HDTenEightyP/NetNews huggingface dataset:
From: duis@sgi.com (David Duis)
Subject: Re: Re: truk lagoon trip - How many dives a day!!!
Organization: Silicon Graphics, Inc.
Date: Thu, 23 Jul 92 17:58:49 GMT

In article <1992Jul22.125258.29394@ultb.isc.rit.edu> awpsys@ritvax.isc.rit.edu writes:
>
>Everything I have heard is that reverse profile plans *do* work *if* divers 
>follow their computer or tables acurately.

This is NOT the case.  Reverse profiles are associated with a
higher-than-predicted incidence of DCS.  Haldanean models simply don't
account for what appears to be a physiological artifact which
increases bends incidence.

Several hypotheses exist, but the one which I find most believable is
that silent bubbles trapped in the lungs during the first level of the
profile are released during the subsequent, deeper levels of the
profile.  This same hypothesis helps explain why repetitive diving is
associated with higher DCS incidences.

Of course, the bottom line is pretty simple: repetitive and reverse
profiles incurs a greater nitrogen load no matter how you cut 'em.
More nitrogen --> greater bends incidence.  QED.

Cheers,

Dave Duis                        NAUI AI Z9588, PADI DM 43922, EMT
duis@bent.wpd.sgi.com           Better diving through inflatables.
From: ogborn@kaos.corp.sgi.com (Geoffrey S. Ogborn)
Newsgroups: rec.scuba
Subject: Re: mensuration and sharks?
Keywords: mensuration,blood,sharks
Date: 29 Jul 92 16:16:45 GMT
Reply-To: ogborn@corp.sgi.com
Organization: Silicon Graphic Inc.

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 was an article in a surfer magazine, some years ago, I read, about this very 
subject. Its conclusion, if I remember correctly, was that women do not release 
enough blood into the water to be a problem and any way to minimize the release
couldn't hurt.

============================================================================
Geoffrey Ogborn				* Success consists of getting up   *
DBA: Mosaic, Pricebook, A, ZEUS		*  getting up just one more time   *
ext 2404				*  than you fall.                  *
ogborn@kaos.corp.sgi.com
From: bsweet@pnet01.cts.com (Bill Sweetman)
Newsgroups: rec.scuba
Subject: Re: RE:  Saltwater Aquarium
Date: 23 Jul 92 22:16:07 GMT
Organization: People-Net [pnet01], El Cajon CA

=-=-=
[]
in response to Dan Kell's about 10 - 15 damsels ...
   in response to Juli Babel about $5 damesel ...

they're only $2 here in sunny SoCal.

ciao
-bill
=-=-=.s

S.E.A.  Systems Engineering Associates        Sunny San Diego, CA
  INET: sweetman@sea.com
          bsweet@pnet01.cts.com
   Voice: (619)581-6181  ext.305
    Fax:  (619)581-6184

#include <std_disclaimer.h>
=-=-=
Newsgroups: rec.scuba
From: rarobert@cs.utah.edu (Robin Roberts)
Subject: Re: Certification racket
Date: 28 Jul 92 14:50:01 MDT
Organization: University of Utah CS Dept
Distribution: rec.scuba

it really sounds like a problem with your friend's instructor - not 
the (any) certifying agency.  the agencies make RECOMMENDATIONS on 
sensible limits for novice divers.  

IMHO, her instructor is an example of the exception, rather than the
rule.  the instructor is acting unprofessionally, and should be avoided
in the future.

                             rr.

Newsgroups: rec.scuba
From: sracer@cecelia.media.mit.edu (Andy Hong (Go Speed Racer!))
Subject: Re: Diving headaches
Organization: MIT Media Laboratory Music Group
Date: Thu, 30 Jul 1992 19:22:52 GMT

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

Hey, round these parts, we don't get CO2 or sinus headaches, we get what's
commonly called the "Slurpee Burn."

You know, when you drink your slurpee too fast and your forehead starts
pounding.

You get the same effect when you first jump into really cold water.

