HDTenEightyP/NetNews huggingface dataset:
From: njs@WATSON.IBM.COM (Nicholas J. Simicich)
Newsgroups: bit.listserv.scuba-l
Subject: prescription masks
Date: 12 Jan 93 19:20:14 GMT
Reply-To: Nick Simicich <njs@watson.ibm.com>
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU

>  Date:         Mon, 11 Jan 1993 11:14:26 EST

>  From: "Hugh A. Huntzinger (CCAC-LAD)" <huntzing@PICA.ARMY.MIL>
>

[...]

>
>  PS:  Computer-driven automated laser surgery eyesight correction has been
>  approved by the FDA and is now available, approximate price is $1500/eye.
>  No word on how soon it will be covered under medical health plans.

As far as I know, the radial keratotomy procedure is a
contraindication to diving.  I have no idea whether the computer
driven laser procedure is safer.

Nick Simicich (NJS at WATSON, njs@watson.ibm.com) -SSI AOWI #3958, HSA #318,
NAUI #14065
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Full-Name: Lawrence Leong
Mailer: Elm [revision: 66.25]
Newsgroups: bit.listserv.scuba-l
Date:         Fri, 8 Jan 1993 15:24:17 SGP
From:         Lawrence Leong <leonglaw@HPSGM2.SGP.HP.COM>
Subject:      Re: prescription masks
              7, 93 8:06 am

>          Tanya asked about prescription masks and other issues.  As
>          someone who has been diving with prescription masks since
>          1970 (off-shelf and glued-lenses), I can share my
>          experience.  The off-the-shelf prescription masks are okay
>          if they fit your face well and your prescription is
>          straight-forward (no astigmatism).  Check around at several
>          stores and try different brands of prescription masks; faces
>          are different and masks are different.  Find one that fits
>          well.  Off-the-shelf prescription masks usually come in
>          half-diopter increments up to diopter 6 or so.  If your
>          prescription is very close to an increment, then fine.  If
>          your prescription is between increments, you could get
>          lenses at the increment under your prescription since your
>          vision is slightly magnified underwater.  However if you are
>          doing beach-entry diving where you have to line up shore
>          landmarks far away, then you may want to get lenses at the
>          next diopter level above your prescription.

Peter Brueggeman writes:

>          If you have a
>          prescription above 6 diopters, then only a very few
>          brands of masks have lenses up to 8 diopters, TUSA being
>          one.  If you have a prescription up around 8 diopters and
>          the few masks available don't fit well, then consider
>          getting lenses glued to a mask that does fit.  If you have
>          astigmatism, then consider getting lenses glued to a mask.
>          I have no experience with contact lenses and diving.  I
>          assume one has to spit on the contact lenses to keep them
>          from fogging up like masks do :)

Tekna also goes up to 8dioptres.  I (fortunately) do not have astigmatism, but
my brother does.  His prescription is 6dioptres, but he uses 8dioptres to
correct for astig.  This must work since he hasn't bumped into coral yet :-).

Lawrence

--
-------------------------------------------------------------
Lawrence Leong            Telnet:       520-2732
Barcodes Manufacturing    Voice:  (+65) 279-2732
HP Singapore              Fax:    (+65) 273-0848 or 278-5319
                          e-mail: leonglaw@hpsgm2.sgp.hp.com
Newsgroups: bit.listserv.scuba-l
From: tstead@cs.umr.edu (Tim Steadham)
Subject: Re: Nose repairs
Date: Wed, 6 Jan 1993 02:41:27 GMT
Organization: University of Missouri - Rolla, Rolla, MO

In article <SCUBA-L%92123104144324@BROWNVM.BROWN.EDU> Tim Chase <A3TC@PSUORVM.BITNET> writes:
>I just had my broken nose fixed and I was woundering if any of the
>listers out there have ever had a broken nose and sinus work done.
>
>Now the question is, what changes have you noticed after the work was
>done with your diving. I have yet to go diving because I just  had
>the work done. I did not have any problems clearing my ears before,
>but the Doc said that I needed to get my beek fixed and I had some
>sinus problems that were related to my bone being out of place.
>
>Thanx Tim Chase Computer Operator Specialist PSU

