HDTenEightyP/NetNews huggingface dataset:
From: joseph@smos.com (Joseph Crunk)
Subject: Bottom Scratchers dive club
Organization: S-MOS, Inc
Date: Sat, 9 Jan 1993 21:56:28 GMT



# I am a current member of a dive club in Melbourne (Australia) called
# Melbourne Bottom Scratchers Dive Club

# Eng Sin Teoh
# engsin@anjing.meo.dec.com

The very first dive club ever, anywhere, was the Bottom Scratchers. They
were and still are active in the San Diego, Calif area. Your dive club is
most likely a result of someone from a spearfishing competition taking
the name back to Australia with them.

The Bottom Scratchers was founded as a 'diving' club. They did free diving
and spearfishing competitions with many members holding world records.
This is a very physically demanding sport and as such women were more
for the impressing than for the participating. Today, I don't think
many divers could keep up with the Bottom Scratchers of that era.

Back at this time, spearfisherman were some of the most physically fit
people and were, by definition, true athletes. Their pictures regularly
graced the pages of various sports magazines, with one magazine in
particular, Skin Diver, being founded specificly for the sport.

Today, Skin Diver magazine is for the 'tankers', folks with scuba. I'd
be surprised if the Bottom Scratchers hadn't gone the way of tankers also.

Suppose it's coincidence that the dive boat, the Bottom Scratcher, is
San Diego based?  NOT! :-)


-Joseph Crunk
 joseph@smos.com

Newsgroups: rec.scuba
From: mayne@pipe.cs.fsu.edu (William Mayne)
Subject: Re: M values and Buehlmann a and b parameters
Reply-To: mayne@cs.fsu.edu
Organization: Florida State University Computer Science Department
Date: Tue, 12 Jan 93 16:09:53 GMT

In article <1993Jan12.103556.1@elde1.epfl.ch> walz@elde1.epfl.ch writes:
>
>Could anybody tell me what is the relation between the Buehlmann a and b
>parameters and M values ?  The meaning of a and b is the following:
>
>  tolerated pressure = (compartment N2 pressure - a) * b

The short answer is:

M_0    = (a+1/b)*33
deltaM = 1/b

a = M_0/33 - deltaM
b = 1/deltaM

These are derived by simple algebraic manipulations. I haven't
seen them published, though others have posted the same results
on the net. WARNING: I haven't actually check this lately.
An explanation which may be more than you wanted to know follows.

The meaning of M_0 is the maximum pressure of inert gas in a
compartment which is tolerated at the surface. DeltaM adjusts
the tolerated pressure for depth, so M_d = M_0 + deltaM * d
for depth d (in feet).

Other than the choice of units the differene between the Buhlmann
formula and the Haldane formula is that Buhlmann computes the
pressure to which a compartment can be safely decompressed as a
function of the partial pressure of inert gas(es) in the compartment
and (modified) Haldane (the M_0-deltaM method) computes how much
inert gas is allowed in the compartment as a function of depth.
In other words they are essentially reciprocals of one another.

The Buhlmann form is more convenient for some purposes, especially
making corrections for altitude, which was one of his purposes.
The really critical part of either model is the choice of
parameters, not the algebraic form. The testing of Buhlmann's
parameters included diving in high altitude lakes. The USN
parameters were developed much earlier and testing was mostly,
if not entirely for sea level. Buhlmann's parameters are also
more conservative for most profiles.

The unit of pressure used by Buhlmann is "bar", where 1 bar = 10^5
newtons per square meter, which happens to be close enough to one
standard atmosphere (ATA) for practical purposes. The Haldane unit
of pressure is "fsw", the pressure of one foot of sea water.
A close enough approximation is 1 bar = 33 fsw. The formula given
above for M_0 as a function of a and b is derived by letting
the tolerated ambient pressure be 1 bar, solving for the pressure
of inert gas in the compartment, and converting from bar to fsw.
DeltaM and b are just the slopes of lines so no unit conversions
are necessary for them.

