HDTenEightyP/NetNews huggingface dataset:
From: peterson@hpl.hp.com (Chris Peterson)
Subject: Re: A note on using computers for decompression diving
Date: Tue, 21 Jul 1992 17:11:56 GMT
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <1992Jul21.030125.14659@herboid.uucp> adb@herboid.uucp (Anthony DeBoer) writes:
>In <930544@hp-ptp.ptp.hp.com> davew@hp-ptp.ptp.hp.com (Dave Waller) writes:
>>Or, if you can afford it, carry a backup computer. I, and several other regular
>>contributors here carry EIT/Orca Delphi's as our primary instruments, with
>>a Skinny Dipper in the BC pocket as a backup, since htey both use the same
>>decompression model.
>
>Sorry if I've missed this if it's come up before, but why would you want
>your two computers to use the same model?  I know a pair of divers who both
>dive to the ragged limits of their computers (although they do claim they
>took a day off from a down-south trip once after they got into 40-foot
>decompression stops), and they deliberately bought two different units and
>stay with whichever one is more conservative at the moment.  The other will
>happily handle not ascending as quickly as it says you could; that's the
>whole principle behind computer-assisted multi-level diving.
>
>The one reason I could see for using identical models is that if a different
>computer tucked away in your BC pocket turned out to be more conservative
>in a given situation and you unknowingly blew its decompression ceiling
>while following your other computer, it could throw an electronic tantrum
>(I hear some models do) and not want to track your subsequent diving, or
>incorrectly recover from the situation.  Is this the reason?
>-- 
>Anthony DeBoer   NAUI # Z8800, D5482 | Why watch TV, when Netnews provides
>adb@herboid.uucp | adb@geac.com      | 100% of your daily requirement for
>uunet!geac!!herboid!adb              | trivia and meaningless entertainment?

I dive with a backup to my computer (a second computer, or depth guage + timer)
in case the computer breaks down during the dive (mechanical or electrical).
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA
                                                   peterson@peterson.hpl.hp.com
From: joseph@shogun.smos.com (Joseph Crunk)
Newsgroups: rec.scuba
Subject: Leopard Shark school ...
Date: 23 Jul 92 23:56:38 GMT


# >	While diving this past weekend at Copper roof in Carmel bay Ca,
# >I had the chance to see 20 or so 4 to 5 foot long Leopard sharks. I

# I sure didn't see *20* of 'em, but my buddy and I saw one at Pescadero Pt.,
# not far from there on July 4th.  El Nino again I suspect.

Probably not. We're getting real close to their breeding season. We
should be see more and more of them up until the end of Aug - beginning
of Sept. As a matter of fact, there's supposed to be a place at Pt Lobos
were you can sit and watch them schooling. You might call there and ask
when and where. Maybe even go dive the spot, if it's not restricted. :-)

They're suposed to be good eating, something along the lines of salmon.
The problem I have is with the minimun size limit...36 inches. With
refraction that comes in at 45 inches!...that's bigger than my spear. :-)


-Joseph Crunk
From: peterson@hpl.hp.com (Chris Peterson)
Newsgroups: rec.scuba
Subject: Re: Are ther YMCA dive agencies in Australia ?
Date: 21 Jul 92 17:44:45 GMT
Article-I.D.: hplabsz.1992Jul21.174445.6501
Distribution: na
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <1992Jul21.122819.1@scivax.stsci.edu> clampin@scivax.stsci.edu writes:
>With regard to this comment on the British Sub-Aqua Club (BSAC)...........
>> 
>> I trust you pay for the "free" training through club dues and/or club
>> fundraisers and/or by getting the instructors to volunteer their efforts?
>> 
>
>In all the BSAC clubs in which I was a member the club dues never amounted
>to even a fraction of what it costs to get an intructor cert. with PADI, 
>NAUI etc. Furthermore, BSAC members do the instructor certification 
>(3 levels; Club, Advanced and National) because they WANT TO teach, either 
>at branch or national level. BSAC instructor certifications are not primarily
>intended to be a career path, they are for people who wish to improve the 
>standard of their own diving and contribute to the sport. 

I think most instructors complete their certifications "because they WANT TO
teach".  It's too rigorous for just monetary motivation.  Many instructors
who paid "big bucks" for their certification don't work at it full time; they
work to "break even" (see post from DeBoer).  I've heard that most divers have 
spent about $10,000 on SCUBA -- starting with their first OW class -- by the
time they qualify for an instructor training course.  IMHO, any diver 
who wants to become an instructor should agressively "improve the standard of
their own diving and contribute to the sport" -- or stop diving.
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA
                                                   peterson@peterson.hpl.hp.com
Newsgroups: rec.scuba
From: archer@rx.xerox.com (       Stephen Archer, CSS)
Subject: Re: gif picture of soft coral in alt.binar
Reply-To: archer@rx.xerox.com
Organization: Rank Xerox Ltd.
Date: Tue, 21 Jul 1992 13:22:10 GMT


Yep I missed it too.

