Which method helps prevent decompression sickness?

Ascending slowly and adhering to safety stops is the correct method to help prevent decompression sickness. This practice allows for the gradual release of dissolved gases, primarily nitrogen, from the body as a diver ascends. When divers are at depth, the pressure increases, allowing more nitrogen to dissolve in body tissues. If a diver ascends too quickly, nitrogen that has accumulated in the tissues can come out of solution too rapidly, leading to the formation of bubbles. These bubbles can cause a range of symptoms associated with decompression sickness, including joint pain, dizziness, and in severe cases, can be life-threatening.

By ascending slowly and incorporating safety stops, typically at 5 meters (15 feet) for several minutes, divers give their bodies time to adjust, allowing gas to escape safely, which significantly reduces the risk of developing decompression sickness. This practice is a fundamental safety measure in recreational diving and is emphasized in diving training and guidelines to ensure divers can return to the surface safely after their dives.