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- Newsgroups: rec.scuba
- Path: sparky!uunet!cs.utexas.edu!csc.ti.com!tilde.csc.ti.com!mksol!usenet
- From: pyron@skndiv.dseg.ti.com (Dillon Pyron)
- Subject: Re: Down Currents (Was Cancun or Coz)
- Message-ID: <1992Nov20.150419.18751@mksol.dseg.ti.com>
- Lines: 79
- Sender: usenet@mksol.dseg.ti.com (Usenet News)
- Nntp-Posting-Host: skndiv.dseg.ti.com
- Reply-To: pyron@skndiv.dseg.ti.com
- Organization: TI/DSEG VAX Support
- References: <9211190742.AA26645@deepthought.cs.utexas.edu> <1992Nov19.154259.15654@resonex.com>
- Date: Fri, 20 Nov 1992 15:04:19 GMT
-
-
- In article <1992Nov19.154259.15654@resonex.com>, dan@resonex.com (Dan Kell) writes:
- >In article <9211190742.AA26645@deepthought.cs.utexas.edu> RFLNG@CLEMSON.CLEMSON.EDU (Reef Fish , Large Nassau Grouper) writes:
- >>kkwwkk@mixcom.com (TA Shaw) <1992Nov18.151430.14419@mixcom.com> says
- >>
- >>> b) I was told that from time to time, the currents that run off the
- >>> wall can be dangerous. That if the conditions are right, it actually
- >>> can be like flushing a toilet, ie the current is so strong running
- >>> over the and down the wall that it will drag divers down even if
- >>> their BC is inflated? Anyone else heard of this?
- >>
- >>IMO this "death grip down current" is one of the popular diving myths,
- >>I've done hundreds of dives in Cozumel ... the current can be VERY swift,
- >>at times, but I've NEVER experienced the slightest "current running over
- >>and down the wall", in Cozumel, or in other swift-current sites.
- >>
- >>In all reported cases I've heard or read about "strong down current", an
- >>analysis could be made that the diver simply lost buoyancy control (usually
- >>an inexperienced diver, forgetting to inflate the BC at depth to compensate
- >>for wet/dry-suit/BC-compression) to cause the "down draft", and by the time
- >>such diver realizes s/he is being "dragged down", no inflation of BC is
- >>going to arrest the descent instantaneously -- and so the current gets
- >>blamed for the down-dragging, and inexperience/panic distorted the rest of
- >>the explanation.
- >>
- >
- >There was a discussion, some months? ago, about this phenomena. It does
- >exist. I read an article some time ago in National Geographic about Monterey
- >bay that talked about down currents being an erosive force in the Monterey
- >Canyon. Cozumel was mentioned in the discussion quite extensively if I
- >remember right. I seem to remember something about the sand falls down
- >there also. What ever.
- >
- >I tend to disagree that loss of buoyancy control can be blamed for this.
- >Even a brand new diver should be able to feel the difference between being
- >pushed down by a current and descending due to being negatively bouyant.
- >I know the first times I dove anywhere with a current I gained a very
- >quick and real appreciation of just how helpless you are in a current.
- >Big strong macho divers that we are (you ladies seem to have more sense
- >than us males B-) ), we are not fish. I sure can't out swim anything
- >we fins, I've tried. Somebody made the comment that if caught in a
- >down current to swim towards the wall. I remember the consensus being
- >that swimming away from the wall was the quickest way out of the
- >current. (Somebody mentioned swimming toward the wall, this may do
- >nothing more than getting you smashed into the wall and pushed deeper.)
- >
- >If I'm wrong please feel free to correct me. B-))
- >
- >
- >--
- >Dan Kell
-
- In all my dives in CZM, I've never experienced "the killer current". Doesn't
- mean there isn't one. I really can't believe the Belize story. Any current
- that can suck you down that fast is going to kill you if you're asleep, you're
- going down too fast for any rescuer.
-
- My experience at Santa Rosa was that the landform/reef striations are at an
- angle. My buddy and I found ourselves 20 ft deeper than we planned, because
- we were following what we thought to be flat lines. Oooops!
-
- Cosumel is, for most divers, a very different environment. I learned a lot of
- my dive skills there, but for others, it might be tough at first. And with
- some of the grade A bull being bandied around about "killer currents", the mind
- gets set.
-
- Down currents in Cozumel, probably. Killer down currents elsewhere, most
- likely. Killer down currents in Cozumel, not that I've seen.
-
- STOP, BREATHE, THINK, PANIC
- >
- --
- 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_
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