dealing with a side mounted BOB

Marc T · 17th November 2007, 18:42

Since I decided to give up my bulky but very easy to dive double breather ( not the only one as I can see on various, including Dr Mike's one ), I feel a little bit unconfortable to deal with the buoyancy of with my sidemounted BOB when ascending.
I RD dive only in cave diving and wear my sidemounted over the soulder à la Fred Badier ou Xavier Menniscus because the WOB is far better that way

Found two easy to dive solutions, regarding buoyancy prob:
- breathing on the sidemount several time during the dive and more specially on ascent.
- permanently compressing the BOB's counterlung (in my case by putting the breathing hoses inside the BOB as its possible with the design of my home made sidemounted ), so no more buoyancy prob at all but impossible to test the BOB during the dive ( just trust in it

) and I need few seconds for bailout so its more a deco only BOB.

Is it really necessary to say hat Im not completelly pleased with these solutions?

Any help wellcome more specially from who use a sidemounted BOB and dont bin it

.

Cheers

Marc

Well

wARNY jIM · 17th November 2007, 20:37

Hi Marc

I use my Joki on biger dives as bailout for my MEG.
I had the same problems as you described.
I was thinking of a solution after seeing an artikle on the KISS BOB from Gordon Smith. The counterlung had some kind of jaket around the couterlung when it is not in use. If you could design some kind of ripcord around your counterlung to reduce its volume when its not in use, so the boyancy changes will be less i think it would make it easyer to manage. And you can still switch to the BOB to chek Adv integrety and sanety breaths without pulling the ripcord. The only thing the ADV would have to be a diadhram type.
I have yet to try this out my self.

Safe diving

Jim

PaulTG2 · 17th November 2007, 23:23

Hello,

Interesting... For some reason this has been crossing my mind for a week or so. I have some Azimuth parts and was thinking of a BOB. I was going to change the counter lungs to water bags, wrap them around the azimuth canister with a nylon cover secured with Velcro. The Velcro strap would also secure the DSV. Grabbing the DSV would undo the Velcro and frees the counterlungs for use. To stow just wrap the cover and secure the Velcro.

A pressure activated ADV and standard OPV and the buoyancy issues should be minimized.

hmm.....

-p

17th November 2007, 18:42	#1 (permalink)
Marc T hell is in the details Current Rebreather/s: RB80 / Clone Home Build Other Rebreather/s: Not Bought Yet RB80 / Clone Home Build Join Date: Sep 2005 Location: FRANCE Carcassonne Posts: 433	dealing with a side mounted BOB Since I decided to give up my bulky but very easy to dive double breather ( not the only one as I can see on various, including Dr Mike's one ), I feel a little bit unconfortable to deal with the buoyancy of with my sidemounted BOB when ascending. I RD dive only in cave diving and wear my sidemounted over the soulder à la Fred Badier ou Xavier Menniscus because the WOB is far better that way Found two easy to dive solutions, regarding buoyancy prob: - breathing on the sidemount several time during the dive and more specially on ascent. - permanently compressing the BOB's counterlung (in my case by putting the breathing hoses inside the BOB as its possible with the design of my home made sidemounted ), so no more buoyancy prob at all but impossible to test the BOB during the dive ( just trust in it ) and I need few seconds for bailout so its more a deco only BOB. Is it really necessary to say hat Im not completelly pleased with these solutions? Any help wellcome more specially from who use a sidemounted BOB and dont bin it . Cheers Marc Well
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17th November 2007, 20:37	#2 (permalink)
wARNY jIM New Member Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Other CCR Join Date: Jun 2005 Location: Ireland Co Clare Posts: 11	Re: dealing with a side mounted BOB Hi Marc I use my Joki on biger dives as bailout for my MEG. I had the same problems as you described. I was thinking of a solution after seeing an artikle on the KISS BOB from Gordon Smith. The counterlung had some kind of jaket around the couterlung when it is not in use. If you could design some kind of ripcord around your counterlung to reduce its volume when its not in use, so the boyancy changes will be less i think it would make it easyer to manage. And you can still switch to the BOB to chek Adv integrety and sanety breaths without pulling the ripcord. The only thing the ADV would have to be a diadhram type. I have yet to try this out my self. Safe diving Jim
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17th November 2007, 23:23	#3 (permalink)
PaulTG2 Custom Title Allowed! Current Rebreather/s: Megalodon Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Mar 2006 Location: Virginia, USA Posts: 325	Re: dealing with a side mounted BOB Hello, Interesting... For some reason this has been crossing my mind for a week or so. I have some Azimuth parts and was thinking of a BOB. I was going to change the counter lungs to water bags, wrap them around the azimuth canister with a nylon cover secured with Velcro. The Velcro strap would also secure the DSV. Grabbing the DSV would undo the Velcro and frees the counterlungs for use. To stow just wrap the cover and secure the Velcro. A pressure activated ADV and standard OPV and the buoyancy issues should be minimized. hmm..... -p
(Offline)

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