Which factor can be critical for avoiding injury related to pressure changes?

Properly equalizing air spaces is crucial for avoiding injury related to pressure changes during diving. When a diver descends or ascends, the surrounding water pressure changes, which can cause discomfort or harm if the pressure inside air spaces in the body—such as the ears, sinuses, or lungs—does not equalize with the external environment.

Equalization techniques, such as the Valsalva maneuver or Toynbee maneuver, help balance the pressure inside these spaces with the ambient pressure. If equalization does not occur, divers can experience barotrauma, which can injure delicate tissues. Therefore, understanding and applying proper equalization methods is essential for maintaining safety and comfort underwater.

In contrast, while a thick wetsuit can provide thermal protection, it does not directly address pressure-related injuries. Similarly, a slow and steady ascent is important for preventing decompression sickness but does not focus on equalizing the pressure in air spaces. A digital dive computer is a useful tool for tracking depth and ascent rates but does not affect the ability to equalize pressure internally.