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Gas Usage
Using less gas means smaller tanks in practical terms. The Inspiration CCR
is standard fitted with 2 x 3 litre tanks; one tank with air (or other
diluents) and one tank with oxygen. If we say that your body’s oxygen
metabolism consumes 1 litre of oxygen per minute, the three litres of oxygen
at 200 bars will support your body for approximately 10 hours. The diluent
is used on descends to maintain volume in the loop (like your dry suit). The
diluent is normally used for buoyancy as well supplying your wing or suit.
Normally an experienced CCR diver will use 30-40 bars of diluent on a dive.
If you compare open circuit nitrox to CCR diving, you will avoid the need to
predetermine the depth before the dive trip. Even if you have to change
plans to a wreck on a different depth, you will still have the optimal gas
at your disposal – it will constantly be mixed during the dive.
Diagrame showing gas usage |