Bill Mayne
Newsgroups: rec.scuba
From: kkwwkk@mixcom.com (TA Shaw)
Subject: Re: FEMALE DIVE BUDDY WANTED, BOSTON
Organization: Milwaukee Internet Xchange BBS, Milwaukee, WI U.S.A.
Date: Thu, 07 Jan 1993 03:56:21 GMT

In article <1993Jan6.030433.15116@hubcap.clemson.edu> bob@hubcap.clemson.edu (Bob) writes:
>In article <1993Jan5.134249.1428@fmg.bt.co.uk> pky@fmg.bt.co.uk (Pete Young) writes:
>>Jordan Weinstein (jweinstein@igc.apc.org) wrote:
>>
>>: BOSTON AREA, SJM, 43, NON-RELIGIOUS, SELF-AWARE, SOMETIME-ACTIVIST, NEWS
>>
>>I take it you mean Boston, Lincolnshire?
>>
>>Get a clue, fuckwit. This is rec.scuba, a worldwide Usenet newsgroup.
>>Not a lonely hearts club for the terminally clueless. 
>>
>>Now go away and don't come back until you have something interesting
>>about diving to say, preferrably *after* you have discovered where the
>>CAPS LOCK key is.
>>-- 
>>  ____________________________________________________________________
>>  Pete Young        	  pky@fmg.bt.co.uk        Phone +44 473 227151
>> "Cast your bread upon the waters and you will get back... soggy bread"  
>
>     Agreed the first posting has no place here BUT, lets be mature
>here. Your flame is more imature than the original post! Lets not start
>flame wars here, if you do not like what someone posts then hit 'n'!
>
>Bob Staaf
>bob@hubcap.clemson.edu
>

Ditto!!!!

Tom
-- 
  May I walk in beauty.  Make my eyes      | TA Shaw          |        oOO 
  ever behold the red and purple sunset.   | shaw@mixcom.com  |  _____ OO 
  Make my hands respect the things you have+------------------| (_/-\_)..
  made, and my ears sharp to your voice - Chief Yellow Lark   | ==(0).
Newsgroups: rec.scuba
From: aa372@Freenet.carleton.ca (Mike Dusseault)
Subject: Re: Jacques Cousteau's dive gear??
Organization: National Capital Freenet, Ottawa, Canada
Date: Tue, 12 Jan 1993 20:20:33 GMT


The silver suit is so they have greater viz underwater.  FOr the camera's
you know.  The case on his back has (I believe) 3 small tanks in
it.  The case helps streamline the divers.  I have a magazine article
on that, but not right here with me.  If I'm wrong, or have anything
to add, I'll post it tomorrow.
-- 

                                                   --- Mike Dusseault ---
CIS: 73150,527
From: davea@hpscit.sc.hp.com (Dave Angelini)
Date: Tue, 5 Jan 1993 13:52:05 GMT
Subject: Re: Shots needed for Hondouras?
Organization: Hewlett-Packard, Santa Clara, CA
Newsgroups: rec.scuba

   How about the Hepatitis series ?

Newsgroups: rec.scuba
From: aa372@Freenet.carleton.ca (Mike Dusseault)
Subject: Re: Mixed gas algorithms
Organization: National Capital Freenet, Ottawa, Canada
Date: Fri, 8 Jan 1993 18:38:43 GMT


Once I get the program working with different gasses then nitrogen, I will
run the deco's using the bottom gas(es).  It might prove interesting.
Anyways, thanks for the information.  Every little but helps.  I'm having
a wee problem with the variables at this time, although I plan to have
that solved soon.  Anyone out there ever have any problems with variable
scope in Turbo C v.2.01?  Argh.

