HDTenEightyP/NetNews huggingface dataset:
From: dunbar@boulder.colorado.edu (S Dunbar)
Subject: Followup to my story of the other day re: inner ear bleed.
Reply-To: dunbar@boulder.colorado.edu (S Dunbar)
Organization: University of Colorado, Boulder
Distribution: na
Date: Fri, 4 Sep 1992 21:08:54 GMT

I saw an ear nose and throat MD this moring, he is also a diver.
I explained how on one of my dives  I flet dizzy and disoriented and
vertigo. while in the water this all occured.  He gave me an ear exam, the
dive was about 9 days ago, and said everything was healty.  He told me
that he thinks what happened is an inner ear problem in the semi circular
canals.  This is how he discribed it, the inner ear canals have two fluid
vessels, one blue and one red and he thinks that the red or blue, one of them
tore and leaked out and cause and electrochemical potential difference and
sent a message to my brain that i was unbalanced or that something was wrong,
you doctors out there excuse if i have some minor discepancies in the 
physiology, but i was trying to listen to the doctor and i wasnt taking note,
s

but anyways the tear in one of the vessels is what gave me vertigo, he told
me to wait about 6 weeks, vertigo free, before i dive again.  He also said
that if when you equalize, you do it forcefully, then that could of been what
did the damage, i then told him that i do have a difficult time equalizing,ie
i can`t just hold my nose and blow, that won't do it for me, i need to hold
my nose and blow and swallow at the same time, i also take one sudafed an
hour before the dive, he said that would be ok for me to do in the future
he also said using afrin in each nostil would help too.

I would not do this unless i talked to a ent doctor , so don`t use my story
as true for everyone, drugs have side effects and react diff. on everyone.

So he basically said it will be a trial situation on my next dive, i could
dive for the rest of my life and never have another problem or the weakened
tissue could leak again and i may be done.  He said that by assuring smooth
equalizing in the future would help my situation....

I always have a small case of allergies so i am always slightly congested
so in the future if i don't feel clear before the dive, i wont do it.

ps, i am writing a report of my dive now and all the other dives that
i did on my honeymoon so that will be on the net soon for those that
are interested 

thanks to those that sent me messages to my previous post

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: pyron@skndiv.dseg.ti.com (Dillon Pyron)
Subject: Re: Oil in the tank!
Keywords: oil
Reply-To: pyron@skndiv.dseg.ti.com
Organization: TI/DSEG VAX Support
Date: Tue, 1 Sep 92 15:29:57 GMT


In article <dan.56.715315681@basil.eng.monash.edu.au>, dan@basil.eng.monash.edu.au (Dan Grimm) writes:
>>From: wueller@nagoya.sni.de (Ulrich Wueller)
>>Subject: Oil in the tank!
>>Due to a broken compressor I have got some oil in my tanks. Who has an
>>advice for getting it out? Do chemicals have an impact on the quaility
>>of the air?
>Ulrich,
>Yep, you will have very unhealthy air until you clean out your tank.
>Technique used by me when our (Monash Uni.) clubs compressor dumped oil
>in the tanks:
>   1. let out all air
>   2. remove valve
>   3. Make up a bucket of hot soapy water (some detergent)
  Not too hot, though
>   4. Pour some in, swirl it around, pour it out.
>   5. repeat 4 until the inside looks clean
>   6. Pour lots of fresh water in until the tank has no residual from the
>     soap or detergent.
  Start with warm water, getting cooler
>   7. Allow to dry.   
>   8. Put valve back when inside is very dry. (Grease O-ring with suitable
>    stuff if available)
  I have put 200-300 pounds in the tank, then drained it and removed the valve. 
The dry air tends to pull more moisture out.
>Hope the above helps.
>Dan

One additional step.  When you are done, take all affected tanks to someone
that can do air quality checks.  Also, take a known clean tank filled from your 
now fixed compressor.  Just to make sure it is fixed.

