Calculating Air Tank In Scuba Diving


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Scuba divers should know air, air tank, and consumption of breath, and under pressure. If you are a beginner of scuba diving, you should focus on techniques and methods of perfect scuba diving. As a beginner, never get into the air tank and pressure. You can plan your own scuba diving experience after the practice of 2 to 3 years of scuba. Then learn about calculating air tank and surface air consumption. 

Calculating Air Tank In Scuba Diving
Calculating Air Tank In Scuba Diving

Why It Is Important: Calculating Air Tank

Scuba divers who are experts love to spend more time underwater, and they explore the underwater caves and dive deep into the water. Sometimes, they may forget to focus on air tanks and pressure as they are enjoying the beauty of sea and adventure of caves. In such conditions, many scuba divers make the mistake of not considering the time to return. They face problems in returning as there is no more life gas in the air tank. Calculating the air tank is the better option than stuck into the harsh conditions.

Calculating Air Tank: Surface Air Consumption

Learn to calculate the surface air consumption so that you have the idea of air consumption according to the depth of the dive. Surface air consumption is the equation of air consumption and intensity of dive. As you dive deeper, pressure increases, and hence the density of air increases, but it decreases the volume of the air you breathe. As a result, you will consume more air as you dive deeper. The manometer can not describe the whole method, and it will show you numbers only. You have to decide according to your knowledge and estimation of air consumption. 

Calculating Air Tank: Measuring

Initially, do some experimental dive in different conditions and depth. Record the state of the beginning and endpoint of diving. You should record time, depth, gas, cylinder size, and air consumption. Include the dive of harsh efforts because of currents. Mainly include the dive where you swim for 5 to 10 minutes and measure the air consumption from 5 to 10 minutes of swimming. 

Math Calculation:

There is a number of online platforms available to do calculations of diving activities. But I recommend doing some necessary diving calculation on your own because underwater pressure will not allow accessing online platforms. 

Maths Equation:

VT x VC / T / P = SAC

VT= Total volume of the cylinder (in liters)

VC= Consumed volume during dive in bars

T= Duration or time of the dive

P= Pressure of average dive depth (in bars)

SAC= Surface Air Consumption

VT = 15 liters

VC = 50 bars

T = 20 minutes

P = 3 (20 meters of water equals 3 bars of pressure)

So, 15 x 50 / 20 / 3 = 12.5 ( l per minute)

Calculating Air Tank In Scuba Diving
Calculating Air Tank In Scuba Diving

Some more examples:

1. A dive of 40 minutes to 25 meters: 12.5 x 40 x 3.5 = 1969 liters of air approx.

2. A dive of 60 hour to 10 meters: 12.5x 2 x 60 = 1500 liters of air

3. A dive of 35 minutes to 35 meters: 12.5 x 35 x 4.5 = 1687.5 liters of air approx. 

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