Sean,

May I ask how you obtain your tables, do you use deco software from some
such software house ? ie, Abyss, Voyager, et all.

Or do you use DCIEM, IANTD, TDI or some other training agency tables ?

Would it be a fair question to ask how your tables where generated, might
they have been generated by a third party " from an
electronic device " ?

I agree that the best dive computer is the one between your ears !! Carrying
a computer and a backup extract of your tables covering the planned dive
plus a contingency or two and decoing to the most conservative is not going
to harm you !!

Geoff. 

> -----Original Message-----
> From:	Sean T. Stevenson [SMTP:ststev@un*.co*]
> Sent:	Saturday, January 09, 1999 9:00 AM
> To:	Kevin Connell; Phi Le
> Cc:	TECHDIVER@AQUANAUT.COM
> Subject:	RE: Nitek3, Nemesis IIa Warts and All
> 
> In fact they are not the same, as the computer algorithms seem to be
> overly conservative, presumably for liability reasons, and will not
> generate the deep stops, so these have to be added manually.  I have a
> big problem with blindly accepting ceilings and stop times from an
> electronic device in this sort of environment.  Dive computers make it
> easier for persons to get in the water without properly planning the
> dive, and to wreak havoc on their physiologies with all sorts of weird
> sawtooth profiles.  Plus, if you and your buddies do not own the same
> model of computer, whose profile do you follow?  There are subtle
> differences in the algorithms used in all of these things, and the more
> "conservative" it is, the more likely the shape of the curve is
> complete nonsense.  Tables can not cease functioning, and so would seem
> to be the better alternative.  Admittedly this does take a little more
> time and effort, but then this goes back to OW1 - Plan the dive, dive
> the plan.
> 
> -Sean
> DIR(ODDIAA)
> 
> 
> On Fri, 08 Jan 1999 13:43:00 -0800, Kevin Connell wrote:
> 
> >Phi - They are the same model, but not the same program or environment.
> >
> >DC's are "real time", and must deal with real world data sampling.
> >
> >It's quite a bit easier and safer to validate whatever your deco software
> >is telling you on your PC rather then just trusting your computer
> underwater.
> >
> >Also, I believe (although I don't bother with a second timer myself) that
> >the optimal DIR is one bottom timer/depth gauge (pref. uwatec) and one
> >wristwatch.  The stopwatch is nice for timing interesting stops that
> aren't
> >on minute boundaries.  (Not that I do that either).
> >
> >
> >At 09:36 AM 1/8/99 -0600, you wrote:
> >>Sean,
> >>
> >>Aren't dive computer and decompression software more or less use
> practically
> >>the same deco model(s) ? On deeper dives, I cut tables too. But I was
> >>referring to week-end diving where one doesn't necessary dive deep or on
> >>trimix. May be I am off, but trimix is expensive here (Asia) and we
> don't
> >>use it on anything less than 40-50m.
> >>
> >>Again, I understand your feeling when it comes to certain unreliable
> >>computer (i.e. CockRing Nemesis). I did mentioned that my Nemesis IIa
> die
> >>when I still had considerable time left on deco.
> >>
> >>Just my $0.02 too :-)
> >>
> >>	Sean wrote:
> >>
> >>> I do not trust my decompression planning to any computer.  I use a
> Uwatec
> >>> BT and a watch, and cut tables for all dives. Just my $0.02
> >>> 
> >>> On Fri, 8 Jan 1999 00:26:38 -0600, Phi Le wrote:
> >>> 
> >>> >Brett,
> >>> >
> >>> >I agree with you, but I don't think anybody would buy the NiTek3 to
> use
> >>> solely as a bottom timer for trimix dives. It is just an added
> feature.
> >>> You should always have 2 timers anyway. So Uwatec and NiTek3 (in gauge
> >>> mode) would do it.
> >>> >
> >>> >Plus you have a computer for 'everyday' diving. Let's face it, most
> >>> people don't do trimix dive every week-end, and certainly most people
> >>> don't cut table for every dive. Do you have a computer ?
> >>> >
> >>> >Phi
> >>> 
> >>--
> >>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> >>Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> >>
> >>
> >------------------------------------
> >Kevin Connell  <kevin@nw*.co*>
> >
> >NW Labor Systems
> >http://www.nwls.com
> >
> >"I suppose you want a user interface 
> >with that.."
> >-------------------------------------
> >--
> >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> >
> 
> 
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