What is the absolute pressure at 33 feet in sea water expressed in atmospheres?

To determine the absolute pressure at 33 feet underwater in sea water, it is important to understand the relationship between depth and pressure.

In sea water, pressure increases by approximately one atmosphere (ATA) for every 33 feet of depth. At sea level, the pressure is defined as 1 ATA. Therefore, when you descend to 33 feet, you experience the additional pressure due to the column of water above you.

This means that at 33 feet, the pressure exerted by the water column adds 1 ATA to the pressure already existing at sea level. Hence, the total absolute pressure becomes 1 ATA (from the atmosphere at sea level) plus 1 ATA (from the water column at 33 feet), resulting in a total of 2 ATA.

However, it's critical to recognize that when asked for the absolute pressure at this depth, it should not only account for the pressure contributed by the water but should also include the atmospheric pressure that exists before submersion.

At 33 feet, your absolute pressure measurement should encompass both: 1 ATA from the atmosphere at the surface and 1 ATA for the first 33 feet of water. Thus, the total pressure experienced at this depth is 2 ATA.