How much Deco

taza · 12th February 2008, 12:05

Hi hoping to take Mod 1 this year (still saving)
Could you give me some example's of how much deco you have had to do.
Looking at no more than 50mtr range.
Are there any tables I could look at.

Cheers

Taza

Lancer4545 · 12th February 2008, 12:10

Have a look at V Planner. It has free trial period that should answer most of your questions.

V-Planner VPM & VPM-B dive decompression software

Regards,

Lance

***jradomski*** · 12th February 2008, 12:14

Quote: (Originally Posted by taza)

Hi hoping to take Mod 1 this year (still saving)
Could you give me some example's of how much deco you have had to do.
Looking at no more than 50mtr range.
Are there any tables I could look at.

Cheers

Taza

in general mod 1 is limited to 40m no deco (for some agencies... VERY limited deco is allowed)

taza · 12th February 2008, 12:32

Thanks for the quick replies,
How long could I stay at say
30mtr
35mtr
40mtr
before running into deco

Cheers

Taza

IanWood · 12th February 2008, 12:43

When I first started I used DDPlan ( DDPLAN [Installation] ) to make various tables of differing depths to work out what I can and can't do. I was amazed at the no stop times for shallow dives.

Ian

Campbell · 12th February 2008, 12:52

Hi,As mentioned previously depending with which agency you do your Mod 1 with depends on what you can do.I did PSAI and my depth limit is 45M and I am allowed to do up to 5 min deco.Using V planner the times aren't great for no deco diving at depths deeper than 25M. Below this the no deco times are longer than OC.HTHJohn

cramerdn · 12th February 2008, 13:11

When I did my course we racked up a small decompresion obligation on a 40m dive but it had cleared before we got to the stop depth.

IANTD 1.2 constant PO2, air dilutant charts give NDL as

42m 7 min
39m 9 min
36m 11 min
30m 21 min

if you sit at 42m for 30 minutes you end up with about 21 min of total deco.

The vision electronics and V planner will give you differant numbers of course, probably much better ones since they are not from a table.

taza · 13th February 2008, 23:12

My Head is battered,
Just got to grips with V-Planner (big thanks to Cramerdn )but don't get it.
I want to buy a rebreather so I can stay down longer, but if I put in 40mtr dives for 30 mins I get shit loads of deco.
If I stay on nitrox I get less ??????????
Am I missing something.

Cheers

Taza

Going bed with a banging head.

**mattmexico** · 13th February 2008, 23:45

Quote: (Originally Posted by taza)

Hi hoping to take Mod 1 this year (still saving)
Could you give me some example's of how much deco you have had to do.
Looking at no more than 50mtr range.
Are there any tables I could look at.

Cheers

Taza

yo

Under IANTD standards you are allowed to do a max of 15 min deco.

greetings
Matt

scuba_phil · 13th February 2008, 23:59

Your doing it wrong, 23 min later your back at the surface (and that is with conservatism set at +3 diving at a set point of 1.2):

V-Planner 3.82 by Ross Hemingway,
VPM code by Erik C. Baker.
Decompression model: VPM - B
DIVE PLAN
Surface interval = 5 day 0 hr 0 min.
Elevation = 0m
Conservatism = + 3
Dec to 40m (2) Diluent Air 0.70 SetPoint, 15m/min descent.
Level 40m 27:20 (30) Diluent Air 1.20 SetPoint, 38m ead
Asc to 18m (32) Diluent Air 1.20 SetPoint, -9m/min ascent.
Stop at 18m 0:33 (33) Diluent Air 1.20 SetPoint, 10m ead
Stop at 15m 2:00 (35) Diluent Air 1.20 SetPoint, 6m ead
Stop at 12m 2:00 (37) Diluent Air 1.20 SetPoint, 3m ead
Stop at 9m 3:00 (40) Diluent Air 1.20 SetPoint, 0m ead
Stop at 6m 13:00 (53) Diluent Air 1.20 SetPoint, 0m ead
Surface (53) Diluent Air -9m/min ascent.
Off gassing starts at 27.1m
OTU's this dive: 69
CNS Total: 24.4%