-- 

                                                   --- Mike Dusseault ---
CIS: 73150,527
Newsgroups: rec.scuba
From: pyron@skndiv.dseg.ti.com (Dillon Pyron)
Subject: Re: "liquid Breathing" -long
Reply-To: pyron@skndiv.dseg.ti.com
Organization: TI/DSEG VAX Support
Date: Mon, 11 Jan 1993 21:15:42 GMT


In article <C0p7rB.5K3@ccu.umanitoba.ca>, jcurrie@ccu.umanitoba.ca (James Gordon Currie) writes:
>
>          Hmmm... The only problem I forsee is that ALL the methods of
>"liquid breathing" tested sofar, wash away the  cerfactants(sp) that exist
>in the lungs of the test subjects (some of which where divers who had 
>volunteered to undergo the test), causing total lung collapse in both (or,
>in one case where the test was done in only one of the diver's lungs, he 
>was breathing gaseous air in the other, the one breathing the "liquid air"
>collapsed) lungs, requiring an emergency treatment and a few days of 
>observation in the hospital. Until they can come up with a liquid medium that
>doesn't scrub away the cerfactants in a user's lungs, "liquid air" tanks for
>diving will remain in the realm of sci-fi.
>
>Ciao
>J G Currie

Hmm.  Could you provide some sources for these experiments.  I only know of
one, and the test subject, who only had one lung filled with the liquid, did
quite well, although he became quite sick after swallowing some of the fluid
(the reverse of aspiration???).

Thanks,
--
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)     |"Pacts with the devil are not legally
pyron@skndiv.dseg.ti.com          |binding!"
PADI DM-54909                     |-Friar Tuck   _Robin Hood:The Hooded Man_

Newsgroups: rec.scuba
From: story@sgi.com (David (Duis) Story)
Subject: Re: advanced certification
Organization: Silicon Graphics, Inc.
Date: Tue, 12 Jan 93 01:17:10 GMT

In article <1irap9INNqap@uwm.edu> mel@convex.csd.uwm.edu (Melissa Marie Pehl) writes:
>I just completed my book and confined water training for PADI's open water
>dive course and plan to do my open water dives in Florida over break.  I am
>going with my class and our instructors from the dive shop.  While we are 
>there the instructors told us that we could also complete the requirements 
>for our advanced certification.  Since we have not really received any 
>instruction or training yet on the required dives, I wondered if anyone
>could suggest some books or reference materials I could read before I trip
>so that I am better prepared for the dives?

Two books (one of which your instructor should already have sold you):

PADI Adventures In Diving
NAUI Advanced Diver Manual

Cheers,

David Story                       NAUI AI Z9588, PADI DM 43922, EMT
story@bent.wpd.sgi.com		        Always check your Sources.
Newsgroups: rec.scuba
From: tstead@cs.umr.edu (Tim Steadham)
Subject: Decompression "games"
Date: Wed, 6 Jan 1993 02:34:04 GMT
Organization: University of Missouri - Rolla

Hey, this may sound silly at first, but are there any cool decompression
"games" that you play?  What I mean are things to entertain you while you
are making some of those long deco stops.  I tried checkers a few times, albeit
fun, but tipping the board over and having the pieces land in the silt can be
quite bothersome :*)  What have you done to pass the time and the N2 (sorry,
couldn't resist the pun *snicker*)
Hey, like I said, this may sound silly, but I am not in a serious mood right now, and I am really bored...so thinking of stuff like this is the only          
entertainment I can think of.  (By the way, ever try searching for black pieces
on the bottom of a cave floor?  Kinda funny, but not fun...can you say
boyancy control? ekkkk.. that was a disaster. :)
Laters,
Tim


P.S. anyone know of any wholesale place that sells caving supplies.  One thing
I am looking for are line markers.  Dive+Rite makes the only ones I have used
(and heard of for that matter) but at three bucks a pop for a ten cent piece
of plastic, I would welcome some other places!  Thanks in advance.
From: jbreeden@netcom.com (John Breeden)
Newsgroups: rec.scuba
Subject: Re: LIVE ABOARD RECOMMENDATIONS WANTED
Keywords: Live aboards
Date: 13 Jan 93 01:50:29 GMT
Article-I.D.: netcom.1993Jan13.015029.20507
Organization: Netcom - Somewhere in the S.F. Bay Area

