What is the maximum depth for surface supplied dives with a bottom time of less than 30 minutes?

The maximum depth for surface supplied dives with a bottom time of less than 30 minutes is typically governed by specific diving guidelines and safety protocols. The correct answer, which reflects these guidelines, indicates a limit that considers both the physiological effects of pressure on divers and the requirements for safe diving practices.

For surface supplied diving, a maximum depth of 220 feet of seawater (FSW) allows divers to manage the risks associated with increased pressure, such as nitrogen narcosis and decompression sickness, within a relatively short bottom time. At this depth, divers can benefit from adequate safety margins for ascent times and potential decompression needs, making it a standard limit in various diving operations.

Diving deeper would necessitate more stringent precautions, longer bottom times, and increased risk, especially in terms of the required decompression protocols upon ascent. As such, 220 FSW serves as an appropriate balance between achieving operational goals and ensuring diver safety for dives lasting less than 30 minutes.