Guide to getting your weighting correct for a Rebreather.

***schford*** · 8th July 2005, 13:28

Quote: (Originally Posted by Philippe GERIN)

I'm truely interested to see how you tidy this on your kit. I guess it takes some practice deploying/stowing.
Best
Philippe

Hi Phillipe I will take some pictures but it is fairly neat and easy.

The hose goes down under 2 bungee cords, then back up, then down again and back up. So If I need to pull it out for myself I only pull out half of the hose, but for others they can pull it all out.

If you just pull half out then stowing it again is no difference to a normal length hose, and if someone else needed it and pulled it all out - I would not be that bothered about it looking all neat and tidy.

If you do not use 2m lengt hoses - how would you hand it off if you need to in a confined space or between your legs like you might need to in a cave of wreck?

Stuart

colinicky · 8th July 2005, 23:27

As a

(still doing the course ) I can understand going to freshwater but do you do this in your drysuit ,a wetsuit or godforbid nothing

.sorry if this sounds stupid but treat me gently after all i blame Chasey !

thanks
Colin

Barrie Law · 9th July 2005, 00:17

Colin
You can follow the same procedure in salt water, I think I've only ever dived a couple of times in fresh water on CCR.Do it with the kit you intend diving with.
The first 2 mtrs of descent on CCR tend to be the hardest and if it's easy you can probably drop a bit of weight, as with O/C you would only drop a KG at a time.
But you will go through this on the course!!!

Check you also do the following:

Strip the head and rebuild it, inc solonoid.

Strip the Handsets and magnet assembly.

Set the Interstage pressure on the 02 and Dill.

The above seem to be skipped by some instructors!!

Enjoy the rest of your course.

***EBT*** · 9th July 2005, 08:57

Quote: (Originally Posted by schford)

If you do not use 2m lengt hoses - how would you hand it off if you need to in a confined space or between your legs like you might need to in a cave of wreck?

Stuart

By passing off the stage, which is what prompted the comment in the first place.

Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off.

Weight for bare CCR, as pete says. Lifes easier if you keep it simple...

***schford*** · 10th July 2005, 19:34

Quote: (Originally Posted by wreckweasel)

By passing off the stage, which is what prompted the comment in the first place.

Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off.

Weight for bare CCR, as pete says. Lifes easier if you keep it simple...

Can you in a confined space?a reg and a hose is a lot smaller than a cylinder.....

***schford*** · 10th July 2005, 19:36

Quote: (Originally Posted by colinicky)

As a

(still doing the course ) I can understand going to freshwater but do you do this in your drysuit ,a wetsuit or godforbid nothing

.sorry if this sounds stupid but treat me gently after all i blame Chasey !

thanks
Colin

In a dry suit eg the normal configuration you use in the sea.

You can do it in the sea if you are next to a pontoon or something but fresh water tends to be a much more managebile location. Which I guess is why the HSE reccomend all training courses be donw inland.

Stuart

Gadget · 11th July 2005, 14:58

Quote: (Originally Posted by wreckweasel)

By passing off the stage, which is what prompted the comment in the first place.

Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off.

Weight for bare CCR, as pete says. Lifes easier if you keep it simple...

i agree that weighting with out stages a bare ccr is the best way to go, but then it is a matter of opinion in my mind why hand off your life support system, he should only be breathing 50% of it as you may then have a failure and what do you use. secondly whould they then hand the cylinder back to you! At least with a long hose you can control the situation you are the one with a breathable supply.

***EBT*** · 11th July 2005, 18:15

ok, since we're assuming this is done in overhead, Im assuming EVERY diver is carrying a tin of bailout mix breathable at max depth.

In the scenario where its tight and gnarly, where you suggest its too tight to pass off a stage, I'd suggest its far too tight for the other chap to secure your long hose.

As to the passing around of tins of gas... if you are team diving in some form, should a member of your team be on bailout, its generally accepted as wise that you SWAP your full tin of bailout for his when its half empty. Thus minimising the risk of him ever ending up with an empty tin of gas (passing restrictions etc).

Final comment. I carry bailout primarily to make me self sufficient.... and to minimise my need to impact anyone else in an emergency. As a secondary consideration its there for others to use. In an emergency, if a bailout was breathed dry, I'd ditch it. Thats why I weight for bare CCR.

Just my 2 sheckels...

LS_DK · 12th July 2005, 12:48

Hey Stuart,

Nice guide...

I am still a newbie, but have spent a couple of dives bailing out after 20-30 meter dives on a YBOD. I find it very difficult to empty my counter lungs completely when ascending during bail out. Hence I like to have a bit of extra weight to compensate for the residual gas in my CounterLungs. Also, if you are doing ascent on a DSMB, then being only slightly negative helps keeping the DSMB erect on the surface..
My 2 pennies worth...

Cheers,
Lasse (Med den gule kasse)

***Louby Lou*** · 17th July 2005, 22:30

Wraysbury was heaving today

But......................