>Dan Grimm
>Dept. Elec & Comp. Sys. Engineering, Monash Uni. Australia.
>ph.(+61 3) 565 3479, Fax 565 3454,     dan@basil.eng.monash.edu.au
>
>
--
Dillon Pyron                      | The opinions expressed are those of the
TI/DSEG Lewisville VAX Support    | sender unless otherwise stated.
(214)462-3556 (when I'm here)     |
(214)492-4656 (when I'm home)     |"Do something different, DISAPPEAR"
pyron@skndiv.dseg.ti.com          |  "DISAPPEAR"
                                     _A Day On Earth_
                                     Brave Combo
Out of news, share news  (working too many classes, sorry  :-)
Slashing motion across forehead, index and middle fingers pointing at donor
then touching forehead
From: peterson@hpl.hp.com (Chris Peterson)
Newsgroups: rec.scuba
Subject: Re: DECO'92 Hahn's Tables
Date: 28 Aug 92 19:42:37 GMT
Organization: Hewlett-Packard Laboratories, Palo Alto, California

Please post an address to which I can send you a check for the tables,
or give me a call 415/857-6432 (work).  Do you have any documentation
on the theory, development, testing, and use of these tables?

..............................................................................

In article <920827231623_73467.2574_DHE68-1@CompuServe.COM> 73467.2574@CompuServe.COM (Andy Schmidt) writes:
>Finally got a couple of sets of the new 1992 German tables developed by Prof.
>Dr. Hahn (Scubapro DC11 computer). There are sealevel and altitude tables. In
>general, the tables are VERY conservative on the first dive and you are
>consistently doing decompression stops for typical dive profiles.
>
>Since you are often doing mandantory stops (where the US tables give you
>straight ascends) the table is VERY liberal on the surface intervals. After
>only a few hours you have very little RNT - but remember, you're total no stop
>time is ALWAYS very short to begin with.
>
> Feet/Meter  Time  NAVY   NAUI   PADI  Buehlm  DECO92  DECO 92 comment
>
>  60   18    NDL    60     55     55     65      44    60 for 55 = 6 min stop
>  60   18     80   7@10   7@10   n/a    6@10    16@10
>  80   24    NDL    40     35     30     27      23    80 for 30 = 4 min @ 10'
> 100   30    NDL    25     22     20     17      14    100 for 20 = 5 min @
>10'
>
>Repetitive dives: 100 for 14, 2h SIT, 80 for 20, 3h SIT, 60 for 40
>
>  NAVY: 2 min @ 10' on last dive
>  NAUI: 7 min @ 10' on last dive
>  PADI: no decompression necessary, within the NDL limits.
>  Buehmann: 3 min @ 10' on SECOND dive, within NDL on last dive. Fly: 8 hours
>  DECO92: 4 min @ 10' on second dive, 6 min @ 10' on last dive. Fly: 36 hours
>
>Harve, your's are on the way - anyone else wanting a set of laminated tables, I
>have a few extra. Reimburse me $14.00 per set.
>
>Andy
>
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA 
                                                            peterson@hpl.hp.com
From: peterson@hpl.hp.com (Chris Peterson)
Newsgroups: rec.scuba
Subject: Re: Boyancy control with drysuits
Date: 25 Aug 92 23:33:13 GMT
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <p185eco@fido.asd.sgi.com> leej@sgi.com (Lee Jones) writes:
>
>I don't doubt that I have some pretty spectacular velocities in the last 
>FOUR FEET of an ascent.  I'll admit it - at the end of a dive, I'm pretty
>buoyant at 4' with an empty BC.  However, is this really a big concern?
>
>* It seems that the danger of a barotrauma is essentially nil from 4'.
>  Also, there seems to be some empirical evidence that most of us 
>  almost unconciously exhale continuously during that last second or two.
>...
>Regards, Lee Jones

The last 4 feet is -- theoretically -- the most dangerous part of an ascent
since the greatest volume changes take place there.

