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John,

Interesting how this thread comes up every few months.  Didn't somebody =
post a 'bakers dozen' on why not to use a deco computer ?

My guess is that the people who recommending this stuff spend too much =
time surfing the web and too little time diving. =20

Norman recommends keeping a slate+ dive timer in your pocket, so he goes =
to all the trouble of cutting tables on a PC, writing them down but then =
he uses the VR3 on his dive, except in an emergency situation.  What is =
the point ?

Simon

----- Original Message -----=20
  From: John Grogan=20
  To: Norman Woods ; Don Burke ; Ian Puleston=20
  Cc: techdiver@aquanaut.com=20
  Sent: Monday, June 12, 2000 9:51 AM
  Subject: RE: VR3


  Norman,
  Can you or anyone else please explain to me what you actually learn =
about decompression by using a computer?
  Many thanks,
  John.
    Hi Ian
        The VR 3  http://www.vr3.co.uk/ mixed gas dive computer.
    Built for the job - depth rating 150 meters - Multiple gas choice =
'10' - switches can be done on the fly any time including changes from =
CCR to OC and back again - tracks CNS clock - advises air/back gas =
breaks - advises deep stops - user controls when to change gasses and =
personal safety factor settings - gives time, date, temp, ascent rate, =
feet or metric - has a back light - dive profile downloads to computer - =
can be used to generate next dive profiles/dive plans using history of =
previous dives - completely upgradeable - built like a nuclear bunker.
    Use it on all dives. But still keep slate and D/timer in pocket.
    Regards
      IP>I think computers in general are a very good thing. Maybe the =
right one for tech diving doesn't exist yet, but if it did it would beat =
working from tables any day.=20

      I believe computers have their place in no deco stop diving.  The =
procedure for recovering from a computer failure on a no stop dive is =
pretty simple:

      1. Go do a safety stop.  If you don't have a time reference, use =
air pressure as a guide.

      2. Get out of the water.

      3. Either get yourself straightened out on the tables or stop =
diving until you are off the tables.



      A computer failure on a deco stop dive isn't nearly that easy in =
that vital information about your deco obligation went away with the =
computer.  Perhaps one day there will be a computer with an independent, =
redundant system that can fix this properly.  There are other issues as =
well.

      IP>Anyway, I just purchased DecoPlan. I ran the profile of my last =
dive (145' for 30 mins on 24% EAN, deco on 50%) and using the default =
gradient factor settings it gave about the same total dive time as the =
Nitek 3, but with a very different set of stops.


      That's one of the other issues.  For instance, can you program for =
Pyle or WKPP stops?  I expect functions like that to hit the diving =
computers eventually.  Perhaps one that takes a PROM of some sort will =
come along.


      IP>One thing I particularly like about the Nitek is that with the =
PC logging program it will calculate my SAC, which for me at this stage =
is useful to know across a series of different real dives.

      The logging is one of the great functions of the computers.  In =
addition to being a backup for your own paperwork, it becomes a "black =
box" for diving accidents.  My Oceanic keeps data on what I have been up =
to over the last few dives.

      IP> Anyone know if its possible to get it to do this in gauge mode =
(i.e. it doesn't know about gas switches, so can these be input later =
for SAC calculations)?

      Do the people who make your Nitek have a website?

      IP>And a question on DecoPlan. The help says that the gas =
requirement calculation includes the reserve, but in non-metric mode the =
reserve settings in the preferences are ignored. So is the reserve an =
extra 50%?

      IP>Anyone know if the gas management features that are only =
available in metric mode are going to be implemented in non-metric at =
any time in the near future?


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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3D"Times New Roman">John,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3D"Times New Roman">Interesting how this thread comes up =
every few=20
months.  Didn't somebody post a 'bakers dozen' on why not to use a =
deco=20
computer ?</FONT></DIV>
<DIV><FONT face=3D"Times New Roman"></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman">My guess is that the people who =
recommending=20
this stuff spend too much time surfing the web and too little time =
diving. =20
</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3D"Times New Roman">Norman recommends keeping a slate+ =
dive timer=20
in your pocket, so he goes to all the trouble of cutting tables on a PC, =

