HDTenEightyP/NetNews huggingface dataset:
From: sdodd@OES.ORST.EDU (Stephen M Dodd)
Newsgroups: rec.scuba
Subject: Re: Diving headaches
Date: 30 Jul 92 15:45:50 GMT
Organization: Oregon Extension Service, Oregon State University, Corvallis, Or.

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

   The odds are that you are retaining too much CO2 by not exhaling.  Of
   course when you exhale you must then inhale.  But the headache seems
   CO2 related.  Breathing slowly could have the same effect.  You never
   really lower the CO2 pressure in your blood by washing it out.

   Steve


-- 
- Stephen M. Dodd, System Analyst, Oregon Extension Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sdodd@oes.orst.edu          Internet          Oregon State University
503-737-0699                                  Corvallis, OR 97331
From: ops@vax.oxford.ac.uk
Newsgroups: rec.scuba
Subject: Diving in the Mediterranean
Date: 30 Jul 92 19:35:28 GMT
Organization: Oxford University VAXcluster

I'm interested in diving in the Mediterranean, especially Italy and Greece. Any
of you out there have any experiences in this area? I'm interested in the
wildlife side of things, and have a NAUI O/W 1 licence only.


Tristan
From: alice@media.mit.edu (Alice Lei)
Newsgroups: rec.scuba
Subject: Re: Quayle a diver?
Date: 22 Jul 92 19:35:20 GMT
Distribution: na
Organization: MIT Media Laboratory

In article <1992Jul21.124628.7348@meaddata.com> sharonc@meaddata.com writes:

>
>I have no idea what ice cream you could name after Dan Quayl(e)...
>:-)
>
 

Quayle eggs, of course
(ar ar ar - 
 throw her a fish, ladies and gents)

how appropriate for this group

god, am i becoming senile or what!!!
From: rogier@prl.philips.nl (Rogier Wester)
Newsgroups: rec.scuba
Subject: Re: gif picture of soft coral in alt.binar
Date: 22 Jul 92 09:21:22 GMT
Organization: Philips Research Laboratories, Eindhoven, The Netherlands

In article <1992Jul21.132210.318@spectrum.xerox.com> archer@rx.xerox.com writes:
>
>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

I'd rather not. I don't like to waist bandwidth for 2 or 3 persons. If you 
missed it send me a mail and I'll mail it directly to you. When there are 
lots'a people I'll reconsider.

How volatile is alt.binaries.pictures.misc at your site anyway? The picture 
is only a week old! I posted two others last Tuesday, don't miss them too :-).

statistics so far:
2 of you missed it
6 don't get alt.binaries.pictures.misc.....
2 reactions "I like it"

I don't know how to follow-up, how much interest is there?

Cheers,
  Rogier.
-- 
--------------------------------------------------
Rogier Wester
Philips Research Laboratories, The Netherlands.
e-mail: rogier@prl.philips.nl
Newsgroups: rec.scuba
From: ccechk@nuscc.nus.sg (Heng Kek)
Subject: Diving headaches
Organization: National University of Singapore
Date: Thu, 30 Jul 1992 02:14:02 GMT

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
Newsgroups: rec.scuba
From: mstacc@ultb.isc.rit.edu (M.S. Tremblay)
Subject: Re: Lake Ontario claims third diver
Originator: mstacc@ultb
Organization: Rochester Institute of Technology
Date: Tue, 28 Jul 1992 12:38:07 GMT

In article <1992Jul27.135647.4316@bb1t.monsanto.com> tjfeue@bb1t.monsanto.com writes:
>>I've done the Marsh myself, and I'm not posting from the great beyond :-)
>
>In keeping with the thread about diving as a religion, 
>maybe *HE* is the evil one!  Ready to lure us to our untimely death and
*>then take our souls (and BC's and tanks and regulators).  

Maybe this is where mail order houses get their stuff! :))

-- 
-Mark Tremblay              
  software specialist                       Internet:    mstacc@ultb.isc.rit.edu
     Rochester Institute of Technology      Phone:       716.475.2986
Newsgroups: rec.scuba
From: adb@herboid.uucp (Anthony DeBoer)
Subject: Re: More on pregnancy and diving
Organization: Linda's Dragon Memorial Society
Date: Tue, 21 Jul 1992 02:52:50 GMT

In <930532@hp-ptp.ptp.hp.com> davew@hp-ptp.ptp.hp.com (Dave Waller) writes:
>In rec.scuba, cadnews@nrtpa038 writes:
>
>> Keep in mind that whatever enters the Mother's blood also passes through
>> the unborn baby.  As the Mother descends, breathing compressed air, the
>> level of nitrogen in her blood increases, therefore, the unborn baby who
>> has much less tissue to absorb the nitrogen, gets an even higher
>> concentration of nitrogen.
>
>This is just not true.  Nitrogen enters the fetus' bloodstream from the
>mother's bloodstream through the same physical process by which it gets
>from the breathing gas into Mom's blood:  Diffusion.  By such a process
>it is impossible for the fetus to incur a greater level of dissolved N2
>than is present in the mother's blood.