If my memory serves me properly, it only takes about 2psi overpressure to start
tearing the alveoli of the human lung.  If you do the numbers, there is more
than a 2psi increase from about 5fsw to the surface (closed, flexible vessel
like one's lungs while breath-holding).
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA 
                                                            peterson@hpl.hp.com
Newsgroups: rec.scuba
From: schludermann@sscvx1.ssc.gov
Subject: WANTED old style J or K valves 3/4" base
Organization: Superconducting Super Collider Laboratory
Date: Wed, 26 Aug 1992 00:07:44 GMT

 I need a couple of k or j valves in servicable condition that were used on
old style steel tanks (3/4" pipe thread)


                                       kris
From: wall@hel4.brl.mil (Jeff Wall)
Newsgroups: rec.scuba
Subject: Re: Cayman & Andrew ?
Date: 3 Sep 92 15:09:53 GMT
Organization: U.S. Army Human Engineering Lab  Aberdeen, MD

In article <Sep02.205237.23088@yuma.ACNS.ColoState.EDU>
provost@mozart.NoSubdomain.NoDomain (peter provost) writes:
>Does anyone have any good info about Hurricane Andrew's effects on Grand
Cayman?
>I was hoping to dive there this Christmas?
>
>--P.G.Provost - provost@cs.csu.edu
>
Andrew didn't come close to the Cayman islands

Jeff Wall
wall@hel4.brl.mil
Newsgroups: rec.scuba
From: wall@hel4.brl.mil (Jeff Wall)
Newsgroups: rec.scuba
Subject: Re: depth in the US of A
Date: 4 Sep 92 15:08:09 GMT
 <1992Sep3.101601.3886@desire.wright.edu> <pd72mq8@fido.asd.sgi.com>
Organization: U.S. Army Human Engineering Lab  Aberdeen, MD

In article <pd72mq8@fido.asd.sgi.com> leej@sgi.com (Lee Jones) writes:
>In article <1992Sep3.101601.3886@desire.wright.edu> wall@hel4.brl.mil (Jeff
Wall) writes:
>>In article <pbp8i4s@fido.asd.sgi.com> leej@sgi.com (Lee Jones) writes:
>>>
>>>Bottom line, my student has to remember that it's 14.7 psi/ATM
>>
>>I think that is an excellent question.  A diver shouldn't be working on a
Dive
>>Master cert to understand this type of concept so crucial to all aspects of
>>diving from using a lift bag to air embolisms.
>>
>
>Well, what I'm really wondering is it necessary for a student to know or care
that 
>14.7 psi = 1 ATM.  I think it's *really* important to know that at 66 ft. the
pressure
>is three times that at the surface.  That clearly has tons of effects.  But is
it
>important for them to know it in psi?  Except to perhaps relate that to the
pressure
>in their tank...  
>
>It's not a *big* deal, but I am doing a rewrite of my exam and am trying to
look at 
>all the questions with a somewhat critical eye.  

Hmmmm,  I see what you're after.  I'm not an instructor (yet) although I used
to teach some remedial math courses in college.  I can remember as a student in
college hating it when I had to memorize something.  As Dave Waller pointed out
in a similar post simplifying the question will test the same knowledge and
understanding of the student without over complicating things and causing the
student to miss the question.  

If we go back to your original question:
   "If you're 66 ft. deep in Monterey Bay, what is the ambient pressure?"

3 ATA

Now, you as the instructor need to ask yourself if this is an acceptable
question and answer.  After mulling over Lee and Dave's post's I'm inclined to
say yes this question accomplishes what it is suppose to.

You can also use this same idea with lift bag questions, i.e. If you have a
lift bag with X cubic ft of air how much will it have of the surface.  no need
to reference psi here either.

