How does decompression diving compare to no-decompression diving?

Decompression diving involves exposure to higher levels of inert gases, like nitrogen, at greater depths and under longer durations, which can lead to the accumulation of these gases in the body. This buildup necessitates a controlled ascent and often stops at various depths to allow the body to safely eliminate the inert gases, reducing the risk of decompression sickness. Without proper precautions, such as careful planning of dive profiles, adherence to ascent rates, and inclusion of safety stops, this can increase the risk significantly.

In contrast, no-decompression diving allows divers to ascend directly to the surface without mandatory stops, typically for shallower dives where inert gas absorption is kept at levels that do not require decompression. However, this does not mean it is devoid of risks; it just operates under a different set of parameters. The distinction lies in the precautions that must be taken in decompression diving; failing to observe these can lead to serious health hazards that might be avoided in no-decompression scenarios. This understanding helps divers assess the necessary safety protocols and training required for different types of diving activities.