--andy (who once dove in 34-degree-F water, had both his 2nd-stages freeze
        open, experienced slurpee burn throughout the dive, but still had a
        blast--all in a wetsuit!)
From: peterson@hpl.hp.com (Chris Peterson)
Newsgroups: rec.scuba
Subject: Re: Certification racket
Date: 29 Jul 92 19:13:04 GMT
Distribution: rec.scuba
Organization: Hewlett-Packard Laboratories, Palo Alto, California

In article <1992Jul29.175720.474@dale.ksc.nasa.gov> sdavis@laforge.ksc.nasa.gov (Steve Davis) writes:
>Robin Roberts writes
>> it really sounds like a problem with your friend's instructor - not 
>> the (any) certifying agency.  the agencies make RECOMMENDATIONS on 
                                                   ^^^^^^^^^^^^^^^
>> sensible limits for novice divers.  
>> 
>> IMHO, her instructor is an example of the exception, rather than the
>> rule.  the instructor is acting unprofessionally, and should be avoided
>> in the future.
>
>  Actually, the situation Steven describes sounds exactly like the PADI basic  
>open water guidelines.  A PADI instructor who recommends daytime-only dives  
                                               ^^^^^^^^^^
>with a 60' depth limit for graduates of the basic class is not an exception;  
>s/he is following the rules.
>
>--
>+----------------------------------------------------------------+
>| 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>     |
>+----------------------------------------------------------------+

These are the guidelines for OW1 divers from NAUI too, and I believe, most 
US agencies.  It sounds like you both agree on the use of *recommendations*
though.

I believe that the problem lies with any instructor who brow-beats former
students for exceeding his/her recommendations (really *bad* attitude here).

Students are adults and deserve our respect.  Educate them.  Convince them that
the recommendations are sound.  Show them why.  Condemnation for past acts is 
not only "water under the bridge" but it's insulting.

The situation originally described could have been turned into an opportunity
to offer a deep diving class, a night diving class, and organize another dive 
trip just as easily.

"Macho" divers and impatient buddies are just as bad...

Always watch for indicators of *attitude*.  Attitudes are usually "invisible"
and not often examined.  However they are the foundation upon which all of our
actions are based. 

	"Would you trust this student to dive with your loved ones?"  

	"Would you trust this instructor to teach your loved ones?"
-- 
Chris Peterson                                     Hewlett-Packard Laboratories
                                                    Research Computing Services
                                                              Palo Alto, CA USA 
(415) 857-6432                                              peterson@hpl.hp.com
From: antae991@emory.edu (Howard D. Seidel)
Newsgroups: rec.scuba
Subject: Longboat Key
Date: 22 Jul 92 19:21:54 GMT
Organization: Emory University, Atlanta, GA
X-Newsreader: Tin 1.1 PL3

I'm going to Longboat Key (near Sarasota, FL) and would like to do
some diving there.  Can anyone recommend a good dive shop and/or
spots to see.  I will need to rent equipment and will be with
friends who want to go snorkling while I dive.
From: peterson@hpl.hp.com (Chris Peterson)
Date: Wed, 22 Jul 1992 23:28:36 GMT
Subject: NAUI Instructor Course (ITC)
Organization: Hewlett-Packard Laboratories, Palo Alto, California
From: pyoung@caiman.axion.bt.co.uk (Pete Young)
Newsgroups: rec.scuba,rec.boats
Subject: Information on Decca Navigator needed
Date: 27 Jul 92 13:06:37 GMT
Reply-To: pyoung@axion.bt.co.uk
Organization: British Telecom Labs
Organisation: BT Laboratories, Martlesham Heath, IPSWICH UK

Help.

I'm in need of a wiring diagram for a Decca Navigator Navstar A300D.

If anyone has a wiring diagram for one of these, please get in touch
with me <pyoung@axion.bt.co.uk> so we can work out a method of getting
it here. All offers gratefully recieved.

Also, if anyone has the name and address of the guy who designed
the case, I'd like that too so I can go round and break his fingers :-)

  ____________________________________________________________________
  Pete Young         pyoung@axion.bt.co.uk        Phone +44 473 645054
             BT Labs, Martlesham Heath, IPSWICH IP5 7RE UK
  "Seen on Pavlov's door: Knock. Don't ring bell." - mathew sutherland
From: peterson@hpl.hp.com (Chris Peterson)
Date: Wed, 22 Jul 1992 23:31:15 GMT
Subject: NAUI ITC - Audit-only
Organization: Hewlett-Packard Laboratories, Palo Alto, California
From: zimmy@ee.eng.ohio-state.edu (Michael Zimmerman)
Subject: Dive log Hypercard stack available for Mac
Originator: zimmy@bode.eng.ohio-state.edu
Organization: The Ohio State University Dept of Electrical Engineering
Date: Tue, 28 Jul 1992 14:37:10 GMT

For those divers with a Mac, the latest revision of a dive-log
Hypercard stack was just put at Sumex within the last few days.
Check the /info-mac/help/recent-files.txt list.
It requires Hypercard 2.1 I think it says.


