If a diver is asymptomatic and omitted a 'D' from 30' or 20', what should be done for a surface interval less than 5 minutes?

When a diver is asymptomatic and has omitted a 'D' during a dive, particularly at depths of 30 feet or 20 feet, the recommended response is to return to depth and add 1 minute to the safety stop. This action is grounded in the understanding of decompression theory and practices for safe diving.

In this scenario, the diver still has the opportunity to mitigate potential risks associated with insufficient decompression. Descending back to the prescribed depth enables the diver to off-gas any absorbed nitrogen more effectively, as the increased pressure allows for better elimination of nitrogen from the body. By adding an additional minute to the safety stop at that depth, the diver enhances their recovery and reduces the risk of decompression sickness, even in the absence of symptoms.

This approach emphasizes the importance of adhering to safe dive practices and protocols, even when a diver feels fine. Performing the necessary decompression stops is crucial for maintaining long-term safety and health in diving.

Other options, such as ascending immediately without treatment or stating that descent is not required, do not follow best practices for ensuring the diver's safety after a potential decompression issue. They overlook the potential risks connected to omitted decompression stops, which can lead to serious health consequences even if the diver is