If a diver dives too deeply too fast, what immediate action should they consider?

Ascending to a shallower depth is the recommended immediate action if a diver descends too deeply too quickly. Rapid changes in depth can lead to various forms of pressure-related injuries, such as barotrauma or decompression sickness. By ascending slowly to a shallower depth, the diver allows their body to adjust to decreasing pressure gradually, which helps to minimize the risk of these conditions.

While equalizing pressure is important, especially during descent, it is primarily the concern at shallower depths when descending rather than an immediate response to depth-related issues arising from a rapid descent. Consulting the dive computer is certainly useful for monitoring depth and time limits but does not directly address the immediate danger from rapid ascent. Taking a safety stop is a critical safety measure during ascent, particularly after deeper dives or when near the surface, but it is not an immediate response required in the context of having descended too deeply too quickly.