In an out-of-air emergency, what is an independent action a diver can take?

In an out-of-air emergency, a controlled swimming ascent is a critical independent action that a diver can take. This method allows the diver to begin their ascent to the surface safely and efficiently, taking control of their own situation. By performing a controlled ascent, the diver can manage their buoyancy and prevent rapid ascents that could lead to decompression sickness or barotrauma.

The process involves stopping at safety stops if necessary, and using proper buoyancy control techniques to ascend at a safe rate, typically not faster than 30 feet per minute. This independent action emphasizes the diver's ability to respond effectively to their circumstances without relying on another diver for air, making it an essential skill taught during dive training.

In contrast, actions like using an alternate air source or sharing air with a buddy typically depend on the availability and cooperation of another diver, which is not always guaranteed in an emergency scenario. Therefore, the focus on a controlled ascent empowers the diver, promoting self-reliance while ensuring safety during potentially life-threatening situations.