DAN advocating using drysuit for buoyancy control while diving

[ScubaInChicago]

Sure did. It was the same stepwise changes I used in my example, to illustrate the point.


Because in your example you waited until you've reached 10m to inflate your DS. If you'd dived sensibly, you'd continually inflate and vent the suit to keep your suit's volume (and thus your buoyancy and squeeze) - wait for it...


wait...



wait....



*drum roll*



Constant.

Its hardly a constant when when you need to continuously add additional volume.

 

[Storker]

*sigh*
You don't add volume. You add gas molecules to keep a constant volume when the pressure increases.




Wait. You're trolling again, right?

 

[mmerriman]

if you've got a huge air bubble - you're overweighted.

 

[HungoverDiver]

Thank you Storker and Redshift ​for backing me up. You've saved me a lot of frustration!

 

[Omisson]

Its hardly a constant when when you need to continuously add additional volume.

You are not changing VOLUME but rather the number of molecules needed to maintain the SAME volume at different depths!

 

[rongoodman]

I've never been too impressed with the articles. Too bad we can't cancel the magazine and keep the insurance, sparing a few trees along the way.

 

[Storker]

I've never been too impressed with the articles. Too bad we can't cancel the magazine and keep the insurance, sparing a few trees along the way.

Well, that was refreshing. I'm not quite sure how it's relevant to the topic, but at least it was a change from the drivel we've been trying to debunk.

 

[rongoodman]

Well, that was refreshing. I'm not quite sure how it's relevant to the topic, but at least it was a change from the drivel we've been trying to debunk.

I was thinking about articles in the magazine not the news letter, I guess.

 

[Stoo]

Virtually everyone I dive with wears a drysuit and I think they all use the suit as primary buoyancy system.As others have pointed out, a properly weighted diver won't need much additional lift so that air in the suit is pretty minimal.. or it should be anyway.

I dive from my RHIB 99% of the time so the primary function of my wing is to float my double steel "xx"s at the surface while I climb into my boat. I also use it to fine-tune buoyancy as tank size changes, stage bottles come and go and undies change with season and depth of dive.

 

[cidcolada]

Part of the problem here is that when we refer to ".25ltr of gas @ 1ATA = .5ltr of gas @ 2ATA" we a using an incorrect unit of measure. In this example what is being discussed is "BAR/LTR" or "Barometric Litres". This is not a unit of volume, but a unit of mass refering to the number of gas molecules that occupy the same space as one litre of water (at 1ATA).