What is the ambient pressure on a diver at 92ft / 28m of salt water?

To determine the ambient pressure on a diver at 92 feet (28 meters) of salt water, it's important to understand how pressure increases with depth in a fluid such as water.

At sea level, atmospheric pressure is approximately 1 atmosphere (ata). For every 33 feet (10 meters) of salt water, the pressure increases by about 1 additional atmosphere due to the weight of the water above.

At 28 meters, we can calculate the pressure as follows:

• The atmospheric pressure at the surface is 1 ata.

• The depth of 28 meters is equivalent to approximately 3 atmospheres (since 28 meters is slightly less than 30 meters, which would correspond closely to 3 ata).

This gives us a total of:

1 ata (surface pressure) + 2 ata (pressure from the water: 28 m is less than but close to 30 m where it would be perfectly 3 ata) = approximately 3 ata.

However, at 92 feet, which is slightly greater than 28 m, the increase in pressure due to water depth contributes to the calculation. Since 92 feet is a little more, the final pressure can be approximated at about 3.8 ata, which