Eeeekkkkk... I just hope pinching your nose doesn't hurt too much!
Hmm, well if you do have some sinus probs, maybe you shouldn't go down.  I had
a sinus prob once, and I went down and well...I had a little trouble clearing
my ears going down, but coming up was an entirely different ball park!  However,
that was when I was an open water diver.  Now that I have turned to cave diving,
I have realized that mistakes, of any sort, just cannot be made.  If you are
talking about going into a confined area, I say absolutely do not do it, and if
you are not, I say absolutely do not do it.  Your life is not worth the risk.
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Newsgroups: bit.listserv.scuba-l
Date:         Tue, 5 Jan 1993 23:14:00 EST
From:         "Reef Fish (Large Nassau Grouper)" <RFLNG@CLEMSON.BITNET>
Subject:      Sharks (NBC Dateline segment)

Just finished watching the segment on Dateline (NBC) featuring diving with
sharks at Coco Island on the Okeanos Aggressor.  It brought back vivid, fond
memories of my dives there in July.  The dive sites (names not mentioned on
that program) were Manuelita and Dirty Rock.

The segment had some really nice shots of a large school of hammerheads, at
unusually close range and relatively shallow depths (90').  Also, the shots
of manta rays were great too.  I actually recognized one of them -- from its
size and markings.

I wonder how many people on this net saw that segment, and what they thought
about diving with sharks after seeing the segment (assuming they haven't
dived at Coco Island before).

How I wish I could have greeted the New Year diving with those sharks|

-- Bob.
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Newsgroups: bit.listserv.scuba-l
Date:         Wed, 6 Jan 1993 10:49:58 PST
From:         Peter Brueggeman <brueggep%sandnet.UCSD.EDU@SDSC.BITNET>
Subject:      Bull sharks

          Reading shark attack reports in Oregon, Hawaii, etc, I
          thought some terrestrial mammals in the Mississippi River
          basin might enjoy hearing about the bull shark "Carcharhinus
          leucas" and its reported appearance long ago in Illinois.
          The following information is paraphrased from "FAO Species
          Catalogue, Vol 4 Part 2, Sharks of the World" and the
          journal article cited.

          The bull shark can be found far from the ocean up freshwater
          rivers and into freshwater lakes.  Bull sharks are
          distributed worldwide along the continental coasts of all
          tropical and subtropical seas.  Bull sharks are the only
          wide-ranging shark that penetrates far into freshwater and
          is able to exist there at length.  It is the only shark
          known to be able to deal with the osmotic demands of either
          fresh water or sea water for periods of at least months and
          probably years.  It probably ascends any river within its
          range that has suitable depth, current, temperature and
          animal food, and no physical obstructions, ie dams.  The
          bull shark is one of the most dangerous species of tropical
          sharks, and is one of the three most dangerous sharks by
          numbers of attacks record on people (other two being the
          great white and tiger sharks).  Bull sharks reach up to 10
          feet in length and has massive jaws and proportionately very
          large teeth.  Bull sharks have been known to eat terrestrial
          mammals in whole or part, including antelope, cattle,
          people, tree sloths, dogs and rats.

          In the US, bull sharks venture up the Mississippi and
          Atchafalaya Rivers.  A 5-ft bull shark was found in the
          upper Mississippi River near Alton, Illinois in 1937; at the
          time, this was 2800 river kilometers from the Gulf of Mexico
          [Copeia 1977 (1): 166-168].  The Mississippi river meets the
          requirements during summer months and early fall, when water
          temperature rises to 24-26 C.  Bull sharks have also been
          reported at Simmesport, Louisiana at least 300 kilometers
          from the Gulf and near Jonesport, Louisiana 440 km from the
          Gulf.  Record distances for the bull shark is 3700 km up the
          Amazon and 4000 km from the sea at Iquitos, Peru.

          Peter Brueggeman, UCSD Scripps Institution of Oceanography
          Library, pbrueggeman@ucsd.edu
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
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Date:         Wed, 6 Jan 1993 10:05:03 PST
From:         Peter Brueggeman <brueggep%sandnet.UCSD.EDU@SDSC.BITNET>
Subject:      pony bottle advice needed

          I recently obtained a 13cf pony bottle and ask for advice on
          mounting it.  I will be carrying it on almost all dives and
          I shuffle between using two main 80cf tanks.

          1) What is your recommendation on how and where to mount the
          pony bottle?

          2) If you mount it on the side of the main tank, do you
          counterbalance its weight with a lead weight or something on
          the other side of the main tank?