Mike

-- 
                                               zimmy@ee.eng.ohio-state.edu
 Just say "noe" to Quayle. 
Newsgroups: rec.scuba
From: rees@laurel.ocs.mq.edu.au (Rees Griffiths)
Subject: Re: UW Photography Film
Organization: Macquarie University, Australia.
Date: Wed, 22 Jul 1992 03:03:59 GMT


     The basic choices in films for U/W photography fall into two groups

1)  Kodachrome either 25 ASA or 64 ASA.  Seems to be the choice of
professionals.  25 ASA being for Macro work and 64 ASA for wide angle.
Has a number of advantages such as overall colour accuracy, archival
qualities as well as a number of disadvantages such as narrow exposure
tolerance, doesn't always do greens well, commercial processing only, and
others I can't remember at the moment.

2)  E6 films.  Can be developed on board many charter boats.  There are
three main brand names.  From Fuji there is Velvia and Fujichrome.  From Kodak
there is Ektachrome.  Velvia is apparently an expensive 50 ASA professional
film.  Chris Newbert reviewed it in an issue of Ocean Realm with a
comparison to Kodachrome (if anybody is interested I'll dig out the
issue info).  Basically a very good film though.  Fujichrome comes in various
ASA ratings.  I'm using 100 ASA.  Along with Ektachrome it can really
enhance those mid-water blue shots giving a not exactly true to life rendition
and some other colours can be, lets say vibrant giving some very strong
images, if not exactly life like.  Ektachrome is available in 50 ASA and
100 ASA and others and is available as professional 64 ASA as well (for bulk
loading).

    There are other E6 films such as Agfachrome which I used once and never
did again.  So you could experiment if you feel the need.

Summary would be that there is no film that will universally be best
for every occasion.  It will boil down to the types of photographs you
take, where you take them and your personal tastes.  For myself I may goto
Kodachrome 25 ASA for macro work and stick to an E6 for wide angle.  But
as I have 30 rolls in the fridge any change is while off yet.

Good luck, safe diving etc.

Rees
_________________________________________________________________________
Snail: Rees Griffiths, Computing Officer
       School of Biological Sciences, Macquarie University
       N.S.W.  Australia   2109
Phone: (02) 805 8202  Facsimile: (02) 805 8245  Intnl +61 2 805....
                                                              <<<<<>>>>>
email               "rees@laurel.ocs.mq.edu.au"               <<<<43>>>>
                                                              <<<<<>>>>>
*************************************************************************
"There you stand like a duck in a thunderstorm again,
aren't you ever going to understand".  W.A. MOZART.
*************************************************************************
P.S.  This message is transmitted with 100% recycled electrons
Newsgroups: rec.scuba
From: mjs@hubcap.clemson.edu (M. J. Saltzman)
Subject: Death on the Andrea Doria
Organization: Clemson University, Clemson SC
Date: Fri, 24 Jul 1992 17:06:52 GMT

This group is starting to get a bit morbid!

I was on Long Island last week, and I saw a report of a diver killed
while diving on the Andrea Doria wreck off the shore there.  I heard,
but only as a second-hand report on a news story, that the diver 
was found inside the wreck with no safety line.  The same person
originally told me two divers were killed, but a subsequent article
in the paper only mentioned one diver and had nothing to say about 
the situation or the cause of death.

Any one else know any more?

-- 
		Matthew Saltzman
		Clemson University Math Sciences
		mjs@clemson.edu
Newsgroups: rec.scuba
From: rarobert@cs.utah.edu (Robin Roberts)
Subject: Re: Certification racket
Date: 29 Jul 92 14:26:05 MDT
Organization: University of Utah CS Dept
Distribution: rec.scuba

