What deco algorithmn and settings do you use?

Janos · 15th September 2006, 09:52

I'm curious as to what deco algorithmns people use. I'm aware of some of the pros and cons of Bulhman and VPM, but I haven't a clue as to what level of conservatism people use. This wasn't a problem at recreational depths, but now I'm going a bit deeper, being conservative at every possible opportunity gives very long stops.

So I'm curious to know what people would use on (say) a 45min dive to 60m. I know similar has been done before, but we have more members now and people's views change with time.

Janos

PS - I appreciate there are other algorithmns to Bulhman and VPM-B, notably RGBM, but I don't understand them well enough to offer them as poll options as I don't know how conservatism works on (say) RGBM.

Janos · 15th September 2006, 10:43

PS - If there are other GFs that you use, or other algorithmns, then I'd be interested to know what they are. I ran out of poll options.

Janos

***schford*** · 15th September 2006, 10:50

I dont think a poll works for something like this.

Personally I use both RGBM on +1 conservitism and Gradiant Factor on either 10/90 or 10/99

That way I get all the lovely deep stops of RGBM to stop those bubbles forming and a nice long buhlmann tail to get rid of them if they do.

I would really like a 10/95 option on my Shearwater but until I upgrade it with Bruce I pick which tail I want dependant on the dive.

Cheers

Stuart

JonnyB · 15th September 2006, 10:58

I think you need to alter the poll.
Yo uare just covering the VPM and Buehlmann algorithms.
I would add RGBM and US Navy ones.

I use RGBM +1 with GF 30/85. No problems so far...

/Jonny

lizardland · 15th September 2006, 11:11

I use Hamilton's M11F6 algorithm. It has no conervatism settings as it is designed for strenuous diving and is inherently conservative but I usually chuck in 1min Pyle stops. I built it into XS a couple of years ago, it seems to work for me.

Cheers,

Stuart

Janos · 15th September 2006, 11:14

Quote: (Originally Posted by JonnyB)

I think you need to alter the poll.
Yo uare just covering the VPM and Buehlmann algorithms.

You are right. And what's more you can spell Buehlmann better than me.

I don't have much experience of RGBM, so don't really know how the conservatism varies. Also I ran out of poll options...

Janos

**nigelh** · 15th September 2006, 12:27

The Vision is set to 100/100 GF and the VR3 to zero conservatism.

Then I do a slow slow ascent with any extra stops that come to mind, lengthen the deeper stops and then overrun the 6m final stop by a variable amount depending on how cold I am, how desperate my tea withdrawal symptoms are becoming and how the swell above looks from a seasickness point of view.

The computers are only there to provide a base line or 'fastest time to surface' and I don't tell the VR3 if I'm boosting the O2 at 6m. If I have a buddy who is doing 'conservatism by computer' I can fall in with that but on CCRs you can do extra deco time at effectively no cost.

Dave Faye · 15th September 2006, 14:36

I use 15/85 on my Vision and desktop planner and VPM-B on my VR3 conserv set at 0. The new VR3 VPB-B is conservative enough for me.

Dave

***ScubaDadMiami*** · 15th September 2006, 14:59

Hammerhead with 35/90 GF. I do throw in some deeper stops along the way.

Mark Chase · 15th September 2006, 15:02

VR3 set to zero safety as a back up and Hammer Head GF deco running 20/85

I can switch to 30/100 mid dive if i need out quicker so i don't have to have the HH on 100/100 just in case.

I am planning on using VPMBE for big dives 100m+ over three hours run time I plan on VPMBE +3 safety using Heliox and cut tables.

This is because VPMB seems a lot more helium friendly than other software out there.

IF there was a VPMB deco computer (with an option for VPMBE )out there Id have a go with VPMB but I don't want to go back to tables for every day diving down to 60-70m and the VPMB in the VR3 apparently doesn't work.

ATB

Mark Chase

View Poll Results: What do you use on a 45min dive to 60m?
VPM-B +0	6	6.52%
VPM-B +1	4	4.35%
VPM-B +2	19	20.65%
VPM-B +3	3	3.26%
VPM-B +4 or more conservative	5	5.43%
Bulhman 15/85	12	13.04%
Bulhman 20/80	19	20.65%
Bulhman 30/90	2	2.17%
Bulhman 10/110	0	0%
Something else	22	23.91%
Voters: 92. You may not vote on this poll