Rogier,
Any chance you could re-post this and maybe a couple of others to this group.

cheers
Stephen
archer.sbde@rx.xerox.com
Newsgroups: rec.scuba
From: barker@saipan.wri.com (Harold Barker)
Subject: Info request
Organization: Wolfram Research, Inc.
Date: Tue, 28 Jul 1992 22:53:20 GMT





I am looking for any info on dive shops in the Greek islands.  I plan to  
be in the area  on business in about one month.

Thanks
harold




--
Work            voice   217-398-0700  |   Home
barker@wri.com  fax     217-398-0747  |   barker@rhiannon.wri.com
NeXT Mail accepted                    |   NeXT Mail accepted
--------------------------------------|-----------------------------------
Newsgroups: rec.scuba
From: dunbar@boulder.Colorado.EDU (S Dunbar)
Subject: Re: Sea Wasps
Organization: University of Colorado, Boulder
Date: 27 Jul 92 20:01:16 GMT

>Anyone allergic to bee stings needs to be concerned with sea wasps, as they
>can create a severe allergic reaction that can be fatal.

>If you have EVER experienced swelling from a bee sting that is any more than
>normal you need to assume a 'full-body' reaction to even a brief, minor
>encounter with a sea wasp. Be prepared. There's no way to know if or when
>you will go to a 'full-body' reaction (Vasogenic Shock, refered to as
>Anaphalactic Shock). It's not a pleasant way to go. It rates up there with
>burning to death as my favorite way to die :-(

>If you do react, and it's quite possible if you're in any way allergic to
>bees, it will probably be fatal without immediate/prompt medical attention.

>When boat diving in areas where sea wasp are expected, make sure the boat
>has a working 'diver recall' system. If someone surfaces with sea wasp wounds
>and are headed toward Anaphalactic Shock, the boat will need to go NOW!!!
>All divers need to get on that boat ASAP!!!

>From a preventitive angle, these critters usually hangout within 10-15 feet
>of the surface. When ascending to the surfacing, purge a regulator for a couple
>of seconds (from a depthof 25-30 ft).  The rising/expanding air will harmlessly
>push these fellows away, making a 'hole' for you to ascend in :-)

>-Joseph Crunk
i have never seen these critters, but my wife is allergic to bee stings,so
when we go diving in the future, i will bring her epi pen which is a kit
that contains epinephrine in it to counter act the affects of
anaphalactic shock, these kits are easy to get from your doctor and 
need a prescrition at the pharmacy

scott
 
Scott\      /\/\  /|email: dunbar@boulder.colorado.edu
  /***\  /\/*/**\/*|Department of Molecular, Cellular, and Developmental Biology
 /  /\ \/**\/    \ |University of Colorado at Boulder, Boulder, CO  80309-0347
Newsgroups: rec.scuba
From: sdodd@OES.ORST.EDU (Stephen M Dodd)
Subject: Re: Instructor/Agency Accountability
Organization: Oregon Extension Service, Oregon State University, Corvallis, Or.
Date: Sat, 25 Jul 1992 06:12:17 GMT

In article <1992Jul24.212026.6623@dale.ksc.nasa.gov> sdavis@laforge.ksc.nasa.gov (Steve Davis) writes:
>
>  It seems to me that the role of a salesman can be in direct conflict with  
>that of an instructor, and that the two should never be mixed.  What are the  
>positions of the certification agencies on this?  This shop is a "PADI 5-star  
>Diving Center," which I'm beginning to read as, "Spend all of you money here."  
>
>  Comments?
>

   I've seen a lot of that in shops around here.  The competition gets
   almost religious.  It is perhasp at the real root of my resistance to
   the "buy it at a real dive store", rather than mail order arguments
   on the net.  Someone expressed the concept to me that a similar close
   connection between stores and clients in extream loyalty postures has
   been eviden among skate boarders.  I was told of this as it was
   obvious to the speaker that the diving crowd seemed similar.  I for one
   have responded with a strong sense of independance in all decisions I
   make related to diving.  perhaps that is good ...

