What is the recommended action for treating Type II DCS during a surface interval?

The recommended action for treating Type II Decompression Sickness (DCS) during a surface interval is to compress the diver to 60 feet. This depth is effective for providing the necessary pressure to help facilitate the absorption of inert gases that may have accumulated in the diver's body tissues.

At 60 feet, the increased ambient pressure aids in reducing the size of gas bubbles formed during a dive, which can alleviate symptoms associated with Type II DCS such as joint pain, neurological symptoms, and other complications. The 60-foot depth provides optimal conditions for the treatment, allowing for a controlled environment where additional medical interventions, such as administering oxygen, can be successfully implemented.

Differing depths such as 40 feet, 50 feet, or 70 feet are not optimal for treating Type II DCS. Restoring the diver's condition effectively requires a specific pressure environment that 60 feet provides, making it the standard recommendation in decompression practices.