Density of Water
Water is a much denser medium than air. In fact, it is about 800 times denser. Because of the increased density, a diver will encounter greater resistance while moving within and throughout the underwater environment than a person on dry land. New divers are routinely advised that they should streamline themselves and their equipment, and that they should move slowly and steadily while underwater in order to avoid overexertion. The level of exertion during a dive will have a direct impact upon the diver’s rate of air consumption and level of post-dive fatigue.
While increased exertion may be the most obvious issue related to the density of water, as will be demonstrated its density also influences its other properties, and thus has a more far-reaching impact upon the diver.