Real time SAC? How? (Ridiculous SAC)

[estresao]

What no-one seems to have commented is that using doubles will always make you have a higher SAC due to extra drag of the tanks the way they are no longer as streamlined and the extra regs. If you are also using a drysuit, then more drag and additional use of air to fill suit, especially if as per the profile you go up a bit and dump air and then down and add more.

Personally, my SAC goes from 10-10.5 on a single in a wetsuit to 12.5 using a single and pony and extra bits on a 40+m dive to 13.5 when using a drysuit on the same deep dive.

Agree with you, but I'm having huge consumption even wearing single mount and wet suit. I understand dry suit plus doubles will lead me to eat more gas, but the concern is that I've increased even wearing single and wet.

 

[estresao]

Subsurface is incorporating real gas law into their equations. They are not calculating using the Ideal gas law. Thus come up with different, but more precise numbers.

See: When real gas corrections matter – The Theoretical Diver

Very good point, that explains everything. Thanks!