I have to agree with Dave (and disagree with cadnews) at least as far as
ongassing is concerned, but I'd like to point out that there is still a
situation in which the fetus could have a higher bloodstream N2 content
than Mom: during outgassing.  Since fetal outgassing would be back out
through the placenta, into the mother who would also be trying to outgas
at that point, I would imagine that fetal tissues would work out to be
"longer" decompression compartments than the corresponding maternal tissue
groups.  On a suitably (in)appropriate profile (insofar as all profiles
are inappropriate while pregnant), this alone could cause problems for the
unborn child, although the PFO (mentioned in other postings) would likely
be a bigger problem.

But that's all on the theoretical side.  On the practical side, my wife
has hung up her C card for the season (and didn't wait for the little test
to turn blue first), and our new diver IS going to have to wait until
sometime in the next century for his/her first time on SCUBA (I don't
think you can log that first 9-month saturation dive since it's done at 1
atm).
-- 
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?
Newsgroups: rec.scuba
From: awpsys@ritvax.isc.rit.edu
Subject: Re: Re: truk lagoon trip - How many dives a day!!!
Reply-To: awpsys@ritvax.isc.rit.edu
Organization: Rochester Institute of Technology
Date: Wed, 22 Jul 1992 12:52:58 GMT

>In article <l6lutkINNqb6@exodus.Eng.Sun.COM> petolino@joe.Eng.Sun.COM (Joe Petolino) writes:
>Is this really true?  I know that you'll get more bottom time if you do your
>dives in deep->shallow order, but I've never heard anyone claim that the

Everything I have heard is that reverse profile plans *do* work *if* divers 
follow their computer or tables acurately.

The major problem with reverse profile diving is the greatly reduced bottom
times that the computer or tables will allow you.   This makes it much easier
to approach or even exceed the NDLs.   It also makes it much more likely that
divers will be pushing the limits of their computers or tables.  As everyone
knows,  DCS can occur when divers push the limits even if they were
within their NDLs.

- Andy

Andrew W. Potter                             Internet: awpsys@ritvax.isc.rit.edu
Associate Director                                Bitnet:   awpsys@ritvax.BITNET
Data Center Operations & Technical Support     Information Systems and Computing
Rochester Institute of Technology, P.O 9887, Rochester NY, 14623  (716) 475-6994
Newsgroups: rec.scuba
From: njs@scifi.uucp (Nicholas J. Simicich)
Subject: Re: Are ther YMCA dive agencies in Australia ?
Organization: Nick Simicich, Peekskill, NY
Date: Fri, 24 Jul 1992 03:45:11 GMT

In article <1992Jul21.031852.14813@herboid.uucp> adb@herboid.uucp (Anthony DeBoer) writes:
>Nicholas J. Simicich <njs@scifi.uucp> writes:
>> [ taken somewhat out of context ]
>>Yeah, you YMCA guys teach wacky stuff like those forward rolls and
>>stuff. :-) 
>
>Could be worse.  I've watched some divers do what they call the "UDT
>Entry", which involves taking a fairly aggressive leap at the water into a
>horizontal position, with a half twist so you hit the water tank downward.
>The twist is continued into a complete roll so you wind up face downwards,
>either kicking forward or going directly into a pike dive downward.  It's
>all a very macho thing, and I should probably add the two disclaimers that
>firstly the gentlemen involved don't do this when there are impressionable
>students around, and that secondly I have no idea whether or not any
>self-respecting member of the UDT practises any entries even remotely
>resembling this one.

I do a parody of this entry sometimes if I'm holding a camera.  I
stand on the dive platform and then fall into the water turning over
in mid-air, so that I land on my tank.  I'll typically do this if I
have a camera in my hand, and don't want it to impact in the water.  

You have to be careful not to hit the side of your head on the water
if you do this.  You could rupture an eardrum that way.  A hood will
tend to protect your eardrum from impact.

