Dive Tables - anyone have digital copies?

[rongoodman]

The thing I remember most about the NEDU discussions was how much longer their "deep stops" were than what VPM typically called for.

 

[rhwestfall]

 

[girlwithbigtanks]

Used book store or thiift shop. Facebook dive buy n sell groups. All cheap, nearly free and abundant.

 

[boulderjohn]

The thing I remember most about the NEDU discussions was how much longer their "deep stops" were than what VPM typically called for.

You can review where that argument was made in the 131 pages of the ScubaBoard thread.

D

Thread 'Deep Stops Increases DCS'

Dec 8, 2014

The study below from the Navy Experimental Diving Unit indicates that Deep Stops increases incidence of DCS. I've been taught Deep Stops in my Tec Training and use Min Deco on non Tec dives on air. Should we rethink the practice of deep stops? See link below:

http://archive.rubicon-foundation.o...23456789/10269/NEDU_TR_2011-06.pdf?sequence=1

• Divetech99
• Replies: 1,301
• Forum: Technical Diving

• 

 

[lizardland]

I used VPM for quite a while. A poll of technical divers in ScubaBoard about a dozen years ago showed it was by far the most popular choice. I never heard a complaint about it.

Then came the NEDU study that cast doubts on deep stops in general, and discussions were particularly aimed at VPM. There were raging debates on all the major scuba media, debates featuring Ross Hemingway (author of V-Planner) fighting for deep stops and VPM and scientific experts, particularly Dr. Simon Mitchell, arguing against them. Those were epic battles, and every one of them pretty much ended up being Ross against the world. Ross was not exactly a gentleman in those discussions. I was then on the SB staff, and I was told to stay out of the discussions and focus on private attempts to get Ross to stop violating the ToS so the discussion could continue.

Outside of those epic battles, the chief voice in favor of VPM and deep stops was Mark Powell, author of Deco for Divers. He was a major voice for TDI, and TDI used most of his work for their Decompression Procedures course, nearly endorsing VPM. Then Mark finally said publicly that it did indeed look like the VPM level stops were too deep.

That's what ended VPM.

Yeah I think RH probably did as much to kill VPM as anything. I had run ins with him long before his arguments with Simon Mitchell and that was enough for me to lose interest in anything he had to say.

This side of the pond it had a very bendy reputation. I don't think it was ever well liked. Maybe in the US it was different, in the UK I think very few people were using it and I don't think many at the higher end of the scale were trading ZHL/GF for VPM. A lot of internet gurus were singing its praises but it never really translated into real life in my experience.

I was a member of the original discussion list and had followed its development. It seemed like an interesting concept. I had a couple of bends on it somewhere around 2004/5. One very minor that resolved with oxygen, one that needed a chamber ride. I think a few others reported similar niggles. Nothing serious but enough that VPM got a bit of a tainted rep. Like I said, I doubt it was statistically significant or at all deserved. I suspect people just thought there's no smoke without fire.