In article <1992Jul29.175720.474@dale.ksc.nasa.gov> sdavis@laforge.ksc.nasa.gov (Steve Davis) writes:
>Robin Roberts writes
>> it really sounds like a problem with your friend's instructor - not 
>> the (any) certifying agency.  the agencies make RECOMMENDATIONS on 
>> sensible limits for novice divers.  
>> 
>> IMHO, her instructor is an example of the exception, rather than the
>> rule.  the instructor is acting unprofessionally, and should be avoided
>> in the future.
>
>  Actually, the situation Steven describes sounds exactly like the PADI basic  
>open water guidelines.  A PADI instructor who recommends daytime-only dives  
>with a 60' depth limit for graduates of the basic class is not an exception;  
>s/he is following the rules.
>
i guess that my point was that PADI (or any other agency) makes RECOMMENDATIONS
and specifys GUIDELINES - for instance, the 60' limit, etc.  they are not, 
however, RULES.  that is, even the most strict certifying agency adherents
would/should not prohibit an Open Water (Basic) certified diver from making
dives greater than 60', etc.  it is the intent of the certifying agencies
to give new divers some ideas about reasonable limits for the novice.  it is
not their intent to REQUIRE advanced training in order to exceed the recommended
limits.  (it is their HOPE that divers will seek advanced training, though :-)

the original post on this subject made me think that the instructor in question
used words that indicated to the diver that she had violated strict rules, 
instead of a comment that she ought to be careful about exceeding recommended
limits.  it seemed to me to be a semantics issue, as well as potentially
poor judgement on the part of the instructor.  
 
it's easy for people in authority to mis-represent guidelines as rules, and 
vice versa.  of course, we don't know if this particular instructor always
bullies former students into believing that they MUST have further training
in order to expand their diving experiences, or if he/she was just having
a bad day - and inadvertently gave the wrong impression about rules versus
recommendations.
 
hope this clears up the intent of my original posting!  :-)
 
                                 robin roberts
                                 dm-51077
From: leej@sgi.com (Lee Jones)
Newsgroups: rec.scuba
Subject: Re: Are ther YMCA dive agencies in Australia ?
Date: 21 Jul 92 22:01:49 GMT
Organization: Silicon Graphics, Inc.

In article <1992Jul21.172342.5289@hplabsz.hpl.hp.com> peterson@hpl.hp.com (Chris Peterson) writes:
>
>Yeah, even some of us hard-core NAUI instructors have started to omit the
>forward roll from pool work (I've never seen anyone use it in OW classes).
>Consider it a slight bend back to reality... :-)
>
At the beginning of my teaching career, I taught the forward roll.  After
watching a number of my students bang their heads on tank valves
and *never* seeing anybody do one in real life, I stopped teaching it.
The only thing I've regretted about that decision is not making it earlier.
If you won't tell NAUI, I won't either :-)

I have also seen the UDT/Hawaiian rock entry done on boats in the Channel
Islands.  The people who did it are major macho divers - I was 
singularly unimpressed, particularly because some of those folks were 
instructors who had students *on that boat*.  There may be a good use
for that entry, but I haven't found it yet.

Regards, Lee
From: steve_lemme@gateway.qm.apple.com (Steve Lemme)
Newsgroups: rec.scuba
Subject: Wanted Sony housing
Date: 28 Jul 92 15:50:14 GMT
Followup-To: rec.scuba
Organization: Apple Computer

I am looking for information, pricing and a unit if possible. I wish to
take my Sony 501 video camera down under. Any reccomendations, hints, tips.

Thanks
Steve
Newsgroups: rec.scuba
From: m16532@mwunix (Steven Bayer)
Subject: Certification racket
Organization: Mitre Corporation, McLean VA
Distribution: rec.scuba
Date: Tue, 28 Jul 1992 15:15:51 GMT

Recently, a woman went with me and nine other experienced divers to 
Roatan (CocoView).  She had recently been certified for basic Open 
Water I (the organization's name doesn't matter).  We were careful
to make certain she was at ease and not diving beyond her experience,
we even buddied her up with an excellent dive master for her first 
few dives. When she got back to the states, she was chastised by her
instructor for diving below 60 ft. and for going on a couple of night
dives. Ok, prepare to flame me (I'd prefer to be educated if I'm wrong,
but even flames can be educational)...

When one of my dive partners learned to dive many years ago, he had to 
go through a very extensive and long series of classes and pool sessions,
followed by serveral open water checkouts.  He learned all about dive
safety, navigation, had to ditch his gear, swim a bunch, learn to id lots
of animals, etc. He is rather appalled at the level of instruction given today.

When I was certified several years ago, this had been reduced to several 
classes and pool sessions with a very simple open water checkout. I never 
had to ditch my gear, never used a compass, only had to swim a couple of laps,
learned nothing of dive safety (i.e., helping others), etc. Fortunately, 
I'm a good self learner. I was also told that "recreational diving" was 
done above 120 feet.  