          3) I have heard of a male/female pin mount strapped onto
          main and pony tanks with stainless bands; is this a good
          setup and where do I get these mounts?

          Thanks,

          Peter Brueggeman, UCSD Scripps Institution of Oceanography
          Library, pbrueggeman@ucsd.edu
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Newsgroups: bit.listserv.scuba-l
Date:         Tue, 12 Jan 1993 11:03:05 EST
From:         "Richard H. Moore" <R200213@UNIVSCVM.BITNET>
Subject:      Re: Bull sharks
              12 Jan 1993 14:32:41 IST from
              <CCBLAUN%TECHNION.bitnet@VM.TAU.AC.IL>

Actually ichthyologists consider all these to be varieties of the bull shark
C. leucas.  The Lake Nicaragua sharks regularly migrate between the lake and
the sea, so are also found in the Rio San Juan.  Bull sharks are quite tolerant
of fresh water and are also known from Lake Maracaibo (Venezuela), the Panama
Canal, Brisbane Australia and the Mississippi RIver as far inland as Alton I
Illinois.
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: bit.listserv.scuba-l
Date:         Mon, 4 Jan 1993 23:17:20 EST
From:         Jon Innes <INNES@UCC.UWINDSOR.CA>
Subject:      Re: Beak jobs, Nose fixes, and the Pressure
              31 Dec 1992 01:33:45 PST from <AHARDISON@FAB9.INTEL.COM>

I have had 5 (yes five!) broken noses including having two surgical repairs
and have made numerous dives.  There is no "strange effect" of diving after
a job.  Assuming that the doctor made sure that no sinus passages were
left blocked (sue if he left them like such) you should have no repercussions
from the procedure.  If the procedure was corrective, you may actually find
that your ability to equalize has been enhanced, making your descents more
pleasurable and effortless.  I am a DAN member and I do remember that DAN
newsletter once had an article about diving with mending bones, tissue etc.
The point made was that little is known on the effects of diving while
recovering from trauma such as a broken arm, and that diving should be
avoided while the body is healing from any major trauma.  You will find that
it takes a very long time before all swelling goes away from the "nose job"
so wait a while (a few months) and even then proceed with caution, decending
slowly and aborting the dive if pain occurs or if you can't equalize.
From: leej@sgi.com (Lee Jones)
Newsgroups: bit.listserv.scuba-l
Subject: Re: Bull sharks
Date: 12 Jan 93 17:54:32 GMT
Organization: Silicon Graphics, Inc.
NNTP-Posting-Host: diver.asd.sgi.com

In article <SCUBA-L%93011207511570@BROWNVM.BROWN.EDU> CCBLAUN%TECHNION.bitnet@VM.TAU.AC.IL writes:
>Its the Zambezy shark (Zambezensis), the Ganges shark (Gangeticus)
>and the lake Nicaragua shark (Nicaraguensis).

I thought that recently all of those species had been synonymized (?) to 
Carcharhinus lecuas - the bull shark.  Somebody can correct me on this?

Regards, Lee
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: bit.listserv.scuba-l
Date:         Mon, 11 Jan 1993 11:14:26 EST
From:         "Hugh A. Huntzinger (CCAC-LAD)" <huntzing@PICA.ARMY.MIL>
Subject:      Re: prescription masks

Peter Brueggeman writes:
>If your prescription is very close to an increment, then fine.  If your
>prescription is between increments, you could...
> ... However if you are doing beach-entry diving where you have
>to line up shore landmarks far away...


& Bob Claeson writes:
> ...My prescription is for a -6.05...wife is...+9.09...In my case I have
>used both my dive store and my optician to grind lenses and glue them in
>my mask of choice.



Take care in that you don't overemphasise the significance of any
mismatch between your correction and what's available off-the-shelf.
They key/problem is deciding/defining what is "close" and what isn't.

The last time I went to my Opthamologist, my myopia improved by a .25
diopter in both eyes.  It turns out that *I* hadn't changed...*he* did,
as he had changed his measurement methodology with the purchase of an
automated machine that does the measurements.  He explained that there's
about a +/-.25 diopter *error* in traditional test methodology.  The
machine isn't perfect, but it gets you closer by being a more uniform
tester...people will still vary day to day due to health, fatigue, etc.

The recommendation I got was that you don't need to worry about changing
your traditional perscription until it's off by .25 diopters or more
(although when you do change, you take your best guess, be it 4.09 etc).

