What is the approximate pressure at 33 feet of seawater?

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Multiple Choice

What is the approximate pressure at 33 feet of seawater?

Explanation:
In diving, ambient pressure increases with depth, roughly one atmosphere of pressure for every 33 feet of seawater. At the surface you’re at about 1 atmosphere absolute. Traveling to 33 feet adds another atmosphere from the water, bringing the total to about 2 atmospheres absolute. So the approximate pressure at 33 feet is 2 ATA (about 29.4 psi). The other options would correspond to shallower or deeper depths: 1 ATA is surface, 3 ATA around 66 feet, and 4 ATA around 99 feet.

In diving, ambient pressure increases with depth, roughly one atmosphere of pressure for every 33 feet of seawater. At the surface you’re at about 1 atmosphere absolute. Traveling to 33 feet adds another atmosphere from the water, bringing the total to about 2 atmospheres absolute. So the approximate pressure at 33 feet is 2 ATA (about 29.4 psi). The other options would correspond to shallower or deeper depths: 1 ATA is surface, 3 ATA around 66 feet, and 4 ATA around 99 feet.

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