Norman

I refer to VR3s as wrist weights.  If you prefer to spend your dive time
doing deco rather than on the wreck, then the VR3 is the dive computer for
you.

On a recent shallow dive it required 15 minutes more deco than an Oceanic
computer.  On the routine Trimix dives we do I expect it to require twice the
deco I do.  Time will tell.

David Shimell
shimell@se*.co* <mailto:shimell@se*.co*> 
DDI: 01932 814096 * Mobile: 07770 282 202 * Fax: 01932 814343
Project Manager, IBM UK Web Server Group, Sequent Computer Systems Ltd,
Weybridge Business Park, Addlestone Road, Weybridge, Surrey, KT15 2UF, UK
registered in England and Wales under company number: 1999363, registered
office as above

-----Original Message-----
From:	Norman Woods [SMTP:normanwoods@no*.fr*.co*.uk*]
Sent:	Sunday, June 11, 2000 5:11 PM
To:	Don Burke; Ian Puleston
Cc:	techdiver@aquanaut.com
Subject:	VR3

Hi Ian
    The VR 3  http:// www.vr3.co.uk/ <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
Norman
---------------------------------------------------------------
Norman Woods
Coleraine N Ireland
normanwoods@no*.fr*.co*.uk*
<mailto:normanwoods@no*.fr*.co*.uk*> 
www.norglen.freeserve.co.uk <http://www.norglen.freeserve.co.uk> 

	 

	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. 

	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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