Dive Planning and Computers Vs. Tables

[SubMariner]

"I understand the computer credit and all, but were the tables not created with the expectation that you would be descending and ascending?"

The "flat" tables allow for one descent and one ascent; you calculate your bottom time from the moment you start to DESCEND to the moment you start to ASCEND. How would you go about caculating it any other way on that type of dive table? As I mentioned previously, the only manual device that comes close to emulating a dive computer in calculating muli-level dives is the PADI Wheel. Have you seen one? They look quite different from the regular dive table.


"And if the tech divers do not use a computer, why is that different for rec divers? The nitrogen intake or oxygen partial is the same, does'nt matter if you are 60' in the cave or on the reef. "

What gave you the idea that tec divers don't use a computer? All the ones I know certainly do!

~SubMariner~

 

[tombiowami]

Has anyone read this DCS story?

http://www.scubaboard.com/showthread.php?threadid=3128

My follow up question is, if a computer can be that off on the no fly, how do we know it would not be that off on other info? 3 hours sounds ridiculous, naui says a good 24 hours before any flight.

Tommy

 

[blacknet]

Hello,

That is why you use a computer as a logging/monitoring tool ONLY.

Ed

 

[Liquid]

Using a computer just as a monitory device is a waste of a good and important tool. Computers are usualy suposed to be safer than tabeles, becouse they are using therotical models on reall time. Some computers rely on the tables, and just calculate them on reall time (sort of like a wheel), while other have their own completly different models. The suunto newer computers, use a new kind of models called RGBM, that is safer than what is used by most computers and tables. Newer computer also alow for things that are traditionaly not acceptable, such as reverse profiles, becouse they are reall-time.

Whe diving technical dives, the breathed gas is usualy not air, but other gass- from EAN to trimix to heliox. On these cases, ofcourse, a recreational computer is useless, and can be used as a gauge only. There are several computers for tech diving, but as tech dives are dives that are preplanned to the last detail, It's not such a big tool there as in recreational diving.

Accidents also happen when using dive tables. You are never 100% safe, no matter what precoutions you take, so just write down the number for the closest HBO on a slate and go dive. Computer or table.