I've managed to shed 10kgs!
I kid you not, I have gone down from 13kgs to 3 kgs

8th July 2005, 13:28	#11 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Quote: (Originally Posted by Philippe GERIN) I'm truely interested to see how you tidy this on your kit. I guess it takes some practice deploying/stowing. Best Philippe Hi Phillipe I will take some pictures but it is fairly neat and easy. The hose goes down under 2 bungee cords, then back up, then down again and back up. So If I need to pull it out for myself I only pull out half of the hose, but for others they can pull it all out. If you just pull half out then stowing it again is no difference to a normal length hose, and if someone else needed it and pulled it all out - I would not be that bothered about it looking all neat and tidy. If you do not use 2m lengt hoses - how would you hand it off if you need to in a confined space or between your legs like you might need to in a cave of wreck? Stuart
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8th July 2005, 23:27	#12 (permalink)
colinicky RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Mar 2005 Location: uk Posts: 681	numptie question ! As a (still doing the course ) I can understand going to freshwater but do you do this in your drysuit ,a wetsuit or godforbid nothing .sorry if this sounds stupid but treat me gently after all i blame Chasey ! thanks Colin
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9th July 2005, 00:17	#13 (permalink)
Barrie Law Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jun 2005 Location: Ireland Posts: 459	Weighting for Rebreather Colin You can follow the same procedure in salt water, I think I've only ever dived a couple of times in fresh water on CCR.Do it with the kit you intend diving with. The first 2 mtrs of descent on CCR tend to be the hardest and if it's easy you can probably drop a bit of weight, as with O/C you would only drop a KG at a time. But you will go through this on the course!!! Check you also do the following: Strip the head and rebuild it, inc solonoid. Strip the Handsets and magnet assembly. Set the Interstage pressure on the 02 and Dill. The above seem to be skipped by some instructors!! Enjoy the rest of your course.
(Offline)

9th July 2005, 08:57	#14 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 2,111	Quote: (Originally Posted by schford) If you do not use 2m lengt hoses - how would you hand it off if you need to in a confined space or between your legs like you might need to in a cave of wreck? Stuart By passing off the stage, which is what prompted the comment in the first place. Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off. Weight for bare CCR, as pete says. Lifes easier if you keep it simple... __________________ Eagles May Soar, but weasels don't get sucked into jet engines! RBW Terms of service
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10th July 2005, 19:34	#15 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Quote: (Originally Posted by wreckweasel) By passing off the stage, which is what prompted the comment in the first place. Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off. Weight for bare CCR, as pete says. Lifes easier if you keep it simple... Can you in a confined space?a reg and a hose is a lot smaller than a cylinder.....
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10th July 2005, 19:36	#16 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Quote: (Originally Posted by colinicky) As a (still doing the course ) I can understand going to freshwater but do you do this in your drysuit ,a wetsuit or godforbid nothing .sorry if this sounds stupid but treat me gently after all i blame Chasey ! thanks Colin In a dry suit eg the normal configuration you use in the sea. You can do it in the sea if you are next to a pontoon or something but fresh water tends to be a much more managebile location. Which I guess is why the HSE reccomend all training courses be donw inland. Stuart
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11th July 2005, 14:58	#17 (permalink)
Gadget Custom Title Allowed! Current Rebreather/s: Megalodon rEvo Dolphin Home Build Other Rebreather/s: rEvo Dolphin Home Build Join Date: May 2005 Location: Hoddesdon, Herts. Posts: 163	Quote: (Originally Posted by wreckweasel) By passing off the stage, which is what prompted the comment in the first place. Its a lot easier to swim that way, 2m hoses are a compromise to solve a problem with tanks that you can't pass off. Weight for bare CCR, as pete says. Lifes easier if you keep it simple... i agree that weighting with out stages a bare ccr is the best way to go, but then it is a matter of opinion in my mind why hand off your life support system, he should only be breathing 50% of it as you may then have a failure and what do you use. secondly whould they then hand the cylinder back to you! At least with a long hose you can control the situation you are the one with a breathable supply. __________________ Si Lawrence www.divehdi.com
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11th July 2005, 18:15	#18 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 2,111	ok, since we're assuming this is done in overhead, Im assuming EVERY diver is carrying a tin of bailout mix breathable at max depth. In the scenario where its tight and gnarly, where you suggest its too tight to pass off a stage, I'd suggest its far too tight for the other chap to secure your long hose. As to the passing around of tins of gas... if you are team diving in some form, should a member of your team be on bailout, its generally accepted as wise that you SWAP your full tin of bailout for his when its half empty. Thus minimising the risk of him ever ending up with an empty tin of gas (passing restrictions etc). Final comment. I carry bailout primarily to make me self sufficient.... and to minimise my need to impact anyone else in an emergency. As a secondary consideration its there for others to use. In an emergency, if a bailout was breathed dry, I'd ditch it. Thats why I weight for bare CCR. Just my 2 sheckels... __________________ Eagles May Soar, but weasels don't get sucked into jet engines! RBW Terms of service
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12th July 2005, 12:48	#19 (permalink)
LS_DK New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Mar 2005 Location: London, UK Posts: 37	Hey Stuart, Nice guide... I am still a newbie, but have spent a couple of dives bailing out after 20-30 meter dives on a YBOD. I find it very difficult to empty my counter lungs completely when ascending during bail out. Hence I like to have a bit of extra weight to compensate for the residual gas in my CounterLungs. Also, if you are doing ascent on a DSMB, then being only slightly negative helps keeping the DSMB erect on the surface.. My 2 pennies worth... Cheers, Lasse (Med den gule kasse)
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17th July 2005, 22:30	#20 (permalink)
*Louby Lou* XLVI WC! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Roman Corinium! Posts: 1,049	Wraysbury was heaving today But...................... I've managed to shed 10kgs! I kid you not, I have gone down from 13kgs to 3 kgs __________________ Miss Lou x Use of RBW is subject to the Rebreatherworld Terms and Conditions - Please read! Outlaw Divers - Sssh we're diving! You heff vays uff dealink vis zem, oh Miss RBW Admin! - Rob Davie Feb 06
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