Air consumption rate is the amount of air used per minute on land.
When the air consumption rate increases, the tank air is consumed in a short time.

*When the water temperature is low, the air consumption rate increases.

*People with larger lungs have higher air consumption rates than smaller ones.

*When the amount of exercise is high, the air consumption rate increases.

*People with anxiety have higher air consumption than people without anxiety.


*People with less diving experience have higher air consumption than those with more diving experience.

The air consumption ratio can be obtained by the following calculation.
The unit of volume is liter, the unit of pressure is atm pressure and the unit of time is minute.

1．Start pressure - End pressure = Consumption pressure

2．Consumption pressure x Tank capacity = Amount of consumption

3．Amount of consumption ÷ Time = air consumption ratio

◆◇◆ Question ◆◇◆

I equipped a 12-liter tank filled with 200 atm and swam the surface water at a constant pace for 10 minutes. After swimming, the remaining pressure in the tank was 175 atm.
How much is the air consumption ratio in this case?

◆◇◆ Answer ◆◇◆

The air consumption ratio is 30 liters / minute. Calculate with the above formula as below.

1．200 atm (Start pressure)-175 atm (End pressure) = 25 atm (Consumption pressure)
2．25 atm (Consumption pressure) x 12 liters (Tank volume) = 300 liters (Amount of consumption)
3．300 liters (Amount of consumption) ÷ 10 minutes (Time) = 30 liters / minute (Air consumption ratio)