VR3 no stop times

[Twinsetmad]

I dived with a buddy in Scapa last year using a Vytec..against my VR3..

I to found that at the begining of the week I was doing much more deco than him... but after a few consecutive days diving the roles were reversed. My VR3 was clearing much quicker than the Vytec by the end of the week. The apple and banana comparison is very good. They are both similar but very different. Its looked after me well through the years and I wouldn't be without it no stop or deco.

[Mark Chase]

Originally Posted by wagger

Thanks for that sensible reply! I did get the vytec for the gas switching it gives, but never was that happy with it. Just with going from oc to ccr I am looking at clearing out a lot of the kit I seem to have ended up with. Just going to keep a basic set of oc gear for club teaching with. Twinset and wings up for sale soonest!

The Vytec controls your ascent rate instead of doing deeper stops. So I beleive it doesent actualy show a stop or deco but it is slowing down your ascent rate as you go. The VR3 allows for a faster ascent but inputs stops as it goes. The VR3 is renowned for bending people but i find this claim incredible as its one of the most Conservative dive computers i have ever owned. I have run dives up to 3 1/2 hours to depths of 105m and all on 0 safety on the VR3. Typically Id do 45mins at 60m 2 1/2 hour run on the VR3 often two or three days in a row.

Most people who actually use a VR3 complain its too conservative.

20/80GF is about right if you want to find the in water time for a VR3 deco profile.


You should also notice that once you go multi gas that the VR3 times and the Vytec times start to match pretty close. However with the vytec you have to be at their desired stop depth or it will continue to rack deco.

I messed about with it all for a while but my conclusion was switch the Vytec on to gage mode and stop using it. Cut tables or run DOTF for your deco as a back up to the VR3 Then just follow the VR3.


By the by I ran my Shearwater Computer on 10/85 GF and the other day we did a 50m dive. 10GF gives prety much the deepest deep stops and my first stop was at 27m the VR3 gave a first stop at 39m. Neither computer was wrong its just the way they calculated it. Both my buddy on the VR3 and me on the Shearwater got out bend free.

ATB

Mark Chase




ATB

Mark Chase

[gibbon]

Originally Posted by gibbon

You are being a muppet

In the sober light of the morning I can see that there is scope for this to be taken as not useful however it was an option that you offered as an answer and I was not in any state to write you a decent answer at the time. – Indeed I should not have posted.

I am surprised that you are so naive about how such an expensive piece of equipment works, and that you had not taken up the excellent offer of Barry Divertec Ltd - he is so confident in the VR3 that he will lend you one to trial prior to purchase.

If I were looking for a computer to use with CCR today then I think that the Shearwater, or HS Explorer would be top of the list as they can read 3 O2 cells rather than the VR3’s offering of a single cell separate to the ones used by an eCCR. Of course as you point out the VR3 is "the only computer you will ever need" as DeltaP are sure to bring out an expensive upgrade option that will bring the VR3 back to the front of the pack – I hope they are reading

You have had plenty of good explanation from others about the functionality and why the Suunto is less conservative. IMHO the VR3 without the VPM software is a very simple beast, it has compartments and it tracks the loading on those compartments and advises appropriately with look ahead against the available gases. IMHO there is some black magic in the Suunto code that keeps dive masters around the world from getting bent, a Suunto that has been used over many days will be considerably more conservative than one that has had the battery freshly replaced.

You ask if you should keep your Suunto and rely on just the VR3, to this I would say that you should not get rid of your Suunto. If you drop the VR3 it will need to be sent back to the factory, also the Suunto is a lot more friendly for use as a dive logger, and has plenty of value as a backup depth gauge and timer.

Good luck in your transition to CCR, I hope that I have not put you off asking questions, no question is a stupid one other than the one not asked.

Jon

[wagger]

Gibbon,
I am not so much being naive about how the vr3 works, I know the 2 computers are very different animals. I have dived with buddies using vr3's several times but never doing a no stop dive. March in the Red sea my buddy cleared his deco 16 mins before my vytec using the same deco mix, which proves that the vr3 is far more usable in these cases. I think I will run my vytec in guage purely for run times and the like. Im always open for advice and always will be.