In article <1ivlsbINNk9p@fido.asd.sgi.com> leej@sgi.com (Lee Jones) writes:
>In article <1993Jan12.205330.12230@netcom.com> jbreeden@netcom.com (John Breeden) writes:
>>
>>Just back from Kona - and the new Kona Aggressor II. This boat is a 90 foot
>>cat with a 35 foot beam. 5 double staterooms (10 divers max). Each room
>>has it's own head/shower and window! (this is not a "converted" boat. It
>>was built from the keel up for diving).
>
>I'm impressed.  When I was there at Christmas, Tom Shockley of Dive Makai
>was telling me that the boat was trapped in Oregon because of the winter
>storms and they had a January 4th charter.  You must have been on that 
>charter and they must have made it :-)

The boat arrived Dec 30 (yes, it was stuck in Fairbanks for a few days,
and they did make the Jan 4th charter). I have family that lives in Kona
and Joe U. (boat owner) is a next door neighbor - I've known the crew
for years.

>>
>>The new addition is The Shark Cage (sounds of Jaws music in the back-
>>ground :-). Two uses. Anchoring at the outer buoy and chumming for
>>tigers and pelagic white tips and night time drift diving in the 
>>open ocean (ala Howard Hall).
>
>Oh man, that sounds *so* cool.  Did you do/see any of the above?  On the 
>other hand, since Hawaiians are out killing tiger sharks as fast as they
>can find them, it's a wonder you would have seen any :-(
>

The cage wasn't there yet (but should be by now). When Gui gave me a 
walk around I asked him about the 12 foot notch (and hoist) at the stern,
that's when he told me about the cage and shark dives (Joe later told me 
about the intension of the "Howard Hall" drift dives using the cage).

As to the sharks, they arn't really present in any large number until the
summer (at least the pelagics) - so that's the time to go (I'm booked for
July - should have that 16mm full frame by then).

The killing of sharks is a pitiful thing to see - the state pays for it
which is the most tragic part - especially seeing that tigers are pelagic
so any shark they catch most likly had nothing to do with the attacks.

Thank God Yellowstone isn't in Hawaii - they would have wiped out the 
grizzly bears years ago.

Besides, it's really just God's way of letting the surfers know that it
REALLY isn't THEIR waves anyway :-)! (I guess the only thing more stupid
than sitting on the surface in a wetsuit LOOKING like a seal is to rent
a seal suit).

-- 

 John Robert Breeden, Hughes Lan Systems
          jbreeden@kailua.hls.com, johnb@hls.com, jbreeden@netcom.com

 ------------------- cut here and you'll break your monitor -------------------

      "The nice thing about standards is that you have so many to choose 
      from. If you don't like any of them, you just wait for next year's 
      model."
Newsgroups: rec.scuba
From: aa372@Freenet.carleton.ca (Mike Dusseault)
Subject: Re: Decompression "games"
Organization: National Capital Freenet, Ottawa, Canada
Date: Mon, 11 Jan 1993 23:29:17 GMT


That would be interesting, eh?  Actually, I heard today that some guy
just invented a portable computer which can be operated underwater!
Cool!  Just think of the possibilities.  Probably has a maximum
depth of, like, 20 Feet...
-- 

                                                   --- Mike Dusseault ---
CIS: 73150,527
From: sdodd@OES.ORST.EDU (Stephen M Dodd)
Newsgroups: rec.scuba
Subject: Oregon Shark Attack
Date: 5 Jan 1993 07:40:04 GMT
Organization: Oregon Extension Service, Oregon State University, Corvallis, Or.
Distribution: world
NNTP-Posting-Host: oes.orst.edu

Hi Everyone,

There has been a lot of discussion about shark attacks off Hawaii.  
I thought it might be interesting to the net to point out that there
was a shark attack off the southern coast of Oregon Sunday 1/3/93.
The attack was at Bastendorf Beach, on the south side of the Coos
Bay jetty.  The attack was upon a surfer, but the shark only hit his
board.  The bite size led to an estimate of about fifteen feet.  The
attack occured in about eight feet of water.  Warm water off the coast
was mentioned as a possible stimulus to the three shark attacks off
Oregon this year.  I grew up in Coos Bay and used to surf the beach
involved.  We never considered sharks in the sixties.  We did encounter
Killer Whales on occasion.