I've seen films of seals doing an entry sort of like this from a
moving inflatable boat.  They would roll off of the boat and hit the
water, tank first.  The only UDT/SEAL type I ever knew I dove with who
did any sort of wierd entry just sort of ignored the fact that he was
wearing scuba gear and dove in head first.  Then he ruptured his
eardrum on the way down to free an anchor.


-- 
Nick Simicich - uunet!bywater!scifi!njs - njs@watson.ibm.com
SSI #AOWI 3958, HSA 318, NAUI #14065
Join the movement ---  turn 'to bush' into a verb.
Newsgroups: rec.scuba
Subject: USD Regulator Warning
From: Kelly Cunningham  (Random Deviate))
Date: 22 Jul 92 10:05:29 CST
Reply-To: deviate@lipschitz.sfasu.edu

Hello all,

I received another warning from USD re: Regulators.  It seems that the plastic  
second-stage develops cracks at the hose connection.  A cursory check of my  
C-21 showed cracks on octopus only.  

I'm beginning to wonder about USD regulators.  My USD regulator has been the  
ONLY weak link in my equipment (so far).  I think I'll start looking at some  
Dacor stuff.

--
Randomly,         ____
Kelly Cunningham (_/\_)
<deviate@lipschitz.sfasu.edu> NeXTMail (encouraged)
<f_cnnghamjk@ccsvax.sfasu.edu> VMS Mail (tolerated)
"Those who are ignorant of history are doomed to listen to only new music."
                                                             -- Scott Simon
Newsgroups: rec.scuba
From: njs@scifi.uucp (Nicholas J. Simicich)
Subject: Re: Rehersal of weight belt ditching
Organization: Nick Simicich, Peekskill, NY
Date: Fri, 31 Jul 1992 14:34:56 GMT

In article <1992Jul29.172441.15582@eco.twg.com> reece@eco.twg.com (Reece R. Pollack) writes:
>
>In article <1992Jul28.224123.13857@herboid.uucp>, adb@herboid.uucp (Anthony DeBoer) writes:
>|>Bob <bob@hubcap.clemson.edu> writes:
>|>>>Bruce writes:
>|>>
>|>>>        If you can hold your breath for 30 seconds under water, there is a
>|>>>relatively safe way to practice weight belt ditching.  Start at the surface,
>|>>>take the regulator out of your mouth, and take a breath and hold it.  Dive to
>|>>>the bottom at say 10 to 15 feet, and release your belt there.  You will get a
>|>>>rapid ascent without possibility of embolism, as your lungs were filled at the
>|>>>surface.
>|>>
>|>>You need to add that this is true provided you have not been diving and
>|>>your blood is not already sturated.
>|>
>|>Umm, you also need to add that embolism and DCS are two different things. 
>|>Assuming you're not already getting bent, you're not going to ingas or
>|>outgas enough nitrogen in 30 seconds at 15 feet to cause yourself a
>|>problem doing this.
>
>True, but the sudden decrease in pressure may cause bubble formation
>when it might not otherwise occur.

Um, SSI has done emergency ascent training (Ditch weight belt, BFA,
flare) for a number of years.  I don't think that they have had any
accidents.  I typically do this at the bottom of a pool for confined
water (1 rep) and from about 20-22 feet in open water (1 rep).
Deepest I've ever seen it done as a training exercise is 30 feet, when
I went through my instructor training.  I should mention that the
instructor goes up and down with the student, so I typically do 4-6
ascentsw like this per training weekend.

PADI has a similar bit of training, the ESA (Emergency Swimming
Ascent), done in their OW class, and the instructor goes up and down
with the students.  PADI claims to never have had an instructor bent
from this procedure.

I suspect thaat on typical OW training dives, nitrogen PP is so low
that the ascents don't matter that much.

-- 
Nick Simicich - uunet!bywater!scifi!njs - njs@watson.ibm.com
SSI #AOWI 3958, HSA 318, NAUI #14065
Join the movement ---  turn 'to bush' into a verb.
Newsgroups: rec.scuba
From: lls@kings.demon.co.uk (Lady Lodge Systems)
Subject: Re: Dive Magazines
Keywords: diving, publications, magazines
Organization: Lady Lodge Systems
Date: Thu, 30 Jul 1992 09:44:13 GMT

In article <p_pms9c.jnickel@netcom.com> jnickel@netcom.com (John Nickel) writes:
>
>The following is a compliation of magazine information that I have
>collected and put together for my advanced classes.  I thought that some
>of you might also enjoy it.  Especially after flaming SDM ;-).  Feel
>free to correct it and add to it.  If you do please mail me a new copy
>for my records.  Enjoy!!