Now, my friend gets certified and is told not to dive below 60 without
taking another class, cannot dive at night with experienced and very
cautious dive buddies without taking another class, is taught nothing of
navigation or safety without taking another class, etc. What kind of 
racket have we gotten involved with that is more interested in making
more and more money and less interested in teaching us to become safe and
educated divers, and even "experienced" enough to dive within the recreational
limits after becoming certified? 

                     __o                                          
                    ~\<,                                          
___________________()/ ()______________________________________________________
Steve Bayer                                          bayer@galileo.jsc.nasa.gov
The MITRE Corporation                                            (713) 333-0978
1120 NASA Road One, Suite 600                                Houston, TX  77058

Newsgroups: rec.scuba
From: sdodd@OES.ORST.EDU (Stephen M Dodd)
Subject: Re: How to stop sucking air?
Organization: Oregon Extension Service, Oregon State University, Corvallis, Or.
Date: Tue, 21 Jul 1992 20:46:04 GMT

In article <1992Jul20.183157.3776@berlioz.nsc.com> raisty@berlioz.nsc.com (Sue Raisty) writes:
>Oops.  I messed this post up the first time...
>
>I'm a newly cerified open water diver and I have this problem:
>I breathe too much.  Way more than everyone else I dive with.
>So is there anyway to stop sucking so much air?  I do try to 

 Get one of the new 3500 DIN tanks ... lots more air, and smaller too.
 :-)
  
 You'll get better with experience.

 Steve
-- 
- Stephen M. Dodd, System Analyst, Oregon Extension Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sdodd@oes.orst.edu          Internet          Oregon State University
503-737-0699                                  Corvallis, OR 97331
From: 21329KAD@MSU (Kim Dyer)
Newsgroups: rec.scuba
Subject: Re: Diving as a Religion?
Date: 22 Jul 92 02:08:49 GMT
Organization: Michigan State University

>> Jacques Ives Cousteau is equivalent to the Pope.

><Gag>  I think I'd prefer to think of him as The Buddha of divine diving.
>(NOT a religious flame!!!)

None inferred.  I only used "Pope" as a term for primary religious
leader.  Perhaps a more reflective image is more appropriate ... but the
traditional Budda is in AWFUL condition to go diving.  Maybe we need
to coin a new name for the leader of our great religion.  Holy Master
of Dive-inty, perhaps.
************************************************************************
*  KIM DYER                    *                                       *
*  208 COMPUTER CENTER         * Had I known this long ago,            *
*  MICHIGAN STATE UNIVERSITY   * I might not have come this way at all *
*  E. LANSING, MI  48824       *                                       *
*                              *                          - Al Stewart *
* 21329KAD @ MSU.BITNET        *                                       *
* 21329KAD @ IBM.CL.MSU.EDU    *                                       *
************************************************************************
Newsgroups: rec.scuba
From: rogier@prl.philips.nl (Rogier Wester)
Subject: Re: UW Photography Film
Organization: Philips Research Laboratories, Eindhoven, The Netherlands
Date: Wed, 22 Jul 1992 06:13:04 GMT

In article <jydm6#p@lynx.unm.edu> mulberry@triton.unm.edu () writes:
>I would like to know from other people their opinions on using
>other films, like Fuji, the advantages, disadvantages, special
>shooting techniques used with various films, etc., etc.

I used FujiChrome 100ASA slides in the Red Sea. The pictures at close
distance were very good, at larger distances it tended to get bluish fast.
Some other divers recommended KodaChrome for waters with lots of vis and 
were happy with FujiChrome in darker waters. This is only second hand info.

Just my $0.02

Rogier.
-- 
--------------------------------------------------
Rogier Wester
Philips Research Laboratories, The Netherlands.
e-mail: rogier@prl.philips.nl
Newsgroups: rec.scuba
From: clampin@scivax.stsci.edu
Subject: Re: the forward roll
Organization: Space Telescope Science Institute
Distribution: na
Date: Wed, 22 Jul 1992 18:47:23 GMT

> 
>>At the beginning of my teaching career, I taught the forward roll.  After
>>watching a number of my students bang their heads on tank valves
>>and *never* seeing anybody do one in real life, I stopped teaching it.
>>The only thing I've regretted about that decision is not making it earlier.
>>If you won't tell NAUI, I won't either :-)
> 

One possible application of the forward roll are the occasions when your
hands are otherwise occupied eg. holding a camera. The forward roll, when
done properly, does not require you to hold your mask/mouthpiece etc. 


Newsgroups: rec.scuba