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My main concern with talks by these experts working for commercial/military diving & shown in Dr Doolette's presentation is that they don't test the stuff we dive! Commercial/Military divers dive a breathing mix of oxygen + ONE inert gas be that Air/Nitrox (O2/N2) or Heliox (O2/He). They can...

Not sure that's strictly true..... 1) A lot of the "deep stops" are 1min stops, these are basically slowing the ascent rate to 3m/min, I dive MultiDeco on my X1, in the water if you have direct ceiling set, your moving steadily up. E.g says 27m, by the time checked handset, it's saying 26m...

I plugged this dive in MultiDeco, the VPM-B +2 is shorter overall, but not the 46mins you said, only maybe 10mins. You stop deeper but there not really stops, just slowing your ascent. You like to quote John Thraves, on his VPM cards (he used a dive timer only x2) he noted where the first stop...

But I won't be doing dives with 5hrs of deco, so not applicable to me.... Been up to 4hrs/120m but doubt I'll bother with the deeper stuff anymore, 75/80m is most probably my max depth these days & dive boat skippers limit runtimes to 2hrs in most cases anyway!! But take your point on...

Interesting coment right at end of deep stops section, Dr. David Doolette said "...if your using deep stops to control your ascent rate & sliding up 3m at a time is most probably a good thing..." On my last dive I ascended from 65m to 35m reasonably quickly on a VPM model, then followed the...

What vacuum? Should be at ambient pressure. Both my vision heads have popped easily. Thumb on lug, 4 fingers under rim, pops off easily. Technique not brute force required...

If you have to ask, you can't afford it :o

Rubber bands are just fashion statements, sure originally free/easily available, now tech fashion items ;)

Bungy coord from a DIY store works just as well....

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