suunto-RGBM is not RGBM but modified Haldaenian, just like Buhlmann????

[supervisor]

Hi all,

I heard/read something about the suunto-RGBM not being real RGBM, but just modified haldaenian topped with RGBM data.

is this true?

can anyone provide url's or other infos about this feature?

I am in the process of buying a new nitrox computer and I am having real difficulties in choosing between the vyper (RGBM?) and the smart pro (buhlmann!).

I heard that the buhlmann algorithm is outdated (variable ascent speed seems to be outdated) and that RGBM is newer and safer (because of static ascent speed on alle depths with added deep stops).

anyone can convince me buying the smart pro or the vyper?
(personal experiences are also appreciated)

Thanks in advance!!!!

 

[Diver0001]

Hi all,

I heard/read something about the suunto-RGBM not being real RGBM, but just modified haldaenian topped with RGBM data.

is this true?

Yes. This is true but the RGBM layer they wrapped around it is still an improvement over the basic model.

R..

 

[Saturation]

I wouldn't base my decision on RGBM or the Smartpro's microbubble reduction technology.

Vypers, last I saw, do not use real RGBM. That is certain, you can find Dr. Wienke or my post about it somewhere on this board and others. It does use some RGBM elements, but the main algorithm is Haldaninan. You can dive the computer in simulation mode and see what it does, true RGBM will give you credit for a deep stop or add such stops to your ascent profile.

Smartpro uses a novel algorithm to reduce microbubbles, but you'd better read up on it to see what your extra costs get you. A NSL dive of 100' for 16min with the max algorithm turned on give something like a 40min ascent time, for what the Buhlmann requires as a 9 min ascent time [ie., stop + 30fpm ascent]. Its possible this algorithm indeed does reduce microbubbles, but its practically useless in recreational diving at that setting, its best done with technical training under full decompression, thus reducing this time to 7-13 minutes or less.

http://www.uwatec.com/imperial/framem08_t.htm

 

[Foo]

sigh.... I'll be soooooooooo glad when I finally learn how to speak "Scubish". This line, "suunto-RGBM is not RGBM but modified Haldaenian, just like Buhlmann????" is enough to make any newbie's knees knock. ) I'll keep reading and working with you fine interpreters until I learn...
Foo

 

[Genesis]

Those selling meters (and software) are responsible for the marketing-speak, unfortunately.

I don't see it changing any time soon. After all, folks with products like to sell them.....

 

[Foo]

Genesis, thanks- I was just kidding because so many things have seemed like a foreign language since i started investigating diving. For my ignorant eyes, this sentence was... well- fun. Like a foreign language. Sorry if I bumped into an area where I don't belong- yet. )
Foo

 

[chrisch]

From personal experience I can say the Suunto is great for standard recreational profiles. However, it is not true RGBM and may be a bit weaker for deep (130fsw+) dives, but it has gauge mode for deep stuff to use with tables from your preferred software.
If you do lots of deep stuff something else may be better, but I cannot give you real world feedback on that - sorry.
Chris

 

[letoktok]

i would have to say been diving with suunto for a while, they are great have limitations. I would have to say they are on the concervative side. But they do have the mandatory stops and the recomended deep stop. The computer won't penalize you if you decide to ignor the recommended stop but won't realy appreciat it if you do so with a mandatory one!
I don't know anything about the smart pro. scuba diving mag's "gear guide" doesn't really say to go either way. It has to be personal prefs, the nice thing with suunto you can change your modes and prefs so you can make it even more conservative. That's my take hope was a bit helpful, i go with suunto.

 

[paolov]

i agree with letoktok , however i use SUUNTO (on feet) a redundant aqualand dive watch (on metric for alarm, depth and time) not for nitro loading.

However i use the aqualand for deep dives around 150Ft. and use paper and pencil to do my dive plan instead of relying on the computer as this changes the requirements on time demands. better to do it the long way and consult charts.

I think deep stops are great after reading on the time it takes blood to circulate around the body and taking GUE-WKPP theory , i think i have better dives after incorporating deep stops into our dives.

i would have to say been diving with suunto for a while, they are great have limitations. I would have to say they are on the concervative side. But they do have the mandatory stops and the recomended deep stop. The computer won't penalize you if you decide to ignor the recommended stop but won't realy appreciat it if you do so with a mandatory one!
I don't know anything about the smart pro. scuba diving mag's "gear guide" doesn't really say to go either way. It has to be personal prefs, the nice thing with suunto you can change your modes and prefs so you can make it even more conservative. That's my take hope was a bit helpful, i go with suunto.

 

[Dr Deco]

Hello Scuba Board Readers:

Meters and Such

At NASA, we do not do much scuba diving other than in the Neutral Buoyancy Laboratory and that is only to a depth of 40 feet on nitrox. Since meters are not a part of our world, I have really very little personal acquaintance with them.

Many have asked questions over the past few years, and have expressed their frustrations with the inability to determine what goes into these devices. Unlike PADI/DSAT, no manufacturer has seen fit to publish any real information about the algorithm or its testing.

Many claims are made for such things as a “reduction in microbubbles.” I am not aware of any real test program that demonstrated that.

I suspect that a great deal of what is out there in terms of information is simply the manufacturer’s advertising. I see little in terms of real science. I believe that we all are frustrated.

Dr Deco :doctor: