At what depth is one atmosphere of water experienced?

One atmosphere of pressure is experienced at a depth of 33 feet (10 meters) of seawater. This is derived from the understanding that for every 10 meters (or approximately 33 feet) of seawater, the pressure increases by one atmosphere due to the weight of the water above. This concept is essential in diving since divers must be aware of how pressure changes affect their bodies and their equipment.

As you descend underwater, the combination of atmospheric pressure and the pressure exerted by the water column above you increases. At sea level, you experience one atmosphere of pressure from the air surrounding you. When you go down to a depth of 33 feet, you add another atmosphere from the seawater, resulting in a total pressure of two atmospheres. This foundational knowledge is crucial for safe diving practices, including understanding the impacts on buoyancy, breathing gas expansion, and potential risks like decompression sickness.