Flushing and Buoyancy Issues

***ScubaDadMiami*** · 27th March 2006, 05:12

Being a newbie, I am still wondering about my weighting. I don't seem to have a problem with my buoyancy during the dive, even when ascending and stopping, so long as I am at minimum loop volume. However, if I flush the loop, even if I squeeze the gas out while depressing the OPV and venting from the mouthpiece, there is still some increase in counterlung volume. The minute I have any extra gas in the counterlungs, I start to ascend, and I often have to kick to hold my position.

I am starting to wonder if I should add a little more weight to what I am already carrying. Shouldn't I be able to remain in a static position without having to work at it?

Any advice?

DaveB · 27th March 2006, 06:10

Well you might be light, but if you can stop on ascent then you are probably OK. When I flush I tend to dump from the counterlungs and breathe out before injecting gas (after a quick check to make sure the gas will inject!). If anything this makes me briefly negative.

***ScubaDadMiami*** · 27th March 2006, 06:20

Quote: (Originally Posted by DaveB)

Well you might be light, but if you can stop on ascent then you are probably OK. When I flush I tend to dump from the counterlungs and breathe out before injecting gas (after a quick check to make sure the gas will inject!). If anything this makes me briefly negative.

I'll give that a try. Thanks.

27th March 2006, 05:12	#1 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 1,896	Flushing and Buoyancy Issues Being a newbie, I am still wondering about my weighting. I don't seem to have a problem with my buoyancy during the dive, even when ascending and stopping, so long as I am at minimum loop volume. However, if I flush the loop, even if I squeeze the gas out while depressing the OPV and venting from the mouthpiece, there is still some increase in counterlung volume. The minute I have any extra gas in the counterlungs, I start to ascend, and I often have to kick to hold my position. I am starting to wonder if I should add a little more weight to what I am already carrying. Shouldn't I be able to remain in a static position without having to work at it? Any advice? __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
(Online)

27th March 2006, 06:10	#2 (permalink)
DaveB Rebreather World Writer Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Belper, Derbyshire, UK Posts: 88	Re: Flushing and Buoyancy Issues Well you might be light, but if you can stop on ascent then you are probably OK. When I flush I tend to dump from the counterlungs and breathe out before injecting gas (after a quick check to make sure the gas will inject!). If anything this makes me briefly negative. __________________ David
(Offline)

27th March 2006, 06:20	#3 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 1,896	Re: Flushing and Buoyancy Issues Quote: (Originally Posted by DaveB) Well you might be light, but if you can stop on ascent then you are probably OK. When I flush I tend to dump from the counterlungs and breathe out before injecting gas (after a quick check to make sure the gas will inject!). If anything this makes me briefly negative. I'll give that a try. Thanks. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
(Online)

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