   Steve

>--
>+----------------------------------------------------------------+
>| Steve Davis                      | sdavis@laforge.ksc.nasa.gov |
>| NASA, DL-DSD-32                  | (NeXT Mail preferred)       |
>| Kennedy Space Center, FL  32899  |                             |
>| (407)867-7582  fax:(407)867-2173 | #include <disclaimer.h>     |
>+----------------------------------------------------------------+


-- 
- Stephen M. Dodd, System Analyst, Oregon Extension Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sdodd@oes.orst.edu          Internet          Oregon State University
503-737-0699                                  Corvallis, OR 97331
From: joseph@shogun.smos.com (Joseph Crunk)
Newsgroups: rec.scuba
Subject: Jade Cove, Calif
Date: 23 Jul 92 18:41:59 GMT


I thougt I'd give the kelp another couple weeks to thicken up
then head for Jade Cove. Does anyone have any experience with
diving there?

I've read several reviews in dive rags but I've yet talk with
anyone that's actually been there. (there's probably a reason)

What I do expect is a long hike, steep climb, exposed ocean,
thick kelp, and 9000 lb jade boulders. So far it sounds like
fun. :-)

Any other input would be welcomed.

-Joseph Crunk
From: morley@Apple.COM (John Morley)
Newsgroups: rec.scuba
Subject: Re: Diving headaches
Summary: That'll give you a real headache!
Date: 30 Jul 92 03:47:59 GMT
Organization: Apple Computer Inc., Cupertino, CA

In article <1992Jul30.021402.20788@nuscc.nus.sg>, ccechk@nuscc.nus.sg (Heng Kek) writes:
> I'm a relatively new diver (NAUI OW1 Apr92) and experience headaches
> when I'm down after a while.  I've been told by an assistant
> instructor that it is because I tend to hold my breath.  Well, I DO
> try to breathe slowly and may unconsciously hold my breath at times.
> 
> But my question is, how does holding one's breath underwater while
> scuba-diving cause headaches?  
> 
> I imagine it would have something to do with Nitrogen in the blood.
> Any enlightenment would be most appreciated.
> 
> Kek

I'm surprised that the assistant didn't explain to you why holding your breath
while on scuba is a VERY BAD idea.  If your depth suddenly changes the delicate
alveoli in your lungs can tear, releasing gas bubbles into your bloodstream
that will wind up in your head and give you one helluva headache that might
be your last :-{.

What the assistant was probably referring to is shallow breathing.  Some
people get nervous when they start on scuba and they unconsciously breath
much more shallowly then they ordinarily would.  This leads to a lack of
CO2 exchange out of your blood which I believe can cause a headache as one
of its symptoms.

Nitrogen on the other hand at sufficient partial pressures can be quite the
analgesic (pain killer), although you have to watch out for sudden urges to
take out your knife and cut the stupid regulator hose that keeps getting in
your way :-}.  Safe Diving!

- John

*******************************************************************************
* Std Disclaimer:   My opinions are mine.        |  Billboard seen next to a  *
*                   Apple's opinions are Apple's.|  cemetary said:            *
*                   Sometimes they are similar.  |  "If you were dead,        *
*                   Sometimes they are not.      |   you'd be home by now."   *
*******************************************************************************
From: dave@hpdstma.hpl.hp.com (Dave Waller)
Newsgroups: rec.scuba
Subject: Re: Diving headaches
Date: 30 Jul 92 15:57:36 GMT
Article-I.D.: scd.Bs7Lo1.I4H
Organization: Hewlett Packard

In article <1992Jul30.021402.20788@nuscc.nus.sg>, ccechk@nuscc.nus.sg (Heng Kek) writes:
|> I'm a relatively new diver (NAUI OW1 Apr92) and experience headaches
|> when I'm down after a while.  I've been told by an assistant
|> instructor that it is because I tend to hold my breath.  Well, I DO
|> try to breathe slowly and may unconsciously hold my breath at times.
|> 
|> But my question is, how does holding one's breath underwater while
|> scuba-diving cause headaches? 

The most common reason for headaches while diving is a condition called
hypercapnea, which is the name for excessive levels of CO2 in the bloodstream.
While breathing air under pressure, the CO2 gradient across the alveolar
membrane in the lungs is reduced due to the higher partial pressure of the
trace CO2 already present in inspired gas, making it more difficult for your
lungsto remove CO2 from your bloodstream. Holding you breath exacerbates this
condition substantially, as while you hold your breath the CO2 levels in the
gas contained in your lungs increases markedly, causing a further concomitant
decrease in the CO2 gradient.

The end result of all this is that CO2 levels in the bloodstream rise enough
to interfere with the normal metabolic gas exchange by the respiration of
cells, and this manifests itself as a headache in the brain.