For an off-the-shelf mask with .5 diopter increments, they'll always be
within this +/-.25 diopter measurement error (at least theoretically :-).
Assuming no other problems (significant astigmatism, prism, etc), they
should be satisfactory for most people most of the time.  This is still
only a generalization:  Peter's example of needing better resolution for
shore point allignment is a valid exception; needing Bifocals is another.
In any case, a perscription mask is worthless if it doesn't fit first.


Bob, continued:
> ...Generally I have had good luck except a lense will occasionally come
>loose at the worst time ( an extended diving vacation ).  I now have 2
>masks.  Most of the failures have occurred when moving from 1 island to
>another...

I've heard this repeatedly - gear redundency in the mask.
I've been fooling myself in hoping that I could modify on-site my backup
pair of eyeglasses into my uncorrected backup (ie, old) mask if need be.

-hugh


PS:  Computer-driven automated laser surgery eyesight correction has been
approved by the FDA and is now available, approximate price is $1500/eye.
No word on how soon it will be covered under medical health plans.
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Date:         Fri, 8 Jan 1993 14:34:47 EDT
From:         "Tanya J. Utt" <TJUTTX@TSRV1.TS.WM.EDU>
Subject:      Re: diving with contact lenses

=> dive. I guess it causes some sort of dehydration problems.
=>
=> >They are in the same environment
=> >as they normally are. Fogging up of masks is exactly the same as the fogging
=> >up of glasses...water vapour in the air contacting the cold glass surface
 and
=> >condensing. Lenses, which sit in the fluid at the front of the eye, are not
=> >subject to this phenomenon.
=>
=> Fogging up of contactlenses is not caused by condensation of water vapour,
=> but excess proteins which is formed in the fluids of our eyes. Spitting on
=> contact lenses thus won't do any good, you'll have to do something else to
=> get rid of the proteins.
=>



I started all of this <grin>... the problems I have found about
fogging lenses have been along the dehydration line.  I can sit and
stare at the computer or go through the day, but I have to rewet my
lenses a few times during the day.  This depends on humidity, and a
lot of other circumstances... but that's just what I have found  =)

-tanya

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
                                                                    |
tjuttx@tsrv1.ts.wm.edu                                              |
snshne@mail.wm.edu        ***SMILE, they will wonder what you are   |
                                                                    |
tanya@grissom.larc.nasa.gov             thinking!                   |
                                                                    |
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-





-Tanya


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

(tjuttx@tsrv1.ts.wm.edu)
(tjuttx@wmvm1.cc.wm.edu)
(tjuttx@mail.wm.edu)               :::Let's get dangerous:::
(tjuttx@news.cc.wm.edu)                -Darkwing Duck-
(snshne@mail.wm.edu)
(tanya@grissom.larc.nasa.gov)

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Subject: (no subject given)
Via: uk.ac.leeds.bio.vax; Fri, 8 Jan 1993 11:05:56 +0000
Originally-to: NSFNET%"scuba-l@brownvm.brown.edu"
Originally-from: WILMOT
Mailer: Janet_Mailshr V3.5 ( 13-OCT-1989 14:07:27 )
X-Info: Dept of Biochemistry & Molecular Biology, Univ of Leeds. LS2 9JT U.K.
Newsgroups: bit.listserv.scuba-l
Date:         Fri, 8 Jan 1993 11:04:34 GMT
From:         WILMOT@VAX.BIO.LEEDS.AC.UK

 Regarding diving with contact lenses. I wear contact lenses whilst diving,
as do many of my friends. The only time you are going to lose a contact
lens is if your mask gets ripped off and you have to open your eyes to find
the mask. That can occur, but is most likely in the middle of a surf entry
when you are still in air, and then being able to see is a positive advantage
when trying to grab a rapidly disappearing mask. If you are underwater, then
a good buddy may prevent you from having to open your eyes by recovering
the mask for you. Clearing a mask is no problem. Under most normal circumstances
you would clear your mask long before the water level reached your eyes. To
clear a completely flooded mask, just keep your eyes shut. Your only problem
is during open water training, when you will have to recover your mask and
equipment from the bottom of the pool. I too am as blind as a bat without
lenses. I took my open water class without lenses in, and always worked next
to the instructor. He demonstrated in exaggerated movements, and I could always
see what he was doing. When he signalled me to perform skills, he would come
close so I could see his signals clearly. I had no problems. I would recommend
diving with lenses. One of the major advantages that I find is that you can see
when you have your mask off both prior and subsequent to diving. The comment
about having to spit on your lenses is nonsense. Contact lenses will not fog
up due to being underwater with a mask on. They are in the same environment
as they normally are. Fogging up of masks is exactly the same as the fogging
up of glasses...water vapour in the air contacting the cold glass surface and
condensing. Lenses, which sit in the fluid at the front of the eye, are not
subject to this phenomenon. A final note. An article in Dive Training on
ways to correct vision in diving
said that even if you have to open your eyes with lenses in, it is still
unlikely that they will come out. Of course I have never tried this out. To
me the advantages of diving with lenses far outway the possibility that one
day I will have to open my eyes in water and lose one.

