Suunto Cobra Nitrox Settings

[813Diver]

In the manual of my Suunto Cobra it specifically says to round decimals DOWN when setting the FO2 in nitrox mode. In my TDI class, I was taught to round UP when figuring the number.

I can see the benefits/drawbacks to doing both, but what do you all do?

 

[norcaldiver]

I play 2nd grade and round to the nearest. 31.8=32 and 36.2=36, but I never push it that close to the limits where .4 will make a difference.