If you go too deep or stay too long while diving, what may happen if you attempt to ascend directly to the surface?

Ascending directly to the surface after diving too deep or staying too long poses a significant risk of decompression sickness due to the pressure changes experienced in the water. When divers are at greater depths, the partial pressure of nitrogen in their bodies increases because of the surrounding water pressure. If a diver ascends too quickly, the nitrogen that has been absorbed in the tissues can form bubbles as the pressure decreases. These bubbles can lead to decompression sickness, a serious condition that can cause various symptoms, including joint pain, dizziness, paralysis, or even death.

A controlled ascent is crucial to allow the body time to safely release nitrogen. Following established guidelines for ascent rates and incorporating safety stops can significantly reduce the risk of decompression sickness, protecting the diver's health. Understanding this principle is essential for safe diving practices.