What should divers do if they accidentally exceed the MOD?

When divers accidentally exceed the Maximum Operating Depth (MOD) for the gas they are breathing, the safest course of action is to ascend to a safer depth as soon as possible while monitoring for symptoms of oxygen toxicity or other issues related to the increased partial pressure of oxygen.

The MOD represents the depth at which the partial pressure of oxygen in the breathing gas becomes high enough to pose a risk of toxicity, which can lead to serious health implications such as seizures or other neurological effects. By ascending as quickly as possible, divers can reduce the partial pressure of oxygen and mitigate the risk of these dangers. Monitoring for symptoms during the ascent allows divers to stay aware of how their bodies are reacting to the situation and make informed decisions about their safety.

Other options, such as continuing to dive or staying at the current depth, do not adequately address the immediate risks posed by exceeding the MOD. Reporting to dive control after surfacing is important but does not provide an immediate solution to the hazardous situation created by exceeding the MOD. Safety during the dive should always be prioritized by taking action to ascend to a safer depth promptly.