Mares RGBM vs Suunto RGBM

[nv]

All,

I currently have a Mares Puck Air and would like to purchase another computer as a backup and to be wrist mounted. My primary choice is the Suunto D4i which runs on the proprietary Suunto RGBM algorithm. Anyone have experience used both mares and suunto versions of RGBM?

I like the D4i as is can become AI with transmitter, but I do not want to be diving 2 algorithms that begin to vary greatly at depth or repetitive dives.

Thanks


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[ajduplessis]

I have no experience with the Mares implementation, however I doubt that they will match. Dive Computers are very robust and reliable and I don't foresee sudden failure. I would therefore not spend $$ on another recreational device. I could rather buy a cheap bottom timer/depth gauge (casio g-shock watch ) or something similar to give you depth and time information as you ascent and abort your dive. You can even ascent without any device by monitoring/following the smallest bubble to the surface, judge the 4m (12ft) stop and stay there for 100 or so counts (seconds) and surface. If all else fail assuming your are diving within NDL, you can just surface.

 

[DCBC]

Suunto has three RGBM models that are used in their computers:

The RGBM used in the Vyper, Cobra/Cobra3, Zoop and D6;
Technical RGBM used in the HelO2 and D9; and
Fused RGBM used in the DX.

The RGBM model was developed by Dr Bruce Wienke, so I don't imagine that there is much of a difference in the Suunto/Mares versions. Perhaps one may be more conservative than the other, I'm not unsure.

 

[nv]

I have no experience with the Mares implementation, however I doubt that they will match. Dive Computers are very robust and reliable and I don't foresee sudden failure. I would therefore not spend $$ on another recreational device. I could rather buy a cheap bottom timer/depth gauge (casio g-shock watch ) or something similar to give you depth and time information as you ascent and abort your dive. You can even ascent without any device by monitoring/following the smallest bubble to the surface, judge the 4m (12ft) stop and stay there for 100 or so counts (seconds) and surface. If all else fail assuming your are diving within NDL, you can just surface.

I would like the other computer as is it wrist mounted and has freediving mode, but would like to match the algorithm, at least as close as possible.

I already dive with a g-shock for time and it works great. The two things I would like to be on my wrist are another computer and compass ---> meaning I won't have to look down.

These wrist-watch size computers are nice and compact and can be used for everyday as well.

---------- Post added July 19th, 2013 at 10:26 AM ----------

Suunto has three RGBM models that are used in their computers:

The RGBM used in the Vyper, Cobra/Cobra3, Zoop and D6;
Technical RGBM used in the HelO2 and D9; and
Fused RGBM used in the DX.

The RGBM model was developed by Dr Bruce Wienke, so I don't imagine that there is much of a difference in the Suunto/Mares versions. Perhaps one may be more conservative than the other, I'm not unsure.

Those are my assumptions as well.