Article in March 2006 issue of Scuba Diving

sytech@yahoo.com wrote:
> Was wondering what opinions people had about the article in March 2006
> issue of Scuba Diving, page 83, "The Final Ascent".
>
> The point the author makes is that "the trickiest part of your dive
> might come after the safety stop". Being a relative newbie I
> certainly have to defer to the author but there was a sense I had that
> there may have been a bit of overstating certain "potential" problems.
>
> Was wondering what you more experienced folks thought.
>
> Sy
>
biggest pressure change

sytech@yahoo.com wrote:
> Was wondering what opinions people had about the article in March 2006
> issue of Scuba Diving, page 83, "The Final Ascent".
>
> The point the author makes is that "the trickiest part of your dive
> might come after the safety stop". Being a relative newbie I
> certainly have to defer to the author but there was a sense I had that
> there may have been a bit of overstating certain "potential" problems.
>
> Was wondering what you more experienced folks thought.
>
> Sy
>
biggest pressure change

sytech@yahoo.com wrote:
> Was wondering what opinions people had about the article in March 2006
> issue of Scuba Diving, page 83, "The Final Ascent".
>
> The point the author makes is that "the trickiest part of your dive
> might come after the safety stop". Being a relative newbie I
> certainly have to defer to the author but there was a sense I had that
> there may have been a bit of overstating certain "potential" problems.
>
> Was wondering what you more experienced folks thought.
>
> Sy
>
biggest pressure change

<sytech@yahoo.com> pounded away at his keyboard resulting in:
:Was wondering what opinions people had about the article in March 2006
:issue of Scuba Diving, page 83, "The Final Ascent".
:
:The point the author makes is that "the trickiest part of your dive
:might come after the safety stop". Being a relative newbie I
:certainly have to defer to the author but there was a sense I had that
:there may have been a bit of overstating certain "potential" problems.
:
:Was wondering what you more experienced folks thought.

I didn't read the article. If the author said words to the effect of
"the reason the final 15 or so ft of your ascent is riskiest is
because that is when the air in your body expands by the greatest
percentage", I agree.

Dan Bracuk
If we don't succeed, we run the risk of failure.

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<sytech@yahoo.com> pounded away at his keyboard resulting in:
:Was wondering what opinions people had about the article in March 2006
:issue of Scuba Diving, page 83, "The Final Ascent".
:
:The point the author makes is that "the trickiest part of your dive
:might come after the safety stop". Being a relative newbie I
:certainly have to defer to the author but there was a sense I had that
:there may have been a bit of overstating certain "potential" problems.
:
:Was wondering what you more experienced folks thought.

I didn't read the article. If the author said words to the effect of
"the reason the final 15 or so ft of your ascent is riskiest is
because that is when the air in your body expands by the greatest
percentage", I agree.

Dan Bracuk
If we don't succeed, we run the risk of failure.

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

<sytech@yahoo.com> pounded away at his keyboard resulting in:
:Was wondering what opinions people had about the article in March 2006
:issue of Scuba Diving, page 83, "The Final Ascent".
:
:The point the author makes is that "the trickiest part of your dive
:might come after the safety stop". Being a relative newbie I
:certainly have to defer to the author but there was a sense I had that
:there may have been a bit of overstating certain "potential" problems.
:
:Was wondering what you more experienced folks thought.

I didn't read the article. If the author said words to the effect of
"the reason the final 15 or so ft of your ascent is riskiest is
because that is when the air in your body expands by the greatest
percentage", I agree.

Dan Bracuk
If we don't succeed, we run the risk of failure.

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

Joe English wrote:

> sytech@yahoo.com wrote:
>
>> Was wondering what opinions people had about the article in March 2006
>> issue of Scuba Diving, page 83, "The Final Ascent".
>>
>> The point the author makes is that "the trickiest part of your dive
>> might come after the safety stop". Being a relative newbie I
>> certainly have to defer to the author but there was a sense I had that
>> there may have been a bit of overstating certain "potential" problems.
>>
>> Was wondering what you more experienced folks thought.
>>
>> Sy
>>
> biggest pressure change

Didn't see the article, but I can guess...

When you ascend from, say, 99 fsw to 66 fsw the pressure change
is from about 59 psi to about 44 psi, a one-quarter reduction
which will result in a 25% expansion of the air in yer lungs.

But when you ascend from, say, 33 fsw to the surface the
pressure change is from about 29.4 psi to about 14.7 psi and the
halving of pressure will double the volume of air in yer lungs
in the same 33 feet of ascent.

