VPM on VR3 VS. VPM on V-Planner

Mephisto26

Hey there,

Can somebody please compare the VR3/VPM profiles with V-Planner profiles???

How close are they or what conserv. I have to enter in V-Planner to get close...???

THX
Patrick

diverklondike

Patrick,

I think you will find several existing threads on this one...

Regardless the net is that if you set VPM-B/E with B and E selected with a +3 on conservation it should match with the VR-3 with VPM.

Dive Safe...

Mark

Mephisto26

Thanks for your reply Mark...

Un/Fortunately I spend most of my day in the water and have not so much time or energy in the evening to spend it in front of the PC so please forgive me if every once in a while I ask something that has been asked already...

So if I understand correctly, the VR3 is like the V-Planner (VPM-B/E) with Conservatism on +3?

Is this true regardless of the profile? shallow short vs. deep long?

Thanks again for your help...

Patrick

diverklondike

As long as it's a VR-3 with VPM it should match reasonably close.

PCDiver

Forget it. The pre 2007 VPM-B implementation on the VR3 produced way more deco compared to V-Planner. The VR3 version was a combination of VPM-B (deeper stops) combined with padded shallow stops. You typically have to do 30-40% MORE deco compared to buhlman. I stopped using it and set my VR3 to buhlman these days.

I'm thinking about upgrading to latest version but primarily for the new "bailout" profile.

diverklondike

The VR-3 uses a VPM-B/E implimentation and not just VPM-B There are a number of threads out there with comparisions that prove it out. They also go into the fact that you need to hug the ceiling to prevent the VR-3 from adding additional deco during the accent.

If I have time later today I will dig out some of the posts and comparisions.


M

rossh

Not true..... sorry. The real VPM-B/E is in V-Planner only and now in V-Planner Live. It would seem that the VR3 has tried to emulate the B/E variant in a simplified fashion. My own checks with the comparisons is that sometimes the VR3 is close to the real B/E, and other times it's way off.

Regards

__________________
Regards, Ross Hemingway

www.v-planner.com

Andy Del

I would go so far as to think that for Delta-p to say they use VPM, or these days VPMB+E is sailing very close to the wind with false advertising.

With the way dive computers are going, the old 'take it or leave it' attitude they display is pretty easy to beat. There appears to be at least two viable options, and at least 5 different manufacturers.

As I use a VR$ with VPM I have three choices:

1. Dive VR$ in buhlmann. I get niggly elbows and knees, so have to modify the deco schedule on the fly.

2. Dive the VR$ in 'VPM'. Stay in water for ever. Feel fine, until I experience the ire of other divers and driver on boat.

3. Carry a VR$ for show and dive tables, (VPMB +2) get out of the water on time and feel fine.

That is, until the postman can manage to get his pony up to my front gate with my new toy...

__________________
Yellow - the colour of greatness!

Peter Piemonte

Agree with Andy. I no longer run my VR3 in VPM. I leave it in Buhlman. I have not had too many problems with that deco schedule unless I am doing cold water, repetitive deco dives. I then modify the schedule as Andy does.

In comparing the generated profiles at my desk, V-Planner vs. the VR3 in VPM mode, they are fairly close with the V-Planner set to +3. In practice, it is a different story.

I like the color screen, gas changing ability and PO2 monitoring of the VR3 and I hate the VPM mode.
Regards, Peter

mbelair

I'll second that. Even when you hug the ceiling, you just cannot plan your dives on V-Planner and expect to follow a similar profile on the VR-3 once in the water. Your gas calculations end up being way off because the VR-3 just keeps you under water for ever...

It seems to work in plan mode but not in real life.

At least, it never worked for my buddies or myself.

Diving the X-1 with V-Planner is a different and impressive story.

__________________
Marc