What is the required ascent speed from 50 fsw to 40 fsw?

To determine the required ascent speed from 50 feet of saltwater (fsw) to 40 fsw, it's essential to understand common diving safety practices, especially regarding decompression and ascent rates. The accepted safe ascent rate for recreational diving typically ranges from 10 to 30 feet per minute (fsw), depending on the specific circumstances and guidelines provided by diving organizations.

The ascent from 50 fsw to 40 fsw is a relatively short ascent of 10 feet. Maintaining an ascent speed of 30 fsw/min aligns with standard practices that emphasize gradual ascents to avoid rapid changes in pressure, which can lead to decompression sickness. Following this ascent speed allows for adequate time to address potential issues and is generally considered to be a balanced approach for divers in this scenario.

Choosing 30 fsw/min ensures a safe and controlled ascent while still being efficient enough for the depth change involved. Thus, this ascent speed is appropriately chosen for the situation described.