You forgot the major UK rag (whoops, sorry SAA members!).......

	Diver
	Eaton Publications/BSAC
	55 High Street, Teddington, Middlesex, TW11 8HA
	+44 81 943 4288
	12, $48 (US/Canada), 1.95 UK Pounds, Free to BSAC Members.

-- 
Regards,
        Russell
 ---------------------------------------------------------------------------
| Russell Brown          | MAIL : russell@kings.demon.co.uk                 |
| Lady Lodge Systems     | PHONE: 0832 272224 (Home/Work it's all the same) |
 ---------------------------------------------------------------------------
Newsgroups: rec.scuba
From: dave@hpdstma.ptp.hp.com (Dave Waller)
Subject: Re: VISION trip in Sept
Organization: Hewlett Packard
Date: Thu, 30 Jul 1992 17:37:48 GMT

Another OOPS! The email address in my original message was incorrect. Be
sure to send any responses to

dave@hpdstma.ptp.hp.com (note the 'ptp' where it incorrectly had 'hpl' as a 
subdomain)

not the incorrect

dave@hpdstma.hpl.hp.com
-- 
Dave Waller
YMCA Instructor
Newsgroups: rec.scuba
From: dyer@marina.asd.sgi.com (Dyer Crouch)
Subject: Re: mensuration and sharks?
Keywords: mensuration,blood,sharks
Organization: Silicon Graphics, Inc.
Date: Wed, 29 Jul 1992 21:25:08 GMT


In <nxnmvda.jefff@netcom.com> jefff@netcom.com (Jeff Irwin) writes:

>Actually, this is one of the few women's related issues that has really been 
>studied.  

A reply:

>If one were being cynical, one might suppose that this is because the issue
>directly effects the safety of male divers as well. :-)

Did you send this to soc.feminism and it got sent to rec.scuba by mistake?
From: jcv26@cas.org (Jon Vander Hill)
Subject: PADI's Position on Enriched Air Nitrox Diving
Organization: Chemical Abstracts Service, Columbus, Ohio, USA
Date: Tue, 28 Jul 1992 12:32:23 GMT

PADI Headquarters sent me this note in response to a call from
me regarding rumors that PADI is/will be offering a NITROX
specialty.  It further clarifies what I summarized in a previous
post.  Keep in mind that I'm not a spokesperson for PADI, just a 
concerned member and in this case a messenger.

Jon Vander Hill
jon@cas.org


PADI's POSITION ON ENRICHED AIR NITROX DIVING

PADI does not sanction gas mixtures other than air for
recreational diving at this time, nor does PADI accept liability
for Enriched Air Nitrox certification courses.  PADI does not
feel that the proper infra-structure of industry controls is in
place to safely support a broad application for Nitrox use for
recreational diving.

Some of these safety concerns include:  proper supervision, gas
mixture, training, dive planning, equipment considerations and
equipment capability, control of partial pressures of oxygen,
depth and dive table selection, etc.

We wish to make it clear that PADI is not "against Nitrox
diving,"  but simply that PADI's charter, to date, has focused on
the training of air diving techniques.  Our training materials
and standards were constructed base on air diving and to date
we have had little to no provisions for mixed gas or Enriched Air
Nitrox diving.  As a result, PADI certification and course
sanctions apply to air diving only.

If you have any questions regarding this, or any other
training-related issue, please contact the Educational
Consultants at PADI Headquarters at 1-800-729-7234.
From: peterson@hpl.hp.com (Chris Peterson)
Newsgroups: rec.scuba
Subject: Re: questions about incidents
Date: 28 Jul 92 00:35:27 GMT
Distribution: na
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <1992Jul24.191556.1@scivax.stsci.edu> clampin@scivax.stsci.edu writes:
>
>  There have been a lot of questions recently regarding incidents
>and lessons to be learned. The British Sub-Aqua Club in the UK maintains
>an incident file to which divers are encouraged to contribute reports of
>diving incidents. These span fatalities to fairly trivial incidents, the
>idea being that there is a lesson to be learned by one and all. 
>Anonymity is maintained as a way of encouraging people to be honest,
>the program being used for statistical purposes only. 
>
> Each year a report  summarizing the previous years incidents is distributed
>to Branch Diving Officers who can then discuss it with their instructors. It
>has proved useful for identifying patterns of dangerous diving and areas in
>which the training program could be enhanced.
>
>Perhaps its time to try to put together such a program here. It would require
>some cooperation by the various agencies to make it work though.....