I find this of note because the water entries off the Oregon coast must
be only a miniscule fraction of those off Hawaii.  It seems to me that
the human exposure level in Hawaii must be thousands of times greater
than here.  If I am correct, then it is much more likely to get hit here
than in Hawaii!

Comments ...?

Steve

-- 
- Stephen M. Dodd, System Analyst, Oregon Extension Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sdodd@oes.orst.edu          Internet          Oregon State University
503-737-3550                                  Corvallis, OR 97331
From: ddj@gradient.gradient.com (david johnson)
Newsgroups: rec.scuba
Subject: Re: Decompression "games"
Date: 11 Jan 93 12:41:29 GMT
Organization: Gradient Technologies Inc., Hudson MA

waldo@cybernet.cse.fau.edu (Todd J. Dicker) writes:

>That's it!  Maybe we could convince Nintendo to create an underwater 
>housing for the Game Boy!

Even better, put in a slot for game cartridges in your deco-computer...
you don't want to get so engrossed you forget to watch the time. :-)

(on the other hand, I'd rather the game-boy flooded than the dive-comp;
let's not get too carried away).

	-- ddj
Newsgroups: rec.scuba
From: craig@cattnts.canada.ncr.com (Craig Campbell)
Subject: Re: FEMALE DIVE BUDDY WANTED, BOSTON
Organization: AT&T / NCR Canada Ltd., Toronto, Canada
Date: Mon, 11 Jan 1993 15:44:33 GMT

In article <1458600007@igc.apc.org> jweinstein@igc.apc.org (Jordan Weinstein) writes:

>Why are men threatened by this kind of posting and women not?

It is unlikely that anyone felt threatened.  Annoyed might be a better word.

>Are male divers so invested in the machismo of diving that an expression
>of emotional need (for love) is taken as a sign of weakness that must
>be attacked?

Actually no.  We're just so obsessed with diving that we don't really want
to discuss anything else here.  (i.e. Love, hate, religion, poetry,
sex (well MAYBE sex :-)...)

>To my mind, using rec.scuba to find a dive buddy/partner is
>as valid as using it to find a dive computer...both are connected to scuba,
>and no one, to my mind, has laid down any rules for the use of this
>conference.

Looking for a dive buddy is generally considered acceptable.  Looking for a
dive buddy who is a woman with certain non diving related attributes should
probably be reposted to one of the singles groups, with diving as a desired
attribute.  (Look for an SO that dives as opposed to a diver who will be an 
SO.)

>Or perhaps some of you think this is a club for boys only?  

Rubbish.

I'll let the intrigueing (sp?) group of dive babes handle that, but be
warned... They love to tease :-)  (Hi Liz, remember me?  :-))

craig

"All a person needs is a tremendous sex drive and huge ego.  
 Brains don't count for shit."
-- 
Craig Campbell		|	These opinions are entirely the result of a 
Systems Engineer	|	small butterfly crashing into the far side
NCR Canada,		|	of the planet.  Chaos Rules.
an AT&T Company		|	I speak for no one, except, possibly, myself.
Newsgroups: rec.scuba
From: dan@basil.eng.monash.edu.au (Dan Grimm)
Subject: Re: Personal Safety Equipment
Keywords: Flare Strobe Flag Safety
Organization: Electrical & Computer Systems Eng. Dept., Monash Uni.
Date: Tue, 12 Jan 1993 22:48:46 GMT