Jeff Wall
wall@hel4.brl.mil
From: FKK@SLACVM.SLAC.STANFORD.EDU
Newsgroups: rec.scuba
Subject: WATERPROOF BOXES
Date: 28 Aug 92 18:27:47 GMT
Organization: Stanford Linear Accelerator Center

I just looked in a '91 Ikelite catalog.  THey carried a waterproof
(to 300 ft) box that is 2-5/15x4x7-7/8 but its $90.  I did not see it
in the '92 catalog.  It is an option for those who want to spend the
money if they still carry it.  I have good luck with my Ikelite camera
housing remaining water tight.  These boxes should work well.  Frank
From: FKK@SLACVM.SLAC.STANFORD.EDU
Newsgroups: rec.scuba
Subject: PEEING IN A WETSUIT
Date: 28 Aug 92 05:58:04 GMT
Organization: Stanford Linear Accelerator Center

Many of us have known that brief surge of warmth from peeing in
our wetsuits.

Since I now dive dry I monitor my fluid intake carefully before
diving to avoid this problem but...

A friend recently told me that due to a change that takes place
in your skin after contact with urine, you lose heat more rapidly
after peeing in your suit.  Does anyone confirm this?
Newsgroups: rec.scuba
From: dave@hpdstma.ptp.hp.com (Dave Waller)
Subject: Re: Information about advanced deep diving course wanted
Organization: Hewlett Packard
Distribution: usa
Date: Wed, 2 Sep 1992 22:09:27 GMT

In article <1992Sep2.212644.8122@odin.corp.sgi.com>, mango@nova.esd.sgi.com (Eric Manghise) writes:
|> 	No, this is not true. There is another agency called SSI that offers
|> 	deep diving classes. Its format is little more free form, and they
|> 	can custom tailor there classes to suit more needs. If you need more
|> 	information about the Wilkes-Barre I can put you in touch with someone
|> 	who has dove it, and also teaches custom tailored deep diving classes
|> 	with trimix into the 250 ft range. Send me email if you are interested.

Thanks for the update!

-- 
Dave Waller
YMCA Instructor
From: guido@sun-3.cs.uct.ac.za (Guido Zsilavecz)
Subject: re-cerftification of instructors
Summary: Do instructors need re-certification?
Keywords: re-certification, instructors
Organization: Computer Science Department, University of Cape Town
Date: Mon, 31 Aug 1992 06:08:06 GMT

just a question:
do NAUI, PADI etc. instructors need re-certification at all? I belong to
the mainly club-based SAUU (South African Underwater Union, affiliated to
CMAS) and our instructors need to run at least one course a year to stay
in-date, ie. certified. This requirement is understandable as SAUU is
amateur, and instructors teach for the love of diving, and hardly get enough
money out of a course to cover expenses, and thus don't teach often. 
Considering the cost of becoming a PADI or NAUI instructor I guess that
unless you want to make it your job, don't bother. But still, what if
you stop instructing for a few years. After those years, are you still
a legal instructor? ie. certification for life?

Just wondering...

Guido
--
                           __________.            
Guido Zsilavecz        _  /       /   \       Department of Computer Science 
Laboratory for        / \/             \/\___        University of Cape Town 
Advanced Computing   /   \   ..,|||.,  /     \      guido@uctcs.cs.uct.ac.za  
Newsgroups: rec.scuba
From: acb6257@zeus.tamu.edu 
Subject: more BC questions...
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Fri, 28 Aug 1992 20:23:00 GMT

I'm considering buying a BC with weight pockets. A local dive shop has both
Zeagle and a Sea Quest model. They're charging the same price, but the shop
owner is pushing the Sea Quest model. I don't have enough diving experience 
to know how important the various differences are.

(1) the Zeagle has a bladder, the Sea Quest is bladderless
(2) the Zeagle has the air mostly in the back. is the tendency to tip face
    forward in the water because of this a problem? i've heard 2 different
    opinions from 2 dive shops. is it more of an issue in rough water?
(3) the Zeagle has a second dump valve low on the BC, the Sea Quest doesn't
    and doesn't have a port to add one.
(4) the Zeagle has a soft pad for the tank and 2 straps, the Sea Quest has
    a hard plastic tank pad with 1 strap. 
(5) the Zeagle has the various adjustments for fine-tuning the size of the
    BC.
(6) the Sea Quest has pockets and the Zeagle doesn't.

