dire emergency). Especially in a single tank, air, and no pre-planning.