What does the term “decompression dive” mean?

The term “decompression dive” refers specifically to a dive that involves a planned ascent, which includes one or more stops to allow the body to safely eliminate excess nitrogen absorbed during the dive. When divers go deeper and stay underwater longer, they absorb more nitrogen. As divers ascend too quickly, nitrogen bubbles may form in their tissues and bloodstream, potentially leading to decompression sickness, commonly called "the bends." Therefore, making safety stops during ascent is crucial to mitigate the risk of this condition.

While a dive that does not require a safety stop, one that occurs at great depths, or a dive conducted in cold water may be relevant characteristics of certain dives, they do not specifically define the concept of a decompression dive. A safety stop might not be required after shallower dives, and great depths alone do not determine whether a dive is deemed a decompression dive; rather, it’s the dive profile and time spent at depth that matter. Similarly, water temperature does not influence the definition of a decompression dive. The essence of a decompression dive lies in the necessity of making safety stops to ensure safe ascent after experiencing increased inert gas absorption at depth.