I'd appreciate opinions on any or all differences (or any I left out).
Thanks,
Angie Betker
From: dhoward@novell.com (Dirk W. Howard)
Newsgroups: rec.scuba
Subject: Re: Article in Current _SCUBA Times_
Date: 27 Aug 92 15:14:56 GMT
Organization: Novell, Inc.

In article <1992Aug27.065131.16394@news.Hawaii.Edu> teshima@uhunix.uhcc.Hawaii.Edu (A. Lani Teshima) writes:
>[stuff deleted]
>attorneys, please!]). Now the boyfriend has all these horrible habits
>and thinks he's Mister Supergills, even though he has no inkling of
>dive physiology, etc. I mean, what can you do?

Refuse to dive with him.

---------------------------------------------------------------------------
Dirk W. Howard              These are my personal opinions.  No one else 
Novell Technical Support    in their right would claim them.
dhoward@novell.com
                     "I'm sorry Ralph... not even the Networking
                      Fairy can pull this one out of the fire."
---------------------------------------------------------------------------
From: dave@hpdstma.ptp.hp.com (Dave Waller)
Newsgroups: rec.scuba
Subject: Re: Dive Computers
Date: 25 Aug 92 23:21:02 GMT
Organization: Hewlett Packard

In article <1992Aug25.210351.15758@mksol.dseg.ti.com>, pyron@skndiv.dseg.ti.com (Dillon Pyron) writes:

|> Remeber the Edge, milled titanium was one
|> solution.

I believe it is aluminum, not titanium.

-- 
Dave Waller
YMCA Instructor
From: mike@SSD.HARRIS.COM (Mike Thomas)
Newsgroups: rec.scuba
Subject: Re: Hurricane ANdreW
Date: 1 Sep 92 17:00:35 GMT
Organization: Harris Computers Systems Division, Fort Lauderdale,FL

In article <1992Aug31.163857.20600@u.washington.edu> wolgamot@milton.u.washington.edu (Greg Wolgamot) writes:
>I've heard that hurricanes can have devastating effects on coral reefs.
>Does anybody out there know of Andrew's effect on Florida's reefs?


I have been diving frequently in the keys over the last few months.
What I have seen is that there is quite a lot of silt sediment 
deposited on the bottom, which is not conducive for thriving coral.
According to the locals, a good hurricane was needed to help
"clean it up". I don't think the coral structures themselves are
much affected by surface turbulence.  Going back this weekend, will 
post more on the diving (and driving).

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                      %
%	Mike Thomas                     Lead Diagnostic Engineer       %
%       Harris Computer Systems         Fort Lauderdale, FL.           %
%       mike@flipper.CSD.HARRIS.COM                                    %
%                                                                      %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Newsgroups: rec.scuba
From: smckenzi01@cc.curtin.edu.au
Subject: Re: Uncontrolled ascent w/o weightbelt
Organization: Curtin University of Technology
Date: Tue, 1 Sep 1992 03:22:55 GMT

> I'm also curious to hear people's experiences with this.  I once lost 
> my weight belt at 100 feet.  I was right at the bottom, so I got the 
> belt back on quickly, but my mind was filled with images of ballooning 
> up toward the surface if I had not immediately recovered the belt.  
> Later when I thought about the incident, I realized that I wouldn't 
> have just immediately soared upward, but could have maintained control 
> fairly easily at depth.  However, if I had ascended sans-weightbelt, 
> I would have had increasing problems controlling my ascent as I got 
> closer to the surface.  
> 
> How much control do you really have if you lose your weight belt at depth?  
> 
>   Ken Ewing 
>   Sequent Computer Systems, Inc. 
>   Beaverton, Oregon 
>   kene@sequent.com 
>   ...!uunet!sequent!kene 
>

Well actually the deeper you are, the more likely you are to recover.
Let's think about this. At 100' a 5mm-7mm full length wetsuit will be
less bouyant than at 30'. In fact the reason you inflate your B.C. at
this depth is to compensate for this loss. If your weight belt is lost
at this depth, dumping all your B.C. air will reduce your net bouyancy
and aid in maintaining that depth for weight belt recovery. 

