What is hydrostatic pressure?

Hydrostatic pressure refers specifically to the pressure exerted by a fluid at rest, which is primarily influenced by the depth of the fluid and the density of the fluid. In the context of water, as a diver descends, the weight of the water above them increases, creating greater pressure on their body and any submerged objects. This pressure can be calculated using the formula: Pressure = density × gravity × depth. Thus, the deeper you go in the water, the greater the hydrostatic pressure you experience.

Understanding hydrostatic pressure is crucial for divers because it affects buoyancy, gas absorption, and the overall physical sensations experienced underwater. Recognizing how this pressure works helps ensure safe diving practices and aids in knowledge regarding dive tables and decompression processes. The other options describe different types of pressure but do not accurately define hydrostatic pressure as related to fluids in a state of rest, making the selected answer the most appropriate.