How to calculate SAC rate?

[tndiveinstruct1]

But, it seems that from a decompression modeling point of view, it would not matter if you left the computer in saltwater mode & dove in freshwater or vice versa. The computer is simply measuring ambient pressure. Obviously if you do not make the switch, the computer will display a depth that will be off by about a ft/atm, but the decompression modeling will be the same....as we're starting to discuss in the other thread.

Jim

The computer would simply be off if you neglected to change it from one to the other, but I suspect that in altitude diving that it does make a difference. It certainly would make a difference in the SAC, which if I recall was the original topic of discussion on this thread.

Randy

 

[ozzydamo]

I get it. You meant expressing consumption in psi is tank-dependent.

I really like the way you label and refer to tanks by their interior volume at 1 bar. (Have I got that right?) I saw that in the seychelles, diving off a French boat. And you're right, it makes the calculations a lot easier and less error-prone. I imagine that, in metric countries, most divers skip a "bars per minute" step and work with liters/minute right from the start. Very cool.

Bryan

Metric= 1 litre of water equals a kilo

The bar is defined using the SI unit pascal, namely: 1 bar ≡ 100,000 Pa. 1 bar is therefore equal to:

• 14.5038 psi

With most new heavy plant and engineering equipment now built in Germany, you guys will be converting to this system soon enough, we converted in 1972 in Australia

 

[Garrobo]

I get my sacks from Walmart at about eight sacks a week.