15th September 2006, 09:52	#1 (permalink)
Janos "Two Sheds" Current Rebreather/s: Classic Kiss Other Rebreather/s: Classic Kiss Join Date: Feb 2005 Location: East Surrey Posts: 594	What deco algorithmn and settings do you use? I'm curious as to what deco algorithmns people use. I'm aware of some of the pros and cons of Bulhman and VPM, but I haven't a clue as to what level of conservatism people use. This wasn't a problem at recreational depths, but now I'm going a bit deeper, being conservative at every possible opportunity gives very long stops. So I'm curious to know what people would use on (say) a 45min dive to 60m. I know similar has been done before, but we have more members now and people's views change with time. Janos PS - I appreciate there are other algorithmns to Bulhman and VPM-B, notably RGBM, but I don't understand them well enough to offer them as poll options as I don't know how conservatism works on (say) RGBM. __________________ You can lead a horse to water but you can't climb a ladder with a large bell in both hands - Vic Reeves www.hellfins.com/shed Last edited by Janos : 15th September 2006 at 10:43.
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15th September 2006, 10:43	#2 (permalink)
Janos "Two Sheds" Current Rebreather/s: Classic Kiss Other Rebreather/s: Classic Kiss Join Date: Feb 2005 Location: East Surrey Posts: 594	Re: What deco algorithmn and settings do you use? PS - If there are other GFs that you use, or other algorithmns, then I'd be interested to know what they are. I ran out of poll options. Janos __________________ You can lead a horse to water but you can't climb a ladder with a large bell in both hands - Vic Reeves www.hellfins.com/shed
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15th September 2006, 10:50	#3 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,673	Re: What deco algorithmn and settings do you use? I dont think a poll works for something like this. Personally I use both RGBM on +1 conservitism and Gradiant Factor on either 10/90 or 10/99 That way I get all the lovely deep stops of RGBM to stop those bubbles forming and a nice long buhlmann tail to get rid of them if they do. I would really like a 10/95 option on my Shearwater but until I upgrade it with Bruce I pick which tail I want dependant on the dive. Cheers Stuart __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
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15th September 2006, 10:58	#4 (permalink)
JonnyB Johnny The Hatch Current Rebreather/s: MK 15.X Titan Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Megalodon Sport Kiss Classic Kiss Other CCR Other SCR Home Build Join Date: Jan 2005 Location: Sweden (Stockholm)/Cyprus(Ayia Napa) Posts: 962	Re: What deco algorithmn and settings do you use? I think you need to alter the poll. Yo uare just covering the VPM and Buehlmann algorithms. I would add RGBM and US Navy ones. I use RGBM +1 with GF 30/85. No problems so far... /Jonny __________________ A quote from Crazyduck - In remembering our own Rob Davies. "Outbound flight 777 heavy you are cleared for flight Due west into that warm red Texas sunset You have angels on your wings and divers memories on your six." Rest In Peace http://www.divetekcyprus.com http://www.diveccr.com
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15th September 2006, 11:11	#5 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,253	Re: What deco algorithmn and settings do you use? I use Hamilton's M11F6 algorithm. It has no conervatism settings as it is designed for strenuous diving and is inherently conservative but I usually chuck in 1min Pyle stops. I built it into XS a couple of years ago, it seems to work for me. Cheers, Stuart __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
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15th September 2006, 11:14	#6 (permalink)
Janos "Two Sheds" Current Rebreather/s: Classic Kiss Other Rebreather/s: Classic Kiss Join Date: Feb 2005 Location: East Surrey Posts: 594	Re: What deco algorithmn and settings do you use? Quote: (Originally Posted by JonnyB) I think you need to alter the poll. Yo uare just covering the VPM and Buehlmann algorithms. You are right. And what's more you can spell Buehlmann better than me. I don't have much experience of RGBM, so don't really know how the conservatism varies. Also I ran out of poll options... Janos __________________ You can lead a horse to water but you can't climb a ladder with a large bell in both hands - Vic Reeves www.hellfins.com/shed
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15th September 2006, 12:27	#7 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 824	Re: What deco algorithmn and settings do you use? The Vision is set to 100/100 GF and the VR3 to zero conservatism. Then I do a slow slow ascent with any extra stops that come to mind, lengthen the deeper stops and then overrun the 6m final stop by a variable amount depending on how cold I am, how desperate my tea withdrawal symptoms are becoming and how the swell above looks from a seasickness point of view. The computers are only there to provide a base line or 'fastest time to surface' and I don't tell the VR3 if I'm boosting the O2 at 6m. If I have a buddy who is doing 'conservatism by computer' I can fall in with that but on CCRs you can do extra deco time at effectively no cost. __________________ nigelh
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15th September 2006, 14:36	#8 (permalink)
Dave Faye Know the wreck below? Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Classic Evolution Megalodon Join Date: Oct 2005 Location: Boston Posts: 166	Re: What deco algorithmn and settings do you use? I use 15/85 on my Vision and desktop planner and VPM-B on my VR3 conserv set at 0. The new VR3 VPB-B is conservative enough for me. Dave
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15th September 2006, 14:59	#9 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 2,073	Re: What deco algorithmn and settings do you use? Hammerhead with 35/90 GF. I do throw in some deeper stops along the way. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
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15th September 2006, 15:02	#10 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,561	Re: What deco algorithmn and settings do you use? VR3 set to zero safety as a back up and Hammer Head GF deco running 20/85 I can switch to 30/100 mid dive if i need out quicker so i don't have to have the HH on 100/100 just in case. I am planning on using VPMBE for big dives 100m+ over three hours run time I plan on VPMBE +3 safety using Heliox and cut tables. This is because VPMB seems a lot more helium friendly than other software out there. IF there was a VPMB deco computer (with an option for VPMBE )out there Id have a go with VPMB but I don't want to go back to tables for every day diving down to 60-70m and the VPMB in the VR3 apparently doesn't work. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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