Knowing how much gas is in your cylinder is an important part of the dive planning process. You’ll use this along with your SAC rate (surface air consumption rate) in order to find out if you have enough gas in your cylinder to safely get back to the surface, taking into account a third reserve.
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Bar? WTF? im in the USA… Go eat some spotted dick!!!!
Good video. Thank you. You just have to remember that 1 bar is not exactly = to 1 atm, to make sure the volume in liters are correct divide your number by 1.01325. In you example 12L x 230bar/1.01325=2723 L not 2760L.
Thank
BAR is so confusing when I've always been using psi and cubic feet
I would take working volume ÷ working pressure = baseline
baseline × psi in tank = volume in tank
example ~
100 cubic foot tank (when filled to working capacity) with a rated pressure of 3,500
100 ÷ 3,500 =.0285
.0285 × 2,500psi = 71.25cuft
this is helpful in knowing how much volume one consume at depth
an air consumption of 1cuft/min on the surface is 4 cuft/min at 99ft
71.25cuft ÷ 4cuft/min = 17.81 minutes of air at 99ft
or…
If you would be at 99ft for 25 minutes, 25min × 4cuft/min = 100cuft consumed at 99ft