Just like English says.

Most new divers lack the buoyancy control to make a very slow,
controlled ascent from shallow depths (remember that the volume
of air in yer BC also doubles from 33 fsw to the surface!) and
risk all kinds of nastiness of the lungs and ears by popping to
the surface.

I start my safety stop at 20' and ascend about 3'/minute to 10'.
From 10' it takes me about two minutes to reach the surface.
Learn to do that and you will avoid lung expansion problems and
greatly improve yer overall buoyancy control.

m

Joe English wrote:

> sytech@yahoo.com wrote:
>
>> Was wondering what opinions people had about the article in March 2006
>> issue of Scuba Diving, page 83, "The Final Ascent".
>>
>> The point the author makes is that "the trickiest part of your dive
>> might come after the safety stop". Being a relative newbie I
>> certainly have to defer to the author but there was a sense I had that
>> there may have been a bit of overstating certain "potential" problems.
>>
>> Was wondering what you more experienced folks thought.
>>
>> Sy
>>
> biggest pressure change

Didn't see the article, but I can guess...

When you ascend from, say, 99 fsw to 66 fsw the pressure change
is from about 59 psi to about 44 psi, a one-quarter reduction
which will result in a 25% expansion of the air in yer lungs.

But when you ascend from, say, 33 fsw to the surface the
pressure change is from about 29.4 psi to about 14.7 psi and the
halving of pressure will double the volume of air in yer lungs
in the same 33 feet of ascent.

Just like English says.

Most new divers lack the buoyancy control to make a very slow,
controlled ascent from shallow depths (remember that the volume
of air in yer BC also doubles from 33 fsw to the surface!) and
risk all kinds of nastiness of the lungs and ears by popping to
the surface.

I start my safety stop at 20' and ascend about 3'/minute to 10'.
From 10' it takes me about two minutes to reach the surface.
Learn to do that and you will avoid lung expansion problems and
greatly improve yer overall buoyancy control.

m

Joe English wrote:

> sytech@yahoo.com wrote:
>
>> Was wondering what opinions people had about the article in March 2006
>> issue of Scuba Diving, page 83, "The Final Ascent".
>>
>> The point the author makes is that "the trickiest part of your dive
>> might come after the safety stop". Being a relative newbie I
>> certainly have to defer to the author but there was a sense I had that
>> there may have been a bit of overstating certain "potential" problems.
>>
>> Was wondering what you more experienced folks thought.
>>
>> Sy
>>
> biggest pressure change

Didn't see the article, but I can guess...

When you ascend from, say, 99 fsw to 66 fsw the pressure change
is from about 59 psi to about 44 psi, a one-quarter reduction
which will result in a 25% expansion of the air in yer lungs.

But when you ascend from, say, 33 fsw to the surface the
pressure change is from about 29.4 psi to about 14.7 psi and the
halving of pressure will double the volume of air in yer lungs
in the same 33 feet of ascent.

Just like English says.

Most new divers lack the buoyancy control to make a very slow,
controlled ascent from shallow depths (remember that the volume
of air in yer BC also doubles from 33 fsw to the surface!) and
risk all kinds of nastiness of the lungs and ears by popping to
the surface.

I start my safety stop at 20' and ascend about 3'/minute to 10'.
From 10' it takes me about two minutes to reach the surface.
Learn to do that and you will avoid lung expansion problems and
greatly improve yer overall buoyancy control.

m

"Joe English" <joeenglish2@wisperhome.com> wrote in message
news:444ec8e9$0$5100$ec3e2dad@news.usenetmonster.c om...
> sytech@yahoo.com wrote:
>> Was wondering what opinions people had about the article in March 2006
>> issue of Scuba Diving, page 83, "The Final Ascent".
>>
>> The point the author makes is that "the trickiest part of your dive
>> might come after the safety stop". Being a relative newbie I
>> certainly have to defer to the author but there was a sense I had that
>> there may have been a bit of overstating certain "potential" problems.
>>
>> Was wondering what you more experienced folks thought.
>>
>> Sy
>>
> biggest pressure change

Biggest PERCENTAGE pressure change.

Pressure change, in absolute ATM, is same from 100 to 85 as it is from 15 to
0 fsw.

According to the BASOD agency, you should bolt as quick as possible from
your last safety stop to the boat deck, so you'll be the first grabbing a
beer from the cooler.