At which depth would you expect to experience a different atmospheric pressure compared to sea level?

Atmospheric pressure increases with depth when diving because each additional layer of water above exerts more pressure due to the weight of the water. At sea level, the standard atmospheric pressure is approximately 14.7 pounds per square inch (psi) or 1 atmosphere (atm). As you descend, the pressure increases by approximately 0.4 psi for every foot of seawater.

At 10 feet, the pressure would be about 1.3 atmospheres (14.7 psi + 10 feet x 0.4 psi). At 20 feet, it would be around 1.7 atmospheres (14.7 psi + 20 feet x 0.4 psi), and at 30 feet, the pressure would be about 2.1 atmospheres (14.7 psi + 30 feet x 0.4 psi).

Since each of these depths represents a situation in which the divers would experience a greater atmospheric pressure than at sea level, it is correct to say that at all these depths, the atmospheric pressure is indeed different from that at sea level. Thus, recognizing that pressure changes occur from the surface to various depths is crucial for understanding the effects on the body and for planning safe diving practices.