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I'm out of here, fcuk it I'm off diving......

VR's wasn't a proper implementation, therefore most stuck with their original algorithm. The problem with VPM is it takes more processor power to run the algorithm, most CPU's used in typical dive computers don't have enough poke....

Not true.... see earlier threads by me/Baron015. We discussed a 60m dive, I do 40mins BT, on GF70/70 I'd have to cut BT to 25mins to stay within 2hr limit set by skipper. So I'd loose 15mins bottom time. Baron015, stated he'd had to reduce his bottom times since changing to a 70/70...

Why the fixation on vpmb2? I use vpmb3 with gfs 95.... In your example is the bottom time the same for both profiles? The overall runtime is the same, but without bothering to run them I'd say the bottom time is shorter for 80/90. That's my point....

Simon, your not taking other factors into account, there is more to consider than deco theory in isolation. I usually dive with a 2hr max runtime, my optimal deco is that which maximises bottom time without taking a helicopter ride after the dive! It shouldn't be like that but it is, dives...

Ditto.... Stuck 16/24 in my unit then moved to 15/29 & then 10/50 once I had 20 hrs on the unit. Only did a CCR trimix ticket (easiest course) as diving outside UK & had to show it some spotty dive guide!

Think you answered your own question! A twin set for scalloping sounds ideal, you don't need to do every dive on RB to stay dived up.....

I'm most probably wrong, but VPM-B doesn't appear to penalize you for using Helium in the same way as ZHL does.... It at least appears that way in practise.

Your in the States & your buddies/friends dive Megs, thought the choice would be simple, get a Meg (and I'm not a Meg fan). There is a lot to be said for having buddies/friends on the same unit, especially when first on the unit, you can tap into their experience & you'll have access to spares...

OK, I've put my last 62m dive (38mins BT), 12/42 diluent, SP=1.30 thru MultiDeco on a GF plan of 70/70. On that plan the first stop is at 27m & the overall runtime is 130mins with 51mins @ 6m. Using VPM-B+3 / GFS 95% (what I dive), the first stop is at 39m, but the're only 1min stops so just...

There was me thinking a forum is a place for discussion & folks are free to post different/opposing opinions/arguments ;) Next you'll say you believe in global warming because of all the experts that back it, even though there are other experts that say it isn't happening....

If you read my posts I don't see that the first stop on VPM are much/if at all deeper than a GF profile & I feel fine after the dive. I don't feel like I've been run over by a bus. I initially dive 15/85 (Vision default) then moved to 10/90, then 10/95. Now I dive VBM-B/GFS (note the shallow...

Dived the Greek Cargo ship (sunk in 1967) SS Aristos (60M) last Friday, only four of us on the boat, 2 OC & 2 CCR. Basically had the wreck to myself, only got 55mins on the wreck due to a 2hr runtime limit, could have done much longer... Off to dive an old favorite, HMS Moldavia tomorrow, a...

Interesting discussion, but I don't intend to change my decompression style. I'd rather base my descision on my own first hand experience, rather than experts, no matter how well qualified they are. My buddy & me have done many dives using VPM without issue & feel good after the dive...

7L Ali (232bar WP) one with 60% the other with AIR & a 7L Steel Faber with 16/45 trimix, same bouyancy as the Ali's as long as it's a reasonably high percentage of helium. Sold my Ali 80's as I hardly ever used them....

My point exactly.... We don't need to, just use VPM..:devilban:

I am away of David Doolette's personal diving experience & respect his opinion, did listed to the interesting presentation referenced in this thread. However, will NEDU give him the time/budget to test the gases we dive? I doubt it, that was the point I was making...

No, why not make a positive reply & say where commie/military are using gases with more than one inert gas unless your referring to O2/Helium/Hydrogen.... which is for dives well out of our depth range as I understand it.

Not defending, just countering your statement that implied it's a fault on the Inspo, you've now said SOME. Maybe some do have tight fitting lids, maybe thay use Crystaloube rather than silicon grease, seen some folks removing head when still attached to T-pieces, maybe they need to replace the...

30/95 (EDIT: more like 30/100 for dives I do, say 30/98 on Vision) Agree, I don't use VPM-B for bailout, to much time in mid depth. On the X1 I have VPB-B/GFS as my main deco with two bailout plans. One is VPM-FBO (fast bailout) VPM altered to get you to 21m more quickly, but you pay the...