Shaving Deco

Red Sea Explorer · June 1st, 2006, 08:23 PM

Hypothetical situation:

You are on a wreck at 60 meters in 10 degree water; you have been there for 35 minutes.

On the way out of the wreck your buddy rips a seal on his dry suit and it is flooded.

What do you do from a Deco perspective?

Which portions do you emphasize and what is the shape of the entire deco?

The idea is what you do if you have to cut your deco short.

*Richard Lundgren* · June 1st, 2006, 09:01 PM

Quote: (Originally Posted by Red Sea Explorer)

Hypothetical situation:

You are on a wreck at 60 meters in 10 degree water; you have been there for 35 minutes.

On the way out of the wreck your buddy rips a seal on his dry suit and it is flooded.

What do you do from a Deco perspective?

Which portions do you emphasize and what is the shape of the entire deco?

The idea is what you do if you have to cut your deco short.

This would be a cold experience. I would follow the original plan executing the deep stop phases and be very efficient during the intermediate stops and cut down the shallow stop. I would go before severe hypothermia kicks in. My brother ripped his suit going out from the deep part of the Plura cave system above the arctic circle, he claimed that it took him two days to get warm again:-). His team cut what they had to cut and did not get penalized for it luckily enough.

Take care
Richard Lundgren

caverkevin · June 1st, 2006, 10:25 PM

The other way to look at this is the amount of deco.

If you are diving wrecks. It may be a better idea to do two dives instead of a big dive. Limit the amount of deco exposure. I know this was how I handled diving the 2-4degree waters of the Great Lakes around Michigan in the US. Kept the run times limited to what I knew I could handle with a flooding suit.

Kevrumbo · June 2nd, 2006, 07:12 AM

What about shaving off some of the 18 or so minutes from the deep stop range of 36 to 24 meters? Get to your 21m Deco Bottle and do the full Profile from there to the Surface (and pray there's a thermocline with a much warmer upper level

! )

*peter_steinhoff* · June 2nd, 2006, 03:40 PM

I have on a couple occations, albeit much colder but with shorter BTs, been in similar situations. I have started out as planned and cut more and more of the stops the shallower I got with decent results. That is also my preference when shaving deco in general. Some accomodations for thermoclines, in water support etc might also affect the actual emergency plan.

One always need to consider a scenario like above planning dives in cold water. A suit failure may never happen to you but are you willing to bet your life on it?

Best,
Peter

Ahmed Adly, Marlin Inn DC · June 2nd, 2006, 04:46 PM

Quote: (Originally Posted by Richard Lundgren)

This would be a cold experience. I would follow the original plan executing the deep stop phases and be very efficient during the intermediate stops and cut down the shallow stop. I would go before severe hypothermia kicks in. My brother ripped his suit going out from the deep part of the Plura cave system above the arctic circle, he claimed that it took him two days to get warm again:-). His team cut what they had to cut and did not get penalized for it luckily enough.

Take care
Richard Lundgren

That story is COOL!!!!

June 1st, 2006, 08:23 PM	#1 (permalink)
Red Sea Explorer(Offline) New Member Join Date: Jan 2006 Location: Red Sea Posts: 236	Shaving Deco Hypothetical situation: You are on a wreck at 60 meters in 10 degree water; you have been there for 35 minutes. On the way out of the wreck your buddy rips a seal on his dry suit and it is flooded. What do you do from a Deco perspective? Which portions do you emphasize and what is the shape of the entire deco? The idea is what you do if you have to cut your deco short. __________________ You watch me switch. www.redseaexplorers.com

June 2nd, 2006, 03:40 PM	#5 (permalink)
peter_steinhoff(Offline) Instructor candidate Join Date: Dec 2005 Location: Sweden & Florida Posts: 205	I have on a couple occations, albeit much colder but with shorter BTs, been in similar situations. I have started out as planned and cut more and more of the stops the shallower I got with decent results. That is also my preference when shaving deco in general. Some accomodations for thermoclines, in water support etc might also affect the actual emergency plan. One always need to consider a scenario like above planning dives in cold water. A suit failure may never happen to you but are you willing to bet your life on it? Best, Peter __________________ Peter Steinhoff GUE DIR-F, Tech1, Tech2, Cave1, Cave2, Cave3, RB80-1&2, DIR-F/Cave Instructor Candidate. NAUI Tec Instructor (Trimix, Technical DPV, Technical Wreck Penenetration etc) WKPP Support Diver, Halcyon Product Development Team, Gavinscooter Representative. Various IANTD, NSS-CDS, NACD, PADI & NAUI. ---------------------------------------------- http://dir-diver.com http://peter.steinhoff.se (swedish only)

June 1st, 2006, 09:01 PM	#2 (permalink)
Richard Lundgren(Offline) GUE Instructor Join Date: Dec 2005 Location: Sweden Posts: 111	Quote: (Originally Posted by Red Sea Explorer) Hypothetical situation: You are on a wreck at 60 meters in 10 degree water; you have been there for 35 minutes. On the way out of the wreck your buddy rips a seal on his dry suit and it is flooded. What do you do from a Deco perspective? Which portions do you emphasize and what is the shape of the entire deco? The idea is what you do if you have to cut your deco short. This would be a cold experience. I would follow the original plan executing the deep stop phases and be very efficient during the intermediate stops and cut down the shallow stop. I would go before severe hypothermia kicks in. My brother ripped his suit going out from the deep part of the Plura cave system above the arctic circle, he claimed that it took him two days to get warm again:-). His team cut what they had to cut and did not get penalized for it luckily enough. Take care Richard Lundgren

June 1st, 2006, 10:25 PM	#3 (permalink)
caverkevin(Offline) Doing It Caverkevin Join Date: Nov 2005 Location: North Kackilackie Posts: 360	The other way to look at this is the amount of deco. If you are diving wrecks. It may be a better idea to do two dives instead of a big dive. Limit the amount of deco exposure. I know this was how I handled diving the 2-4degree waters of the Great Lakes around Michigan in the US. Kept the run times limited to what I knew I could handle with a flooding suit.

June 2nd, 2006, 07:12 AM	#4 (permalink)
Kevrumbo(Offline) New Member Join Date: Dec 2005 Location: El Segundo CA, South Santa Monica Bay, USA Posts: 133	What about shaving off some of the 18 or so minutes from the deep stop range of 36 to 24 meters? Get to your 21m Deco Bottle and do the full Profile from there to the Surface (and pray there's a thermocline with a much warmer upper level ! )

June 2nd, 2006, 04:46 PM	#6 (permalink)
Ahmed Adly, Marlin Inn DC(Offline) New Member Join Date: Feb 2006 Location: hurghada Posts: 849	Quote: (Originally Posted by Richard Lundgren) This would be a cold experience. I would follow the original plan executing the deep stop phases and be very efficient during the intermediate stops and cut down the shallow stop. I would go before severe hypothermia kicks in. My brother ripped his suit going out from the deep part of the Plura cave system above the arctic circle, he claimed that it took him two days to get warm again:-). His team cut what they had to cut and did not get penalized for it luckily enough. Take care Richard Lundgren That story is COOL!!!!