Phil

12th February 2008, 12:05	#1 (permalink)
taza New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Vision Join Date: Jul 2007 Location: Warrington UK Posts: 87	How much Deco Hi hoping to take Mod 1 this year (still saving) Could you give me some example's of how much deco you have had to do. Looking at no more than 50mtr range. Are there any tables I could look at. Cheers Taza
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12th February 2008, 12:10	#2 (permalink)
Lancer4545 RBW Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jun 2007 Location: Cairns QLD Australia Posts: 748	Re: How much Deco Have a look at V Planner. It has free trial period that should answer most of your questions. V-Planner VPM & VPM-B dive decompression software Regards, Lance __________________ You can run but you can't hide! ISC Appointed Megalodon Dealer for East Australia http://www.closedcircuitdivers.com.au info@closedcircuitdivers.com.au
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12th February 2008, 12:14	#3 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,115	Re: How much Deco Quote: (Originally Posted by taza) Hi hoping to take Mod 1 this year (still saving) Could you give me some example's of how much deco you have had to do. Looking at no more than 50mtr range. Are there any tables I could look at. Cheers Taza in general mod 1 is limited to 40m no deco (for some agencies... VERY limited deco is allowed) __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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12th February 2008, 12:32	#4 (permalink)
taza New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Vision Join Date: Jul 2007 Location: Warrington UK Posts: 87	Re: How much Deco Thanks for the quick replies, How long could I stay at say 30mtr 35mtr 40mtr before running into deco Cheers Taza
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12th February 2008, 12:43	#5 (permalink)
IanWood New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: May 2006 Location: London Posts: 26	Re: How much Deco When I first started I used DDPlan ( DDPLAN [Installation] ) to make various tables of differing depths to work out what I can and can't do. I was amazed at the no stop times for shallow dives. Ian
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12th February 2008, 12:52	#6 (permalink)
Campbell RBW Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2006 Location: Portsmouth, UK Posts: 116	Re: How much Deco Hi,As mentioned previously depending with which agency you do your Mod 1 with depends on what you can do.I did PSAI and my depth limit is 45M and I am allowed to do up to 5 min deco.Using V planner the times aren't great for no deco diving at depths deeper than 25M. Below this the no deco times are longer than OC.HTHJohn __________________
(Offline)

12th February 2008, 13:11	#7 (permalink)
cramerdn Obey my dog! Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 738	Re: How much Deco When I did my course we racked up a small decompresion obligation on a 40m dive but it had cleared before we got to the stop depth. IANTD 1.2 constant PO2, air dilutant charts give NDL as 42m 7 min 39m 9 min 36m 11 min 30m 21 min if you sit at 42m for 30 minutes you end up with about 21 min of total deco. The vision electronics and V planner will give you differant numbers of course, probably much better ones since they are not from a table. __________________ "Its better to live one day as a tiger than an entire life as a worm." "But who's ever heard of a worm skin rug?"
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13th February 2008, 23:12	#8 (permalink)
taza New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Vision Join Date: Jul 2007 Location: Warrington UK Posts: 87	Re: How much Deco My Head is battered, Just got to grips with V-Planner (big thanks to Cramerdn )but don't get it. I want to buy a rebreather so I can stay down longer, but if I put in 40mtr dives for 30 mins I get shit loads of deco. If I stay on nitrox I get less ?????????? Am I missing something. Cheers Taza Going bed with a banging head.
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13th February 2008, 23:45	#9 (permalink)
mattmexico PROTEC MEXICO Current Rebreather/s: Megalodon Classic Kiss Optima RB80 / Clone Other Rebreather/s: Inspiration Classic Evolution Prism Topaz Sport Kiss RB80 / Clone Join Date: Aug 2005 Location: Mexico, Q.Roo, Playa del Carmen Posts: 776	Re: How much Deco Quote: (Originally Posted by taza) Hi hoping to take Mod 1 this year (still saving) Could you give me some example's of how much deco you have had to do. Looking at no more than 50mtr range. Are there any tables I could look at. Cheers Taza yo Under IANTD standards you are allowed to do a max of 15 min deco. greetings Matt __________________ N 20' 37.617' W 87' 04.693' www.andreaswmatthes.com
(Online)

13th February 2008, 23:59	#10 (permalink)
scuba_phil New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jun 2006 Location: Orange County, CA Posts: 28	Re: How much Deco Your doing it wrong, 23 min later your back at the surface (and that is with conservatism set at +3 diving at a set point of 1.2): V-Planner 3.82 by Ross Hemingway, VPM code by Erik C. Baker. Decompression model: VPM - B DIVE PLAN Surface interval = 5 day 0 hr 0 min. Elevation = 0m Conservatism = + 3 Dec to 40m (2) Diluent Air 0.70 SetPoint, 15m/min descent. Level 40m 27:20 (30) Diluent Air 1.20 SetPoint, 38m ead Asc to 18m (32) Diluent Air 1.20 SetPoint, -9m/min ascent. Stop at 18m 0:33 (33) Diluent Air 1.20 SetPoint, 10m ead Stop at 15m 2:00 (35) Diluent Air 1.20 SetPoint, 6m ead Stop at 12m 2:00 (37) Diluent Air 1.20 SetPoint, 3m ead Stop at 9m 3:00 (40) Diluent Air 1.20 SetPoint, 0m ead Stop at 6m 13:00 (53) Diluent Air 1.20 SetPoint, 0m ead Surface (53) Diluent Air -9m/min ascent. Off gassing starts at 27.1m OTU's this dive: 69 CNS Total: 24.4% Phil
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