As indicated above, it takes really careful planning to avoid potential problems with the automatic gas switching in certain cave profiles. And with the limits of the interface that level of planning is either a PITA or requires a laptop.
And as you suggest, a lost gas scenario will leave the computer blissfully assuming you actually made a gas switch when you didn't. So your only options are to fall back on tables and/or contingency plans for the deco, or to use another computer.
Personally, I bought a Aladin Tec 2G which uses manual gas switching, for N Fl cave dives rather than continue to mess with the Cochran in that environment.
As for lost gas scenarios in offshore diving, I'll still just continue to carry a bottom timer (or the Tec 2G in gauge mode) on trimix dives, cut contigency plans and put them on a slate to cover anything where the automatic gas switching presents a problem.
The inability to cancel a planned gas switch is THE major weakness with the Cochran.
And as you suggest, a lost gas scenario will leave the computer blissfully assuming you actually made a gas switch when you didn't. So your only options are to fall back on tables and/or contingency plans for the deco, or to use another computer.
Personally, I bought a Aladin Tec 2G which uses manual gas switching, for N Fl cave dives rather than continue to mess with the Cochran in that environment.
As for lost gas scenarios in offshore diving, I'll still just continue to carry a bottom timer (or the Tec 2G in gauge mode) on trimix dives, cut contigency plans and put them on a slate to cover anything where the automatic gas switching presents a problem.
The inability to cancel a planned gas switch is THE major weakness with the Cochran.