Improving buoyancy.

Does anyone know of a site with the exercises for the PADI Peak Performance
Buoyancy module? or another site on improving buoyancy control.

thanks

On Thu, 08 Jul 2004 15:15:53 GMT, "Clive M" <cliveM@hotmail.com>
wrote:

>Does anyone know of a site with the exercises for the PADI Peak Performance
>Buoyancy module? or another site on improving buoyancy control.
>
>thanks
>

Before everyone else says it: dive. It's only with practice that
you'll improve.

OK, that and make sure you're not overweighted.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

Clive M <cliveM@hotmail.com> wrote:

> or another site on improving buoyancy control.

It's slightly catch 22.

You really don't learn buoyancy until you are doing stops
without a blob (I like to just watch the guy reeling unless
we've promised the skipper one blob per diver) but you
don't want to do stops if you can't do buoyancy.

The best exercise is to do dives without touching anything.
Once you start doing that you will be horrified at seeing people
blunder into things.

nigelH

"Clive M" wrote

> Does anyone know of a site with the exercises for the PADI Peak
Performance
> Buoyancy module? or another site on improving buoyancy control.

The best site for learning buoyancy control is the nearest dive site. Step
one is learning you need to improve. Many people never get that far. Step
two is minimizing your weight, reducing it to just what you need for the
dives you do and the equipment, including thermal protection, you use. Step
three is to dive . . . the more the better. The final step is to recheck
your weighting occasionally. Your needs do change as you gain experience
and become more comfortable in the water.

"Clive M" <cliveM@hotmail.com> wrote in message
news:JydHc.1189$WF3.11215983@news-text.cableinet.net...
> Does anyone know of a site with the exercises for the PADI Peak
Performance
> Buoyancy module? or another site on improving buoyancy control.
>
> thanks
>
>

The PADI peak what? :O

I think this is taking the "Web Diver" philosophy a little too far....

You need to be correctly weighted.
You need to be correctly trimmed
You need to practice.

I think best method to do this involves dive kit, a buddy and H20.

Just my thoughts...

/mattD
http://diving-in-norway.com

> I think this is taking the "Web Diver" philosophy a little too far....
>
> You need to be correctly weighted.
> You need to be correctly trimmed
> You need to practice.
>
for mathematicians then.
if I am weighted with lots of lead and able to maintain neutral buoyancy
with lots of gas in the wing, will inhaling a lung full of air give the same
amount of lift. I was thinking yes it give the same lift but the time taken
to begin to ascend would faster for the small mass.

David

"david" wrote

> > I think this is taking the "Web Diver" philosophy a little too far....
> >
> > You need to be correctly weighted.
> > You need to be correctly trimmed
> > You need to practice.
> >
> for mathematicians then.
> if I am weighted with lots of lead and able to maintain neutral buoyancy
> with lots of gas in the wing, will inhaling a lung full of air give the
same
> amount of lift. I was thinking yes it give the same lift but the time
taken
> to begin to ascend would faster for the small mass.

First, I don't think having lots of lead and lots of gas in the wing
qualifies as "correctly weighted." In general, correctly weighted means you
have the least amount of weight that will allow you to be neutral at the
surface (some say at your shallowest stop) with all tanks as near empty as
you expect they'll get, with the minimum gas in your BCD and/or drysuit.
The more gas you have to have in your wing/drysuit, the more buoyancy shift
as you ascend or descend and the harder good buoyancy control is.

Having said that, the answer to your question is that inhaling a lung full
of air will give the same amount of lift at the same depth. The last part
is important since, as that lift causes your depth to change, the more the
gas you have in flexible containers, including your lungs, the more
expansion you get and the more your buoyancy shifts. As you ascend, the
effect continues, not only increasing your lift further, but doing so at an
increasing rate.

Lee

david wrote:
> for mathematicians then.
> if I am weighted with lots of lead and able to maintain neutral buoyancy
> with lots of gas in the wing, will inhaling a lung full of air give the same
> amount of lift. I was thinking yes it give the same lift but the time taken
> to begin to ascend would faster for the small mass.

The mass is virtually irrelevant in water as the viscous drag
masks any inertial effects. The real snag is that the more
air you carry in your suit and wing the greater the change of
buoyancy as you go up and down. A diver is always unstable
in that as we ascend we become more buoyant but if we are
reasonably weighted it is manageable. If you are overweighed
it may be manageable deep but shallow it is always trying to
run away with you. Ironically it is deep divers who suffer
the most from this as they spend a lot of time hanging about
shallow.

nigelH
I might be a mathematician but I hold that anything that
happened at the University of Sussex in the 60s is
inadmissible evidence.

"Nigel Hewitt" wrote

> The mass is virtually irrelevant in water as the viscous drag
> masks any inertial effects. The real snag is that the more
> air you carry in your suit and wing the greater the change of
> buoyancy as you go up and down. A diver is always unstable
> in that as we ascend we become more buoyant . . . .

Context, Nigel, context. Both wet and drysuit divers are always unstable.
Those diving with no gas in their wing and no thermal protection can become
quite stable. Yes, I know this is UKRS. Still, some of you guys see warm
water occasionally too.

Lee

Lee Bell <leebell@ix.remove.netcom.com> wrote:

> "Nigel Hewitt" wrote
>
>> The mass is virtually irrelevant in water as the viscous drag
>> masks any inertial effects. The real snag is that the more
>> air you carry in your suit and wing the greater the change of
>> buoyancy as you go up and down. A diver is always unstable
>> in that as we ascend we become more buoyant . . . .
>
> Context, Nigel, context. Both wet and drysuit divers are always unstable.
> Those diving with no gas in their wing and no thermal protection can become
> quite stable. Yes, I know this is UKRS. Still, some of you guys see warm
> water occasionally too.

The context was he said more weight would make things happen slower
and I resisted posting "ROTFL" and tried to explain why this wouldn't be so.

nigelH