                            Carrie
                      wilmot@leeds.biovax
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Via: uk.ac.city-poly.tower-unix; Thu, 7 Jan 1993 00:56:51 +0000
X-Mailer: ELM [version 2.2 PL0]
Newsgroups: bit.listserv.scuba-l
Date:         Thu, 7 Jan 1993 00:56:15 GMT
From:         Cosma Papouis <papouis@TOWER-UNIX.CITY-POLY.AC.UK>
Subject:      Re: Waste of resources

>
> Thank you for your kind comments.  Since this list has nothing to do
> with anyone's work, only their avocations, perhaps the entire list
> is a waste of net resources!
> Maggie Rioux
> NAUI #5956
>
No, only pointless discussions on netiquett are a waste resourses!

--


  ============================================================================
  "Depression is when you go to your psychiatrist suffering with Paranoia and
   he tells you you're not paranoid... Everybody DOES hate you!!!!"

     E-Mail: PAPOUIS@uk.ac.clp.unixa    Snail: Mr. Cosma Papouis,
             C_PAPOUIS@uk.ac.clp.tvax          12 Coopers Lane,
  _____________________________________        Grove Park,
   Disclaimer:- I speak for no-one     |       LONDON, SE12 0QA,
                except maybe MYSELF!!! |       United Kingdom.
  ============================================================================
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: bit.listserv.scuba-l
Date:         Mon, 11 Jan 1993 09:48:16 EST
From:         "Nicholas J. Simicich" <scifi!njs@UUNET.UU.NET>
Subject:      pony bottle advice needed
              "uunet!BROWNVM.brown.edu!brueggep%sandnet.UCSD.EDU%SDSC.BITNET"

>            I recently obtained a 13cf pony bottle and ask for advice on
>            mounting it.  I will be carrying it on almost all dives and
>            I shuffle between using two main 80cf tanks.
>
>            1) What is your recommendation on how and where to mount the
>            pony bottle?

Personally, I find that the mount I use most often is one of those
bags from Sherwood, but I use the bottle on way more than two tanks,
and I carry it when I'm traveling.

>            2) If you mount it on the side of the main tank, do you
>            counterbalance its weight with a lead weight or something on
>            the other side of the main tank?

No, it falls easily into the realm of weight that I can balance as an
experienced diver.

>            3) I have heard of a male/female pin mount strapped onto
>            main and pony tanks with stainless bands; is this a good
>            setup and where do I get these mounts?

I've seen it in use.  It seems to work well for those who really only
use one or two tanks.  Switches real quick and all that.  But it makes
it hard to use while traveling.

>            Peter Brueggeman, UCSD Scripps Institution of Oceanography
>            Library, pbrueggeman@ucsd.edu

Nick Simicich - uunet!bywater!scifi!njs - njs@watson.ibm.com
SSI #AOWI 3958, HSA 318, NAUI #14065
Newsgroups: bit.listserv.scuba-l
From: Nicho@olympus.demon.co.uk (Gregory Stewart-Nicholls)
Reply-To: Nicho@olympus.demon.co.uk
Subject: Re: Which one is Better?
X-Mailer: ReaderS for the Acorn Archimedes
Date: Tue, 5 Jan 1993 17:38:21 +0000

 It's also worth finding out if the qualification given by your
chosen organisation will be recognised overseas. It's a bit embarrassing
to have a 'super-diver' certificate from Joe's dive school if no-one
will dive with you, or rent you equipment. This applies however skillful
Joe's instructors are.
 
----------------------------------------------------------------------------
  Greg Nicholls BSAC 

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