writing them down but then he uses the VR3 on his dive, except =
in an=20
emergency situation.  What is the point ?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3D"Times New Roman">Simon</FONT></DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A href=3D"mailto:jgrogan@wo*.co*" =
title=3Djgrogan@wo*.co*>John=20
  Grogan</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
  href=3D"mailto:normanwoods@no*.fr*.co*.uk*"=20
  title=3Dnormanwoods@no*.fr*.co*.uk*>Norman Woods</A> ; <A=20
  href=3D"mailto:donburke56@ya*.co*" title=3Ddonburke56@ya*.co*>Don =
Burke</A> ;=20
  <A href=3D"mailto:DiverIan@pa*.ne*" =
title=3DDiverIan@pa*.ne*>Ian=20
  Puleston</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A=20
  href=3D"mailto:techdiver@aquanaut.com"=20
  title=3Dtechdiver@aquanaut.com>techdiver@aquanaut.com</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, June 12, 2000 =
9:51 AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: VR3</DIV>
  <DIV><BR></DIV>
  <DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
  class=3D100435007-12062000>Norman,</SPAN></FONT></DIV>
  <DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D100435007-12062000>Can=20
  you or anyone else please explain to me what you actually learn about=20
  decompression by using a computer?</SPAN></FONT></DIV>
  <DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D100435007-12062000>Many=20
  thanks,</SPAN></FONT></DIV>
  <DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
  class=3D100435007-12062000>John.</SPAN></FONT></DIV>
  <BLOCKQUOTE=20
  style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
    <DIV><FONT face=3DArial size=3D2>Hi Ian</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2>    The VR 3  =
http://<A=20
    href=3D"http://www.vr3.co.uk/">www.vr3.co.uk/</A> mixed gas =
dive=20
    computer.</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2>Built for the job - depth rating =
150 meters -=20
    Multiple gas choice '10' - switches can be done on the fly any time=20
    including changes from CCR to OC and back again - tracks CNS clock - =
advises=20
    air/back gas breaks - advises deep stops - user controls when to =
change=20
    gasses and personal safety factor settings - gives time, date, temp, =
ascent=20
    rate, feet or metric - has a back light - dive profile downloads to =
computer=20
    - can be used to generate next dive profiles/dive plans using =
history of=20
    previous dives - completely upgradeable - built like a nuclear=20
    bunker.</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2>Use it on all dives. But still keep =
slate and=20
    D/timer in pocket.</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2>Regards</FONT></DIV>
    <BLOCKQUOTE=20
    style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
      <P>IP>I think computers in general are a very good thing. Maybe =
the=20
      right one for tech diving doesn't exist yet, but if it did it =
would beat=20
      working from tables any day.=20
      <P>I believe computers have their place in no deco stop =
diving.  The=20
      procedure for recovering from a computer failure on a no stop dive =
is=20
      pretty simple:</P>
      <P>1. Go do a safety stop.  If you don't have a time =
reference, use=20
      air pressure as a guide.</P>
      <P>2. Get out of the water.</P>
      <P>3. Either get yourself straightened out on the tables or stop =
diving=20
      until you are off the tables.</P>
      <P> </P>
      <P>A computer failure on a deco stop dive isn't nearly that easy =
in that=20
      vital information about your deco obligation went away with the=20
      computer.  Perhaps one day there will be a computer with an=20
      independent, redundant system that can fix this properly.  =
There are=20
      other issues as well.<BR><BR>IP>Anyway, I just purchased =
DecoPlan. I=20
      ran the profile of my last dive (145' for 30 mins on 24% EAN, deco =
on 50%)=20
      and using the default gradient factor settings it gave about the =
same=20
      total dive time as the Nitek 3, but with a very different set of=20
      stops.<BR></P>
      <P>That's one of the other issues.  For instance, can you =
program for=20
      Pyle or WKPP stops?  I expect functions like that to hit the =
diving=20
      computers eventually.  Perhaps one that takes a PROM of some =
sort=20
      will come along.</P>
      <P><BR>IP>One thing I particularly like about the Nitek is that =
with=20
      the PC logging program it will calculate my SAC, which for me at =
this=20
      stage is useful to know across a series of different real =
dives.</P>
      <P>The logging is one of the great functions of the =
computers.  In=20
      addition to being a backup for your own paperwork, it becomes a =
"black=20
      box" for diving accidents.  My Oceanic keeps data on =
what I have=20
      been up to over the last few dives.</P>
      <P>IP> Anyone know if its possible to get it to do this in =
gauge=20
      mode (i.e. it doesn't know about gas switches, so can these be =
input later=20
      for SAC calculations)?<BR><BR>Do the people who make =
your Nitek have=20
      a website?</P>
      <P>IP>And a question on DecoPlan. The help says that the gas=20
      requirement calculation includes the reserve, but in non-metric =
mode the=20
      reserve settings in the preferences are ignored. So is the reserve =
an=20
      extra 50%?<BR><BR>IP>Anyone know if the gas management features =
that=20
      are only available in metric mode are going to be implemented in=20
      non-metric at any time in the near=20
future?</P></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTM
L>

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