The Divers Alert Network (DAN) publishes an annual report of diving fatalities
reported to them.  A summary is typically published in their newsletter,
_ALERT DIVER_.  In addition to doing research, DAN also provides 24-hour diving
emergency medical advice and a really great diving accident insurance policy.

Call the business office for information on reprints (919/684-2948).  Call the
membership office (800/446-2671) for information on membership and insurance.
DAN is located at the Duke University Medical Center in North Carolina.        
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA 
(415) 857-6432                                     peterson@peterson.hpl.hp.com
From: abreu@dcs.qmw.ac.uk (Abreu)
Newsgroups: rec.scuba
Subject: Re: Diving in Portugal ?
Date: 25 Jul 92 19:49:26 GMT
Organization: Computer Science Dept, QMW, University of London

In <1992Jul19.091252.5602@klaava.Helsinki.FI> mluoto@klaava.Helsinki.FI 
(Markku Luoto) writes:

 > 	As it seems now, I'll be spending some time in Portugal this
 > 	AUGUST and therefore I'd like to know what are the chances of
 > 	getting wet & were & how too...

Try asking in soc.culture.portuguese
Hamilton
Newsgroups: rec.scuba
From: leej@sgi.com (Lee Jones)
Subject: Re: Skin Diver Magazine
Organization: Silicon Graphics, Inc.
Date: Mon, 27 Jul 1992 22:44:46 GMT

In article <1992Jul27.215258.26201@hubcap.clemson.edu> mjs@hubcap.clemson.edu (M. J. Saltzman) writes:

> Is the diving community prepared to fund a corresponding entity for ourselves?

The diving community funds at least *two* such periodicals.  As Nick
mentioned, both Undercurrent and In-Depth accept no advertising, and both
write no-nonsense, objective reviews of dive destinations, equipment, 
industry happenings, etc.  Furthermore, Consumer's Report doesn't have anywhere
*near* the sense of humor they'd need to do something as fun as the 
"Precious Island" review that Undercurrent did a couple of April's back.

If the phone numbers for Undercurrent and In-Depth aren't in the FAQ, they
*should* be.

Regards, Lee

Newsgroups: rec.scuba
From: m16532@mwunix (Steven Bayer)
Subject: Re: Ikelite Aquashot
Organization: Mitre Corporation, Houston, TX
Date: Thu, 23 Jul 1992 18:54:08 GMT

In article <1992Jul23.175254.9747@odin.corp.sgi.com> rene@cvette.asd.sgi.com writes:
>I seem to have a film winding problem with my Aquashot at a depth of more
>than 40 feet. This seems to happen only with the Kodak disposable. The Fuji
>seems to be more immune to this problem but I'd rather use Kodak film. Does
>anyone know if this is a characteristic of the Aquashot or do I just have a
>bum housing??
>
>Thanx

Ikelite made some changes to the Aquashot to solve this problem; sounds 
like you have the old model.  When I bought one, I asked the dealer if
the model he was selling was the newest and he assured me it was.  After
I got it I called Ikelite to make sure and they assured me I had an older
model.  But!!! the woman who answered the phone (just the phone operator,
not a technician!) told me to simply mail the camera to Ikelite and they
would retrofit it at no charge.  I did, and they did.  I even told them
I needed it in a hurry for a trip to Roatan and they got it back to me
in time.  Ikelite is one of the best companies I have ever dealt with. A
friend had a disk camera housing that leaked and Ikelite replaced both
the housing and the camera.  Great people.

Good Luck

                      __o                                          
                     ~\<,                                          
____________________()/ ()______________________________________________________
Steve Bayer                                           bayer@galileo.jsc.nasa.gov
The MITRE Corporation                                             (713) 333-0978
1120 NASA Road One, Suite 600                                 Houston, TX  77058
From: cbm@chem.ucsd.edu (Chris B. Mills)
Newsgroups: rec.scuba
Subject: cancun/cozumel dive spots
Date: 30 Jul 1992 20:00:38 GMT
Organization: University of California San Diego, Chemistry
Distribution: ca
NNTP-Posting-Host: chedccf0.ucsd.edu

	I am going to Cancun at the end of August and I am interested in
	finding the best places to dive in that area, and the best boat 
	tours recommended.  I plan on making at least one trip to cozumel,
	if anyone has any suggestions on tours and or dive spots , any info
	would be greatly appreciated. 

	You can E-mail me at cbm@chem.UCSD.edu


Newsgroups: rec.scuba