In article <1993Jan12.161047.2609@csd.uwe.ac.uk> rj_sande@chilli.uwe.ac.uk (Rob Sanders) writes:
>a worrying five minutes trying to attract the boats attention from a 1/4 of 
>a mile away. If they had not seen us, next stop Papua New Guinea !
>
>This made me think seriously about carrying some *Attention Grabbing*
>equipment with me. 
Flares are not common here in Melbourne, Vic. Australia.
What does get a little bit of use, you generally try to avoid needing it :-)
is the so called Safety Sausage or diver safety tube.
This is basically a six foot length of easily seen red or orange plastic 
tube.
The one I have appears to be a slightly thick continous red polyethlene 
plastic, which is roughly 6 foot by 10cm wide, one end is sealed. You can 
fold it up or roll it up. inflate it with your reg or mouth, hold the open 
end in your hand in the water and it sticks up about 5 foot out of the water.
the advertising says it can be seen up to a mile or two away.
Dan Grimm
Dept. Elec & Comp. Sys. Engineering, Monash Uni. Australia.
ph.(+61 3) 565 3479, Fax 565 3454,     dan@basil.eng.monash.edu.au

Newsgroups: rec.scuba
From: aa372@Freenet.carleton.ca (Mike Dusseault)
Subject: Re: Mixed gas algorithms
Organization: National Capital Freenet, Ottawa, Canada
Date: Mon, 11 Jan 1993 23:36:14 GMT


To "validity/sanity" check the models, extensive dive profiles can
be generated and compared to existing tissue models, and tables.  If
the results are too liberal, the model can be made more conservative
by simply decreasing the M-values.  This way, the results have
already been tested millions of times, and in virtually all conditions.
There can be a problem with very adventurous profiles, like a dive
to 2500 feet on Heliox of something, but then this program is not
intended for such experimental, support intensive, and really quite
rediculous profiles.  However, generating the tables for these
profiles is EXTREMELY facinating, in a theoretical fashion.
-- 

                                                   --- Mike Dusseault ---
CIS: 73150,527
Newsgroups: rec.scuba
From: engsin@anjing.meo.dec.com (Eng Sin Teoh)
Subject: ?? Bottom Scratchers Dive club ??
Reply-To: engsin@anjing.enet.dec.com
Organization: Digital Equipment Corp - Australia
Date: Wed, 6 Jan 1993 05:00:40 GMT


Hi,

I am a current member of a dive club in Melbourne (Australia) called

	" Melbourne Bottom Scratchers Dive Club"

The club have been in existence some 18 years.  I was just wondering if anyone
knows of any other dive clubs with the "Bottom Scratchers" name.  I have heard
that there was a skin diving club some where in the US (west coast I think) 
in the 50's/60's with a similar name.  Any body out there in rec.scuba old 
enough to recall....

we are planning to compile a "20 Years of Bottom Scratching" log/slide show.

Thanks

--

Eng Sin Teoh
engsin@anjing.meo.dec.com
From: dgoodin@pyrtech.mis.pyramid.com (Dianna Goodin)
Newsgroups: rec.scuba
Subject: Re: FEMALE DIVE BUDDY WANTED, BOSTON
Date: 12 Jan 93 20:24:34 GMT
Reply-To: dgoodin@pyrtech.pyramid.com.pyramid.com (Dianna Goodin)
Organization: Pyramid Technology Corporation

In article <1993Jan11.154433.5429@cattnts.canada.ncr.com> craig@cattnts.canada.ncr.com (Craig Campbell) writes:
>
>It is unlikely that anyone felt threatened.  Annoyed might be a better word.
>

And getting more annoyed by every follow-up post!

>to discuss anything else here.  (i.e. Love, hate, religion, poetry,
>sex (well MAYBE sex :-)...)

Craig, Gosh you sound familiar, have we met? */:-}

>I'll let the intrigueing (sp?) group of dive babes handle that, but be
                                              ^^^^^
             I don't think they certify anyone under the age of 16, so that
would leave the "Babes" out of this discussion.

>"All a person needs is a tremendous sex drive and huge ego.  
> Brains don't count for shit."

Since this group is for diving, does this last comment mean the seals are
endangered again? %-)

Bubbles up! 

Dianna
Newsgroups: rec.scuba
From: marcus@vestek.com (Mark Stephen)
Subject: Re: FEMALE DIVE BUDDY WANTED, BOSTON
Organization: Vestek Systems
Date: Mon, 11 Jan 93 17:47:00 GMT

     Maybe we should split the group and start a rec.scuba.dates ?

     Just a thought, Marcus




Newsgroups: rec.scuba