What is the maximum time a diver should be under observation after surfacing according to guidelines?

The guidelines for post-dive monitoring emphasize the importance of ensuring a diver's safety after resurfacing, especially to detect any signs of decompression sickness or other dive-related complications. The maximum observation time of two hours allows for the identification of immediate symptoms that may arise from residual nitrogen in the bloodstream or tissues.

During this period, divers are typically monitored for symptoms such as fatigue, joint pain, or any unusual physical reactions. This prolonged observation time aligns with the understanding that certain decompression sickness symptoms might not manifest immediately upon surfacing, and early detection can be critical for effective treatment. By adhering to this guideline, dive personnel can take necessary actions to provide timely medical attention if needed, thus prioritizing diver safety and health.