Final Decompression Stop Depth

pwl4476 · 16th April 2008, 11:59

6 meters for me as well. Same reasons as others.

A couple of others as well:

In some of the overheads in which we dive there are advantages to 20 feet.

In Devil's Ear there's a submerged tree. With the strong flow coming out you ascend to 20, put your back against the tree, and the flow holds you securely in place for a long deco. If you rise to 15, you may have to straddle the tree like a cowboy. Resisting the flow can tire you out.

In Devil's Eye and Little River there are natural ledges to rest on while decompressing at 20. At Madison Blue you exit the cave through a small opening and the basin has a nice slope making 20 comfortable.

However at Jackson Blue there's a very comfortable large rock at 15' that will will fit 2 laying down. A perfect deco stop.

In general there seem to be good 20' opportunites while cave diving, 15' is more prevalent outside the overhead zone. And why do more work than you have to?

Paul

Scubascooby · 16th April 2008, 12:13

6m for many of the reasons given above. Plus buoyancy is easier to control at 6m especially if there is a swell and surface "current".

If the computer shows a shallower stop I usually stay at 6m for several minutes more before ascending slowly towards the new ceiling.

Dutchy · 16th April 2008, 12:23

6m, it let's me test my cells to 1.5-1.6. Since SP for diving is a mere 1.0 this provides me with an opportunity to test my cells. (After a long time of non-diving I will do this on the way down)

**aainslie** · 16th April 2008, 17:24

The final stop is always a trade-off between staying deep to reduce bubble size, and shallow to reduce O2 effects. So I use a happy medium of 15 ft - it's a PO2 of 1.4, but somewhat higher pressure than a 10 ft stop.

se2schul · 16th April 2008, 17:42

Depends...
6m if I'm on oxygen.
3m if I'm on anything other than oxygen.

For big dives, my last stop is often lying on the surface of the water breathing O2 for several minutes before climbing back on the boat.

***ScubaDadMiami*** · 16th April 2008, 17:54

Quote: (Originally Posted by Stephane)

Hi,

I have just bought a HH controller and the last stop is at 3m. I personally would prefer to do the last stop at 6m but it's not an option on the computer.
What do you do guys when you're following the deco on you computer? Do you still do the last stop deeper than what the computer says? Doesn't it take ages to clear the last stop?

You still get credit for the stop at 20. You will still have to clear the last couple of minutes at 10 foot stop on the way up. However, if you ascend slowly, it doesn't add up to much extra.

Mark Chase · 16th April 2008, 18:22

I didnt vote.

There wasn't a choice for "all of the above".

Totaly depends on sea conditions. If its flat 3 if not maby 4.5 or 6.

Last friday was a shot line ascent so i did it all at 8

ATB

Mark

Alkermes · 16th April 2008, 19:35

Mark, the SW does the option of making the last stop on 3, 4,5 or 6m?...

Alkermes

Numpty diver · 16th April 2008, 21:28

I like 5m As last stop in Norway ..
The lager n lime seems to be at 6ms
The fresh water run off is from 3.5 up,,, bloody cold there 2/3 degrees in the water, possibly 0 degrees in the fjords. not nice on kit or me .
Also another Reason being , if i loose my buoyancy during deco ill still be at 5.5 or 4.5.

doug allen · 17th April 2008, 00:05

20'....just try 10'....the Rebreather will pump gas too you too fast...try not expelling gas around the mask, etc....plus, it is a bit hot at 10'...in warm waters.

Of course, I'm speaking about the Optima....other systems may be different.

Doug

View Poll Results: What is your final decompression stop depth
3 meters or 10 ft	8	5.93%
4.5 meters or 15 ft	30	22.22%
5 meters or 16.5 ft	12	8.89%
6 meters or 20 ft	85	62.96%
Voters: 135. You may not vote on this poll

