How should decompression stops be adjusted if the depth exceeds the original schedule during an emergency?

When managing decompression stops in an emergency situation where the diver descends deeper than originally scheduled, it is essential to ensure that the diver safely off-gasses nitrogen. In this context, multiplying the air or oxygen stop durations by 1.5 is the appropriate approach.

This adjustment accounts for the increased pressure the diver is now experiencing at a greater depth, which affects how gases are absorbed and released from the body. The depth change means that more nitrogen is likely to be accumulated in the body tissues. By extending the duration of stops, divers give their bodies more time to safely eliminate this excess nitrogen, thereby reducing the risk of decompression sickness.

The other options do not adequately address the increased risk associated with deeper dives. Simply maintaining the original stop durations or halving them would not provide the necessary time for safe off-gassing in the new, deeper environment. Continuation without adjustment is not a safe option as it disregards the physiological changes that occur at greater depths.