You can prevent this condition by remembering to ALWAYS breath normally while
on SCUBA. If you are trying to control your consumption and make it more
efficient, you are better off moderating your rate of inhalation, while still
exhaling normally. I use about a 2:1 inhale/exhale time ratio, and this
works pretty well for me.

The key here is remembering that, the longer you keep inhaled air in your
lungs, the more CO2 you are allowing to build up in the bloodstream that is
not adequately ventilated.

One further note: Divers who have gained good control of their breathing under
"rest" conditions while SCUBA diving frequently experience hypercapnea when
placed under a physical load (swimming fast after game, or against a current
for example). This is because they have become so habitual in breathing
slowly that they fight the urge to breath more rapidly when under a physical
load. This is a Bad Idea (tm). If you are under a heavy physical load, forget
about trying to squeeze every second out of your tank, and simply breath as
you would on the surface when physically challenged. Your body needs the
oxygen and needs to get rid of the higher CO2 production in such a case --
give it what it's asking for.

Dave Waller
YMCA Instructor
Newsgroups: rec.scuba
From: zwbm07@hou.amoco.com (Walter Moore)
Subject: Difference between the NASDS/SSI/PADI/NAUI/YMCA Advanced?
Reply-To: zwbm07@hou.amoco.com
Organization: Amoco
Date: Thu, 30 Jul 1992 18:35:41 GMT

I have my YMCA OWI, NAUI OWII, PADI AOW, and NAUI Rescue Diver certifications.

I have read whosbest.txt in the ames.arc.nasa.gov archive.

Where I live there are shops/instructors that teach NASDS, SSI, PADI, NAUI, YMCA
advanced & dive master/coordinator courses. Could someone compare/contrast the 
advanced and/or dive master/coordinator courses from each of the agencies 
(including material covered and pre-requisites)? Please note that I realize that the
instructor makes all the difference in the world. If I receive email on this, I will
summarize and post. 

Thanks
---
TTYL & TANSTAAFL ---------------- Walter Moore 
      Internet: zwbm07@hou.amoco.com

..SCUBA divers do it with depth...blub...blub...blub...

Newsgroups: rec.scuba
From: davidw@cie.uoregon.edu (David Weingarten)
Subject: Re: Diving headaches
Organization: University of Oregon Campus Information Exchange
Date: Thu, 30 Jul 92 09:55:02 GMT

You're lucky it's only a headache!

Holding your breath, as you should have learned in your OWI class,
can lead to some much more severe conditions.  Two of them, Embolism
and Tension Pneumothorax, lead to a REAL headache: death!

So, the real solution is, stop holding your breath.  But in answer to
your question, hypoxia (not getting enough oxygen) can give you
some dizziness (or just make you pass out), and heavy concentrations of
CO2 (which builds up when you hold your breath) can cause nasty headaches.

					-- David

Newsgroups: rec.scuba
From: sdavis@laforge.ksc.nasa.gov (Steve Davis)
Subject: Re: Instructor/Agency Accountability
Organization: NASA
Date: Fri, 24 Jul 1992 21:20:26 GMT


  I have another question regarding instructor accountability/responsibility.   
As a newly-certified diver, I'm in the process of shopping for dive gear.  My  
instructor told everyone in our class to be sure and consult him before buying  
anything, which I did.  But it turns out that he stands to make a commission  
from anything I buy from the dive shop where I took the open water course.  He  
seems honest enough in giving opinions on gear that the shop doesn't carry;  
they sell primarily Sherwood gear, but he gave moderate praise to Dacor,  
ProSub, and U.S. Divers as well.

  It seems to me that the role of a salesman can be in direct conflict with  
that of an instructor, and that the two should never be mixed.  What are the  
positions of the certification agencies on this?  This shop is a "PADI 5-star  
Diving Center," which I'm beginning to read as, "Spend all of you money here."  

  Comments?

--
+----------------------------------------------------------------+
| Steve Davis                      | sdavis@laforge.ksc.nasa.gov |
| NASA, DL-DSD-32                  | (NeXT Mail preferred)       |
| Kennedy Space Center, FL  32899  |                             |
| (407)867-7582  fax:(407)867-2173 | #include <disclaimer.h>     |
+----------------------------------------------------------------+
From: paul@mr.med.ge.com (Chuck Paul 4-6544 MRCE)
Subject: Request info on Freeport Bahamas diving
Keywords: Freeport UNEXSO
Organization: GE Medical Systems, Magnetic Resonance
Date: Mon, 27 Jul 92 20:05:21 GMT


I haven't been to Freeport, Bahamas since 1989.  I was diving
at the UNEXSO operation in Lucaya.