16th April 2008, 11:59	#11 (permalink)
pwl4476 New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Oct 2007 Location: Olathe, KS Posts: 63	Re: Final Decompression Stop Depth 6 meters for me as well. Same reasons as others. A couple of others as well: In some of the overheads in which we dive there are advantages to 20 feet. In Devil's Ear there's a submerged tree. With the strong flow coming out you ascend to 20, put your back against the tree, and the flow holds you securely in place for a long deco. If you rise to 15, you may have to straddle the tree like a cowboy. Resisting the flow can tire you out. In Devil's Eye and Little River there are natural ledges to rest on while decompressing at 20. At Madison Blue you exit the cave through a small opening and the basin has a nice slope making 20 comfortable. However at Jackson Blue there's a very comfortable large rock at 15' that will will fit 2 laying down. A perfect deco stop. In general there seem to be good 20' opportunites while cave diving, 15' is more prevalent outside the overhead zone. And why do more work than you have to? Paul
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16th April 2008, 12:13	#12 (permalink)
Scubascooby Better Off Out of the EU Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Nov 2005 Location: Great Britain Posts: 367	Re: Final Decompression Stop Depth 6m for many of the reasons given above. Plus buoyancy is easier to control at 6m especially if there is a swell and surface "current". If the computer shows a shallower stop I usually stay at 6m for several minutes more before ascending slowly towards the new ceiling. __________________ "dove" is NOT the past tense of "dive" Better off OUT of the EU !
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16th April 2008, 12:23	#13 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 729	Re: Final Decompression Stop Depth 6m, it let's me test my cells to 1.5-1.6. Since SP for diving is a mere 1.0 this provides me with an opportunity to test my cells. (After a long time of non-diving I will do this on the way down) __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007
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16th April 2008, 17:24	#14 (permalink)
aainslie So Cal Tech Diver Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Apr 2006 Location: LA Posts: 134	Re: Final Decompression Stop Depth The final stop is always a trade-off between staying deep to reduce bubble size, and shallow to reduce O2 effects. So I use a happy medium of 15 ft - it's a PO2 of 1.4, but somewhat higher pressure than a 10 ft stop. __________________ Andrew Ainslie
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16th April 2008, 17:42	#15 (permalink)
se2schul New Member Current Rebreather/s: RB80 / Clone Other Rebreather/s: RB80 / Clone Join Date: Oct 2007 Location: Ottawa, Canada Posts: 89	Re: Final Decompression Stop Depth Depends... 6m if I'm on oxygen. 3m if I'm on anything other than oxygen. For big dives, my last stop is often lying on the surface of the water breathing O2 for several minutes before climbing back on the boat.
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16th April 2008, 17:54	#16 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 2,066	Re: Final Decompression Stop Depth Quote: (Originally Posted by Stephane) Hi, I have just bought a HH controller and the last stop is at 3m. I personally would prefer to do the last stop at 6m but it's not an option on the computer. What do you do guys when you're following the deco on you computer? Do you still do the last stop deeper than what the computer says? Doesn't it take ages to clear the last stop? You still get credit for the stop at 20. You will still have to clear the last couple of minutes at 10 foot stop on the way up. However, if you ascend slowly, it doesn't add up to much extra. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
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16th April 2008, 18:22	#17 (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: 2,556	Re: Final Decompression Stop Depth I didnt vote. There wasn't a choice for "all of the above". Totaly depends on sea conditions. If its flat 3 if not maby 4.5 or 6. Last friday was a shot line ascent so i did it all at 8 ATB Mark __________________ 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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16th April 2008, 19:35	#18 (permalink)
Alkermes New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Join Date: Sep 2007 Location: Spain Posts: 25	Re: Final Decompression Stop Depth Mark, the SW does the option of making the last stop on 3, 4,5 or 6m?... Alkermes
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16th April 2008, 21:28	#19 (permalink)
Numpty diver Custom Title Allowed! Current Rebreather/s: Megalodon Other CCR Dolphin Ray Home Build Other Rebreather/s: Other CCR Dolphin Ray Home Build Join Date: Jul 2006 Location: Norway, Bergen Posts: 204	Re: Final Decompression Stop Depth I like 5m As last stop in Norway .. The lager n lime seems to be at 6ms The fresh water run off is from 3.5 up,,, bloody cold there 2/3 degrees in the water, possibly 0 degrees in the fjords. not nice on kit or me . Also another Reason being , if i loose my buoyancy during deco ill still be at 5.5 or 4.5.
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17th April 2008, 00:05	#20 (permalink)
doug allen New Member Current Rebreather/s: Optima Other Rebreather/s: Optima Join Date: Sep 2007 Location: Asheboro, NC Posts: 29	Re: Final Decompression Stop Depth 20'....just try 10'....the Rebreather will pump gas too you too fast...try not expelling gas around the mask, etc....plus, it is a bit hot at 10'...in warm waters. Of course, I'm speaking about the Optima....other systems may be different. Doug
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