What is the significance of the depth gauge in diving?

The depth gauge plays a crucial role in diving by measuring the current depth of the diver underwater. This measurement is essential for several reasons, most notably in relation to time and decompression limits. As a diver descends or ascends, their body is subjected to changes in pressure, which can significantly affect nitrogen absorption and release.

By knowing the current depth, divers can adhere to safe ascent rates and adhere to decompression schedules, which are designed to prevent decompression sickness, also known as "the bends." The depth gauge allows divers to monitor their position in the water column, ensuring they stay within safe depths and durations that correspond to their dive plans and training.

While a depth gauge does not indicate a diver's specific location, measure water temperature, or track air supply, it is fundamentally linked to safe diving practices by facilitating safe depth management throughout the dive.