What is a "decompression stop"?

A decompression stop is a crucial safety procedure undertaken during the ascent phase of a dive, particularly after deep dives or prolonged dives. It involves pausing at a specified depth to allow nitrogen that has been absorbed into the body's tissues while diving to be safely released.

When divers are submerged, the increased pressure causes nitrogen from the air we breathe to dissolve into the body. If a diver ascends too quickly, the rapid decrease in pressure can lead to nitrogen forming bubbles in the tissues and bloodstream, potentially causing decompression sickness, also known as "the bends." By taking a decompression stop, divers mitigate this risk, allowing for a gradual release of nitrogen, promoting safety and preventing potential health complications associated with rapid ascent.

Equipment checks, resurfacing for air, or pausing solely for observation do not address the physiological effects of nitrogen absorption and release. Understanding the importance of decompression stops is vital for maintaining safety during scuba diving.