encoreplus2
Registered
*Floater*:2. The metric tank sizes are still a little foreign to me. For example, an 80 cu.ft. tank gets converted to a 2265 L tank (metric), even though most people would call it an 11 L tank (I think based on how many L of water it holds). Also, the program seems to require a working pressure for tanks even in metric format even though this is not necessary and the calculations I've seen for metric SAC rates have not used it
My european testimony: cylinders are mainly refered to by two figures : tank size, thats is to say inside volume (liters=cubic decimeters) and working pressure (bars=10 megaPascal).
Multiplying inside volume by working pressure will give us the surface equivalent air volume expressed in cubic meters (eg 2.2 cubic meters instead of 2265 liters) . But this is not the usual way to describe one's tank.
Typical values are ranging from 10L*200B to 12 L*230 B for leisure divers
Dive marshalls will use 15L*230 B or smaller twinned tanks.
I do agree with floater about SAC.
When it comes to computing SAC one needs to know its water capacity, pressure in, pressure out and dive parameters.
That's the way I've been taught and the way I teach now.
The working pressure is about how much I could have taken with me.
That is irrelevant. I just need to now how much I did really bring.
http://www.scijournals.org/misc/conversion.shtml
http://www.hoptechno.com/nightcrew/sante7000/convert.cfm