What is the relationship between water pressure and dive depth?

The relationship between water pressure and dive depth is based on the principles of hydrostatic pressure. As a diver descends in water, the weight of the water above exerts pressure on their body. This increase in pressure is significant because it affects various physiological and operational aspects of diving.

For every 10 meters of depth in seawater, the pressure increases by approximately one atmosphere (atm), which is equivalent to about 14.7 pounds per square inch (psi) at sea level. This means that at a depth of 10 meters, the pressure experienced would be around 2 atm (1 atm from the surface plus 1 atm due to the water column). At 20 meters, it would be around 3 atm, and so on. Understanding this linear relationship is crucial for divers, as it influences factors such as gas absorption, buoyancy, and the risk of decompression sickness.

By recognizing this relationship, divers can better prepare for their dives, monitor their ascent rates, and apply safe diving practices to mitigate the risks associated with increased pressure.