What is the recommended surface interval between dives?

• A. 1:00
• B. 2:38
• C. 3:45
• D. 4:15

Answer: (B)

The recommended surface interval between dives is crucial for allowing the body to eliminate excess nitrogen absorbed during the first dive, thereby reducing the risk of decompression sickness (DCS). A surface interval of 2 hours and 38 minutes is both practical and within safety guidelines established by diving organizations. It gives the body adequate time to off-gas nitrogen and return to a normal state before making another descent.

Maintaining a proper surface interval not only enhances safety but also helps divers manage their dive profiles effectively, allowing for a more enjoyable experience without compromising their health. While various factors such as depth and time of the previous dive play into determining the exact necessary interval, 2:38 is a conservative and appropriate duration for most scenarios, particularly for recreational diving.