What is the recommended ascent rate for divers?

The recommended ascent rate for divers is typically advised to be no faster than 9-18 meters (30-60 feet) per minute. This range is considered safe to minimize the risk of decompression sickness, which can occur if a diver ascends too quickly from depth. Ascending at this rate allows sufficient time for nitrogen absorbed into the body during the dive to safely dissipate as the pressure decreases.

While certain circumstances, like emergency situations, may necessitate a faster ascent, following the established guidelines under normal scuba diving conditions is crucial for diver safety. This rate is recognized universally among various diving organizations and serves as a benchmark for safe diving practices. In contrast, the other choices suggest either slower or potentially unsafe ascent speeds that do not align with commonly accepted diving protocols. The aim is to ensure that divers can safely return to the surface while managing the physiological effects of pressure changes.