At what depth is there a pressure of approximately 3.16 ATA?

The correct answer relates to the pressure experienced in water at a certain depth due to the weight of the water above. The atmospheric pressure at sea level is approximately 1 ATA (atmosphere absolute), and water exerts additional pressure with increasing depth.

To determine the depth at which the pressure reaches about 3.16 ATA, we can use the formula for calculating pressure underwater:

Total Pressure (ATA) = Atmospheric Pressure + (Depth in feet / 33 ft).

In this case, we want the total pressure to be 3.16 ATA. We start with the atmospheric pressure of 1 ATA, leading us to:

3.16 ATA - 1 ATA = 2.16 ATA.

To find the depth corresponding to the additional pressure of 2.16 ATA, we set the equation as follows:

2.16 ATA = Depth in feet / 33 ft.

Solving for depth gives us:

Depth = 2.16 ATA * 33 ft = 71.28 ft.

Since the 2.16 ATA represents the pressure added by the water column, we need to convert this addition to feet of seawater. As we recognize that for every 33 feet of water, there is an increase of approximately