Charlie99
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This highlights an important difference between the Wisdom and the Cobra.I find the conservatism of the cobra comes more into play on the way up.
If you pass the recommended accent rate you will be penalized with an extra mandatory stop besides your regular safety stop. and also once you finish your safety and ascend to fast it will give more mandatory time so you will have to go back down and do time. Also if you pass your deco time you will be penalized on your safety stop with mandatory time.
The Wisdom simply tracks depth and time to calculate N2 loading. It doesn't care if you do a polaris ascent. It doesn't care if you yo-yo up and down repeatedly. It doesn't care about reverse profiles. It simply keeps track and dissolved gas. YOU are responsible for diving a good profile. YOU are responsible for adding additional conservatism if you "misbehaved" in some way.
The Cobra attempts to add appropriate conservatism for 'misbehavior'. Unfortunately, what exactly is going on is not documented or public knowledge, and it's hard to figure out sometimes what is going on.
Which type of computer is optimal depends a lot upon what sort of person you are.
If you are going to blindly follow your computer, then Suunto is definitely the better one. If you want to understand why your computer is saying what it's saying, the the Oceanic is better -- but you need to take responsibility for your profile and add conservatism when appropriate.
Charlie Allen