Mailing List Archive Mailing List Archive
Hi !
Thanks very much for all your replies.
I have a clearer picture now.
As requested from some of you,i have enclosed some samples of
the replies
----------------------------------------------------------------------
Sheck used a 20% safety factor unless diving deeper than 300 feet he
used o% on thise dives and if the dive was longer than 40 minutes he
used 0%.
----------------------------------------------------------------------
I use a 20% safety factor with Doctor X as I know I don't have a PFO.
----------------------------------------------------------------------
I use DRX a couple of times a week on trimix dives and also on air and nitrox
dives. I am a woman and have a problem with skin bends so I do a lot of gas
changes and this minimizes the problem. I use the program with a 50% safety
factor. My husband uses it with a 15% safety factor. (he has a lot less fat
content to his body than I do!!)
----------------------------------------------------------------------
In reply to your request i use about 20% safety factor for 'normal' use. I
think that Sheck may have been hedging his liability bets in the US because of
the risk of getting sued.
----------------------------------------------------------------------
DRX is a piece of crap for trimix dives.
100% safety gives 100 for helium but 0 for
nitrogen.
Sheck was clearly more concerned with the helium,
but helium is the diver freindly gas, not nitrogen.
Buy/use another program.
I know of one diver who used 130%, with air/02
deco, and he was so long on the deep air stops
he got a nitrogen bend on a trimix dive.
And another who used 30% safety on a nitrox dive,
he did not realise 30% is a straight buhlmann
for a nitrox dive, and got bent too.
----------------------------------------------------------------------
We work on real time dive jobs using Dr. Ex. Our base of standard tables is the
work done for our group done in 1991 by Dr.
Bill Hamilton. Dr. Ex parallel's these tables with a 10% safety factor.
Interestingly enough, I had a conversation with Sheck before his accident and he
told me this is what he used.
----------------------------------------------------------------------
regards
Didi
(Zurich - TDI-Switzerland)
... ......... .. .. ..... .... . .. ...
.. ..... ......... ... .... .... ... . .... ..
^^^^
..******..
\ * O />
\\ . ** /> (O O) .... and the SCUBA-Diver says:
\\ * /> I "Shit happens all the time !"
//.** \> (*)
// *. \>
/ *.*.*.\>
* * * * * ******** * * * * * *** ***** * * ***** *
*********************************************************************
Didi Wagner ------------> didi@F1*.te*.ch*
*********************************************************************
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]