A diver with a group letter of "D" making a dive to 60 feet of seawater has a residual nitrogen time of?

To determine the residual nitrogen time for a diver with a group letter of "D" at a depth of 60 feet of seawater, it is essential to reference decompression tables or dive computers that take into account the diver's group designation and depth. Each group letter corresponds to a specific residual nitrogen time based on standard dive tables, which factor in both depth and the diver's previous exposure to nitrogen.

For a depth of 60 feet, divers in group "D" typically have a calculated residual nitrogen time of 24 minutes. This means that after spending 60 feet of seawater and depending on the dive profile, the diver would accumulate a certain amount of nitrogen in their tissues. The 24 minutes reflects the allowable surface interval before the diver can safely dive again without exceeding no-decompression limits.

Understanding residual nitrogen time is crucial for planning safe dives and ensuring that the body recovers properly from nitrogen saturation, which can help prevent decompression sickness. This particular time provided for group "D" enables divers to manage their next dive effectively and stay within safe limits.