Mailing List Archive

Mailing List: techdiver

Banner Advert

Message Display

To: ttopping@we*.co*
Subject: Re: Intro & Experience with DRX
From: Jason Rogers <gasdive@sy*.di*.oz*.au*>
Cc: techdiver@opal.com
Date: Tue, 6 Sep 1994 14:34:11 +1000 (EST)
Hi Tom,

I'd just like to ask what the "maximum conservative factor" is?  In my
version I seem to be able to put in HUGE conservatism factors.  I've tried
out up to 1000, and the programme accepted it without any quams.  That level
gives a 10+ HOUR deco from a 50 metre/20 minute air dive, so I don't think
anyone would use that in real life.  Sheck recomended 100 in the manual that
came with the programme, but that seems a bit risky for the nitrogen, as it
gives an almost straight swiss table.  I use 130 for both air and mix which
seems to add 30% to air [nitrogen] dives and something more than 30% to mix,
 depending on the actuall mix.
Any help on this one is most apreciated.

Jason  :-)


> First the Introduction:
>
> My name is Tom Topping.
> I live and work in the Washington DC area, I dive locally(in Quarrys), off
> the coast(Mid Atlantic) and in caves(Florida & Mexico).  I am a certified
> Master Diver(choosing not to go the instructor route), Full Cave, Nitrox, and
> Trimix Diver.  I subscribed to the list about 3 weeks ago and postponed my
> intrduction until I had something to contribute.
>
> I have been intently following the latest DCI thread and have been
> particularly interested in the DRX comments; here is my experience.
>
> I was one of the two students in Sheck Exley's last trimix class.  The class
> consisted of two days of lecture with one dive each day.  Of course, there
> was great focus on DRX.  We used the maximum conservative factor settings in
> the program when building the tables for our dives.  Our bottom times were
> actually shorter than the times we used to generate the tables.  However,
> BOTH students were bent during the class.  We both had joint pain, his knee,
> my shoulder.     Sheck dove air.
>
> We dove to 200' and 220' with a bottom mix of HeleAir 14; switching to and
> from the bottom mix at 135'.  Our bottom times were very short, less than ten
> minutes.  We used O2 on our 20' and 10' stops.
>
> This note is not meant to malign Sheck or his accomplishments; I pass this
> along to further the discussion and to share my experience with those who
> utilize DRX.
>
> Good Diving ... Be Safe ...
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +   Tom Topping                             +
>                                                     +
> +   Wellfleet Communications       +      Life is choices: always choose to
> do what you        +
> +   (703) 739-6710  x15          +      will remember ten years from now.
>                  +
> +   (703) 739-1394  fax            +
>                   Richard Moran. +
> +   tnt@we*.co*                    +
>                                                   +
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> --
> Send mail for the `techdiver' mailing list to `techdiver@opal.com'.
> Send subscription/archive requests to `techdiver-request@opal.com'.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]