What is the correct action if there is no stop time remaining during an ascent?

The appropriate action when there is no stop time remaining during an ascent is to ascend with caution. This approach emphasizes maintaining a slow and controlled ascent rate, which is crucial for reducing the risk of decompression sickness.

When a diver has completed all required safety stops and is still ascending, the absence of stop time indicates the diver should proceed to the surface. However, ascending cautiously allows the diver to monitor for any potential issues and provides sufficient time for the body to off-gas nitrogen. It helps to prevent the formation of nitrogen bubbles in the tissues, which can occur if a diver ascends too rapidly.

In contrast, ascending quickly can increase the risk of serious diving-related injuries, and continuing deep diving is not advisable without addressing the ascent protocol. Resuming normal breathing is standard practice, but it should be conducted while ascending cautiously to ensure safety. Therefore, the emphasis on caution during ascent is critical for ensuring divers return to the surface safely.