Can someone who has been to Grand Bahama Island give me info
on recent UNEXSO experience or diving at other places on the
Island?  I have access to a friend's apartment in Lucaya, so
I may want to go back again for an inexpensive winter escape.

--Chuck Paul

Disclaimer - Above content is the author's personal opinion, and in no
	     way should it be construed to represent General Electric.
------------------------------------------------------------------------
Chuck Paul        HAIL PURDUE !         | We take pride in our image!
{crdgw1.ge.com}!mr.med.ge.com!paulc     | GE Medical Systems, MR Center
or use: uwm.edu!mrsvr!chuck             | P.O. Box 414,  Mail code W-826
Work: (414) 521-6544                    | Milwaukee, WI  53201
Newsgroups: rec.scuba
From: sgccdac@citec.oz.au (David Conran)
Subject: mensuration and sharks?
Organization: CITEC
Date: Wed, 29 Jul 1992 03:41:16 GMT
Keywords: mensuration,blood,sharks

I am post this query on behalf of my girlfriend ...

 She want's to know whether it is safe to go diving where sharks are
likely to be and well ... It is that time of the month (will be).
She is worried that this may affect the chances of sharks taking an
interest ...
So ... does anyone know anything about this ... is this a sufficent
amount of blood? Is a tampon going to help? Any other solutions ...
Any other female divers out there who have ever woried about this?

Bye .... David
-- 
+-v-------------------------------------------------------------------------v-+
|   |  _--_|\   David A. Conran                             61-7-227-7808 |   |
| o | /      *  Centre for Information Technology       Fax 61-7-222-2249 | o/
|   | \_.--._/  and Communications                    lucifer@citec.oz.au |_/
| o |       v   PO Box 279, Brisbane       "Reach out and grep someone"__/
+-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-/
Newsgroups: rec.scuba
From: sharonc@meaddata.com (Sharon Crichton)
Subject: Re: mensuration and sharks?
Keywords: mensuration,blood,sharks
Organization: Mead Data Central, Dayton OH
Date: Wed, 29 Jul 1992 14:55:03 GMT
Reply-To: sharonc@meaddata.com
Distribution: na

In article <1992Jul29.034116.15317@citec.oz.au>, sgccdac@citec.oz.au (David Conran) writes:
|> I am post this query on behalf of my girlfriend ...
|> 
|>  She want's to know whether it is safe to go diving where sharks are
|> likely to be and well ... It is that time of the month (will be).
|> She is worried that this may affect the chances of sharks taking an
|> interest ...
|> So ... does anyone know anything about this ... is this a sufficent
|> amount of blood? Is a tampon going to help? Any other solutions ...
|> Any other female divers out there who have ever woried about this?

There is a new-for-1992 book called _Women_and_Diving_ that addresses this
topic, as well as other topics that are of interest to female divers (such
as diving while pregnant, physical limitations and differences between male
and female divers, how to deal with sexist instructors, etc.) I'm sorry that
I can't remember the author's name right now (I'm at work, and the book's at
home). I would recommend the book, even if it's a little expensive for a
quick reading book (I paid $17 for it in Florida).

I can't offer any scientific evidence, but a personal experience. I had
my "period" during the trip when I was certified last May. One dive we did
was to a wreck that was listed in the book _Florida_Shipwrecks_ as being a
good place to see sharks. And yes, we did see a shark - the concensus of the
group was that it was a Florida Black Tip (we're not shark experts, so that
is probably wrong). It was under one part of the wreck that made sort of a
sheltered cove-like area. We got really close - about 10 or 20 feet away
from it. It pretty much ignored us until it decided to swim away.It was an
absolutely beautiful creature that I hope to see again sometime!

As far as my period goes, I was wearing a tampon and in the heavy part of my
cycle.  And the shark didn't seem to care one bit.

-- 
Sharon Crichton         *****************   Mead Data Central
sharonc@meaddata.com    **HAPPY! HAPPY!**   P.O. Box 933
uunet!meaddata!sharonc  **  JOY! JOY!  **   Dayton, OH 45401
                        *****************   FAX: (513) 865-1655
Newsgroups: rec.scuba
From: faustina@nevada.edu (ANDREA FAUSTINA)
Subject: all-inclusive packages
Organization: University of Nevada System Computing Services
Date: Thu, 23 Jul 1992 16:54:43 GMT

Myself and four others are planning a trip to Cancun and Cozumel the
first week of December 1992.  We are considering an all-inclusive trip.
We have never done one of these and wonder if:  it is a good deal, how
much food and drink you really get (do you have to eat at certain times
and places), are all activities included (how much diving), and any
other information anyone out there may have.

Thank you
Newsgroups: rec.scuba