	I have never lost my weight belt at this depth, however I have
lost weight belts in 20'- 30' depths many times while taking crayfish
(crayfish = rock lobster). Unless you feel it slipping and grab it with
one hand, you will hit the surface. If you are covered in neoprene, 
getting it back yourself is impossibly hard. Your buddy should have
surfaced to check on you and they can get it for you.

      o,--------------,         .. .. .. .. .. .. .. .. .. .. ..
      ||      |     /          :   Matthew Hepburn Mckenzie     :
      ||      |   /            :   38/216 Cambridge Street      :
      ||      |   \            :   WEMBLEY  WA  6014            :
      ||      |     \          :   AUSTRALIA                    :
      |/--------------'        :           Ph. +61 9 382 4819   :
      |                         .. .. .. .. .. .. .. .. .. .. ..
      |
      |
   /~~~~~~\           PSImail: psi%050529452300070::SMCKENZI01
/\/\/\/\/\/\/\/\/\/\/ Internet: SMCKENZI01@cc.curtin.edu.au
                      Bitnet: SMCKENZI01%cc.curtin.edu.au@cunyvm.bitnet
                      UUCP  : uunet!munnari.oz!cc.curtin.edu.au!SMCKENZI01
 
From: ngsw@hpsgm2.sgp.hp.com (Soon Wei NG)
Date: Tue, 1 Sep 1992 07:55:05 GMT
Subject: Re: Re: PEEING IN A WETSUIT.
Organization: Hewlett-Packard Singapore
Newsgroups: rec.scuba

I think there's also some kind of correlation between the "pee" and one's
diet. By drinking more water before the dive will keep the concentration
level low, making it less "corrosive" to the wetsuit.
Newsgroups: rec.scuba
From: peterson@hpl.hp.com (Chris Peterson)
Subject: Re: Boyancy control with drysuits
Date: Wed, 26 Aug 1992 20:07:05 GMT
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <CARL.92Aug26141137@atlantis.Cayman.COM> carl@Cayman.COM (Carl Heinzl) writes:
>
>>If my memory serves me properly, it only takes about 2psi overpressure to start
>>tearing the alveoli of the human lung.  If you do the numbers, there is more
>>than a 2psi increase from about 5fsw to the surface (closed, flexible vessel
>>like one's lungs while breath-holding).
>
>There is a 2psi increase EVERY 4.5 feet that you ascend, not just the
>last 4.5 feet!!!  Why is the last 5 feet any more dangerous than the
>1st (i.e. when you begin your ascent)???

	You're right: *any* 4-5fsw ascent with a blocked airway could
	cause rupture.
	
	The "last 5 feet" is important to me as an instructor because
	the first underwater scuba exercises in an OW1 class are usually
	performed in 4-5 feet of water where it is still possible for
	students to injure themselves.

	While injury is possible, it's also pretty easy to prevent:
	always breath normally on scuba.

	This is also a good reason not to loan scuba equipment to an
	untrained diver.
>
>I understand that the lung volume change in the last x feet is the
>largest percentage change.  Are there two separate mechanisms at work
>here?  The overpressure caused by 2 psi (every 5 feet of difference
>coming up from the bottom) as well as the large volume percentage
>change seen in the last x feet of ascent.
>
>-Carl-
>--

	I don't have any numbers for the volume changes.  I assume that
	there is some physical limit... 
	
	But due to the volume changes, I am most careful in the 5-10ft
	closest to the surface (I exhale fully as I start a descent,
	and I exhale continuously as I finish an ascent).
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA 
                                                            peterson@hpl.hp.com
Newsgroups: rec.scuba